$CI
Cigna Group Stock $ci

$ci Overview Financials Valuation SEC Filings Company Website

2019 Q1 Form 10-K Financial Statement

#000104746919000792 Filed on February 28, 2019

Income Statement

Concept	2019 Q1	2018 Q4	2017 Q4
Revenue	$37.95B	$14.30B	$10.63B
YoY Change	232.48%	34.5%	6.88%
Cost Of Revenue	$24.05B
YoY Change	4186.99%
Gross Profit	$13.90B
YoY Change	28.05%
Gross Profit Margin	36.62%
Selling, General & Admin	$3.303B
YoY Change	20.33%
% of Gross Profit	23.77%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$897.0M	$257.0M	$141.0M
YoY Change	540.71%	82.27%	-6.0%
% of Gross Profit	6.46%
Operating Expenses	$3.303B	$13.53B	$9.897B
YoY Change	20.33%	36.7%	5.97%
Operating Profit	$2.230B
YoY Change	70.49%
Interest Expense	-$452.0M	-$498.0M
YoY Change	692.98%
% of Operating Profit	-20.27%
Other Income/Expense, Net	-$452.0M
YoY Change	692.98%
Pretax Income	$1.788B	$228.0M	$758.0M
YoY Change	46.8%	-69.92%	25.29%
Income Tax	$416.0M	$80.00M	$259.0M
% Of Pretax Income	23.27%	35.09%	34.17%
Net Earnings	$1.372B	$144.0M	$266.0M
YoY Change	49.62%	-45.86%	-30.37%
Net Earnings / Revenue	3.62%	1.01%	2.5%
Basic Earnings Per Share	$3.61	$0.56	$1.09
Diluted Earnings Per Share	$3.56	$0.55	$1.07
COMMON SHARES
Basic Shares Outstanding	380.1M shares
Diluted Shares Outstanding	384.0M shares

Balance Sheet

Concept	2019 Q1	2018 Q4	2017 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$4.976B	$3.855B	$2.972B
Short-Term Investments
Other Short-Term Assets	$1.175B	$1.236B	$820.0M
YoY Change		50.73%
Inventory	$2.382B	$2.821B	$228.0M
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$21.14B	$20.43B	$9.311B
YoY Change		119.42%
LONG-TERM ASSETS
Property, Plant & Equipment	$4.523B	$4.562B	$1.563B
YoY Change	191.43%	191.87%	1.76%
Goodwill	$44.54B	$44.51B	$6.164B
YoY Change		622.01%	3.08%
Intangibles	$38.34B	$39.00B	$345.0M
YoY Change		11205.22%
Long-Term Investments	$28.92B	$28.97B	$28.62B
YoY Change	-3.16%	1.24%	6.73%
Other Assets	$2.276B	$1.630B	$1.431B
YoY Change	2270.83%	13.91%	370.72%
Total Long-Term Assets	$133.2B	$132.8B	$52.45B
YoY Change		153.2%
TOTAL ASSETS
Total Short-Term Assets	$21.14B	$20.43B	$9.311B
Total Long-Term Assets	$133.2B	$132.8B	$52.45B
Total Assets	$154.3B	$153.2B	$61.76B
YoY Change	144.45%	148.1%	4.04%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$4.488B	$4.366B	$184.0M
YoY Change	-42.65%	2272.83%	-97.13%
Accrued Expenses	$7.885B	$7.071B
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$558.0M	$0.00	$100.0M
YoY Change	458.0%	-100.0%
Long-Term Debt Due	$2.357B	$0.00	$131.0M
YoY Change	23470.0%	-100.0%	-52.54%
Total Short-Term Liabilities	$32.97B	$31.90B	$11.01B
YoY Change	203.58%	189.72%	19.38%
LONG-TERM LIABILITIES
Long-Term Debt	$37.57B	$39.52B	$5.199B
YoY Change	623.77%	660.2%	9.31%
Other Long-Term Liabilities	$3.832B	$3.470B	$2.838B
YoY Change		22.27%
Total Long-Term Liabilities	$3.832B	$42.99B	$2.838B
YoY Change	-26.18%	1414.9%	-40.33%
TOTAL LIABILITIES
Total Short-Term Liabilities	$32.97B	$31.90B	$11.01B
Total Long-Term Liabilities	$3.832B	$42.99B	$2.838B
Total Liabilities	$111.9B	$112.2B	$48.00B
YoY Change	128.61%	133.66%	5.18%
SHAREHOLDERS EQUITY
Retained Earnings	$16.43B	$15.09B	$15.80B
YoY Change		-4.51%
Common Stock	$27.86B	$27.76B	$3.014B
YoY Change		820.87%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$595.0M	$104.0M	$4.021B
YoY Change		-97.41%
Treasury Stock Shares	3.600M shares	570.0K shares	0.000 shares
Shareholders Equity	$42.41B	$41.03B	$13.71B
YoY Change
Total Liabilities & Shareholders Equity	$154.3B	$153.2B	$61.76B
YoY Change	144.45%	148.1%	4.04%

Cashflow Statement

Concept	2019 Q1	2018 Q4	2017 Q4
OPERATING ACTIVITIES
Net Income	$1.372B	$144.0M	$266.0M
YoY Change	49.62%	-45.86%	-30.37%
Depreciation, Depletion And Amortization	$897.0M	$257.0M	$141.0M
YoY Change	540.71%	82.27%	-6.0%
Cash From Operating Activities	$3.192B	$126.0M	$575.0M
YoY Change	57.63%	-78.09%	-39.6%
INVESTING ACTIVITIES
Capital Expenditures	$194.0M	-$182.0M	-$131.0M
YoY Change	88.35%	38.93%	32.32%
Acquisitions	$6.000M
YoY Change
Other Investing Activities	$0.00	-$24.52B	-$472.0M
YoY Change	-100.0%	5095.34%	-46.73%
Cash From Investing Activities	$475.0M	-$24.70B	-$603.0M
YoY Change	-127.94%	3996.85%	-38.78%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$409.0M
YoY Change	41.03%
Debt Paid & Issued, Net	$1.000B
YoY Change	663.36%
Cash From Financing Activities	-$2.534B	4.400B	-683.0M
YoY Change	378.11%	-744.22%	-2376.67%
NET CHANGE
Cash From Operating Activities	$3.192B	126.0M	575.0M
Cash From Investing Activities	$475.0M	-24.70B	-603.0M
Cash From Financing Activities	-$2.534B	4.400B	-683.0M
Net Change In Cash	$1.121B	-20.18B	-711.0M
YoY Change	-657.71%	2737.97%	23600.0%
FREE CASH FLOW
Cash From Operating Activities	$3.192B	$126.0M	$575.0M
Capital Expenditures	$194.0M	-$182.0M	-$131.0M
Free Cash Flow	$2.998B	$308.0M	$706.0M
YoY Change	55.98%	-56.37%	-32.83%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2017Q4	ci	Finite Lived Intangible Assets Gross Voba FiniteLivedIntangibleAssetsGrossVoba	232000000	USD
CY2017Q4	ci	Insurance Customer Receivables InsuranceCustomerReceivables	1818000000	USD
CY2018Q4	ci	Noninsurance Customer Receivables Excluding Pharmaceutical Manufacturers Receivable NoninsuranceCustomerReceivablesExcludingPharmaceuticalManufacturersReceivable	4988000000	USD
CY2017Q4	ci	Noninsurance Customer Receivables Excluding Pharmaceutical Manufacturers Receivable NoninsuranceCustomerReceivablesExcludingPharmaceuticalManufacturersReceivable	441000000	USD
CY2018Q4	ci	Pharmaceutical Manufacturer Receivable PharmaceuticalManufacturerReceivable	3321000000	USD
CY2017Q4	ci	Pharmaceutical Manufacturer Receivable PharmaceuticalManufacturerReceivable	645000000	USD
CY2018Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	276000000	USD
CY2017Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	251000000	USD
CY2018Q4	ci	Pharmaceutical Manufacturer Rebate Noninsurance Customer PharmaceuticalManufacturerRebateNoninsuranceCustomer	406000000	USD
CY2017Q4	ci	Pharmaceutical Manufacturer Rebate Noninsurance Customer PharmaceuticalManufacturerRebateNoninsuranceCustomer	336000000	USD
CY2018Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance		USD
CY2017Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance		USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-498000000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-252000000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-278000000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	217000000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	210000000	USD
CY2018Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	1200000000	USD
CY2018Q3	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	20000000000	USD
CY2017Q4	ci	Accounts Payable Accrued Expenses Other Liabilities Current AccountsPayableAccruedExpensesOtherLiabilitiesCurrent	4147000000	USD
CY2018Q4	ci	Intangible Assets Gross Excluding Goodwill Including Voba IntangibleAssetsGrossExcludingGoodwillIncludingVoba	41076000000	USD
CY2018Q4	ci	Finite Lived Intangible Assets Accumulated Amortization Including Voba FiniteLivedIntangibleAssetsAccumulatedAmortizationIncludingVoba	1510000000	USD
CY2018Q4	ci	Finite Lived Intangible Assets Gross Voba FiniteLivedIntangibleAssetsGrossVoba	665000000	USD
CY2018Q4	ci	Finite Lived Intangible Assets Accumulated Amortization Voba FiniteLivedIntangibleAssetsAccumulatedAmortizationVoba	102000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	9453000000	USD
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2016	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-74000000	USD
CY2018	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-705000000	USD
CY2017	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	233000000	USD
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Entity Registrant Name EntityRegistrantName	CIGNA Corporation
CY2018	dei	Trading Symbol TradingSymbol	CI
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	380058967	shares
CY2018Q2	dei	Entity Public Float EntityPublicFloat	41200000000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	36113000000	USD
CY2017	us-gaap	Premiums Earned Net PremiumsEarnedNet	32491000000	USD
CY2016	us-gaap	Premiums Earned Net PremiumsEarnedNet	30824000000	USD
CY2018	us-gaap	Net Investment Income NetInvestmentIncome	1480000000	USD
CY2017	us-gaap	Net Investment Income NetInvestmentIncome	1226000000	USD
CY2016	us-gaap	Net Investment Income NetInvestmentIncome	1147000000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1036000000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1132000000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1062000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-101000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	242000000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	74000000	USD
CY2018	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	0	USD
CY2017	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-5000000	USD
CY2016	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-17000000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	10.69
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.92
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.31
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	10.54
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CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	935000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1374000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1136000000	USD
CY2018	ci	Realized Investment Gain Loss RealizedInvestmentGainLoss	-81000000	USD
CY2017	ci	Realized Investment Gain Loss RealizedInvestmentGainLoss	237000000	USD
CY2016	ci	Realized Investment Gain Loss RealizedInvestmentGainLoss	169000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2247000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	2241000000	USD
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CY2018	ci	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest Redeemable OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterestRedeemable	-15000000	USD
CY2017	ci	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest Redeemable OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterestRedeemable	-3000000	USD
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CY2018	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	9000000	USD
CY2017	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	0	USD
CY2016	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-7000000	USD
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CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	300000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-132000000	USD
CY2018	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-365000000	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-152000000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-127000000	USD
CY2017	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-37000000	USD
CY2017	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	304000000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-33000000	USD
CY2016	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-95000000	USD
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CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-6000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-8000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-34000000	USD
CY2018Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	1901000000	USD
CY2017Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	1518000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3855000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4562000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	44505000000	USD
CY2018Q4	us-gaap	Separate Account Assets SeparateAccountAssets	7839000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2972000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1563000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	6164000000	USD
CY2017Q4	us-gaap	Separate Account Assets SeparateAccountAssets	8423000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	22928000000	USD
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CY2018Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	1858000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	41035000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	13711000000	USD
CY2016	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	10000000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2760000000	USD
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CY2016	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	-7000000	USD
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CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	13703000000	USD
CY2016	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	110000000	USD
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CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	300000000	USD
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CY2017	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	0	USD
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CY2017Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	49000000	USD
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CY2018	ci	Noncontrolling Interest Other Changes NoncontrollingInterestOtherChanges	0	USD
CY2018	us-gaap	Temporary Equity Other Changes TemporaryEquityOtherChanges	-6000000	USD
CY2017	ci	Noncontrolling Interest Other Changes NoncontrollingInterestOtherChanges	-2000000	USD
CY2017	us-gaap	Temporary Equity Other Changes TemporaryEquityOtherChanges	-6000000	USD
CY2016	us-gaap	Temporary Equity Other Changes TemporaryEquityOtherChanges	6000000	USD
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CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	1544000000	USD
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CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	610000000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018	us-gaap	Nature Of Operations NatureOfOperations	<div><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;color:#000000;' >Note </font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;color:#000000;' >1</font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;color:#000000;' > – Description of Business</font></p><p style='text-align:justify;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >Cigna Corporation, together with its subsidiaries (either individually or collectively referred to as “Cigna,” the “Company,” “we,” “our” or “us”</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >is a global health service organization dedicated to a mission of </font><font style='font-family:Times New Roman;font-size:10pt;' >helping those we serve improve their health, well-being and peace of mind. Our evolved strategy in support of our mission is </font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;' >Go Deeper</font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;' >,</font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;' > </font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;' >Go Local</font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;' >, </font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;' >Go Beyond</font><font style='font-family:Times New Roman;font-size:10pt;' > using </font><font style='font-family:Times New Roman;font-size:10pt;' >a differentiated set of medical, </font><font style='font-family:Times New Roman;font-size:10pt;' >pharmacy, </font><font style='font-family:Times New Roman;font-size:10pt;' >dental, disability, life and accident i</font><font style='font-family:Times New Roman;font-size:10pt;' >nsurance</font><font style='font-family:Times New Roman;font-size:10pt;' > and related products and services</font><font style='font-family:Times New Roman;font-size:10pt;' > offered by our subsidiaries</font><font style='font-family:Times New Roman;font-size:10pt;' >. </font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The majority of these products are offered through employers and other groups such as governmental and non-governmental organizations, unions and associations. Cigna also offers co</font><font style='font-family:Times New Roman;font-size:10pt;' >mmercial health and dental insurance, Medicare and Medicaid products and health, life and accident insurance coverages to individuals in the United States and selected international markets. In addition to these ongoing operations, Cigna also has certain </font><font style='font-family:Times New Roman;font-size:10pt;' >run-off operations.</font></p></div><p style='line-height:20pt;' /><div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >As described more fully in Note 3, on March 8, 2018, the Company entered into a merger agreement with Express Scripts Holding Company (“Express Scripts”). </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Following entry into the merger agreement and throughout the pendency of the transaction, Cigna and</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > Express Scripts designed integration plans to implement a new management and business reporting structure for the combined company immediately upon closing. On December 20, 2018, Cigna completed the acquisition of Express Scripts. </font><font style='font-family:Times New Roman;font-size:10pt;' >As a result, our </font><font style='font-family:Times New Roman;font-size:10pt;' >segme</font><font style='font-family:Times New Roman;font-size:10pt;' >nts have changed as described below, effective in the fourth quarter of 2018. </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Financial data for all prior periods presented was re</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >stated to reflect this new segment </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >presentation</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >. </font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;margin-left:0pt;color:#000000;' >Integrated Medical</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > offers a variety of medical solutions to employers an</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >d individuals. </font></p><p style='text-align:left;line-height:12pt;' ></p><ul style='margin-top:0pt;' ><li style='list-style:disc;text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >The </font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;color:#000000;' >Commercial</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > operating segment serves employers (also referred to as “clients”) and their employees (also referred to as “customers”) and other groups. This segment provides deeply integrated medical and specialty offerings including m</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >edical, pharmacy, dental, behavioral health and vision, health advocacy programs and other products and services to insured and self-insured clients.</font></li><li style='list-style:disc;text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >The</font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;color:#000000;' > Government </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >operating segment offers Medicare Advantage, Medicare Supplement, and Medicare Part D plans</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > to Medicare-eligible beneficiaries as well as Medicaid plans. This operating segment also offers health insurance coverage to individual customers both on and off the public exchanges. This segment includes the acquired Express Scripts’ Medicare Part D </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >business.</font></li></ul><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;margin-left:0pt;color:#000000;' >Health Services </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >includes pharmacy benefits management (“PBM”), pharmacy home delivery, and certain medical management services. This segment includes Express Scripts’ business from the date of acquisition with the exception of Express Scripts’ </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Medicare Part D business that is reported in the Government operating segment.</font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;margin-left:0pt;color:#000000;' >International Markets </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >includes supplemental health, life and accident insurance products and health care coverage in our international markets as well as health care benefits</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > to globally mobile employees of multinational organizations.</font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;color:#000000;' >The remainder of our business operations are reported in </font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;color:#000000;' >Group Disability and Other, </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >consisting of the following:</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:22.5pt;color:#000000;' > </font></p><ul style='margin-top:0pt;' ><li style='list-style:disc;text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;color:#000000;' >Group Disability and Life</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > provides group long-term and short-term disability</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >, group life, accident, voluntary and specialty insurance products and related services.</font></li></ul><ul style='margin-top:0pt;' ><li style='list-style:disc;text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;color:#000000;' >Corporate-Owned Life Insurance (“COLI”)</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > offers </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >permanent insurance contracts sold to corporations to provide coverage on the lives of certain employees for the purpose</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > of financing employer-paid future benefit obligations.</font></li></ul><ul style='margin-top:0pt;' ><li style='list-style:disc;text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;color:#000000;' >Run-off businesses:</font></li></ul></div><p style='line-height:20pt;' /><div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;color:#000000;' >Reinsurance:</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > predominantly comprised of guaranteed minimum death benefit (“GMDB”) and guaranteed minimum income benefit (“GMIB”) business effectively exited through reinsurance wi</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >th Berkshire Hathaway Life Insurance Company of Nebraska (“Berkshire”) in 2013.</font></p></div><p style='line-height:20pt;' /><div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;color:#000000;' >Settlement Annuity</font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;color:#000000;' > </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >business in run-off.</font></p></div><p style='line-height:20pt;' /><div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;color:#000000;' >Individual Life Insurance and Annuity and Retirement Benefits Businesses:</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > deferred gains from the sales of these businesses.</font></p></div><p style='line-height:20pt;' /><div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;color:#000000;' >Certain </font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;color:#000000;' >international run-off businesses</font></p></div><p style='line-height:20pt;' /><div><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;margin-left:0pt;color:#000000;' >Corporate</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >reflects amounts not allocated to operating segments, including interest expense</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >,</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > net investment income on investments not supporting segment </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >and other </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >operations, interest on uncertain tax positions, certain lit</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >igation matters, compensation cost for stock options</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > and related excess tax benefits</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >, expense associated with our fr</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >ozen pension plans, severance, certain </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >overhead and project costs</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > and </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >intersegment eliminations</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > for products and services sold between segments</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >.</font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;line-height:12pt;' ></p></div>
CY2018	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	406000000	USD
CY2017	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	322000000	USD
CY2016	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	292000000	USD
CY2018	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	246652000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3573000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	250225000	shares
CY2018	ci	Earnings Per Share Effect Of Dilution EarningsPerShareEffectOfDilution	-0.15
CY2017	ci	Earnings Per Share Effect Of Dilution EarningsPerShareEffectOfDilution	-0.15
CY2017	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	250892000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	4180000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	255072000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	259647000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	255360000	shares
CY2016	ci	Earnings Per Share Effect Of Dilution EarningsPerShareEffectOfDilution	-0.12
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	4287000	shares
CY2018Q4	us-gaap	Shortduration Insurance Contracts Discounted Liabilities Aggregate Discount ShortdurationInsuranceContractsDiscountedLiabilitiesAggregateDiscount	1100000000	USD
CY2017Q4	us-gaap	Shortduration Insurance Contracts Discounted Liabilities Aggregate Discount ShortdurationInsuranceContractsDiscountedLiabilitiesAggregateDiscount	1000000000	USD
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	900000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	900000	shares
CY2016	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2300000	shares
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	243000000	USD
CY2016	us-gaap	Interest Expense Debt InterestExpenseDebt	251000000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	507000000	USD
CY2018Q4	us-gaap	Commercial Paper CommercialPaper	1500000000	USD
CY2017Q4	us-gaap	Commercial Paper CommercialPaper	100000000	USD
CY2018Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	117000000	USD
CY2017Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	9000000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	131000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	4700000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	2250000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	7378000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	4000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	4917000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	14000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	4000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	4000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1337000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	7000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	20582000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	17000000	USD
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2018Q4	us-gaap	Short Duration Contracts Discounted Liabilities Amount ShortDurationContractsDiscountedLiabilitiesAmount	4200000000	USD
CY2017Q4	us-gaap	Short Duration Contracts Discounted Liabilities Amount ShortDurationContractsDiscountedLiabilitiesAmount	4000000000	USD
CY2018	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	452000000	USD
CY2017	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	325000000	USD
CY2016	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	540000000	USD
CY2018Q4	ci	Percent Level2 Fixed Maturities Equity Securities PercentLevel2FixedMaturitiesEquitySecurities	0.96	pure
CY2018Q4	ci	Maximum Percent Level2 Investments Foreign Bonds Broker Quote MaximumPercentLevel2InvestmentsForeignBondsBrokerQuote	0.01	pure
CY2018	ci	Percent Level3 Fixed Maturities Equity Securities PercentLevel3FixedMaturitiesEquitySecurities	0.02	pure
CY2018Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Amount Asset FairValueDisclosureOffbalanceSheetRisksAmountAsset		USD
CY2017Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Amount Asset FairValueDisclosureOffbalanceSheetRisksAmountAsset		USD
CY2018Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Amount Liability FairValueDisclosureOffbalanceSheetRisksAmountLiability		USD
CY2017Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Amount Liability FairValueDisclosureOffbalanceSheetRisksAmountLiability		USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	4577000000	USD
CY2018Q4	ci	Guaranteed Separate Account Assets GuaranteedSeparateAccountAssets	454000000	USD
CY2018Q4	ci	Non Guaranteed Separate Account Assets Classified In Fair Value Hierarchy NonGuaranteedSeparateAccountAssetsClassifiedInFairValueHierarchy	6653000000	USD
CY2018Q4	ci	Separate Account Assets Classified In Fair Value Hierarchy SeparateAccountAssetsClassifiedInFairValueHierarchy	7107000000	USD
CY2018Q4	ci	Non Guaranteed Separate Account Assets Priced At Net Asset Value As A Practical Expedient NonGuaranteedSeparateAccountAssetsPricedAtNetAssetValueAsAPracticalExpedient	732000000	USD
CY2017Q4	ci	Guaranteed Separate Account Assets GuaranteedSeparateAccountAssets	523000000	USD
CY2017Q4	ci	Non Guaranteed Separate Account Assets Classified In Fair Value Hierarchy NonGuaranteedSeparateAccountAssetsClassifiedInFairValueHierarchy	7126000000	USD
CY2017Q4	ci	Separate Account Assets Classified In Fair Value Hierarchy SeparateAccountAssetsClassifiedInFairValueHierarchy	7649000000	USD
CY2017Q4	ci	Non Guaranteed Separate Account Assets Priced At Net Asset Value As A Practical Expedient NonGuaranteedSeparateAccountAssetsPricedAtNetAssetValueAsAPracticalExpedient	774000000	USD
CY2018Q4	ci	Carrying Value Of Non Income Producing Real Estate Entities And Securities Partnerships CarryingValueOfNonIncomeProducingRealEstateEntitiesAndSecuritiesPartnerships	150000000	USD
CY2017Q4	ci	Carrying Value Of Non Income Producing Real Estate Entities And Securities Partnerships CarryingValueOfNonIncomeProducingRealEstateEntitiesAndSecuritiesPartnerships	191000000	USD
CY2018	ci	Other Long Term Investment Amounts Percentage Commited To Be Disbursed OtherLongTermInvestmentAmountsPercentageCommitedToBeDisbursed	0.26	pure
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1323000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	6452000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	10205000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	4064000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	506000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	1327000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	6522000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	9992000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	510000000	USD
CY2018Q4	ci	Available For Sale Securities Fixed Maturities Fair Value Excluding Trading Hybrid AvailableForSaleSecuritiesFixedMaturitiesFairValueExcludingTradingHybrid	22928000000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	22550000000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	21867000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	852000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	474000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	100000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1371000000	USD
CY2018	ci	Interest And Dividend Income Operating And Operating Leases Income Statement Lease Revenue InterestAndDividendIncomeOperatingAndOperatingLeasesIncomeStatementLeaseRevenue	1535000000	USD
CY2018	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	55000000	USD
CY2017	ci	Interest And Dividend Income Operating And Operating Leases Income Statement Lease Revenue InterestAndDividendIncomeOperatingAndOperatingLeasesIncomeStatementLeaseRevenue	1276000000	USD
CY2017	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	50000000	USD
CY2016	ci	Interest And Dividend Income Operating And Operating Leases Income Statement Lease Revenue InterestAndDividendIncomeOperatingAndOperatingLeasesIncomeStatementLeaseRevenue	1190000000	USD
CY2016	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	43000000	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	28000000	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	47000000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	103000000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	18000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	83000000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	7000000	USD
CY2018	us-gaap	Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet		USD
CY2017	us-gaap	Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet		USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax		USD
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet		USD
CY2017	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet		USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax		USD
CY2018	us-gaap	Variable Interest Entity Methodology For Determining Whether Enterprise Is Primary Beneficiary VariableInterestEntityMethodologyForDeterminingWhetherEnterpriseIsPrimaryBeneficiary	When the Company becomes involved with a variable interest entity, as well as when there is a change in the Company’s involvement with an entity, the Company must determine if it is the primary beneficiary and must consolidate the entity. The Company would be considered the primary beneficiary if it has the power to direct the entity’s most significant economic activities or has the right to receive benefits or obligation to absorb losses that could be significant to the entity. The Company evaluates the following criteria: the structure and purpose of the entity; the risks and rewards created by and shared through the entity; and the Company’s ability to direct its activities, receive its benefits and absorb its losses relative to the other parties involved with the entity including its sponsors, equity holders, guarantors, creditors and servicers.
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	113000000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	122000000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	196000000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	25700000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	14000000	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	6800000	shares
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	36000000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	79000000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	57000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	180000000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	178000000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	128000000	USD
CY2018	ci	Lessee Leasing Arrangements Capital Leases Term LesseeLeasingArrangementsCapitalLeasesTerm	P4Y
CY2018	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-30000000	USD
CY2017	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	30000000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	5980000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	7958000000	USD
CY2018	us-gaap	Statutory Accounting Practices Statutory Net Income Amount StatutoryAccountingPracticesStatutoryNetIncomeAmount	3400000000	USD
CY2017	us-gaap	Statutory Accounting Practices Statutory Net Income Amount StatutoryAccountingPracticesStatutoryNetIncomeAmount	2500000000	USD
CY2017Q4	us-gaap	Statutory Capital And Surplus Applying National Association Of Insurance Commissioners Naic Practices StatutoryCapitalAndSurplusApplyingNationalAssociationOfInsuranceCommissionersNAICPractices	10400000000	USD
CY2016	us-gaap	Statutory Accounting Practices Statutory Net Income Amount StatutoryAccountingPracticesStatutoryNetIncomeAmount	2000000000	USD
CY2016Q4	us-gaap	Statutory Capital And Surplus Applying National Association Of Insurance Commissioners Naic Practices StatutoryCapitalAndSurplusApplyingNationalAssociationOfInsuranceCommissionersNAICPractices	8500000000	USD
CY2018Q4	us-gaap	Statutory Accounting Practices Statutory Capital And Surplus Required StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired	3900000000	USD
CY2018Q4	us-gaap	Assets Held By Insurance Regulators AssetsHeldByInsuranceRegulators	600000000	USD
CY2018Q4	ci	Statutory Accounting Practices Amount Permitted Lending Authority Of Life Insurance Subsidiary To Parent StatutoryAccountingPracticesAmountPermittedLendingAuthorityOfLifeInsuranceSubsidiaryToParent	1300000000	USD
CY2018Q4	us-gaap	Amount Of Restricted Net Assets For Consolidated And Unconsolidated Subsidiaries AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries	15500000000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	3396000000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	3050000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4613000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	566000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	3169000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	2164000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	2062000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1844000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1777000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	860000000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	162000000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	162000000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	151000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	199000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	182000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	148000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	116000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	84000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	132000000	USD
CY2018Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPayments	2100000000	USD
CY2018Q4	us-gaap	Statutory Capital And Surplus Applying National Association Of Insurance Commissioners Naic Practices StatutoryCapitalAndSurplusApplyingNationalAssociationOfInsuranceCommissionersNAICPractices	12200000000	USD
CY2018Q4	us-gaap	Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries	135000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	255000000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.261	pure
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.381	pure
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-34000000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	804000000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	185000000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	47000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	974000000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	122000000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	36000000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	935000000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	95000000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-4000000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	32000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-75000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	204000000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	69000000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	8000000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	39000000	USD
CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	9000000	USD
CY2018	ci	Income Tax Reconciliation Permanently Reinvested Foreign Earnings IncomeTaxReconciliationPermanentlyReinvestedForeignEarnings	-74000000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	10000000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	25000000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-73000000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	23000000	USD
CY2017	ci	Income Tax Reconciliation Permanently Reinvested Foreign Earnings IncomeTaxReconciliationPermanentlyReinvestedForeignEarnings	70000000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	18000000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	24000000	USD
CY2016	ci	Income Tax Reconciliation Permanently Reinvested Foreign Earnings IncomeTaxReconciliationPermanentlyReinvestedForeignEarnings	57000000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	752000000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1262000000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1043000000	USD
CY2018	ci	Income Tax Reconciliation Health Insurance Industry Tax IncomeTaxReconciliationHealthInsuranceIndustryTax	78000000	USD
CY2017	ci	Income Tax Reconciliation Health Insurance Industry Tax IncomeTaxReconciliationHealthInsuranceIndustryTax	0	USD
CY2016	ci	Income Tax Reconciliation Health Insurance Industry Tax IncomeTaxReconciliationHealthInsuranceIndustryTax	108000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	411000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	279000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Policyholder Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsPolicyholderLiabilities	402000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Policyholder Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsPolicyholderLiabilities	358000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	105000000	USD
CY2017Q4	ci	Deferred Tax Liabilities Unrealized Gains On Investments And Unrealized Currency Transaction Gains DeferredTaxLiabilitiesUnrealizedGainsOnInvestmentsAndUnrealizedCurrencyTransactionGains	102000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	340000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	101000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	205000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	91000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1613000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	934000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	199000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	72000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1414000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	862000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	838000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	176000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	10867000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	823000000	USD
CY2018Q4	ci	Deferred Tax Liabilities Unrealized Gains On Investments And Unrealized Currency Transaction Gains DeferredTaxLiabilitiesUnrealizedGainsOnInvestmentsAndUnrealizedCurrencyTransactionGains	-29000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	55000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	35000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	6000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	12000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	928000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	7000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	35000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	31000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	10000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	8000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	31000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	1000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	2000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	1000000	USD
CY2016	us-gaap	Proceeds From Collection Of Loans Receivable ProceedsFromCollectionOfLoansReceivable	316000000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	734000000	USD
CY2017	us-gaap	Proceeds From Collection Of Loans Receivable ProceedsFromCollectionOfLoansReceivable	335000000	USD
CY2018Q3	ci	Price Range Common Stock Low PriceRangeCommonStockLow	166.88
CY2018Q4	ci	Price Range Common Stock Low PriceRangeCommonStockLow	176.52
CY2017Q1	ci	Price Range Common Stock Low PriceRangeCommonStockLow	133.52
CY2017Q2	ci	Price Range Common Stock Low PriceRangeCommonStockLow	146.7
CY2017Q3	ci	Price Range Common Stock Low PriceRangeCommonStockLow	166.81
CY2018Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.04
CY2018Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2018Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2018Q1	ci	Price Range Common Stock High PriceRangeCommonStockHigh	227.13
CY2018Q2	ci	Price Range Common Stock High PriceRangeCommonStockHigh	182.1
CY2018Q3	ci	Price Range Common Stock High PriceRangeCommonStockHigh	208.73
CY2018Q4	ci	Price Range Common Stock High PriceRangeCommonStockHigh	226.61
CY2017Q1	ci	Price Range Common Stock High PriceRangeCommonStockHigh	154.83
CY2017Q2	ci	Price Range Common Stock High PriceRangeCommonStockHigh	173.21
CY2017Q3	ci	Price Range Common Stock High PriceRangeCommonStockHigh	188.36
CY2018Q1	ci	Price Range Common Stock Low PriceRangeCommonStockLow	163.02
CY2018Q2	ci	Price Range Common Stock Low PriceRangeCommonStockLow	163.8
CY2018Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2017Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.04
CY2017Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2017Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.72
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1218000000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.78
CY2018Q1	us-gaap	Revenues Revenues	11413000000	USD
CY2018Q2	us-gaap	Revenues Revenues	11480000000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1102000000	USD
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.32
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.29
CY2018Q3	us-gaap	Revenues Revenues	11457000000	USD
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.14
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.18
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1033000000	USD
CY2018Q4	us-gaap	Revenues Revenues	14300000000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	228000000	USD
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	890000000	USD
CY2017Q1	us-gaap	Revenues Revenues	10428000000	USD
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.3
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.34
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	4000000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1134000000	USD
CY2017Q2	us-gaap	Revenues Revenues	10374000000	USD
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.2
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.15
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	824000000	USD
CY2017Q3	us-gaap	Revenues Revenues	10372000000	USD
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.21
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.25
CY2018Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	915000000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	560000000	USD
CY2017Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	598000000	USD
CY2017Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	813000000	USD
CY2017Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	266000000	USD
CY2017Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2017Q4	ci	Price Range Common Stock High PriceRangeCommonStockHigh	212.46
CY2017Q4	ci	Price Range Common Stock Low PriceRangeCommonStockLow	183.08
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.09
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.07
CY2017Q4	us-gaap	Revenues Revenues	10632000000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	758000000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	806000000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	772000000	USD
CY2018Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	144000000	USD
CY2017Q1	ci	Transaction Related Costs After Tax TransactionRelatedCostsAfterTax	49000000	USD
CY2017Q2	ci	Transaction Related Costs After Tax TransactionRelatedCostsAfterTax	-47000000	USD
CY2017Q3	ci	Transaction Related Costs After Tax TransactionRelatedCostsAfterTax	6000000	USD
CY2017Q4	ci	Transaction Related Costs After Tax TransactionRelatedCostsAfterTax	25000000	USD
CY2017Q1	us-gaap	Extinguishment Of Debt Gain Loss Net Of Tax ExtinguishmentOfDebtGainLossNetOfTax	0	USD
CY2017Q2	us-gaap	Extinguishment Of Debt Gain Loss Net Of Tax ExtinguishmentOfDebtGainLossNetOfTax	0	USD
CY2017Q3	us-gaap	Extinguishment Of Debt Gain Loss Net Of Tax ExtinguishmentOfDebtGainLossNetOfTax	-209000000	USD
CY2017Q4	us-gaap	Extinguishment Of Debt Gain Loss Net Of Tax ExtinguishmentOfDebtGainLossNetOfTax	0	USD
CY2017Q1	ci	Special Item Charge After Tax Risk Corridor Reserve SpecialItemChargeAfterTaxRiskCorridorReserve	0	USD
CY2017Q2	ci	Special Item Charge After Tax Risk Corridor Reserve SpecialItemChargeAfterTaxRiskCorridorReserve	0	USD
CY2017Q3	ci	Special Item Charge After Tax Risk Corridor Reserve SpecialItemChargeAfterTaxRiskCorridorReserve	0	USD
CY2017Q4	ci	Special Item Charge After Tax Risk Corridor Reserve SpecialItemChargeAfterTaxRiskCorridorReserve	0	USD
CY2018Q4	ci	Mortgage Loans On Real Estate Maturities After Year Four Percent MortgageLoansOnRealEstateMaturitiesAfterYearFourPercent	0.93	pure
CY2017Q1	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 After Tax SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017AfterTax	0	USD
CY2017Q2	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 After Tax SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017AfterTax	0	USD
CY2017Q3	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 After Tax SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017AfterTax	0	USD
CY2017Q2	ci	Special Item Charge After Tax Penn Treaty SpecialItemChargeAfterTaxPennTreaty	0	USD
CY2017Q4	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 After Tax SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017AfterTax	196000000	USD
CY2017Q1	ci	Special Item Charge After Tax Penn Treaty SpecialItemChargeAfterTaxPennTreaty	83000000	USD
CY2018Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	57000000	USD
CY2017Q3	ci	Special Item Charge After Tax Penn Treaty SpecialItemChargeAfterTaxPennTreaty	0	USD
CY2017Q4	ci	Special Item Charge After Tax Penn Treaty SpecialItemChargeAfterTaxPennTreaty	0	USD
CY2017Q1	ci	Special Item Gain Or Loss Net Of Tax Attributable To Reportng Entity SpecialItemGainOrLossNetOfTaxAttributableToReportngEntity	-132000000	USD
CY2017Q2	ci	Special Item Gain Or Loss Net Of Tax Attributable To Reportng Entity SpecialItemGainOrLossNetOfTaxAttributableToReportngEntity	47000000	USD
CY2017Q3	ci	Special Item Gain Or Loss Net Of Tax Attributable To Reportng Entity SpecialItemGainOrLossNetOfTaxAttributableToReportngEntity	-215000000	USD
CY2017Q4	ci	Special Item Gain Or Loss Net Of Tax Attributable To Reportng Entity SpecialItemGainOrLossNetOfTaxAttributableToReportngEntity	-221000000	USD
CY2018Q4	ci	Acquiror Merger Agreement Termination Fee Regulatory Approval Not Attained AcquirorMergerAgreementTerminationFeeRegulatoryApprovalNotAttained	1850000000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	38371000000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	154000000	USD
CY2017	ci	Tax Cuts And Jobs Act Of2017 Income Tax Expense Benefit Incomplete Accounting Provisional Amount TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefitIncompleteAccountingProvisionalAmount	232000000	USD
CY2016	ci	Tax Cuts And Jobs Act Of2017 Income Tax Expense Benefit Incomplete Accounting Provisional Amount TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefitIncompleteAccountingProvisionalAmount	0	USD
CY2017Q3	us-gaap	Extinguishment Of Debt Amount ExtinguishmentOfDebtAmount	1000000000	USD
CY2017Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-321000000	USD
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001739940
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Investment Redemption Frequency FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareInvestmentRedemptionFrequency	Quarterly redemption frequency
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	433000000	USD
CY2018Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	89000000	USD
CY2018	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAnnualAmount		USD
CY2018	us-gaap	Revenues Revenues	48650000000	USD
CY2017	us-gaap	Revenues Revenues	41806000000	USD
CY2016	us-gaap	Revenues Revenues	39838000000	USD
CY2018	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	27528000000	USD
CY2017	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	25263000000	USD
CY2016	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	24341000000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	4793000000	USD
CY2017	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2456000000	USD
CY2016	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2468000000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	11934000000	USD
CY2017	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	10030000000	USD
CY2016	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	9790000000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	235000000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	115000000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	151000000	USD
CY2018	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	44490000000	USD
CY2017	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	37864000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3606000000	USD
CY2016	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	36750000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	4160000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	3942000000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	3088000000	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-321000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3581000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2979000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	2646000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	2232000000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	1843000000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	9000000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-5000000	USD
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-24000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2637000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2237000000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1867000000	USD
CY2018Q4	us-gaap	Short Term Investments ShortTermInvestments	2045000000	USD
CY2018Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	10473000000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	2821000000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1236000000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	20430000000	USD
CY2017Q4	us-gaap	Short Term Investments ShortTermInvestments	2136000000	USD
CY2017Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	3155000000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	228000000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	820000000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	9311000000	USD
CY2018Q4	us-gaap	Long Term Investments LongTermInvestments	26929000000	USD
CY2018Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	2821000000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	39003000000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1630000000	USD
CY2018Q4	us-gaap	Assets Assets	153226000000	USD
CY2017Q4	us-gaap	Long Term Investments LongTermInvestments	26483000000	USD
CY2017Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	2237000000	USD
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CY2017Q4	us-gaap	Assets Assets	61759000000	USD
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CY2018Q4	ci	Pharmacy And Service Costs Payable PharmacyAndServiceCostsPayable	10702000000	USD
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CY2018Q4	us-gaap	Debt Current DebtCurrent	2955000000	USD
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CY2018Q4	ci	Insurance And Contractholder Liabilities Noncurrent InsuranceAndContractholderLiabilitiesNoncurrent	19974000000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	3470000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	39523000000	USD
CY2018Q4	us-gaap	Separate Accounts Liability SeparateAccountsLiability	7839000000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	112154000000	USD
CY2017Q4	ci	Insurance And Contractholder Liabilities Current InsuranceAndContractholderLiabilitiesCurrent	6317000000	USD
CY2017Q4	ci	Pharmacy And Service Costs Payable PharmacyAndServiceCostsPayable	305000000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	184000000	USD
CY2017Q4	ci	Accrued Expenses And Other Liabilities AccruedExpensesAndOtherLiabilities	3963000000	USD
CY2017Q4	us-gaap	Debt Current DebtCurrent	240000000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	11009000000	USD
CY2017Q4	ci	Insurance And Contractholder Liabilities Noncurrent InsuranceAndContractholderLiabilitiesNoncurrent	20530000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	0	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2838000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	5199000000	USD
CY2017Q4	us-gaap	Separate Accounts Liability SeparateAccountsLiability	8423000000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	47999000000	USD
CY2018Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	37000000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	4000000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	27751000000	USD
CY2017Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	49000000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	74000000	USD
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2940000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1711000000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	15088000000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	104000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	41028000000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	7000000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1082000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	15800000000	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	4021000000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	13711000000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	0	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	153226000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	61759000000	USD
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CY2017Q4	ci	Shareholders Equity Per Share ShareholdersEquityPerShare	56.2
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	101000000	USD
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-242000000	USD
CY2016	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-663000000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	107000000	USD
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CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-30000000	USD
CY2018	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	237000000	USD
CY2017	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	282000000	USD
CY2016	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	213000000	USD
CY2018	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	234000000	USD
CY2017	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	-115000000	USD
CY2016	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	-246000000	USD
CY2018	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	560000000	USD
CY2017	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	506000000	USD
CY2016	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	683000000	USD
CY2018	ci	Increase Decrease In Pharmacy And Service Costs Payable IncreaseDecreaseInPharmacyAndServiceCostsPayable	-842000000	USD
CY2017	ci	Increase Decrease In Pharmacy And Service Costs Payable IncreaseDecreaseInPharmacyAndServiceCostsPayable	35000000	USD
CY2016	ci	Increase Decrease In Pharmacy And Service Costs Payable IncreaseDecreaseInPharmacyAndServiceCostsPayable	-46000000	USD
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CY2017	ci	Increase Decrease In Accounts Payable Accrued And Other Operating Liabilities IncreaseDecreaseInAccountsPayableAccruedAndOtherOperatingLiabilities	696000000	USD
CY2016	ci	Increase Decrease In Accounts Payable Accrued And Other Operating Liabilities IncreaseDecreaseInAccountsPayableAccruedAndOtherOperatingLiabilities	171000000	USD
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CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-197000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-134000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3770000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4086000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4026000000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	2151000000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	2051000000	USD
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1755000000	USD
CY2018	us-gaap	Proceeds From Collection Of Loans Receivable ProceedsFromCollectionOfLoansReceivable	215000000	USD
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CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	5637000000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	5628000000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	5191000000	USD
CY2018	us-gaap	Payments To Acquire Mortgage Notes Receivable PaymentsToAcquireMortgageNotesReceivable	312000000	USD
CY2017	us-gaap	Payments To Acquire Mortgage Notes Receivable PaymentsToAcquireMortgageNotesReceivable	430000000	USD
CY2016	us-gaap	Payments To Acquire Mortgage Notes Receivable PaymentsToAcquireMortgageNotesReceivable	165000000	USD
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	1189000000	USD
CY2017	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	1065000000	USD
CY2016	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	1698000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	528000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	471000000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	461000000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	24455000000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	209000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	12000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	101000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-26378000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1703000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2574000000	USD
CY2018	us-gaap	Additions To Contract Holders Funds AdditionsToContractHoldersFunds	1040000000	USD
CY2017	us-gaap	Additions To Contract Holders Funds AdditionsToContractHoldersFunds	1230000000	USD
CY2016	us-gaap	Additions To Contract Holders Funds AdditionsToContractHoldersFunds	1460000000	USD
CY2018	us-gaap	Withdrawal From Contract Holders Funds WithdrawalFromContractHoldersFunds	1151000000	USD
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CY2016	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	131000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1250000000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	22856000000	USD
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CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	342000000	USD
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CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-225000000	USD
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CY2018	us-gaap	Interest Paid Net InterestPaidNet	267000000	USD
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CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1019000000	USD
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CY2018	ci	Non Investment Revenue NonInvestmentRevenue	47170000000	USD
CY2017	ci	Non Investment Revenue NonInvestmentRevenue	40580000000	USD
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CY2016	ci	Non Investment Revenue NonInvestmentRevenue	38691000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	240000000	USD
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CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3185000000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1968000000	USD
CY2018Q4	ci	Policyholder Contract Deposits Current PolicyholderContractDepositsCurrent	641000000	USD
CY2018Q4	ci	Liability For Future Policy Benefits Current LiabilityForFuturePolicyBenefitsCurrent	740000000	USD
CY2018Q4	ci	Unearned Premiums Current UnearnedPremiumsCurrent	348000000	USD
CY2018Q4	ci	Policyholder Contract Deposits Noncurrent PolicyholderContractDepositsNoncurrent	7365000000	USD
CY2018Q4	ci	Liability For Future Policy Benefits Noncurrent LiabilityForFuturePolicyBenefitsNoncurrent	8981000000	USD
CY2018Q4	ci	Unearned Premiums Noncurrent UnearnedPremiumsNoncurrent	379000000	USD
CY2018Q4	us-gaap	Policyholder Contract Deposits PolicyholderContractDeposits	8006000000	USD
CY2018Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	9721000000	USD
CY2018Q4	us-gaap	Unearned Premiums UnearnedPremiums	727000000	USD
CY2018Q4	ci	Insurance And Contractholder Liabilities InsuranceAndContractholderLiabilities	26775000000	USD
CY2017Q4	ci	Policyholder Contract Deposits Current PolicyholderContractDepositsCurrent	713000000	USD
CY2017Q4	ci	Liability For Future Policy Benefits Current LiabilityForFuturePolicyBenefitsCurrent	706000000	USD
CY2017Q4	ci	Unearned Premiums Current UnearnedPremiumsCurrent	319000000	USD
CY2017Q4	ci	Policyholder Contract Deposits Noncurrent PolicyholderContractDepositsNoncurrent	7483000000	USD
CY2017Q4	ci	Liability For Future Policy Benefits Noncurrent LiabilityForFuturePolicyBenefitsNoncurrent	9334000000	USD
CY2017Q4	ci	Unearned Premiums Noncurrent UnearnedPremiumsNoncurrent	405000000	USD
CY2017Q4	us-gaap	Policyholder Contract Deposits PolicyholderContractDeposits	8196000000	USD
CY2017Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	10040000000	USD
CY2017Q4	us-gaap	Unearned Premiums UnearnedPremiums	724000000	USD
CY2017Q4	ci	Insurance And Contractholder Liabilities InsuranceAndContractholderLiabilities	26847000000	USD
CY2018Q4	ci	Reinsurance Recoverables Non Current ReinsuranceRecoverablesNonCurrent	5507000000	USD
CY2017Q4	ci	Reinsurance Recoverables Non Current ReinsuranceRecoverablesNonCurrent	5763000000	USD
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	570000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	381494000	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	0	shares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	0	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	296145000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	0	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	380924000	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	0	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	0	shares
CY2018Q4	us-gaap	Stock Issued During Period Shares Acquisitions StockIssuedDuringPeriodSharesAcquisitions	137337000	shares
CY2018Q4	us-gaap	Stock Issued During Period Shares Employee Benefit Plan StockIssuedDuringPeriodSharesEmployeeBenefitPlan	91000	shares
CY2018Q4	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	289000	shares
CY2017Q4	us-gaap	Investments Investments	28619000000	USD
CY2018Q4	us-gaap	Investments Investments	28974000000	USD
CY2017Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	1761000000	USD
CY2018Q4	us-gaap	Investments In And Advances To Affiliates Amount Of Equity InvestmentsInAndAdvancesToAffiliatesAmountOfEquity	0	USD
CY2018Q4	us-gaap	Due From Affiliate Noncurrent DueFromAffiliateNoncurrent	0	USD
CY2018Q4	us-gaap	Due To Affiliate Noncurrent DueToAffiliateNoncurrent	0	USD
CY2018Q4	ci	Accrued Expenses And Other Liabilities AccruedExpensesAndOtherLiabilities	7071000000	USD
CY2016	ci	Realized Investment Gain Loss Excluding Impairments RealizedInvestmentGainLossExcludingImpairments	227000000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	2625000000	USD
CY2017	ci	Realized Investment Gain Loss Excluding Impairments RealizedInvestmentGainLossExcludingImpairments	268000000	USD
CY2018	ci	Realized Investment Gain Loss Excluding Impairments RealizedInvestmentGainLossExcludingImpairments	-34000000	USD
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	131000000	USD
CY2017Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	250000000	USD
CY2018Q4	ci	Old Cigna Shares Exchanged For Shares Of Cigna OldCignaSharesExchangedForSharesOfCigna	243785000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	600000000	shares
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	2655000000	USD
CY2018	ci	Transaction Related Costs TransactionRelatedCosts	852000000	USD
CY2018	ci	Transaction Related Costs After Tax TransactionRelatedCostsAfterTax	669000000	USD
CY2018	ci	Special Item Charge Beforetax Litigation SpecialItemChargeBeforetaxLitigation	25000000	USD
CY2018	ci	Tax Cuts And Jobs Act Of2017 Measurement Period Adjustment Change In Tax Rate Operating Expense Benefit TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentChangeInTaxRateOperatingExpenseBenefit	2000000	USD
CY2018	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017	2000000	USD
CY2018	ci	Special Item Charge After Tax Litigation SpecialItemChargeAfterTaxLitigation	19000000	USD
CY2018	ci	Tax Cuts And Jobs Act Of2017 Measurement Period Adjustment Change In Tax Rate Operating Expense Benefit After Tax TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentChangeInTaxRateOperatingExpenseBenefitAfterTax	-1000000	USD
CY2018	ci	Tax Cuts And Jobs Act Measurement Period Adjustment Income Tax Expense Benefit TaxCutsAndJobsActMeasurementPeriodAdjustmentIncomeTaxExpenseBenefit	-3000000	USD
CY2018	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 After Tax SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017AfterTax	-2000000	USD
CY2017	ci	Transaction Related Costs TransactionRelatedCosts	126000000	USD
CY2017	ci	Tax Cuts And Jobs Act Of2017 Measurement Period Adjustment Change In Tax Rate Operating Expense Benefit TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentChangeInTaxRateOperatingExpenseBenefit	-56000000	USD
CY2017	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017	-56000000	USD
CY2017	ci	Special Items Charge Before Tax Penn Treaty SpecialItemsChargeBeforeTaxPennTreaty	129000000	USD
CY2017	ci	Transaction Related Costs After Tax TransactionRelatedCostsAfterTax	33000000	USD
CY2017	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 After Tax SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017AfterTax	196000000	USD
CY2017	us-gaap	Extinguishment Of Debt Gain Loss Net Of Tax ExtinguishmentOfDebtGainLossNetOfTax	-209000000	USD
CY2017	ci	Special Item Charge After Tax Penn Treaty SpecialItemChargeAfterTaxPennTreaty	83000000	USD
CY2016	ci	Transaction Related Costs TransactionRelatedCosts	166000000	USD
CY2016	ci	Special Item Charge Before Tax Risk Corridor Reserve SpecialItemChargeBeforeTaxRiskCorridorReserve	124000000	USD
CY2016	ci	Transaction Related Costs After Tax TransactionRelatedCostsAfterTax	147000000	USD
CY2016	ci	Special Item Charge After Tax Litigation SpecialItemChargeAfterTaxLitigation	25000000	USD
CY2016	ci	Special Item Charge After Tax Risk Corridor Reserve SpecialItemChargeAfterTaxRiskCorridorReserve	80000000	USD
CY2018	ci	Revenue Transitioning Clients RevenueTransitioningClients	459000000	USD
CY2018	ci	Realized Investment Gains Losses Equity Method Investments RealizedInvestmentGainsLossesEquityMethodInvestments	-43000000	USD
CY2018	ci	Net Investment Income New Debt Merger Special Item NetInvestmentIncomeNewDebtMergerSpecialItem	123000000	USD
CY2018	ci	Segment Revenues SegmentRevenues	-48111000000	USD
CY2018	ci	Income Loss Attributable To Transitioning Clients Pretax IncomeLossAttributableToTransitioningClientsPretax	62000000	USD
CY2018	ci	Income Loss Attributable To Noncontrolling Interest Before Tax IncomeLossAttributableToNoncontrollingInterestBeforeTax	14000000	USD
CY2018	ci	Realized Investment Gain Loss Including Equity Method Subsidiaries RealizedInvestmentGainLossIncludingEquityMethodSubsidiaries	-124000000	USD
CY2018	ci	Adjusted Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest AdjustedIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4743000000	USD
CY2017	ci	Segment Revenues SegmentRevenues	41806000000	USD
CY2017	ci	Income Loss Attributable To Noncontrolling Interest Before Tax IncomeLossAttributableToNoncontrollingInterestBeforeTax	-2000000	USD
CY2017	ci	Realized Investment Gain Loss Including Equity Method Subsidiaries RealizedInvestmentGainLossIncludingEquityMethodSubsidiaries	237000000	USD
CY2017	ci	Adjusted Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest AdjustedIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4006000000	USD
CY2016	ci	Segment Revenues SegmentRevenues	39838000000	USD
CY2016	ci	Income Loss Attributable To Noncontrolling Interest Before Tax IncomeLossAttributableToNoncontrollingInterestBeforeTax	-20000000	USD
CY2016	ci	Realized Investment Gain Loss Including Equity Method Subsidiaries RealizedInvestmentGainLossIncludingEquityMethodSubsidiaries	169000000	USD
CY2016	ci	Special Item Charge Beforetax Litigation SpecialItemChargeBeforetaxLitigation	40000000	USD
CY2016	ci	Adjusted Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest AdjustedIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3311000000	USD
CY2018Q1	ci	Transaction Related Costs After Tax TransactionRelatedCostsAfterTax	50000000	USD
CY2018Q2	ci	Transaction Related Costs After Tax TransactionRelatedCostsAfterTax	109000000	USD
CY2018Q3	ci	Transaction Related Costs After Tax TransactionRelatedCostsAfterTax	108000000	USD
CY2018Q4	ci	Transaction Related Costs After Tax TransactionRelatedCostsAfterTax	402000000	USD
CY2018Q1	ci	Special Item Charge After Tax Litigation SpecialItemChargeAfterTaxLitigation	0	USD
CY2018Q2	ci	Special Item Charge After Tax Litigation SpecialItemChargeAfterTaxLitigation	0	USD
CY2018Q3	ci	Special Item Charge After Tax Litigation SpecialItemChargeAfterTaxLitigation	35000000	USD
CY2018Q4	ci	Special Item Charge After Tax Litigation SpecialItemChargeAfterTaxLitigation	-16000000	USD
CY2018Q1	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 After Tax SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017AfterTax	0	USD
CY2018Q2	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 After Tax SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017AfterTax	0	USD
CY2018Q3	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 After Tax SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017AfterTax	-5000000	USD
CY2018Q4	ci	Special Item Charges Pursuant To Tax Cuts And Jobs Act Of2017 After Tax SpecialItemChargesPursuantToTaxCutsAndJobsActOf2017AfterTax	3000000	USD
CY2018Q1	ci	Special Item Gain Or Loss Net Of Tax Attributable To Reportng Entity SpecialItemGainOrLossNetOfTaxAttributableToReportngEntity	-50000000	USD
CY2018Q2	ci	Special Item Gain Or Loss Net Of Tax Attributable To Reportng Entity SpecialItemGainOrLossNetOfTaxAttributableToReportngEntity	-109000000	USD
CY2018Q3	ci	Special Item Gain Or Loss Net Of Tax Attributable To Reportng Entity SpecialItemGainOrLossNetOfTaxAttributableToReportngEntity	-138000000	USD
CY2018Q4	ci	Special Item Gain Or Loss Net Of Tax Attributable To Reportng Entity SpecialItemGainOrLossNetOfTaxAttributableToReportngEntity	-389000000	USD
CY2016	ci	Intercompany Dividends Paid IntercompanyDividendsPaid	0	USD
CY2017	ci	Intercompany Dividends Paid IntercompanyDividendsPaid	0	USD
CY2018	ci	Loans Due From Affiliates Net LoansDueFromAffiliatesNet	0	USD
CY2018	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	528000000	USD
CY2018	ci	Increase Decrease In Amounts Due To From Affiliates IncreaseDecreaseInAmountsDueToFromAffiliates	0	USD
CY2018	ci	Intercompany Dividends Paid IntercompanyDividendsPaid	0	USD
CY2017Q4	us-gaap	Investments In And Advances To Affiliates Amount Of Equity InvestmentsInAndAdvancesToAffiliatesAmountOfEquity	0	USD
CY2017Q4	us-gaap	Due From Affiliate Noncurrent DueFromAffiliateNoncurrent	0	USD
CY2017Q4	us-gaap	Due To Affiliate Noncurrent DueToAffiliateNoncurrent	0	USD
CY2018	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet		USD
CY2018	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<div><table style='border-collapse:collapse;' ><tr style='height:14.4pt;' ><td style='width:171.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:171.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:9.75pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td colspan='5' rowspan='1' style='width:179.25pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:179.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >December 31, 2018</font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td colspan='5' rowspan='1' style='width:174pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:174pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >December 31, 2017</font></td><td style='width:12.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:12.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td></tr><tr style='height:10.2pt;' ><td style='width:171.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:171.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:9.75pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:15pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:15pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:11.25pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:11.25pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:9.75pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:left;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:12.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:12.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td></tr><tr style='height:10.2pt;' ><td style='width:171.75pt;border-bottom-style:solid;border-bottom-width:1;text-align:left;vertical-align:bottom;border-color:Black;min-width:171.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-style:italic;color:#000000;' >(In millions)</font></td><td style='width:9.75pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >Current</font></td><td style='width:15pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:15pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >Non-current</font></td><td style='width:11.25pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >Total</font></td><td style='width:11.25pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >Current</font></td><td style='width:11.25pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >Non-current</font></td><td style='width:9.75pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >Total</font></td><td style='width:12.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:12.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td></tr><tr style='height:10.2pt;' ><td style='width:171.75pt;border-top-style:solid;border-top-width:1;text-align:left;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:171.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >Contractholder deposit funds</font></td><td style='width:9.75pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >641</font></td><td style='width:15pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:15pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >7,365</font></td><td style='width:11.25pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >8,006</font></td><td style='width:11.25pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >713</font></td><td style='width:11.25pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >7,483</font></td><td style='width:9.75pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >8,196</font></td><td style='width:12.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:12.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td></tr><tr style='height:10.2pt;' ><td style='width:171.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:171.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >Future policy benefits</font></td><td style='width:9.75pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >740</font></td><td style='width:15pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:15pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >8,981</font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >9,721</font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >706</font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >9,334</font></td><td style='width:9.75pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >10,040</font></td><td style='width:12.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:12.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td></tr><tr style='height:10.2pt;' ><td style='width:171.75pt;text-align:left;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:171.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >Unpaid claims and claim expenses</font></td><td style='width:9.75pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:15pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:15pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:9.75pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:12.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:12.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td></tr><tr style='height:10.2pt;' ><td style='width:171.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:171.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >Integrated Medical</font></td><td style='width:9.75pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >2,678</font></td><td style='width:15pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:15pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >19</font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >2,697</font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >2,401</font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >19</font></td><td style='width:9.75pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >2,420</font></td><td style='width:12.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:12.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td></tr><tr style='height:10.2pt;' ><td style='width:171.75pt;text-align:left;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:171.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >Other segments</font></td><td style='width:9.75pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >2,394</font></td><td style='width:15pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:15pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >3,230</font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >5,624</font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >2,178</font></td><td style='width:11.25pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >3,289</font></td><td style='width:9.75pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >5,467</font></td><td style='width:12.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:12.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td></tr><tr style='height:10.2pt;' ><td style='width:171.75pt;border-bottom-style:solid;border-bottom-width:1;text-align:left;vertical-align:bottom;border-color:Black;min-width:171.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >Unearned premiums</font></td><td style='width:9.75pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >348</font></td><td style='width:15pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:15pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >379</font></td><td style='width:11.25pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >727</font></td><td style='width:11.25pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >319</font></td><td style='width:11.25pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >405</font></td><td style='width:9.75pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td><td style='width:51pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >724</font></td><td style='width:12.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:12.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td></tr><tr style='height:10.2pt;' ><td style='width:171.75pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:left;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:171.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >Total insurance and contractholder liabilities</font></td><td style='width:9.75pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >6,801</font></td><td style='width:15pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:15pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >19,974</font></td><td style='width:11.25pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >26,775</font></td><td style='width:11.25pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;font-weight:bold;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >6,317</font></td><td style='width:11.25pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:11.25pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >20,530</font></td><td style='width:9.75pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >$</font></td><td style='width:51pt;border-top-style:solid;border-top-width:1;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;background-color:#E6E0EC;border-color:Black;min-width:51pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' >26,847</font></td><td style='width:12.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:12.75pt;' ><font style='font-family:Times New Roman;font-size:8pt;color:#000000;' ></font></td></tr></table></div>
CY2017	ci	Loans Due From Affiliates Net LoansDueFromAffiliatesNet	0	USD
CY2017	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	471000000	USD
CY2017	ci	Increase Decrease In Amounts Due To From Affiliates IncreaseDecreaseInAmountsDueToFromAffiliates	0	USD
CY2016	ci	Loans Due From Affiliates Net LoansDueFromAffiliatesNet	0	USD
CY2016	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	461000000	USD
CY2016	ci	Increase Decrease In Amounts Due To From Affiliates IncreaseDecreaseInAmountsDueToFromAffiliates	0	USD
CY2017	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet		USD
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CY2018Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue		USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet		USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet		USD
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CY2017	ci	Impact Of Prior Year Development On Pretax Income ImpactOfPriorYearDevelopmentOnPretaxIncome	148000000	USD
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CY2017	ci	Effective Income Tax Rate Reconciliation Health Insurance Industry Tax EffectiveIncomeTaxRateReconciliationHealthInsuranceIndustryTax	0	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.006	pure
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CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.381	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2018Q4	ci	Intangible Assets Net Excluding Goodwill Including Voba IntangibleAssetsNetExcludingGoodwillIncludingVoba	39566000000	USD
CY2018Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	8400000000	USD
CY2018Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	40411000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1408000000	USD
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
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CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	40000000	USD
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CY2018Q4	ci	Commitments To Contribute Additional Equity And Capital CommitmentsToContributeAdditionalEquityAndCapital	1472000000	USD
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CY2018	ci	Business Acquisition Credit Facility Fees Before Tax BusinessAcquisitionCreditFacilityFeesBeforeTax	140000000	USD
CY2018	ci	Transaction Related Costs Other TransactionRelatedCostsOther	204000000	USD
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CY2018	ci	Business Acquisition Credit Facility Fees After Tax BusinessAcquisitionCreditFacilityFeesAfterTax	111000000	USD
CY2018	ci	Transaction Related Costs After Tax Excluding Merger Termination Tax Benefit TransactionRelatedCostsAfterTaxExcludingMergerTerminationTaxBenefit	133000000	USD
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CY2017	ci	Business Acquisition Charitable Contributions Before Tax BusinessAcquisitionCharitableContributionsBeforeTax	0	USD
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CY2017	ci	Business Acquisition Credit Facility Fees Before Tax BusinessAcquisitionCreditFacilityFeesBeforeTax	0	USD
CY2017	ci	Transaction Related Costs Other TransactionRelatedCostsOther	90000000	USD
CY2017	ci	Interest Expense New Debt Merger After Tax InterestExpenseNewDebtMergerAfterTax	0	USD
CY2017	ci	Net Investment Income New Debt Merger After Tax NetInvestmentIncomeNewDebtMergerAfterTax	0	USD
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CY2017	ci	Business Acquisition Credit Facility Fees After Tax BusinessAcquisitionCreditFacilityFeesAfterTax	0	USD
CY2017	ci	Transaction Related Costs After Tax Excluding Merger Termination Tax Benefit TransactionRelatedCostsAfterTaxExcludingMergerTerminationTaxBenefit	69000000	USD
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CY2016	ci	Interest Expense New Debt Merger InterestExpenseNewDebtMerger	0	USD
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CY2016	ci	Business Acquisition Charitable Contributions Before Tax BusinessAcquisitionCharitableContributionsBeforeTax	0	USD
CY2016	ci	Business Acquisition Legal And Advisory Fees Before Tax BusinessAcquisitionLegalAndAdvisoryFeesBeforeTax	96000000	USD
CY2016	ci	Business Acquisition Credit Facility Fees Before Tax BusinessAcquisitionCreditFacilityFeesBeforeTax	0	USD
CY2016	ci	Transaction Related Costs Other TransactionRelatedCostsOther	70000000	USD
CY2016	ci	Interest Expense New Debt Merger After Tax InterestExpenseNewDebtMergerAfterTax	0	USD
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CY2016	ci	Business Acquisition Charitable Contributions After Tax BusinessAcquisitionCharitableContributionsAfterTax	0	USD
CY2016	ci	Business Acquisition Legal And Advisory Fees After Tax BusinessAcquisitionLegalAndAdvisoryFeesAfterTax	95000000	USD
CY2016	ci	Business Acquisition Credit Facility Fees After Tax BusinessAcquisitionCreditFacilityFeesAfterTax	0	USD
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CY2018	ci	Effective Income Tax Rate Reconciliation Tax Reform EffectiveIncomeTaxRateReconciliationTaxReform	-0.001	pure
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CY2018	ci	Realized Investment Losses Commercial Mortgage Loans Real Estate Entities Certain Equity Securities RealizedInvestmentLossesCommercialMortgageLoansRealEstateEntitiesCertainEquitySecurities		USD
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CY2017	ci	Income Tax Reconciliation Tax Reform IncomeTaxReconciliationTaxReform	232000000	USD
CY2016	ci	Income Tax Reconciliation Tax Reform IncomeTaxReconciliationTaxReform	0	USD

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$CI
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2019 Q1 Form 10-K Financial Statement

#000104746919000792 Filed on February 28, 2019

Income Statement

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Facts In Submission

Files In Submission

$CI Cigna Group Stock $ci

2019 Q1 Form 10-K Financial Statement

#000104746919000792 Filed on February 28, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CI
Cigna Group Stock $ci