$DGX
Quest Diagnostics Inc Stock $dgx

$dgx Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000102207920000017 Filed on February 20, 2020

Income Statement

Concept	2018 Q4	2018 Q3	2018 Q2
Revenue	$1.839B	$1.889B	$1.919B
YoY Change	-1.39%	1.78%	2.95%
Cost Of Revenue	$1.215B	$1.222B	$1.243B
YoY Change	2.97%	2.69%	6.24%
Gross Profit	$604.0M	$667.0M	$676.0M
YoY Change	-9.99%	0.15%	-2.59%
Gross Profit Margin	32.84%	35.31%	35.23%
Selling, General & Admin	$329.0M	$354.0M	$351.0M
YoY Change	-7.06%	1.72%	-1.96%
% of Gross Profit	54.47%	53.07%	51.92%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$81.00M	$77.00M	$77.00M
YoY Change	10.96%	11.59%	16.67%
% of Gross Profit	13.41%	11.54%	11.39%
Operating Expenses	$353.0M	$354.0M	$351.0M
YoY Change	-5.61%	1.72%	-1.96%
Operating Profit	$251.0M	$304.0M	$305.0M
YoY Change	-15.49%	2.01%	-4.39%
Interest Expense	-$43.00M	$42.00M	$43.00M
YoY Change	10.26%	7.69%	13.16%
% of Operating Profit	-17.13%	13.82%	14.1%
Other Income/Expense, Net	-$10.00M	-$38.00M	-$41.00M
YoY Change	-350.0%	-5.0%	51.85%
Pretax Income	$167.0M	$266.0M	$264.0M
YoY Change	-28.63%	3.1%	-9.59%
Income Tax	$39.00M	$48.00M	$42.00M
% Of Pretax Income	23.35%	18.05%	15.91%
Net Earnings	$127.0M	$213.0M	$219.0M
YoY Change	-50.0%	32.3%	13.47%
Net Earnings / Revenue	6.91%	11.28%	11.41%
Basic Earnings Per Share	$0.93	$1.56	$1.60
Diluted Earnings Per Share	$0.92	$1.53	$1.57
COMMON SHARES
Basic Shares Outstanding	136.1M shares	136.0M shares	136.0M shares
Diluted Shares Outstanding		139.0M shares	139.0M shares

Balance Sheet

Concept	2018 Q4	2018 Q3	2018 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$135.0M	$263.0M	$132.0M
YoY Change	-1.46%	-24.86%	-57.96%
Cash & Equivalents	$135.0M	$263.0M	$132.0M
Short-Term Investments
Other Short-Term Assets	$144.0M	$148.0M	$137.0M
YoY Change	-4.0%	10.45%	-12.18%
Inventory	$99.00M	$95.00M	$91.00M
Prepaid Expenses
Receivables	$1.012B	$1.097B	$1.055B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.390B	$1.603B	$1.415B
YoY Change	6.43%	3.82%	-5.67%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.288B	$1.194B	$1.168B
YoY Change	12.49%	8.84%	11.77%
Goodwill	$6.563B	$6.447B	$6.414B
YoY Change	3.6%	4.59%	5.49%
Intangibles	$1.207B	$1.168B	$1.166B
YoY Change	7.86%	13.51%	22.87%
Long-Term Investments	$436.0M	$456.0M	$456.0M
YoY Change	-5.63%	-0.65%	1.11%
Other Assets	$119.0M	$118.0M	$128.0M
YoY Change	-12.5%	-19.18%	-12.33%
Total Long-Term Assets	$9.613B	$9.383B	$9.332B
YoY Change	4.52%	5.49%	7.62%
TOTAL ASSETS
Total Short-Term Assets	$1.390B	$1.603B	$1.415B
Total Long-Term Assets	$9.613B	$9.383B	$9.332B
Total Assets	$11.00B	$10.99B	$10.75B
YoY Change	4.76%	5.24%	5.66%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.021B	$1.085B	$957.0M
YoY Change	0.0%	3.63%	4.93%
Accrued Expenses	$274.0M
YoY Change	11.38%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$464.0M	$304.0M	$305.0M
YoY Change	1188.89%	5980.0%	6000.0%
Total Short-Term Liabilities	$1.485B	$1.389B	$1.262B
YoY Change	40.49%	32.03%	37.62%
LONG-TERM LIABILITIES
Long-Term Debt	$3.429B	$3.394B	$3.408B
YoY Change	-8.51%	-9.71%	-8.68%
Other Long-Term Liabilities	$745.0M	$761.0M	$738.0M
YoY Change	12.37%	5.4%	4.09%
Total Long-Term Liabilities	$4.174B	$761.0M	$738.0M
YoY Change	-5.37%	5.4%	4.09%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.485B	$1.389B	$1.262B
Total Long-Term Liabilities	$4.174B	$761.0M	$738.0M
Total Liabilities	$5.659B	$2.150B	$2.000B
YoY Change	3.49%	21.2%	23.0%
SHAREHOLDERS EQUITY
Retained Earnings	$7.602B	$7.546B	$7.401B
YoY Change	6.5%	8.64%	8.09%
Common Stock	$2.669B	$2.658B	$2.635B
YoY Change	2.1%	2.74%	2.65%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$4.996B	$4.829B	$4.756B
YoY Change	4.45%	2.94%	2.13%
Treasury Stock Shares	82.00M shares	81.00M shares	81.00M shares
Shareholders Equity	$5.216B	$5.317B	$5.223B
YoY Change
Total Liabilities & Shareholders Equity	$11.00B	$10.99B	$10.75B
YoY Change	4.76%	5.24%	5.66%

Cashflow Statement

Concept	2018 Q4	2018 Q3	2018 Q2
OPERATING ACTIVITIES
Net Income	$127.0M	$213.0M	$219.0M
YoY Change	-50.0%	32.3%	13.47%
Depreciation, Depletion And Amortization	$81.00M	$77.00M	$77.00M
YoY Change	10.96%	11.59%	16.67%
Cash From Operating Activities	$295.0M	$402.0M	$323.0M
YoY Change	-8.67%	11.05%	9.86%
INVESTING ACTIVITIES
Capital Expenditures	-$151.0M	-$81.00M	-$78.00M
YoY Change	84.15%	28.57%	20.0%
Acquisitions		$54.00M	$35.00M
YoY Change		-71.12%	-68.47%
Other Investing Activities	-$195.0M	-$44.00M	-$48.00M
YoY Change	-31.34%	-76.09%	-54.29%
Cash From Investing Activities	-$346.0M	-$125.0M	-$126.0M
YoY Change	-5.46%	-49.39%	-25.88%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-77.00M	-146.0M	-189.0M
YoY Change	-54.71%	84.81%	6.78%
NET CHANGE
Cash From Operating Activities	295.0M	402.0M	323.0M
Cash From Investing Activities	-346.0M	-125.0M	-126.0M
Cash From Financing Activities	-77.00M	-146.0M	-189.0M
Net Change In Cash	-128.0M	131.0M	8.000M
YoY Change	-39.91%	263.89%	-115.09%
FREE CASH FLOW
Cash From Operating Activities	$295.0M	$402.0M	$323.0M
Capital Expenditures	-$151.0M	-$81.00M	-$78.00M
Free Cash Flow	$446.0M	$483.0M	$401.0M
YoY Change	10.12%	13.65%	11.7%

Facts In Submission

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CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	858000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	736000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	772000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	6.21
CY2018	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	5.39
CY2017	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	5.63
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.15
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.36
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.39
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.63
CY2019	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	6.13
CY2018	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	5.29
CY2017	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	5.50
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.15
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.28
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.29
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.50
CY2019	us-gaap	Profit Loss ProfitLoss	906000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	788000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	824000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	7000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-11000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	20000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	8000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	3000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	5000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	2000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	1000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	20000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-9000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	24000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	926000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	779000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	848000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	48000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	52000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	52000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	878000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	727000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	796000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	906000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	788000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	824000000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	329000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	309000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	270000000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	11000000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	6000000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	8000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	73000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9000000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	56000000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	61000000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	79000000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	70000000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-6000000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-2000000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	39000000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-6000000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	8000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	63000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	65000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-9000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	73000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-19000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-8000000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	29000000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	4000000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	16000000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	4000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-31000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	26000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1243000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1200000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1175000000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	58000000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	421000000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	581000000	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2018	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	2000000	USD
CY2017	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	1000000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	91000000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	2000000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	400000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	383000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	252000000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	44000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-411000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-801000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-830000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	2281000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	2090000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	205000000	USD
CY2019	us-gaap	Repayments Of Debt RepaymentsOfDebt	1449000000	USD
CY2018	us-gaap	Repayments Of Debt RepaymentsOfDebt	1966000000	USD
CY2017	us-gaap	Repayments Of Debt RepaymentsOfDebt	182000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	353000000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	322000000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	465000000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	119000000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	99000000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	130000000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	16000000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	21000000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	23000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	286000000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	266000000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	247000000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	54000000	USD
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	54000000	USD
CY2017	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	51000000	USD
CY2018	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	16000000	USD
CY2017	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	4000000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-17000000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	23000000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	37000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	225000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-401000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-592000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	1057000000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-2000000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-247000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	135000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	137000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	384000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1192000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	135000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	137000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1192000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	135000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	137000000	USD
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	0	USD
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	0	USD
CY2017Q4	us-gaap	Restricted Cash RestrictedCash	0	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1192000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	135000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	137000000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4660000000	USD
CY2016Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	77000000	USD
CY2017	dgx	Net Income Loss Including Portion Attributableto Noncontrolling Interest Excluding Redeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributabletoNoncontrollingInterestExcludingRedeemableNoncontrollingInterest	817000000	USD
CY2017	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	7000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	24000000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	247000000	USD
CY2017	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	47000000	USD
CY2017	dgx	Temporaryequity Noncontrollinginterest Decreasefrom Distributionsto Noncontrolling Interest Holders TemporaryequityNoncontrollinginterestDecreasefromDistributionstoNoncontrollingInterestHolders	4000000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	23000000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	79000000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	130000000	USD
CY2017	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	23000000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	465000000	USD
CY2017	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	4000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4955000000	USD
CY2017Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	80000000	USD
CY2018	dgx	Net Income Loss Including Portion Attributableto Noncontrolling Interest Excluding Redeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributabletoNoncontrollingInterestExcludingRedeemableNoncontrollingInterest	781000000	USD
CY2018	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	7000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-9000000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	274000000	USD
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	44000000	USD
CY2018	dgx	Temporaryequity Noncontrollinginterest Decreasefrom Distributionsto Noncontrolling Interest Holders TemporaryequityNoncontrollinginterestDecreasefromDistributionstoNoncontrollingInterestHolders	10000000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	28000000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	61000000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	99000000	USD
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	21000000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	325000000	USD
CY2018	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	16000000	USD
CY2018	dgx	Tax Cutsand Jobs Actof2017 Reclassificationof Stranded Tax Effectsfrom Aoc Ito Retained Earnings TaxCutsandJobsActof2017ReclassificationofStrandedTaxEffectsfromAOCItoRetainedEarnings	0	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5267000000	USD
CY2018Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	77000000	USD
CY2019	dgx	Net Income Loss Including Portion Attributableto Noncontrolling Interest Excluding Redeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributabletoNoncontrollingInterestExcludingRedeemableNoncontrollingInterest	900000000	USD
CY2019	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	6000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	20000000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	286000000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	47000000	USD
CY2019	dgx	Temporaryequity Noncontrollinginterest Decreasefrom Distributionsto Noncontrolling Interest Holders TemporaryequityNoncontrollinginterestDecreasefromDistributionstoNoncontrollingInterestHolders	7000000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	24000000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	56000000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	119000000	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	16000000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	350000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5687000000	USD
CY2019Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	76000000	USD
CY2019	us-gaap	Nature Of Operations NatureOfOperations	DESCRIPTION OF BUSINESS<div style="line-height:120%;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;"> </span></div><div style="line-height:120%;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;"/><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Background</span></div><div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div><div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Quest Diagnostics Incorporated and its subsidiaries ("Quest Diagnostics" or the "Company") empower people to take action to improve health outcomes. The Company uses its extensive database of clinical lab results to derive diagnostic insights that reveal new avenues to identify and treat disease, inspire healthy behaviors and improve healthcare management. The Company's diagnostic information services business ("DIS") provides information and insights based on the industry-leading menu of routine, non-routine and advanced clinical testing and anatomic pathology testing, and other diagnostic information services. The Company provides services to a broad range of customers, including patients, clinicians, hospitals, independent delivery networks ("IDNs"), health plans, employers and accountable care organizations ("ACOs"). The Company offers the broadest access in the United States to diagnostic information services through its nationwide network of laboratories, patient service centers and phlebotomists in physician offices and the Company's connectivity resources, including call centers and mobile paramedics, nurses and other health and wellness professionals. The Company is the world's leading provider of diagnostic information services. The Company provides interpretive consultation with one of the largest medical and scientific staffs in the industry and hundreds of M.D.s and Ph.Ds, many of whom are recognized leaders in their fields. The Company's Diagnostic Solutions businesses ("DS") are the leading provider of risk assessment services for the life insurance industry and offer healthcare organizations and clinicians robust information technology solutions.</span></div>
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Certain amounts in the prior period financial statements have been reclassified to conform to the presentation of the current period financial statements. </span></div>
CY2019	us-gaap	Use Of Estimates UseOfEstimates	The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	500000000	USD
CY2019Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	550000000	USD
CY2019Q1	us-gaap	Accrued Rent Current And Noncurrent AccruedRentCurrentAndNoncurrent	50000000	USD
CY2019Q4	dgx	Percentageof Receivables Due From Patients PercentageofReceivablesDueFromPatients	0.20
CY2018Q4	dgx	Changeinestimate Revenueand Receivables ChangeinestimateRevenueandReceivables	35000000	USD
CY2019	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	10000000	USD
CY2018	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-2000000	USD
CY2017	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	8000000	USD
CY2019	dgx	Investmentwithout Readily Determinable Fair Value Impairment InvestmentwithoutReadilyDeterminableFairValueImpairment	0	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	25000000	USD
CY2018Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	10000000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	12000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	0	USD
CY2019	dgx	Percentageof Net Revenues PercentageofNetRevenues	1
CY2018	dgx	Percentageof Net Revenues PercentageofNetRevenues	1
CY2017	dgx	Percentageof Net Revenues PercentageofNetRevenues	1
CY2019Q4	dgx	Percentageof Net Accounts Receivable PercentageofNetAccountsReceivable	1
CY2018Q4	dgx	Percentageof Net Accounts Receivable PercentageofNetAccountsReceivable	1
CY2019	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	838000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	736000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	772000000	USD
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	20000000	USD
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	858000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	736000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	772000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	838000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	736000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	772000000	USD
CY2019	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	3000000	USD
CY2018	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	3000000	USD
CY2017	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	3000000	USD
CY2019	us-gaap	Net Income Loss From Continuing Operations Available To Common Shareholders Basic NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic	835000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	733000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	769000000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	134000000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	136000000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	137000000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3000000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3000000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	136000000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	139000000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	140000000	shares
CY2019	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	6.21
CY2018	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	5.39
CY2017	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	5.63
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.15
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.36
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.39
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.63
CY2019	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	6.13
CY2018	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	5.29
CY2017	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	5.50
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.15
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.28
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.29
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.50
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3000000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2000000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2000000	shares
CY2018	us-gaap	Restructuring Charges RestructuringCharges	49000000	USD
CY2018	us-gaap	Payments For Restructuring PaymentsForRestructuring	33000000	USD
CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	22000000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	38000000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	-3000000	USD
CY2019	us-gaap	Payments For Restructuring PaymentsForRestructuring	25000000	USD
CY2019	us-gaap	Restructuring Reserve Period Increase Decrease RestructuringReservePeriodIncreaseDecrease	-1000000	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	9000000	USD
CY2019	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	63000000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	43000000	USD
CY2019	dgx	Business Acquisition Goodwill Expected Tax Deductible Amount1 BusinessAcquisitionGoodwillExpectedTaxDeductibleAmount1	36000000	USD
CY2019	dgx	Business Combination Recognized Identifiable Assets Acquiredand Liabilities Assumed Finite Lived Intangibles1 BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFiniteLivedIntangibles1	21000000	USD
CY2018	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	440000000	USD
CY2018	dgx	Goodwill Relatedto Prior Period Acquisitions Including Purchase Accounting Adjustments Recorded During Current Period GoodwillRelatedtoPriorPeriodAcquisitionsIncludingPurchaseAccountingAdjustmentsRecordedDuringCurrentPeriod	241000000	USD
CY2018	dgx	Business Acquisition Goodwill Expected Tax Deductible Amount1 BusinessAcquisitionGoodwillExpectedTaxDeductibleAmount1	205000000	USD
CY2018	dgx	Business Combination Recognized Identifiable Assets Acquiredand Liabilities Assumed Finite Lived Intangibles1 BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFiniteLivedIntangibles1	167000000	USD
CY2018	dgx	Business Acquisition Postacquisition Revenue BusinessAcquisitionPostacquisitionRevenue	84000000	USD
CY2017	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	587000000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	335000000	USD
CY2017	dgx	Business Acquisition Goodwill Expected Tax Deductible Amount1 BusinessAcquisitionGoodwillExpectedTaxDeductibleAmount1	273000000	USD
CY2017	dgx	Business Combination Recognized Identifiable Assets Acquiredand Liabilities Assumed Finite Lived Intangibles1 BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFiniteLivedIntangibles1	242000000	USD
CY2019Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	5100000000	USD
CY2018Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	4000000000.0	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1100000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	900000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1000000000.0	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	15000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-1000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-7000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	176000000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	82000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	226000000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	53000000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	26000000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5000000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	3000000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1000000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1000000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	21000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	66000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-20000000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-4000000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	10000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	27000000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-2000000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-3000000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	2000000	USD
CY2017	dgx	Effective Income Tax Rate Reconciliation Changeforuncertaintaxpositionnetbenefitmainlyassociatedwithlapseofstatueoflimitations EffectiveIncomeTaxRateReconciliationChangeforuncertaintaxpositionnetbenefitmainlyassociatedwithlapseofstatueoflimitations	0.016
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.011
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.004
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	247000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	182000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	241000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.006
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.005
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.230
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.197
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.046
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.047
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.038
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.001
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	-0.011
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	-0.014
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	-0.019
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.012
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.019
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.036
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	-0.014
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	-0.014
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	-0.020
CY2019	dgx	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rateand Repatriationof Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateandRepatriationofForeignEarningsPercent	0
CY2018	dgx	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rateand Repatriationof Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateandRepatriationofForeignEarningsPercent	0.001
CY2017	dgx	Effective Income Tax Rate Reconciliation Changein Enacted Tax Rateand Repatriationof Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateandRepatriationofForeignEarningsPercent	-0.104
CY2019	dgx	Effective Income Tax Rate Reconciliation Changein Accounting Method EffectiveIncomeTaxRateReconciliationChangeinAccountingMethod	0
CY2018	dgx	Effective Income Tax Rate Reconciliation Changein Accounting Method EffectiveIncomeTaxRateReconciliationChangeinAccountingMethod	-0.016
CY2017	dgx	Effective Income Tax Rate Reconciliation Changein Accounting Method EffectiveIncomeTaxRateReconciliationChangeinAccountingMethod	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0.011
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0.010
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0.011
CY2019	dgx	Effective Income Tax Rate Reconciliation Changeforuncertaintaxpositionnetbenefitmainlyassociatedwithlapseofstatueoflimitations EffectiveIncomeTaxRateReconciliationChangeforuncertaintaxpositionnetbenefitmainlyassociatedwithlapseofstatueoflimitations	0.017
CY2018	dgx	Effective Income Tax Rate Reconciliation Changeforuncertaintaxpositionnetbenefitmainlyassociatedwithlapseofstatueoflimitations EffectiveIncomeTaxRateReconciliationChangeforuncertaintaxpositionnetbenefitmainlyassociatedwithlapseofstatueoflimitations	-0.008
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.234
CY2019	dgx	Income Tax Expense Benefit Dueto Releaseof Valuation Allowance Associated With Net Operating Loss Carryforwards IncomeTaxExpenseBenefitDuetoReleaseofValuationAllowanceAssociatedWithNetOperatingLossCarryforwards	12000000	USD
CY2018	dgx	Income Tax Benefit Associatedwith Changesin Tax Return Accounting Method IncomeTaxBenefitAssociatedwithChangesinTaxReturnAccountingMethod	15000000	USD
CY2019Q4	dgx	Deferred Tax Assets Tax Deferred Expense Reservesand Accruals Accounts Receivables DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsAccountsReceivables	64000000	USD
CY2018Q4	dgx	Deferred Tax Assets Tax Deferred Expense Reservesand Accruals Accounts Receivables DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsAccountsReceivables	66000000	USD
CY2019Q4	dgx	Liabilities Not Currently Deductible Non Current Dta LiabilitiesNotCurrentlyDeductibleNonCurrentDta	126000000	USD
CY2018Q4	dgx	Liabilities Not Currently Deductible Non Current Dta LiabilitiesNotCurrentlyDeductibleNonCurrentDta	137000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	35000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	38000000	USD
CY2019Q4	dgx	Deferred Tax Liability Investments Investmentsin Subsidiariesand Equitymethodinvestments DeferredTaxLiabilityInvestmentsInvestmentsinSubsidiariesandEquitymethodinvestments	80000000	USD
CY2018Q4	dgx	Deferred Tax Liability Investments Investmentsin Subsidiariesand Equitymethodinvestments DeferredTaxLiabilityInvestmentsInvestmentsinSubsidiariesandEquitymethodinvestments	80000000	USD
CY2019Q4	dgx	Net Operating Loss Carryfowards Net Of Valuation Allowance NetOperatingLossCarryfowardsNetOfValuationAllowance	75000000	USD
CY2018Q4	dgx	Net Operating Loss Carryfowards Net Of Valuation Allowance NetOperatingLossCarryfowardsNetOfValuationAllowance	80000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	484000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	484000000	USD
CY2019Q4	dgx	Noncurrent Deferred Tax Assets Liabilities Net NoncurrentDeferredTaxAssetsLiabilitiesNet	-264000000	USD
CY2018Q4	dgx	Noncurrent Deferred Tax Assets Liabilities Net NoncurrentDeferredTaxAssetsLiabilitiesNet	-243000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	264000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	243000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	101000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	126000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	26000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	46000000	USD
CY2019Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	113000000	USD
CY2018Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	85000000	USD
CY2019Q4	us-gaap	Prepaid Taxes PrepaidTaxes	3000000	USD
CY2018Q4	us-gaap	Prepaid Taxes PrepaidTaxes	14000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	107000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	115000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	98000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	5000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	16000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	11000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	23000000	USD
CY2019	dgx	Reductions For Changes In Judgment ReductionsForChangesInJudgment	3000000	USD
CY2018	dgx	Reductions For Changes In Judgment ReductionsForChangesInJudgment	6000000	USD
CY2017	dgx	Reductions For Changes In Judgment ReductionsForChangesInJudgment	2000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	15000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	6000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	32000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	3000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	88000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	107000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	115000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	72000000	USD
CY2019Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	10000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	5000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	1000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	1000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	17000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	14000000	USD
CY2019	us-gaap	Depreciation Depreciation	233000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	153000000	USD
CY2019	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	5000000	USD
CY2018	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2000000	USD
CY2017	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2000000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-175000000	USD
CY2018	us-gaap	Depreciation Depreciation	219000000	USD
CY2017	us-gaap	Depreciation Depreciation	196000000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	329000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	309000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	270000000	USD
CY2019	us-gaap	Interest Expense InterestExpense	180000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	169000000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-167000000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-151000000	USD
CY2019	us-gaap	Interest Paid InterestPaid	192000000	USD
CY2018	us-gaap	Interest Paid InterestPaid	174000000	USD
CY2017	us-gaap	Interest Paid InterestPaid	159000000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	202000000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	84000000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	243000000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	26000000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	11000000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	26000000	USD
CY2019Q4	dgx	Treasury Stock Purchasedbut Notyet Paid TreasuryStockPurchasedbutNotyetPaid	0	USD
CY2018Q4	dgx	Treasury Stock Purchasedbut Notyet Paid TreasuryStockPurchasedbutNotyetPaid	3000000	USD
CY2017Q4	dgx	Treasury Stock Purchasedbut Notyet Paid TreasuryStockPurchasedbutNotyetPaid	0	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	71000000	USD
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	71000000	USD
CY2017Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	61000000	USD
CY2019	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	63000000	USD
CY2018	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	453000000	USD
CY2017	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	657000000	USD
CY2019	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0	USD
CY2018	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	7000000	USD
CY2017	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	58000000	USD
CY2019	dgx	Fair Value Of Net Assets Acquired FairValueOfNetAssetsAcquired	63000000	USD
CY2018	dgx	Fair Value Of Net Assets Acquired FairValueOfNetAssetsAcquired	446000000	USD
CY2017	dgx	Fair Value Of Net Assets Acquired FairValueOfNetAssetsAcquired	599000000	USD
CY2019	dgx	Mergerconsiderationpaidpayablenet Mergerconsiderationpaidpayablenet	-5000000	USD
CY2018	dgx	Mergerconsiderationpaidpayablenet Mergerconsiderationpaidpayablenet	-19000000	USD
CY2017	dgx	Mergerconsiderationpaidpayablenet Mergerconsiderationpaidpayablenet	-6000000	USD
CY2019	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	58000000	USD
CY2018	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	427000000	USD
CY2017	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	593000000	USD
CY2018	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	6000000	USD
CY2017	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	12000000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	58000000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	421000000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	581000000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	180000000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	3000000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	4000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	164000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1000000	USD
CY2018	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	1000000	USD
CY2017	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	7000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4229000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3970000000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2776000000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2682000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1453000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1288000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	6563000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	6335000000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	43000000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	228000000	USD
CY2019	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	13000000	USD
CY2018	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	0	USD
CY2019Q4	us-gaap	Goodwill Goodwill	6619000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	6563000000	USD
CY2019Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	1820000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	699000000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1121000000	USD
CY2018Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	1812000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	605000000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1207000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	96000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	90000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	87000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	85000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	82000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	445000000	USD
CY2019Q4	dgx	Finite Lived Intangible Assets Estimated Amortization Expense Total FiniteLivedIntangibleAssetsEstimatedAmortizationExpenseTotal	885000000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	287000000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	249000000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	223000000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	274000000	USD
CY2019Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	263000000	USD
CY2018Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	222000000	USD
CY2019Q4	us-gaap	Bank Overdrafts BankOverdrafts	88000000	USD
CY2018Q4	us-gaap	Bank Overdrafts BankOverdrafts	98000000	USD
CY2019Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	71000000	USD
CY2018Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	71000000	USD
CY2019Q4	us-gaap	Interest Payable Current InterestPayableCurrent	45000000	USD
CY2018Q4	us-gaap	Interest Payable Current InterestPayableCurrent	47000000	USD
CY2019Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	30000000	USD
CY2018Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	29000000	USD
CY2019Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	27000000	USD
CY2018Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	17000000	USD
CY2019Q4	dgx	Merger Consideration Payable Current MergerConsiderationPayableCurrent	7000000	USD
CY2018Q4	dgx	Merger Consideration Payable Current MergerConsiderationPayableCurrent	14000000	USD
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	1041000000	USD
CY2018Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	1021000000	USD
CY2019Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	26000000	USD
CY2018Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	17000000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	4770000000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	3893000000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	804000000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	464000000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	3966000000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	3429000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	803000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	553000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	3000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	302000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	3147000000	USD
CY2019Q4	dgx	Long Term Debt Maturities Gross LongTermDebtMaturitiesGross	4809000000	USD
CY2019Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	10000000	USD
CY2019Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	26000000	USD
CY2019Q4	dgx	Debt Instrument Fair Value Basis Adjustment Attributable To Hedged Debt DebtInstrumentFairValueBasisAdjustmentAttributableToHedgedDebt	3000000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	4770000000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	804000000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	3966000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	518000000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	35000000	USD
CY2019Q4	dgx	Lease Rightof Use Asset LeaseRightofUseAsset	553000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	145000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	3000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	413000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	30000000	USD
CY2019Q4	dgx	Lease Liability LeaseLiability	591000000	USD
CY2019Q4	dgx	Finance Lease Rightof Use Asset Accumulated Amortization FinanceLeaseRightofUseAssetAccumulatedAmortization	24000000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	294000000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	7000000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	3000000	USD
CY2019	us-gaap	Lease Cost LeaseCost	304000000	USD
CY2019	dgx	Shortterm Leaseand Variable Lease Cost ShorttermLeaseandVariableLeaseCost	120000000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	220000000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	219000000	USD
CY2019Q4	dgx	Operatingand Finance Lease Liability OperatingandFinanceLeaseLiability	591000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	151000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	6000000	USD
CY2019Q4	dgx	Lessee Operatingand Finance Lease Liability Payments Due Next Twelve Months LesseeOperatingandFinanceLeaseLiabilityPaymentsDueNextTwelveMonths	157000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	129000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	6000000	USD
CY2019Q4	dgx	Lessee Operatingand Finance Lease Liability Payments Due Year Two LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearTwo	135000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	102000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	5000000	USD
CY2019Q4	dgx	Lessee Operatingand Finance Lease Liability Payments Due Year Three LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearThree	107000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	82000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	3000000	USD
CY2019Q4	dgx	Lessee Operatingand Finance Lease Liability Payments Due Year Four LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearFour	85000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	52000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	3000000	USD
CY2019Q4	dgx	Lessee Operatingand Finance Lease Liability Payments Due Year Five LesseeOperatingandFinanceLeaseLiabilityPaymentsDueYearFive	55000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	105000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	31000000	USD
CY2019Q4	dgx	Lessee Operatingand Finance Lease Liability Payments Dueafter Year Five LesseeOperatingandFinanceLeaseLiabilityPaymentsDueafterYearFive	136000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	621000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	54000000	USD
CY2019Q4	dgx	Lessee Operatingand Finance Lease Liability Payments Due LesseeOperatingandFinanceLeaseLiabilityPaymentsDue	675000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	63000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	21000000	USD
CY2019Q4	dgx	Lessee Operatingand Finance Lease Liability Undiscounted Excess Amount LesseeOperatingandFinanceLeaseLiabilityUndiscountedExcessAmount	84000000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	558000000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	33000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	181000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	143000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	106000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	79000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	60000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	122000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	691000000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P12Y
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.034
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.087
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	79000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	27000000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	33000000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	67000000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	20000000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-8000000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	16000000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.198
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.024
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.019
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.019
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.025
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1.00
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2006Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2006Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2006Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	600000000	shares
CY2019Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.53
CY2018Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.50
CY2018Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.53
CY2017Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.45
CY2019Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.53
CY2019Q4	dgx	Stock Repurchase Program Additional Authorized Amount StockRepurchaseProgramAdditionalAuthorizedAmount	1000000000	USD
CY2019Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	1200000000	USD
CY2019	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	2000000	shares
CY2018	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	3000000	shares
CY2017	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	2000000	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2019	dgx	Sharebasedcompensationexcesstaxbenefitamount Sharebasedcompensationexcesstaxbenefitamount	13000000	USD
CY2018	dgx	Sharebasedcompensationexcesstaxbenefitamount Sharebasedcompensationexcesstaxbenefitamount	18000000	USD
CY2017	dgx	Sharebasedcompensationexcesstaxbenefitamount Sharebasedcompensationexcesstaxbenefitamount	37000000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	84000000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	14.30
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	18.14
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	15.98
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.204
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.191
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.028
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.021
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y2M12D
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y3M18D
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y2M12D
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	56000000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	61000000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	78000000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	76000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	210000000	USD
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	83000000	USD
CY2019Q4	dgx	Unrecorded Unconditional Purchase Obligation Duewithin Twoand Three Years UnrecordedUnconditionalPurchaseObligationDuewithinTwoandThreeYears	91000000	USD
CY2019	dgx	Remaining Termsof Contingent Lease Obligations Maximum RemainingTermsofContingentLeaseObligationsMaximum	P28Y
CY2019Q4	us-gaap	Litigation Reserve LitigationReserve	1000000	USD
CY2019Q4	us-gaap	Malpractice Loss Contingency Accrual Undiscounted MalpracticeLossContingencyAccrualUndiscounted	132000000	USD
CY2018Q4	us-gaap	Malpractice Loss Contingency Accrual Undiscounted MalpracticeLossContingencyAccrualUndiscounted	125000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	7726000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	7531000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	7402000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	1231000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	1101000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	1165000000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-155000000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-175000000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-135000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1076000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	926000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1030000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	247000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	182000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	241000000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	57000000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	44000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	35000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	886000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	788000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	824000000	USD
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	20000000	USD
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2019	us-gaap	Profit Loss ProfitLoss	906000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	788000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	824000000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	48000000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	52000000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	52000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	858000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	736000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	772000000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	329000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	309000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	270000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	400000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	383000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	252000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	7726000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	7531000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	7402000000	USD
CY2018	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	10000000	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1891000000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1953000000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1956000000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1926000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	7726000000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	647000000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	688000000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	692000000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	662000000	USD
CY2019	us-gaap	Gross Profit GrossProfit	2689000000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	176000000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	219000000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	226000000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	265000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	886000000	USD
CY2019Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2019Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	20000000	USD
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2019Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	20000000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	176000000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	239000000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	226000000	USD
CY2019Q4	us-gaap	Profit Loss ProfitLoss	265000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	906000000	USD
CY2019Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	12000000	USD
CY2019Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	13000000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	11000000	USD
CY2019Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	12000000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	48000000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	164000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	226000000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	215000000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	253000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	858000000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.22
CY2019Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.52
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.59
CY2019Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.88
CY2019	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	6.21
CY2019Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2019Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.15
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2019Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.15
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.22
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.67
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.59
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.88
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.36
CY2019Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.20
CY2019Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.51
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.56
CY2019Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.86
CY2019	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	6.13
CY2019Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2019Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.15
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2019Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.15
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.20
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.66
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.56
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.86
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.28
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1884000000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1919000000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1889000000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1839000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	7531000000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	658000000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	676000000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	667000000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	604000000	USD
CY2018	us-gaap	Gross Profit GrossProfit	2605000000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	189000000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	233000000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	227000000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	139000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	788000000	USD
CY2018Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2018Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2018Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2018Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2018Q1	us-gaap	Profit Loss ProfitLoss	189000000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	233000000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	227000000	USD
CY2018Q4	us-gaap	Profit Loss ProfitLoss	139000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	788000000	USD
CY2018Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	12000000	USD
CY2018Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14000000	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14000000	USD
CY2018Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	12000000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	52000000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	177000000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	219000000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	213000000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	127000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	736000000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.30
CY2018Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.60
CY2018Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.56
CY2018Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.93
CY2018	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	5.39
CY2018Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2018Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2018Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2018Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.30
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.60
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.56
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.93
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.39
CY2018Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.27
CY2018Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.57
CY2018Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.53
CY2018Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.92
CY2018	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	5.29
CY2018Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2018Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2018Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2018Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.27
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.57
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.53
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.92
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.29
CY2018Q4	dgx	Changeinestimate Revenueand Receivables ChangeinestimateRevenueandReceivables	35000000	USD
CY2019Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	29000000	USD
CY2019Q1	dgx	Restructuring Integration Charges RestructuringIntegrationCharges	22000000	USD
CY2019Q1	dgx	Gainassociatedwithinsuranceclaimpartiallyoffsetbynoncashassetimpairmentcharge Gainassociatedwithinsuranceclaimpartiallyoffsetbynoncashassetimpairmentcharge	8000000	USD
CY2019Q1	dgx	Sharebasedcompensationexcesstaxbenefitamount Sharebasedcompensationexcesstaxbenefitamount	3000000	USD
CY2019Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	30000000	USD
CY2019Q2	dgx	Restructuring Integration Charges RestructuringIntegrationCharges	26000000	USD
CY2019Q2	dgx	Sharebasedcompensationexcesstaxbenefitamount Sharebasedcompensationexcesstaxbenefitamount	5000000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	25000000	USD
CY2019Q3	dgx	Restructuring Integration Charges RestructuringIntegrationCharges	16000000	USD
CY2019Q3	dgx	Gainassociatedwithcontingentconsiderationaccrualpartiallyoffsetbycostsincurredrelatedtosecurityincident Gainassociatedwithcontingentconsiderationaccrualpartiallyoffsetbycostsincurredrelatedtosecurityincident	3000000	USD
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CY2019Q4	us-gaap	Sale And Leaseback Transaction Gain Loss Net SaleAndLeasebackTransactionGainLossNet	72000000	USD
CY2019Q4	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	27000000	USD
CY2019Q4	dgx	Restructuring Integration Charges RestructuringIntegrationCharges	14000000	USD
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CY2018Q1	dgx	Restructuring Integration Charges RestructuringIntegrationCharges	31000000	USD
CY2018Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	26000000	USD
CY2018Q1	dgx	Sharebasedcompensationexcesstaxbenefitamount Sharebasedcompensationexcesstaxbenefitamount	8000000	USD
CY2018Q2	dgx	Restructuring Integration Charges RestructuringIntegrationCharges	25000000	USD
CY2018Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	26000000	USD
CY2018Q2	dgx	Legal Costsand Gain Associatedwith Insurance Claim LegalCostsandGainAssociatedwithInsuranceClaim	10000000	USD
CY2018Q2	dgx	Sharebasedcompensationexcesstaxbenefitamount Sharebasedcompensationexcesstaxbenefitamount	5000000	USD
CY2018Q2	dgx	Income Tax Benefit Associatedwith Changesin Tax Return Accounting Method IncomeTaxBenefitAssociatedwithChangesinTaxReturnAccountingMethod	15000000	USD
CY2018Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	27000000	USD
CY2018Q3	dgx	Restructuring Integration Charges RestructuringIntegrationCharges	19000000	USD
CY2018Q3	dgx	Decreasein Contingent Considerationand Noncash Impairment DecreaseinContingentConsiderationandNoncashImpairment	12000000	USD
CY2018Q3	dgx	Sharebasedcompensationexcesstaxbenefitamount Sharebasedcompensationexcesstaxbenefitamount	4000000	USD
CY2018Q4	dgx	Restructuring Integration Charges RestructuringIntegrationCharges	47000000	USD
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CY2018Q4	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	-4000000	USD
CY2018Q4	us-gaap	Tax Cuts And Jobs Act Of2017 Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit	1000000	USD
CY2018Q4	dgx	Sharebasedcompensationexcesstaxbenefitamount Sharebasedcompensationexcesstaxbenefitamount	1000000	USD

Files In Submission

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$DGX
Quest Diagnostics Inc Stock $dgx

2018 Q4 Form 10-K Financial Statement

#000102207920000017 Filed on February 20, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DGX Quest Diagnostics Inc Stock $dgx

2018 Q4 Form 10-K Financial Statement

#000102207920000017 Filed on February 20, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DGX
Quest Diagnostics Inc Stock $dgx