$MMC
MARSH & MCLENNAN COMPANIES, INC. Stock $mmc

$mmc Overview Financials Valuation SEC Filings Company Website

2018 Q2 Form 10-Q Financial Statement

#000006270918000032 Filed on July 27, 2018

Income Statement

Concept	2018 Q2	2017 Q2
Revenue	$3.734B	$3.495B
YoY Change	6.84%	3.52%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$2.135B	$1.998B
YoY Change	6.86%	6.73%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$122.0M	$116.0M
YoY Change	5.17%	5.45%
% of Gross Profit
Operating Expenses	$3.043B	$2.794B
YoY Change	8.91%	5.43%
Operating Profit	$691.0M	$701.0M
YoY Change	-1.43%	6.05%
Interest Expense	$68.00M	$60.00M
YoY Change	13.33%	25.0%
% of Operating Profit	9.84%	8.56%
Other Income/Expense, Net	$65.00M	$63.00M
YoY Change	3.17%
Pretax Income	$719.0M	$711.0M
YoY Change	1.13%	4.41%
Income Tax	$183.0M	$204.0M
% Of Pretax Income	25.45%	28.69%
Net Earnings	$531.0M	$501.0M
YoY Change	5.99%	6.14%
Net Earnings / Revenue	14.22%	14.33%
Basic Earnings Per Share	$1.05	$0.98
Diluted Earnings Per Share	$1.04	$0.96
COMMON SHARES
Basic Shares Outstanding	507.0M shares	514.0M shares
Diluted Shares Outstanding	512.0M shares	520.0M shares

Balance Sheet

Concept	2018 Q2	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.036B	$966.0M
YoY Change	7.25%	-0.82%
Cash & Equivalents	$1.036B	$966.0M
Short-Term Investments
Other Short-Term Assets	$538.0M	$232.0M
YoY Change	131.9%	-1.28%
Inventory
Prepaid Expenses
Receivables	$4.601B	$3.984B
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$6.175B	$5.182B
YoY Change	19.16%	5.11%
LONG-TERM ASSETS
Property, Plant & Equipment	$698.0M	$721.0M
YoY Change	-3.19%	-2.04%
Goodwill	$9.177B	$8.821B
YoY Change	4.04%	11.03%
Intangibles
YoY Change
Long-Term Investments	$391.0M	$416.0M
YoY Change	-6.01%	10.34%
Other Assets	$1.535B	$1.529B
YoY Change	0.39%	25.33%
Total Long-Term Assets	$14.98B	$14.26B
YoY Change	5.08%	8.47%
TOTAL ASSETS
Total Short-Term Assets	$6.175B	$5.182B
Total Long-Term Assets	$14.98B	$14.26B
Total Assets	$21.16B	$19.44B
YoY Change	8.83%	7.56%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.246B	$2.027B
YoY Change	10.8%	8.51%
Accrued Expenses	$1.103B	$1.073B
YoY Change	2.8%	5.71%
Deferred Revenue
YoY Change
Short-Term Debt	$175.0M	$0.00
YoY Change
Long-Term Debt Due	$264.0M	$12.00M
YoY Change	2100.0%	-95.4%
Total Short-Term Liabilities	$4.216B	$3.649B
YoY Change	15.54%	4.14%
LONG-TERM LIABILITIES
Long-Term Debt	$5.813B	$5.479B
YoY Change	6.1%	21.86%
Other Long-Term Liabilities	$1.262B	$949.0M
YoY Change	32.98%	-9.19%
Total Long-Term Liabilities	$1.262B	$949.0M
YoY Change	32.98%	-9.19%
TOTAL LIABILITIES
Total Short-Term Liabilities	$4.216B	$3.649B
Total Long-Term Liabilities	$1.262B	$949.0M
Total Liabilities	$5.478B	$4.598B
YoY Change	19.14%	1.08%
SHAREHOLDERS EQUITY
Retained Earnings	$14.13B	$12.92B
YoY Change	9.42%	9.91%
Common Stock	$1.293B	$1.324B
YoY Change	-2.34%	-1.93%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$3.443B	$2.705B
YoY Change	27.28%	24.31%
Treasury Stock Shares	55.51M shares	47.84M shares
Shareholders Equity	$7.716B	$6.993B
YoY Change
Total Liabilities & Shareholders Equity	$21.16B	$19.44B
YoY Change	8.83%	7.56%

Cashflow Statement

Concept	2018 Q2	2017 Q2
OPERATING ACTIVITIES
Net Income	$531.0M	$501.0M
YoY Change	5.99%	6.14%
Depreciation, Depletion And Amortization	$122.0M	$116.0M
YoY Change	5.17%	5.45%
Cash From Operating Activities	$777.0M	$742.0M
YoY Change	4.72%	-8.4%
INVESTING ACTIVITIES
Capital Expenditures	-$77.00M	-$82.00M
YoY Change	-6.1%	30.16%
Acquisitions
YoY Change
Other Investing Activities	-$132.0M	$5.000M
YoY Change	-2740.0%	-600.0%
Cash From Investing Activities	-$209.0M	-$77.00M
YoY Change	171.43%	20.31%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-526.0M	-681.0M
YoY Change	-22.76%	9.66%
NET CHANGE
Cash From Operating Activities	777.0M	742.0M
Cash From Investing Activities	-209.0M	-77.00M
Cash From Financing Activities	-526.0M	-681.0M
Net Change In Cash	42.00M	-16.00M
YoY Change	-362.5%	-112.8%
FREE CASH FLOW
Cash From Operating Activities	$777.0M	$742.0M
Capital Expenditures	-$77.00M	-$82.00M
Free Cash Flow	$854.0M	$824.0M
YoY Change	3.64%	-5.61%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	mmc	Other Comprehensive Income Loss.Finalizationof Pensionand Other Postretirement Benefit Plan Valuation Effectof Curtailment Tax OtherComprehensiveIncomeLoss.FinalizationofPensionandOtherPostretirementBenefitPlanValuationEffectofCurtailmentTax	0	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
	dei	Document Period End Date DocumentPeriodEndDate	2018-06-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000062709
CY2018Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	504979546	shares
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	MARSH & MCLENNAN COMPANIES, INC.
	dei	Trading Symbol TradingSymbol	MMC
CY2017Q4	mmc	Accrued Feesand Other Revenue Receivable Gross Current AccruedFeesandOtherRevenueReceivableGrossCurrent	3777000000	USD
CY2018Q2	mmc	Accrued Feesand Other Revenue Receivable Gross Current AccruedFeesandOtherRevenueReceivableGrossCurrent	4288000000	USD
CY2017Q4	mmc	Advanced Premiumsand Claims Receivable Gross Current AdvancedPremiumsandClaimsReceivableGrossCurrent	65000000	USD
CY2018Q2	mmc	Advanced Premiumsand Claims Receivable Gross Current AdvancedPremiumsandClaimsReceivableGrossCurrent	62000000	USD
CY2017Q2	mmc	Average Share Price Common Stock AverageSharePriceCommonStock	75.41
	mmc	Average Share Price Common Stock AverageSharePriceCommonStock	73.36
CY2018Q2	mmc	Average Share Price Common Stock AverageSharePriceCommonStock	81.64
	mmc	Average Share Price Common Stock AverageSharePriceCommonStock	82.24
	mmc	Business Combination Consideration Transferred Assets Acquired BusinessCombinationConsiderationTransferredAssetsAcquired	576000000	USD
	mmc	Business Combination Consideration Transferred Assets Acquired BusinessCombinationConsiderationTransferredAssetsAcquired	204000000	USD
	mmc	Business Combination Contingent Consideration Arrangements Changein Amountof Contingent Consideration Liability Excluding Payments BusinessCombinationContingentConsiderationArrangementsChangeinAmountofContingentConsiderationLiabilityExcludingPayments	-11000000	USD
	mmc	Business Combination Contingentand Deferred Consideration BusinessCombinationContingentandDeferredConsideration	90000000	USD
	mmc	Business Combination Contingentand Deferred Consideration BusinessCombinationContingentandDeferredConsideration	32000000	USD
CY2017Q4	mmc	Cashand Investments Heldin Fiduciary Capacity Noncurrent CashandInvestmentsHeldinFiduciaryCapacityNoncurrent	4847000000	USD
CY2018Q2	mmc	Cashand Investments Heldin Fiduciary Capacity Noncurrent CashandInvestmentsHeldinFiduciaryCapacityNoncurrent	5118000000	USD
	mmc	Common Stock Dividends Per Share Cash Declared CommonStockDividendsPerShareCashDeclared	1.06
	mmc	Common Stock Dividends Per Share Cash Declared CommonStockDividendsPerShareCashDeclared	1.165
	mmc	Decreasein Fair Valueof Contingent Consideration Dueto5 Decreasein Projections DecreaseinFairValueofContingentConsiderationDueto5DecreaseinProjections	-23000000	USD
	mmc	Dividend Equivalents Per Share Cash Declared DividendEquivalentsPerShareCashDeclared	1.06
	mmc	Dividend Equivalents Per Share Cash Declared DividendEquivalentsPerShareCashDeclared	1.165
	mmc	Effectof Exchange Rateon Cashand Cash Equivalents Excluding Operating Activities EffectofExchangeRateonCashandCashEquivalentsExcludingOperatingActivities	119000000	USD
	mmc	Effectof Exchange Rateon Cashand Cash Equivalents Excluding Operating Activities EffectofExchangeRateonCashandCashEquivalentsExcludingOperatingActivities	-71000000	USD
	mmc	Effectof Exchange Rateon Cashand Cash Equivalentsfrom Operating Activities EffectofExchangeRateonCashandCashEquivalentsfromOperatingActivities	-29000000	USD
	mmc	Effectof Exchange Rateon Cashand Cash Equivalentsfrom Operating Activities EffectofExchangeRateonCashandCashEquivalentsfromOperatingActivities	-24000000	USD
	mmc	Equity Method Investment Lag Period EquityMethodInvestmentLagPeriod	P3M
CY2017Q4	mmc	Fiduciary Liabilities Gross Noncurrent FiduciaryLiabilitiesGrossNoncurrent	4847000000	USD
CY2018Q2	mmc	Fiduciary Liabilities Gross Noncurrent FiduciaryLiabilitiesGrossNoncurrent	5118000000	USD
CY2017Q4	mmc	Fiduciary Liabilities Net Noncurrent FiduciaryLiabilitiesNetNoncurrent	0	USD
CY2018Q2	mmc	Fiduciary Liabilities Net Noncurrent FiduciaryLiabilitiesNetNoncurrent	0	USD
	mmc	Increase In Fair Value Of Contingent Consideration Due To5 Increase In Projections IncreaseInFairValueOfContingentConsiderationDueTo5IncreaseInProjections	22000000	USD
CY2017Q4	mmc	Liability For Errors And Omissions LiabilityForErrorsAndOmissions	301000000	USD
CY2018Q2	mmc	Liability For Errors And Omissions LiabilityForErrorsAndOmissions	303000000	USD
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	mmc	Other Comprehensive Income Loss Adjustment From Mergerof Pension Plans Pensionand Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossAdjustmentFromMergerofPensionPlansPensionandOtherPostretirementBenefitPlansTax	0	USD
	mmc	Other Comprehensive Income Loss Adjustment From Mergerof Pension Plans Pensionand Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossAdjustmentFromMergerofPensionPlansPensionandOtherPostretirementBenefitPlansTax	0	USD
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CY2017Q4	mmc	Numberof Discrete Charges NumberofDiscreteCharges	2	discrete_charge
CY2017Q4	mmc	Other Accumulated Comprehensive Income Loss Netof Tax OtherAccumulatedComprehensiveIncomeLossNetofTax	0	USD
CY2018Q1	mmc	Other Accumulated Comprehensive Income Loss Netof Tax OtherAccumulatedComprehensiveIncomeLossNetofTax	-14000000	USD
	mmc	Other Comprehensive Income Loss.Finalizationof Pensionand Other Postretirement Benefit Plan Valuation Effectof Curtailment Tax OtherComprehensiveIncomeLoss.FinalizationofPensionandOtherPostretirementBenefitPlanValuationEffectofCurtailmentTax	0	USD
	mmc	Other Comprehensive Income Loss Adjustment From Mergerof Pension Plans Pensionand Other Postretirement Benefit Plans Netof Tax OtherComprehensiveIncomeLossAdjustmentFromMergerofPensionPlansPensionandOtherPostretirementBenefitPlansNetofTax	-1000000	USD
	mmc	Other Comprehensive Income Loss Adjustment From Mergerof Pension Plans Pensionand Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossAdjustmentFromMergerofPensionPlansPensionandPostretirementBenefitPlansBeforeTax	-1000000	USD
	mmc	Other Comprehensive Income Loss Adjustment From Mergerof Pension Plans Pensionand Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossAdjustmentFromMergerofPensionPlansPensionandPostretirementBenefitPlansBeforeTax	0	USD
	mmc	Other Comprehensive Income Loss Finalizationof Pensionand Other Postretirement Benefit Plan Valuation Effectof Curtailment Before Tax OtherComprehensiveIncomeLossFinalizationofPensionandOtherPostretirementBenefitPlanValuationEffectofCurtailmentBeforeTax	-1000000	USD
	mmc	Other Comprehensive Income Loss Finalizationof Pensionand Other Postretirement Benefit Plan Valuation Effectof Curtailment Netof Tax OtherComprehensiveIncomeLossFinalizationofPensionandOtherPostretirementBenefitPlanValuationEffectofCurtailmentNetofTax	-1000000	USD
	mmc	Other Comprehensive Income Loss Finalizationof Pensionand Other Postretirement Benefit Plan Valuation Effectof Curtailment Netof Tax OtherComprehensiveIncomeLossFinalizationofPensionandOtherPostretirementBenefitPlanValuationEffectofCurtailmentNetofTax	0	USD
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	mmc	Other Comprehensive Income Loss Finalizationof Pensionand Other Postretirement Benefit Plan Valuation Effectof Settlement Before Tax OtherComprehensiveIncomeLossFinalizationofPensionandOtherPostretirementBenefitPlanValuationEffectofSettlementBeforeTax	0	USD
	mmc	Other Comprehensive Income Loss Finalizationof Pensionand Other Postretirement Benefit Plan Valuation Effectof Settlement Netof Tax OtherComprehensiveIncomeLossFinalizationofPensionandOtherPostretirementBenefitPlanValuationEffectofSettlementNetofTax	1000000	USD
	mmc	Other Comprehensive Income Loss Finalizationof Pensionand Other Postretirement Benefit Plan Valuation Effectof Settlement Netof Tax OtherComprehensiveIncomeLossFinalizationofPensionandOtherPostretirementBenefitPlanValuationEffectofSettlementNetofTax	0	USD
	mmc	Other Comprehensive Income Loss Finalizationof Pensionand Other Postretirement Benefit Plan Valuation Effectof Settlement Tax OtherComprehensiveIncomeLossFinalizationofPensionandOtherPostretirementBenefitPlanValuationEffectofSettlementTax	0	USD
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CY2017Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Foreign Currency Transactionand Translation Adjustment Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansForeignCurrencyTransactionandTranslationAdjustmentBeforeTax	-47000000	USD
	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Foreign Currency Transactionand Translation Adjustment Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansForeignCurrencyTransactionandTranslationAdjustmentBeforeTax	-62000000	USD
CY2018Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Foreign Currency Transactionand Translation Adjustment Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansForeignCurrencyTransactionandTranslationAdjustmentBeforeTax	156000000	USD
	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Foreign Currency Transactionand Translation Adjustment Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansForeignCurrencyTransactionandTranslationAdjustmentBeforeTax	36000000	USD
CY2017Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Foreign Currency Transactionand Translation Adjustment Netof Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansForeignCurrencyTransactionandTranslationAdjustmentNetofTax	-39000000	USD
	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Foreign Currency Transactionand Translation Adjustment Netof Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansForeignCurrencyTransactionandTranslationAdjustmentNetofTax	-51000000	USD
CY2018Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Foreign Currency Transactionand Translation Adjustment Netof Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansForeignCurrencyTransactionandTranslationAdjustmentNetofTax	129000000	USD
	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Foreign Currency Transactionand Translation Adjustment Netof Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansForeignCurrencyTransactionandTranslationAdjustmentNetofTax	29000000	USD
CY2017Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Foreign Currency Transactionand Translation Adjustment Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansForeignCurrencyTransactionandTranslationAdjustmentTax	-8000000	USD
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CY2018Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Foreign Currency Transactionand Translation Adjustment Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansForeignCurrencyTransactionandTranslationAdjustmentTax	27000000	USD
	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Foreign Currency Transactionand Translation Adjustment Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansForeignCurrencyTransactionandTranslationAdjustmentTax	7000000	USD
CY2017Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentBeforeTax	0	USD
	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentBeforeTax	9000000	USD
CY2018Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentBeforeTax	0	USD
	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Before Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentBeforeTax	0	USD
CY2017Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Netof Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentNetofTax	-1000000	USD
	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Netof Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentNetofTax	6000000	USD
CY2018Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Netof Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentNetofTax	0	USD
	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Netof Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentNetofTax	0	USD
CY2017Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentTax	1000000	USD
	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentTax	3000000	USD
CY2018Q2	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentTax	0	USD
	mmc	Other Comprehensive Income Loss Pensionand Other Postretirement Benefit Plans Re Measurement Adjustment Tax OtherComprehensiveIncomeLossPensionandOtherPostretirementBenefitPlansReMeasurementAdjustmentTax	0	USD
	mmc	Paymentof Contingent Consideration PaymentofContingentConsideration	5000000	USD
	mmc	Paymentof Contingent Consideration PaymentofContingentConsideration	9000000	USD
	mmc	Payments For Previous Acquisition Contingent Consideration PaymentsForPreviousAcquisitionContingentConsideration	60000000	USD
	mmc	Payments For Previous Acquisition Contingent Consideration PaymentsForPreviousAcquisitionContingentConsideration	32000000	USD
	mmc	Payments For Previous Acquisition Deferredand Contingent Consideration PaymentsForPreviousAcquisitionDeferredandContingentConsideration	97000000	USD
	mmc	Payments For Previous Acquisition Deferredand Contingent Consideration PaymentsForPreviousAcquisitionDeferredandContingentConsideration	85000000	USD
	mmc	Paymentsfor Acquisitions Deferredand Contingent Consideration PaymentsforAcquisitionsDeferredandContingentConsideration	97000000	USD
	mmc	Pensionand Other Postretirement Benefit Contributions In Excessof Current Year Expense PensionandOtherPostretirementBenefitContributionsInExcessofCurrentYearExpense	214000000	USD
	mmc	Paymentsfor Acquisitions Deferredand Contingent Consideration PaymentsforAcquisitionsDeferredandContingentConsideration	85000000	USD
	mmc	Pensionand Other Postretirement Benefit Contributions In Excessof Current Year Expense PensionandOtherPostretirementBenefitContributionsInExcessofCurrentYearExpense	178000000	USD
CY2017Q4	mmc	Stockholders Equity Subtotal Before Treasury Stock StockholdersEquitySubtotalBeforeTreasuryStock	10525000000	USD
CY2018Q2	mmc	Stockholders Equity Subtotal Before Treasury Stock StockholdersEquitySubtotalBeforeTreasuryStock	11240000000	USD
	mmc	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Deferred Tax Asset Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetProvisionalIncomeTaxExpenseBenefit	220000000	USD
	mmc	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpenseBenefit	240000000	USD
	mmc	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Withholdingand State Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalWithholdingandStateIncomeTaxExpenseBenefit	53000000	USD
CY2018Q2	mmc	Tax Cutsand Jobs Actof2017 Transition Taxfor Accumulated Foreign Earnings Liability TaxCutsandJobsActof2017TransitionTaxforAccumulatedForeignEarningsLiability	3400000000	USD
CY2017Q4	mmc	Uncollected Premiumsand Claims Netof Related Payables UncollectedPremiumsandClaimsNetofRelatedPayables	6800000000	USD
CY2018Q2	mmc	Uncollected Premiumsand Claims Netof Related Payables UncollectedPremiumsandClaimsNetofRelatedPayables	8300000000	USD
CY2017Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	2083000000	USD
CY2018Q2	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	2246000000	USD
CY2018Q1	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	2205000000	USD
CY2017Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	4243000000	USD
CY2018Q2	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	4717000000	USD
CY2017Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	199000000	USD
CY2018Q2	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	216000000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1826000000	USD
CY2018Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1857000000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-4043000000	USD
CY2018Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-4265000000	USD
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	784000000	USD
CY2018Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	732000000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	75000000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	99000000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	110000000	USD
CY2018Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	116000000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	80000000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	88000000	USD
CY2017Q4	us-gaap	Assets Assets	20429000000	USD
CY2018Q2	us-gaap	Assets Assets	21159000000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	5562000000	USD
CY2018Q2	us-gaap	Assets Current AssetsCurrent	6175000000	USD
CY2017Q2	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	0.98
	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	2.08
CY2018Q2	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	1.05
	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	2.41
CY2017Q2	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Diluted BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted	0.97
	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Diluted BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted	2.06
CY2018Q2	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Diluted BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted	1.04
	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Diluted BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted	2.39
CY2017Q2	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	503000000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	1072000000	USD
CY2018Q2	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	532000000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	1225000000	USD
CY2017Q2	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	3539000000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	7098000000	USD
CY2018Q2	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	3748000000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	7770000000	USD
	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	510000000	USD
	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	192000000	USD
	us-gaap	Business Combination Consideration Transferred Liabilities Incurred BusinessCombinationConsiderationTransferredLiabilitiesIncurred	74000000	USD
	us-gaap	Business Combination Consideration Transferred Liabilities Incurred BusinessCombinationConsiderationTransferredLiabilitiesIncurred	28000000	USD
	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	-13000000	USD
	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	2000000	USD
CY2018Q2	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	261000000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	557000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1026000000	USD
CY2017Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	966000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1205000000	USD
CY2018Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1036000000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-60000000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-169000000	USD
CY2017Q4	us-gaap	Commercial Paper CommercialPaper	0	USD
CY2018Q2	us-gaap	Commercial Paper CommercialPaper	175000000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
CY2018Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2018Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1600000000	shares
CY2018Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1600000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	560641640	shares
CY2018Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	560641640	shares
CY2017Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	513000000	shares
CY2018Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	505000000	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	561000000	USD
CY2018Q2	us-gaap	Common Stock Value CommonStockValue	561000000	USD
CY2017Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	797000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1622000000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	171000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1013000000	USD
CY2017Q2	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	6000000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	15000000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	5000000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	11000000	USD
CY2017Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	803000000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1637000000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	176000000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1024000000	USD
	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Measure Of Progress ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress	215000000	USD
CY2017Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	128000000	USD
CY2018Q2	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	178000000	USD
	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	166000000	USD
CY2017Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	583000000	USD
CY2018Q2	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	647000000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	334000000	USD
	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	36000000	USD
CY2017Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	5487000000	USD
CY2018Q2	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	6077000000	USD
CY2018Q2	us-gaap	Debt And Equity Securities Realized Gain Loss DebtAndEquitySecuritiesRealizedGainLoss	19000000	USD
CY2017Q4	us-gaap	Debt Current DebtCurrent	262000000	USD
CY2018Q2	us-gaap	Debt Current DebtCurrent	439000000	USD
CY2017Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	669000000	USD
CY2018Q2	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	532000000	USD
CY2018Q1	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	552000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	42000000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	34000000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	1693000000	USD
CY2018Q2	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	1808000000	USD
	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	55000000	USD
CY2017Q2	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	-63000000	USD
	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	-123000000	USD
CY2018Q2	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	-65000000	USD
	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	-131000000	USD
	us-gaap	Depreciation Depreciation	156000000	USD
	us-gaap	Depreciation Depreciation	159000000	USD
CY2017Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	0	USD
CY2018Q2	us-gaap	Dividends Payable Current DividendsPayableCurrent	212000000	USD
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.98
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.05
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.41
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.96
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.05
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.04
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.38
CY2017Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.286
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.259
CY2018Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.256
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.247
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	1718000000	USD
CY2018Q2	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	1103000000	USD
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	405000000	USD
CY2018Q2	us-gaap	Equity Method Investments EquityMethodInvestments	391000000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-8000000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	11000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	632000000	USD
CY2018Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	714000000	USD
CY2018Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	538000000	USD
CY2018Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	94000000	USD
CY2018Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	132000000	USD
CY2018Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	143000000	USD
CY2018Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	154000000	USD
CY2018Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	173000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1906000000	USD
CY2018Q2	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1948000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1274000000	USD
CY2018Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1234000000	USD
	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	73000000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	5000000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	28000000	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-9000000	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	1000000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	8369000000	USD
CY2017Q2	us-gaap	Goodwill Goodwill	8821000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	9089000000	USD
CY2018Q2	us-gaap	Goodwill Goodwill	9177000000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	370000000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	116000000	USD
	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-82000000	USD
	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	28000000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	501000000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	1070000000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	531000000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	1221000000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	6000000	USD
	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	15000000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	5000000	USD
	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	11000000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	711000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1464000000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	719000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1635000000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	507000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1085000000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	536000000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1232000000	USD
CY2018Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2000000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	9000000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	204000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	379000000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	183000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	403000000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	297000000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	349000000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	52000000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	30000000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	45000000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	18000000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-579000000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-614000000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	18000000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-4000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	34000000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	10000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	9000000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-10000000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	318000000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	388000000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	60000000	USD
	us-gaap	Interest Expense InterestExpense	118000000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	68000000	USD
	us-gaap	Interest Expense InterestExpense	129000000	USD
	us-gaap	Interest Paid InterestPaid	92000000	USD
	us-gaap	Interest Paid InterestPaid	107000000	USD
CY2017Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	2000000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	4000000	USD
CY2018Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	3000000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	6000000	USD
CY2017Q2	us-gaap	Investment Income Net InvestmentIncomeNet	5000000	USD
	us-gaap	Investment Income Net InvestmentIncomeNet	5000000	USD
CY2018Q2	us-gaap	Investment Income Net InvestmentIncomeNet	28000000	USD
	us-gaap	Investment Income Net InvestmentIncomeNet	28000000	USD
CY2017Q2	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	5000000	USD
CY2018Q2	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	28000000	USD
	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	26000000	USD
CY2017Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1998000000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	4003000000	USD
CY2018Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	2135000000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	4359000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	20429000000	USD
CY2018Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	21159000000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	4262000000	USD
CY2018Q2	us-gaap	Liabilities Current LiabilitiesCurrent	4216000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	5225000000	USD
CY2018Q2	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	5813000000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	262000000	USD
CY2018Q2	us-gaap	Long Term Debt Current LongTermDebtCurrent	264000000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	83000000	USD
CY2018Q2	us-gaap	Minority Interest MinorityInterest	81000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	16000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-232000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-538000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-279000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	343000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	413000000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	501000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1070000000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	531000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	1221000000	USD
CY2017Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	6000000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	15000000	USD
CY2018Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5000000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	11000000	USD
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CY2017Q2	us-gaap	Operating Expenses OperatingExpenses	2794000000	USD
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CY2018Q2	us-gaap	Operating Expenses OperatingExpenses	3043000000	USD
	us-gaap	Operating Expenses OperatingExpenses	6135000000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	701000000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	1450000000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	691000000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	1599000000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	224000000	USD
CY2018Q2	us-gaap	Other Assets Current OtherAssetsCurrent	538000000	USD
CY2018Q1	us-gaap	Other Assets Current OtherAssetsCurrent	542000000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1430000000	USD
CY2018Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1535000000	USD
CY2018Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1656000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	0	USD
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CY2018Q2	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-1000000	USD
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CY2017Q2	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	0	USD
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CY2018Q2	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	-1000000	USD
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CY2017Q2	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	0	USD
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	0	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	0	USD
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	0	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	309000000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	572000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-337000000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-193000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	290000000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	525000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-529000000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-301000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	289000000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	524000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-516000000	USD
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CY2017Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	1000000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	1000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-13000000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-8000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	296000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	552000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-360000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-208000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	5000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-28000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-192000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-108000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	7000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-17000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-156000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-85000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-2000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-11000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-36000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-23000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	42000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	82000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	36000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	72000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-42000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-82000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-37000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-74000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-33000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-63000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-28000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-58000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-9000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-19000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-9000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-16000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	33000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	63000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	27000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	56000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	9000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	19000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	9000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	16000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	13000000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	20000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	23000000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	15000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	24000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	19000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	0	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	0	USD
CY2017Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	14000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	11000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
CY2017Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	10000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	8000000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
CY2017Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	796000000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1545000000	USD
CY2018Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	908000000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1776000000	USD
CY2017Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	1274000000	USD
CY2018Q2	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	1234000000	USD
CY2018Q2	us-gaap	Other Investments OtherInvestments	64000000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1311000000	USD
CY2018Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1262000000	USD
CY2018Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1334000000	USD
CY2017Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	401000000	USD
CY2018Q2	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	367000000	USD
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	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	3000000	USD
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	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	400000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	500000000	USD
CY2017	us-gaap	Payments For Restructuring PaymentsForRestructuring	71000000	USD
	us-gaap	Payments For Restructuring PaymentsForRestructuring	41000000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	351000000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	383000000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	48000000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	62000000	USD
	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	420000000	USD
	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	160000000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	412000000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	144000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	144000000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	135000000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	13000000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	11000000	USD
CY2017Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	1888000000	USD
CY2018Q2	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	1768000000	USD
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
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CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	6000000	shares
CY2018Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	6000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q2	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
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	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	987000000	USD
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	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	100000000	USD
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	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	4000000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1000000	USD
CY2017Q2	us-gaap	Profit Loss ProfitLoss	507000000	USD
	us-gaap	Profit Loss ProfitLoss	1085000000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	536000000	USD
	us-gaap	Profit Loss ProfitLoss	1232000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	712000000	USD
CY2018Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	698000000	USD
CY2017Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	4133000000	USD
CY2018Q2	us-gaap	Receivables Net Current ReceivablesNetCurrent	4601000000	USD
CY2018Q1	us-gaap	Receivables Net Current ReceivablesNetCurrent	4201000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	256000000	USD
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CY2017Q2	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	250000000	USD
CY2018Q2	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	189000000	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	40000000	USD
	us-gaap	Restructuring Charges RestructuringCharges	64000000	USD
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CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	65000000	USD
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CY2017	us-gaap	Restructuring Reserve Translation Adjustment RestructuringReserveTranslationAdjustment	3000000	USD
	us-gaap	Restructuring Reserve Translation Adjustment RestructuringReserveTranslationAdjustment	-1000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	13140000000	USD
CY2018Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	14131000000	USD
CY2018Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	13504000000	USD
CY2017Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	3495000000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	6998000000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	3734000000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	7734000000	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	239000000	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	129000000	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	74000000	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	41000000	USD
CY2018Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	17000000	USD
CY2017Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	12400000	shares
CY2018Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	10500000	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Shares Issued In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod	3700000	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Shares Issued In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod	2500000	shares
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	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	75000000	USD
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CY2017Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7074000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7442000000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7797000000	USD
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	51930135	shares
CY2018Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	55507129	shares
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	3083000000	USD
CY2018Q2	us-gaap	Treasury Stock Value TreasuryStockValue	3443000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	71000000	USD
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CY2017Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	6000000	shares
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CY2018Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	5000000	shares
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CY2017Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	520000000	shares
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CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	512000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	513000000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	514000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	514000000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	507000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	507000000	shares
	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">Nature of Operations </font></div><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Marsh & McLennan Companies, Inc. and its consolidated subsidiaries (the "Company"), a global professional services firm, is organized based on the different services that it offers. Under this structure, the Company’s </font><font style="font-family:Arial;font-size:10pt;">two</font><font style="font-family:Arial;font-size:10pt;"> segments are Risk and Insurance Services and Consulting.</font></div><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">The Risk and Insurance Services segment provides risk management solutions, services, advice and insurance broking, reinsurance broking and insurance program management services for businesses, public entities, insurance companies, associations, professional services organizations and private clients. The Company conducts business in this segment through Marsh and Guy Carpenter.</font></div><div style="line-height:120%;padding-top:6px;text-align:left;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">The Company conducts business in its Consulting segment through Mercer and Oliver Wyman Group. Mercer provides consulting expertise, advice, services and solutions in the areas of health, wealth and career. As of </font><font style="font-family:Arial;font-size:10pt;">June 30, 2018</font><font style="font-family:Arial;font-size:10pt;">, Mercer had assets under delegated management of approximately </font><font style="font-family:Arial;font-size:10pt;">$240 billion</font><font style="font-family:Arial;font-size:10pt;"> worldwide. Oliver Wyman Group provides specialized management and economic and brand consulting services.</font></div><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Acquisitions impacting the Risk and Insurance Services and Consulting segments are discussed in Note 8 to the consolidated financial statements.</font></div></div>

Files In Submission

Name	View Source	Status
0000062709-18-000032-index-headers.html	Edgar Link	pending
0000062709-18-000032-index.html	Edgar Link	pending
0000062709-18-000032.txt	Edgar Link	pending
0000062709-18-000032-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
logommc2015.jpg	Edgar Link	pending
mmc-20180630.xml	Edgar Link	completed
mmc-20180630.xsd	Edgar Link	pending
mmc-20180630_cal.xml	Edgar Link	unprocessable
mmc-20180630_def.xml	Edgar Link	unprocessable
mmc-20180630_lab.xml	Edgar Link	unprocessable
mmc-20180630_pre.xml	Edgar Link	unprocessable
mmc0630201810q.htm	Edgar Link	pending
mmc0630201810qex_101.htm	Edgar Link	pending
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$MMC
MARSH & MCLENNAN COMPANIES, INC. Stock $mmc

2018 Q2 Form 10-Q Financial Statement

#000006270918000032 Filed on July 27, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MMC MARSH & MCLENNAN COMPANIES, INC. Stock $mmc

2018 Q2 Form 10-Q Financial Statement

#000006270918000032 Filed on July 27, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MMC
MARSH & MCLENNAN COMPANIES, INC. Stock $mmc