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Maximum Commercial Paper Outstanding with 2018 Facility

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Weighted Average Maturity, Days

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Gross amount of debt extinguished.

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Borrowings and Credit Arrangements (Details) € in Millions, $ in Millions			3 Months Ended	12 Months Ended
	Apr. 21, 2020 USD ($)	Jan. 09, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Feb. 27, 2020 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2019 USD ($)	Dec. 05, 2019 USD ($)	Aug. 19, 2019 USD ($)	Mar. 31, 2019 USD ($)	Feb. 25, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 19, 2018 USD ($)
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount			$ 107				$ 105
Total debt			10,336				10,008
Restricted Cash and Cash Equivalents in Other current assets			288				346			$ 2,724
Long-term Debt and Capital Lease Obligations			9,331				8,592
Debt, Current			1,004				1,416
Exclusion from EBITDA for Restructuring Charges			500
Restructuring charges remaining to be excluded from calculation of consolidated EBITDA			240
Litigation and Debt Exclusion from EBITDA			2,624
Legal payments remaining to be excluded from calculation of consolidated EBITDA			964
Commercial Paper [Member]
Debt Instrument [Line Items]
Commercial Paper			0				711
Maximum Commercial Paper Outstanding with 2017 Facility			2,750				2,750
Line of Credit Facility, Remaining Borrowing Capacity			$ 1,390				$ 2,039
Weighted Average Maturity, Days			0 days	55 days
Short-term Debt, Weighted Average Interest Rate, at Point in Time			0.00%			2.21%	2.21%
August 2019 Term Loan [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount			$ 1,000
Current Requirement [Member]
Debt Instrument [Line Items]
Maximum Leverage Ratio			4.50
Current Requirement [Member]
Debt Instrument [Line Items]
Maximum Leverage Ratio			4.50
Requirement, first two quarters following qualified acquisition [Member]
Debt Instrument [Line Items]
Maximum Leverage Ratio			4.75
Actual, Covenant [Member]
Debt Instrument [Line Items]
Maximum Leverage Ratio			4.10
Requirement, third quarter following qualified acquisition [Member]
Debt Instrument [Line Items]
Maximum Leverage Ratio			4.50
Requirement, fourth quarter following qualified acquisition [Member]
Debt Instrument [Line Items]
Maximum Leverage Ratio			4.25
Requirement, fifth quarter following qualified acquisition [Member]
Debt Instrument [Line Items]
Maximum Leverage Ratio			4.00
Requirement, sixth quarter and thereafter following qualified acquisition [Member]
Debt Instrument [Line Items]
Maximum Leverage Ratio			3.75
the 2018 Facility [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount			$ 1,360		$ 1,360
Line of Credit Facility, Maximum Borrowing Capacity			2,750
December 2020 Term Loan [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 400
February2019AggregateOffering [Member]
Debt Instrument [Line Items]
Long-term Debt											$ 4,300
January 2020 Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			6.00%
Extinguishment of Debt, Amount			$ 850
May 2020 Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			2.85%
Extinguishment of Debt, Amount			$ 600
November 2019 Aggregate Offering [Member]
Debt Instrument [Line Items]
Long-term Debt						€ 900	$ 1,000
May 2022 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 500				500
Debt Instrument, Interest Rate, Stated Percentage			3.375%
October 2023 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 244				244					$ 450
Debt Instrument, Interest Rate, Stated Percentage			4.125%
Repayments of Debt				$ 206
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 1,360
March 2024 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 850				850
Debt Instrument, Interest Rate, Stated Percentage			3.45%
May 2025 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 523				523					750
Debt Instrument, Interest Rate, Stated Percentage			3.85%
Repayments of Debt				227
March 2026 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 850				850
Debt Instrument, Interest Rate, Stated Percentage			3.75%
December 2027 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 988				1,011
Debt Instrument, Interest Rate, Stated Percentage			0.625%
March 2028 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 434				434					$ 1,000
Debt Instrument, Interest Rate, Stated Percentage			4.00%
Repayments of Debt				$ 566
March 2029 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 850				850
Debt Instrument, Interest Rate, Stated Percentage			4.00%
November 2035 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 350				350
Debt Instrument, Interest Rate, Stated Percentage			7.00%
March 2039 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 750				750
Debt Instrument, Interest Rate, Stated Percentage			4.55%
January 2040 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 300				300
Debt Instrument, Interest Rate, Stated Percentage			7.375%
March 2049 Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 1,000				1,000
Debt Instrument, Interest Rate, Stated Percentage			4.70%
Unamortized Gain on Fair Value Hedges
Debt Instrument [Line Items]
Long-term Debt			$ 7				7
Finance Lease Obligation
Debt Instrument [Line Items]
Long-term Debt			7				6
Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			7,638				7,661
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net			(79)				(83)
August 2022 Term Loan [Member]
Debt Instrument [Line Items]
Long-term Debt			0				$ 1,000
2020 Term Loan [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 400
Debt Instrument, Interest Rate, Stated Percentage						0.65%	0.65%
Short-term Debt							$ 700	$ 700
Repayments of Debt		$ 300
February 2021 Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			0.85%
Short-term Debt			$ 1,000		$ 1,000
Three-Year Delayed Draw Term Loan [Member] \| Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Long-term Line of Credit							1,000		$ 1,000				$ 1,000
Two-Year Delayed Draw Term Loan [Member] \| Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Long-term Line of Credit									$ 1,000				1,000
Aggregate Senior Unsecured Delayed Draw Term Loan [Member] \| Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Line of Credit													$ 2,000
Yen Denominated Factoring Arrangements [Member]
Transfer of Financial Assets Accounted for as Sales [Line Items]
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized			$ 197				226
Average interest rate of de-recognized receivables			0.60%	0.60%
Euro Denominated Factoring Arrangements [Member]
Transfer of Financial Assets Accounted for as Sales [Line Items]
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized			$ 147				$ 171
Average interest rate of de-recognized receivables			1.90%	1.40%
Subsequent Event [Member]
Debt Instrument [Line Items]
Deemed Consolidated EBITDA	$ 671
Subsequent Event [Member] \| Requirement, extension through the remainder of 2020 [Member]
Debt Instrument [Line Items]
Maximum Leverage Ratio	4.75
Subsequent Event [Member] \| $400M Accordion Feature on April 2021 TL [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 400
Subsequent Event [Member] \| April 2021 Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.875%
Short-term Debt	$ 1,250