The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Other investment (income) expense, net	$ (10)	$ 59	$ (67)	$ 50
Secured Debt [Member] \| Term Loan B Facility [Member]
Long-term Debt	1,920		1,920		$ 1,935
Cash Flow Hedging [Member]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 19
Cash Flow Hedging [Member] \| Forward-starting interest rate swap [Member]
Derivative, Maturity Date	Mar. 01, 2025
Derivative, Notional Amount	$ 1,500		1,500
Cash Flow Hedging [Member] \| Interest Rate Swap [Member]
Derivative, Maturity Date	Jul. 27, 2021
Derivative, Notional Amount	$ 1,550		1,550
Cash Flow Hedging [Member] \| Foreign Exchange Contract [Member] \| Maximum [Member]
Derivative, Maturity Date	Mar. 01, 2025
Intercompany receivables and payables [Domain] \| Cash Flow Hedging [Member] \| Foreign Exchange Contract [Member]
Derivative, Notional Amount	$ 53		$ 53		$ 20