Derivative Instruments (Details 2) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ (19,000,000)	$ (44,000,000)	$ (93,000,000)	$ (60,000,000)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	4,000,000	1,000,000	(5,000,000)	(14,000,000)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	4,000,000	11,000,000	24,000,000	19,000,000
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	(1,000,000)	0	1,000,000	3,000,000
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	5,000,000	11,000,000	23,000,000	16,000,000
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	1,550,000,000		1,550,000,000		$ 1.55
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(17,000,000)	(43,000,000)	(98,000,000)	(70,000,000)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	3,000,000	(5,000,000)	2,000,000	(10,000,000)
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(2,000,000)	(1,000,000)	5,000,000	10,000,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1,000,000	$ 6,000,000	(7,000,000)	$ (4,000,000)
Intercompany receivables and payables [Domain] | Foreign Exchange Contract [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$ 53,000,000		$ 53,000,000		$ 20,000,000