Derivative Instruments - Change in Unrealized Gains (Losses) in AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 684	$ 766	$ 701
Ending Balance	536	684	766
Cash Flow Hedging
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	4	2	2
Other comprehensive gain (loss) before reclassifications	3	(2)	9
Reclassifications from accumulated other comprehensive loss to net earnings	(5)	4	(9)
Ending Balance	2	4	2
Net Investment Hedging
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	0	0	0
Other comprehensive gain (loss) before reclassifications	(10)	0	0
Reclassifications from accumulated other comprehensive loss to net earnings	0	0	0
Ending Balance	$ (10)	$ 0	$ 0