Employee Benefit Plans (Schedule of Changes in Projected Benefit Obligations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	$ 179
Defined Benefit Plan, Benefit Obligation, Ending Balance	220	$ 179
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	179	172
Defined Benefit Plan, Service Cost	13	13	$ 11
Defined Benefit Plan, Interest Cost	7	5	5
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Actuarial Net (Gains) Losses	28	(1)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(8)	(8)
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Benefit Obligation	1	(2)
Defined Benefit Plan, Benefit Obligation, Ending Balance	220	179	172
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	67	70
Defined Benefit Plan, Service Cost	3	3	2
Defined Benefit Plan, Interest Cost	3	2	2
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Actuarial Net (Gains) Losses	15	(7)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(1)	(1)
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Benefit Obligation	0	0
Defined Benefit Plan, Benefit Obligation, Ending Balance	$ 87	$ 67	$ 70