Employee Benefit Plans (Schedule of Net Periodic Benefit Cost) (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	$ 23	$ 22	$ 23
Expected return on plan assets	(29)	(26)	(25)
Net amortization	4	5	4
Net periodic benefit (income) cost	$ (2)	$ 1	$ 2