Business Segments - Equity In Net Income of Investees Accounted For By Equity Method (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Equity in (Income) Loss	$ 0	$ 0	$ 0
Operating Segments
Segment Reporting Information [Line Items]
Equity in (Income) Loss	32	10	(5)
Operating Segments | Americas
Segment Reporting Information [Line Items]
Equity in (Income) Loss	32	11	(5)
Operating Segments | Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Equity in (Income) Loss	$ 0	$ (1)	$ 0