Accumulated Other Comprehensive Loss (AOCL) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Changes in Accumulated Other Comprehensive Loss (AOCL) [Roll Forward]
Balance at beginning of period	$ (407)	$ (425)
Other comprehensive income (loss) before reclassifications	(30)	8
Net current period other comprehensive income (loss)	0	14
Other Comprehensive Income (Loss), Net	(30)	22
Balance at end of period	(437)	(403)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Changes in Accumulated Other Comprehensive Loss (AOCL) [Roll Forward]
Balance at beginning of period	(408)	(426)
Other comprehensive income (loss) before reclassifications	(28)	7
Net current period other comprehensive income (loss)	0	15
Other Comprehensive Income (Loss), Net	(28)	22
Balance at end of period	(436)	(404)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Changes in Accumulated Other Comprehensive Loss (AOCL) [Roll Forward]
Balance at beginning of period	3	2
Other comprehensive income (loss) before reclassifications	(3)	1
Net current period other comprehensive income (loss)	0	0
Other Comprehensive Income (Loss), Net	(3)	1
Balance at end of period	0	3
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Changes in Accumulated Other Comprehensive Loss (AOCL) [Roll Forward]
Balance at beginning of period	(2)	(1)
Other comprehensive income (loss) before reclassifications	1	0
Net current period other comprehensive income (loss)	0	(1)
Other Comprehensive Income (Loss), Net	1	(1)
Balance at end of period	$ (1)	$ (2)