Accumulated Other Comprehensive Loss (AOCL) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Changes in Accumulated Other Comprehensive Loss (AOCL) [Roll Forward]
Balance at beginning of period			$ (407)	$ (425)
Other comprehensive income (loss) before reclassifications			(14)	(8)
Net current period other comprehensive income (loss)			0	14
Other Comprehensive Income (Loss), Net	$ 12	$ (15)	(14)	6
Balance at end of period	(421)	(419)	(421)	(419)
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			(15)	(9)
Net current period other comprehensive income (loss)			0	15
Other Comprehensive Income (Loss), Net			(15)	6
Balance at end of period	(423)	(420)	(423)	(420)
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			0	1
Net current period other comprehensive income (loss)			0	0
Other Comprehensive Income (Loss), Net			0	1
Balance at end of period	3	3	3	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)	$ (1)	$ (2)