Accumulated Other Comprehensive Loss (AOCL) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Changes in Accumulated Other Comprehensive Loss (AOCL) [Roll Forward]
Balance at beginning of period			$ (407)	$ (425)
Other comprehensive income (loss) before reclassifications			(26)	7
Net current period other comprehensive income (loss)			0	14
Other Comprehensive Income (Loss), Net	$ 4	$ (1)	(26)	21
Balance at end of period	(433)	(404)	(433)	(404)
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			(26)	6
Net current period other comprehensive income (loss)			0	15
Other Comprehensive Income (Loss), Net			(26)	21
Balance at end of period	(434)	(405)	(434)	(405)
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			(1)	1
Net current period other comprehensive income (loss)			0	0
Other Comprehensive Income (Loss), Net			(1)	1
Balance at end of period	2	3	2	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)