Schedule II - Valuation and Qualifying Accounts and Reserves - Amounts Deducted From Assets in the Balance Sheets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance at beginning of period	$ 9	$ 9	$ 8
Amounts charged or credited to income	0	2	3
Allowance utilized	(1)	0	0
Adjustments arising from change in currency exchange rates and other items	(1)	(2)	(2)
Balance at end of period	7	9	9
SEC Schedule, 12-09, Reserve, Inventory [Member]
Balance at beginning of period	64	51	53
Amounts charged or credited to income	23	25	15
Allowance utilized	(14)	(16)	(11)
Adjustments arising from change in currency exchange rates and other items	3	4	(6)
Balance at end of period	76	64	51
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Balance at beginning of period	190	281	301
Amounts charged or credited to income	60	(102)	(31)
Allowance utilized	0	0	0
Adjustments arising from change in currency exchange rates and other items	9	11	11
Balance at end of period	$ 259	$ 190	$ 281