Restructuring Accruals (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring accrual
Beginning balance, restructuring reserve	$ 45	$ 69
Net cash paid, principally severance and related benefits	(8)	(15)
Other, including foreign exchange translation	(3)	(1)
Ending balance, restructuring reserve	34	53
Employee Costs
Restructuring accrual
Beginning balance, restructuring reserve	32	47
Net cash paid, principally severance and related benefits	(8)	(13)
Other, including foreign exchange translation	(2)
Ending balance, restructuring reserve	22	34
Other Exit Costs
Restructuring accrual
Beginning balance, restructuring reserve	13	22
Net cash paid, principally severance and related benefits		(2)
Other, including foreign exchange translation	(1)	(1)
Ending balance, restructuring reserve	$ 12	$ 19