Revenue Disaggregation of Revenue - Geography (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Net Sales		$ 6,288	$ 6,699
U.S. & Canada
Disaggregation of Revenue [Line Items]
Net Sales		2,250	2,515
EMEA
Disaggregation of Revenue [Line Items]
Net Sales	[1]	2,110	2,166
Asia Pacific
Disaggregation of Revenue [Line Items]
Net Sales		1,459	1,535
Latin America
Disaggregation of Revenue [Line Items]
Net Sales		$ 469	$ 483

[1] Europe, Middle East, and Africa ("EMEA").