Business Segments - Capital Expenditures Depreciation and Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Capital expenditures	$ 983	$ 923	$ 1,168
Depreciation and amortization	698	732	722
Operating Segments
Segment Reporting Information [Line Items]
Capital expenditures	825	854	1,094
Depreciation and amortization	664	701	680
Operating Segments | North America
Segment Reporting Information [Line Items]
Capital expenditures	353	282	262
Depreciation and amortization	270	274	275
Operating Segments | Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Capital expenditures	223	266	332
Depreciation and amortization	186	220	228
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Capital expenditures	124	154	257
Depreciation and amortization	114	105	93
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Capital expenditures	125	152	243
Depreciation and amortization	94	102	84
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	158	69	74
Depreciation and amortization	34	$ 31	$ 42
San Luis Potosi, Mexico | Corporate
Segment Reporting Information [Line Items]
Capital expenditures	$ 140