Business Segments (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Capital expenditures	$ 923	$ 1,168	$ 1,127
Depreciation and Amortization	732	722	687
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	69	74	35
Depreciation and Amortization	31	42	36
Operating Segments
Segment Reporting Information [Line Items]
Capital expenditures	854	1,094	1,092
Depreciation and Amortization	701	680	651
North America
Segment Reporting Information [Line Items]
Capital expenditures	282	262	212
Depreciation and Amortization	274	275	275
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Capital expenditures	266	332	344
Depreciation and Amortization	220	228	215
Latin America
Segment Reporting Information [Line Items]
Capital expenditures	152	243	250
Depreciation and Amortization	102	84	72
Asia Pacific
Segment Reporting Information [Line Items]
Capital expenditures	154	257	286
Depreciation and Amortization	$ 105	$ 93	$ 89