Property, Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified							12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Owned [Member]	Dec. 31, 2011 Owned [Member]	Dec. 31, 2012 Assets Held under Capital Leases [Member]	Dec. 31, 2011 Assets Held under Capital Leases [Member]	Dec. 31, 2012 Minimum [Member] Building and Building Improvements [Member]	Dec. 31, 2012 Minimum [Member] Machinery and Equipment [Member]	Dec. 31, 2012 Maximum [Member] Building and Building Improvements [Member]	Dec. 31, 2012 Maximum [Member] Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Land	$ 416	$ 412	$ 415	$ 411	$ 1	$ 1
Buildings	2,078	1,991	2,061	1,974	17	17
Machinery and equipment	12,082	11,479	12,036	11,460	46	19
Construction in progress	1,188	948	1,173	948	15	0
Property, plant and equipment, gross	15,764	14,830	15,685	14,793	79	37
Accumulated depreciation	(8,991)	(8,629)	(8,975)	(8,619)	(16)	(10)
Property plant and equipment net before spare parts	6,773	6,201	6,710	6,174	63	27
Spare parts	183	174	183	174	0	0
Property, plant and equipment, net	$ 6,956	$ 6,375	$ 6,893	$ 6,348	$ 63	$ 27
Property, Plant and Equipment, Useful Life, Minimum							5 years	3 years	45 years	30 years