Summary of Significant Accounting Policies (Details 2) (USD $) In Millions, unless otherwise specified							12 Months Ended			12 Months Ended			12 Months Ended			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Land and land improvements		Dec. 31, 2011 Land and land improvements		Dec. 31, 2012 Land and land improvements Maximum	Dec. 31, 2012 Buildings and improvements	Dec. 31, 2011 Buildings and improvements	Dec. 31, 2012 Buildings and improvements Maximum	Dec. 31, 2012 Machinery and other equipment	Dec. 31, 2011 Machinery and other equipment	Dec. 31, 2012 Machinery and other equipment Maximum	Dec. 31, 2012 Capitalized software costs	Dec. 31, 2011 Capitalized software costs	Dec. 31, 2012 Capitalized software costs Minimum	Dec. 31, 2012 Capitalized software costs Maximum	Dec. 31, 2012 Leasehold improvements		Dec. 31, 2011 Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, cost	$ 7,033	$ 6,980	$ 373	[1]	$ 375	[1]		$ 1,421	$ 1,433		$ 4,233	$ 4,143		$ 413	$ 444			$ 593	[1]	$ 585	[1]
Accumulated depreciation	(4,146)	(3,933)
Property, plant, and equipment, net	$ 2,887	$ 3,047
Property, plant and equipment, estimated useful life							40 years			45 years			20 years			3 years	5 years

[1] Land is not a depreciable asset. Leasehold improvements are depreciated over the useful life of the asset if it is shorter than the length of the lease.