Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Commitments and Contingencies (Amounts in Paragraphs)
Environmental liabilities recorded in other current liabilities	$ 86,000,000	$ 106,000,000
Environmental liabilities recorded in other long-term liabilities	236,000,000	207,000,000
Low-end of the range of reasonably possible future costs for environmental remediation sites	294,000,000
High-end of the range of reasonably possible future costs for environmental remediation sites	752,000,000
Amounts accrued for probable environmental remediation costs	322,000,000
Guarantee of Outstanding Economic Development Revenue Bonds	84,000,000
Deferred in inventoried costs	59,000,000	61,000,000
Deferred in miscellaneous other assets	132,000,000	124,000,000
Financial Arrangements
Unused standby letters of credit	195,000,000
Bank guarantees	186,000,000
Surety bonds outstanding	136,000,000
Operating leases
Rental expense for operating leases, excluding discontinued operations and net of immaterial amounts of sublease rental income	420,000,000	448,000,000	502,000,000
Total minimum rental commitments	1,200,000,000
Minimum rental commitments due in 2012	297,000,000
Minimum rental commitments due in 2013	234,000,000
Minimum rental commitments due in 2014	208,000,000
Minimum rental commitments due in 2015	176,000,000
Minimum rental commitments due in 2016	136,000,000
Minimum rental commitments due thereafter	$ 168,000,000