Derivatives And Other Financial Instruments (Narrative) (Details)	6 Months Ended
	Jun. 30, 2011 USD ($)	Jun. 30, 2011 CAD	Jun. 30, 2011 Level 3 [Member] USD ($)	Mar. 31, 2011 Level 3 [Member] USD ($)	Dec. 31, 2010 Level 3 [Member] USD ($)
Net unrealized loss on derivative contracts			$ 796,000,000	$ 969,000,000	$ 779,000,000
Amount of aluminum designated as fair value hedges, kmt	229
Face amount of debt the hedges effectively convert from fixed to floating through 2018	515,000,000
Notional amount interest rate swaps	550,000,000
Gain on termination of interest rate swaps	33,000,000
Investment foreign currency, contract, foreign currency amount	$ 60,000,000	58,000,000