Asset Impairment Charges And Exit Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Asset Impairment Charges And Exit Costs [Abstract]
Employee-related costs	$ 71
Facility exit and other related costs	14
Total asset impairment, exit and restructuring costs	85
Pension remeasurement charge	$ 34