Postretirement Benefits (Details) (U.S. Pension Benefits, USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2010	Sep. 30, 2010	Aug. 31, 2010
U.S. Pension Benefits
Amendments to Pension and Other Postretirement Benefit Plans
Increase (decrease) in post employment benefit liability due to plan remeasurement			$ 1,320,000,000
Increase (decrease) in accumulated other comprehensive income			(831,000,000)
Curtailment losses due to pension plan amendment	$ 28,000,000	$ 28,000,000

The amount of increase or decrease in the accumulated benefit obligation related to the effects of a change in the substantive terms of an existing defined benefit pension plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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