Employee Benefit Plans (Details 3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
U.S. [Member]
Pension Plans With Accumulated Benefit Obligation in Excess of Plan Assets
Projected benefit obligations	$ 12,157	$ 10,265
Accumulated benefit obligations	11,191	9,528
Fair value of plan assets	8,707	8,566
International [Member]
Pension Plans With Accumulated Benefit Obligation in Excess of Plan Assets
Projected benefit obligations	4,207	3,668
Accumulated benefit obligations	3,586	3,113
Fair value of plan assets	$ 2,357	$ 2,190

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details

- Definition

If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details