Aggregate Funding Levels of Defined Benefit Pension Plans (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
United States Pension Plans of US Entity, Defined Benefit
Plans with fair value of plan assets in excess of obligations:
Accumulated benefit obligation	$ 16	$ 15
Projected benefit obligation	16	15
Fair value of plan assets	16	15
Plans with obligations in excess of fair value of plan assets:
Accumulated benefit obligation	1,915	1,851
Projected benefit obligation	1,915	1,851
Fair value of plan assets	1,481	1,441
Foreign Pension Plans, Defined Benefit
Plans with fair value of plan assets in excess of obligations:
Accumulated benefit obligation	16	90
Projected benefit obligation	16	91
Fair value of plan assets	24	101
Plans with obligations in excess of fair value of plan assets:
Accumulated benefit obligation	209	215
Projected benefit obligation	227	234
Fair value of plan assets	$ 19	$ 19

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.

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- 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