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Pension Plans with Projected and Accumulated Benefit Obligations in Excess of Plan Assets (Detail) (JPY ¥) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Japanese Plans
Plans with projected benefit obligations in excess of plan assets:
Projected benefit obligations	¥ 622,645	¥ 589,391
Fair value of plan assets	444,403	455,862
Plans with accumulated benefit obligations in excess of plan assets:
Accumulated benefit obligations	591,830	559,468
Fair value of plan assets	444,403	453,342
Foreign Plans
Plans with projected benefit obligations in excess of plan assets:
Projected benefit obligations	259,517	258,326
Fair value of plan assets	188,023	193,713
Plans with accumulated benefit obligations in excess of plan assets:
Accumulated benefit obligations	160,941	144,225
Fair value of plan assets	¥ 111,527	¥ 122,590

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.

+ References+ Details

- Definition

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