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Projected Benefit Obligations, Accumulated Benefit Obligations and Fair Value of Plan Assets for Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets (Detail) (JPY ¥) In Millions, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Japanese plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations	¥ 819,059	¥ 781,983
Accumulated benefit obligations	816,360	779,604
Fair value of plan assets	599,227	549,017
Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations	210,384	170,314
Accumulated benefit obligations	204,253	163,002
Fair value of plan assets	¥ 154,058	¥ 111,667

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

- 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