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Benefits Expected to be Paid (Detail) (JPY ¥)
In Millions, unless otherwise specified
Mar. 31, 2014
Domestic Pension Plans Of Foreign Entity Defined Benefit
 
Defined Benefit Plan Disclosure [Line Items]  
2015 ¥ 1,900
2016 1,716
2017 1,827
2018 1,897
2019 1,891
2020-2024 12,339
Total 21,570
Overseas Pension Plans Defined Benefit
 
Defined Benefit Plan Disclosure [Line Items]  
2015 1,492
2016 1,379
2017 1,386
2018 1,394
2019 1,430
2020-2024 8,360
Total ¥ 15,441