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Minimum Future Rentals on Non-Cancelable Operating Leases (Detail) (Operating Leases) In Millions	Mar. 31, 2011 USD ($)	Mar. 31, 2011 JPY (¥)
Schedule of Operating Leases [Line Items]
2012	$ 1,741	¥ 144,758
2013	1,143	95,032
2014	760	63,187
2015	484	40,238
2016	296	24,628
Thereafter	663	55,180
Total	$ 5,087	¥ 423,023

X

- Definition

Schedule of Operating Leases [Line Items]

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X

- Definition

Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 23
-Subparagraph b(ii)

+ Details

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X

- Definition

Future rental payments receivable within one year of the balance sheet date under an operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 23
-Subparagraph b(ii)

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- Definition

Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 23
-Subparagraph b(ii)

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- Definition

Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 23
-Subparagraph b(ii)

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- Definition

Future rental payments receivable within the third year from the balance sheet date under an operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 23
-Subparagraph b(ii)

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- Definition

Future rental payments receivable within the second year from the balance sheet date under an operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 23
-Subparagraph b(ii)

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- Definition

Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 23
-Subparagraph b(ii)

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