Goodwill and Intangible Assets (Details 3) (JPY ¥) In Millions	12 Months Ended
Mar. 31, 2010	Mar. 31, 2009	Mar. 31, 2011
Balance
Goodwill - gross	¥ 453,156	¥ 463,588	¥ 483,292
Accumulated Impairments	(14,287)	(19,630)	(14,287)
Goodwill	438,869	443,958	469,005
Increase (decrease) due to:
Acquisition	47,847	13,425
Sales and dispositions	(257)	(229)
Impairments	0	(1,055)
Translation adjustments	(17,335)	(8,468)
Other	(119)	(8,762)
Consumer, Professional & Devices [Member]
Balance
Goodwill - gross	72,808	73,349	73,992
Accumulated Impairments	(5,620)	(5,620)	(5,620)
Goodwill	67,188	67,729	68,372
Increase (decrease) due to:
Acquisition	1,085	0
Sales and dispositions	0	0
Impairments	0	0
Translation adjustments	(133)	(71)
Other	232	(470)
Networked Products & Services [Member]
Balance
Goodwill - gross	123,881	123,432	123,285
Accumulated Impairments	0	0	0
Goodwill	123,881	123,432	123,285
Increase (decrease) due to:
Acquisition	0	724
Sales and dispositions	(257)	(27)
Impairments	0	0
Translation adjustments	(510)	(249)
Other	171	1
Pictures [Member]
Balance
Goodwill - gross	102,481	107,478	140,584
Accumulated Impairments	0	0	0
Goodwill	102,481	107,478	140,584
Increase (decrease) due to:
Acquisition	46,504	6
Sales and dispositions	0	0
Impairments	0	0
Translation adjustments	(8,401)	(5,427)
Other	0	424
Music [Member]
Balance
Goodwill - gross	110,192	112,963	102,994
Accumulated Impairments	(306)	(306)	(306)
Goodwill	109,886	112,657	102,688
Increase (decrease) due to:
Acquisition	203	7,848
Sales and dispositions	0	0
Impairments	0	0
Translation adjustments	(6,956)	(1,943)
Other	(445)	(8,676)
Financial Services [Member]
Balance
Goodwill - gross	3,020	3,020	3,020
Accumulated Impairments	(706)	0	(706)
Goodwill	2,314	3,020	2,314
Increase (decrease) due to:
Acquisition	0	0
Sales and dispositions	0	0
Impairments	0	(706)
Translation adjustments	0	0
Other	0	0
All Other and Corporate [Member]
Balance
Goodwill - gross	40,774	43,346	39,417
Accumulated Impairments	(7,655)	(13,704)	(7,655)
Goodwill	33,119	29,642	31,762
Increase (decrease) due to:
Acquisition	55	4,847
Sales and dispositions	0	(202)
Impairments	0	(349)
Translation adjustments	(1,335)	(778)
Other	¥ (77)	¥ (41)

Accumulated impairments.

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Balance

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Goodwill Gross.

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The increase (decrease) to the recorded value of goodwill for foreign currency translation adjustments.

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Increase decrease due to acquisition, disposition, impairments, translation adjustments, other.

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Other Adjustment Goodwill.

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Carrying amount as of the balance sheet date, which is the cumulative amount paid, adjusted for any amortization recognized prior to adoption of FAS 142 and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43

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The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e(1)

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Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e(2)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 47
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 20

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Write-off of the carrying amount of goodwill associated with all or a portion of a reporting unit that is sold in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e(3)

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