Royalties And Licenses (Narrative) (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended
Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2012 Commitment to pay content licensors, independent software developers and co-publishing and/or distribution affiliates	Jun. 30, 2012 Fiscal 2013 Restructuring	Jun. 30, 2011 Fiscal 2011 Restructuring	Jun. 30, 2012 Fiscal 2011 Restructuring
Royalties And Licenses
Loss on unrecognized minimum royalty				$ 9	$ 15
Royalty-related liabilities (including restructuring)	162	173		1		75
Committed to pay			$ 806

Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 5

-Article 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.15(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph a

-Article 7

Name:	us-gaap_AccruedRoyaltiesCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant