Long-Lived Assets 4 (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Mar. 31, 2012
Amortization expense over the next five fiscal years
2013	$ 313
2014	284
2015	239
2016	193
2017	140
Purchased software products [Member]
Amortization expense over the next five fiscal years
2013	106
2014	98
2015	87
2016	86
2017	84
Internally developed software products [Member]
Amortization expense over the next five fiscal years
2013	153
2014	138
2015	112
2016	81
2017	47
Other intangible assets subject to amortization [Member]
Amortization expense over the next five fiscal years
2013	54
2014	48
2015	40
2016	26
2017	$ 9

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The amount of amortization expense expected to be recognized during year five of the five succeeding fiscal years.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275

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The amount of amortization expense expected to be recognized during year four of the five succeeding fiscal years.

+ References

+ Details

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- Definition

The amount of amortization expense expected to be recognized during year one of the five succeeding fiscal years.

+ References

+ Details

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- Definition

The amount of amortization expense expected to be recognized during year three of the five succeeding fiscal years.

+ References

+ Details

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- Definition

The amount of amortization expense expected to be recognized during year two of the five succeeding fiscal years.

+ References

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