Goodwill Capitalized Software and Other Intangible Assets 2 (Details) (USD $) In Millions	6 Months Ended
Sep. 30, 2011
Amortization expense over the next five fiscal years
2012	$ 281
2013	299
2014	269
2015	223
2016	176
Purchased software products [Member]
Amortization expense over the next five fiscal years
2012	102
2013	109
2014	101
2015	90
2016	88
Internally developed software products [Member]
Amortization expense over the next five fiscal years
2012	115
2013	137
2014	121
2015	95
2016	64
Other intangible assets subject to amortization [Member]
Amortization expense over the next five fiscal years
2012	64
2013	53
2014	47
2015	38
2016	$ 24

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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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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- Definition

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

+ Details

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