For each income statement presented, the amount charged to expense for write-downs of capitalized computer software costs to net realizable value.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756

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

-Publisher FASB

-Name Implementation Guide (Q and A)

-Number FAS86

-Paragraph 18

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 86

-Paragraph 11

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

Name:	us-gaap_CapitalizedComputerSoftwareImpairments
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Segment Information (Narrative) (Details) (USD $) In Millions	3 Months Ended			6 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Segment Information
Litigation charges	$ 118		$ 24	$ 118	$ 24
Asset impairment charge - capitalized software held for sale					72
Distribution Solutions [Member] \| Average Wholesale Price Litigation [Member]
Segment Information
Litigation charges	118	189	24	118	24
Technology Solutions [Member]
Segment Information
Asset impairment charge - capitalized software held for sale			72		72
Distribution Solutions [Member]
Segment Information
Percentage of revenue derived from services for Distributions Solutions segment	less than 2%		less than 2%	less than 2%	less than 2%
Antitrust Class Action Lawsuit [Member]
Segment Information
Share of a settlement of an antitrust class action lawsuit					$ 51