Goodwill and Intangible Assets, Net (Changes In The Carrying Amount Of Goodwill) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2012
Goodwill [Line Items]
Goodwill, Beginning balance		$ 5,032	$ 4,364
Goodwill Acquired		1,421	662
Goodwill, Impairment Loss	36	36
Acquisition Accounting and Other Adjustments		5	20
Foreign Currency Translation Adjustments		(17)	(14)
Goodwill, Ending balance	6,405	6,405	5,032
Distribution Solutions [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		3,190	2,662
Goodwill Acquired		1,228	511
Goodwill, Impairment Loss		0
Acquisition Accounting and Other Adjustments		6	20
Foreign Currency Translation Adjustments		(11)	(3)
Goodwill, Ending balance	4,413	4,413	3,190
Technology Solutions [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		1,842	1,702
Goodwill Acquired		193	151
Goodwill, Impairment Loss	36	36
Acquisition Accounting and Other Adjustments		(1)	0
Foreign Currency Translation Adjustments		(6)	(11)
Goodwill, Ending balance	$ 1,992	$ 1,992	$ 1,842