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, 2014	Mar. 31, 2013
Goodwill [Line Items]
Goodwill, Beginning balance		$ 6,405	$ 5,032
Goodwill, Acquired During Period		3,649	1,421
Amount reclassified to assets held-for-sale		(128)
Goodwill, Impairment Loss			(36)
Acquisition Accounting and Other Adjustments		1	5
Foreign Currency Translation Adjustments		0	(17)
Goodwill, Ending balance	6,405	9,927	6,405
Distribution Solutions [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		4,413	3,190
Goodwill, Acquired During Period		3,649	1,228
Amount reclassified to assets held-for-sale		(1)
Goodwill, Impairment Loss			0
Acquisition Accounting and Other Adjustments		13	6
Foreign Currency Translation Adjustments		4	(11)
Goodwill, Ending balance	4,413	8,078	4,413
Technology Solutions [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		1,992	1,842
Goodwill, Acquired During Period		0	193
Amount reclassified to assets held-for-sale		(127)
Goodwill, Impairment Loss	(36)		(36)
Acquisition Accounting and Other Adjustments		(12)	(1)
Foreign Currency Translation Adjustments		(4)	(6)
Goodwill, Ending balance	$ 1,992	$ 1,849	$ 1,992