Business Combinations (Acquisition Expenses And Related Adjustments By Segment) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total Acquisition and Integration Related Costs	$ (9)	$ 31	$ 43
Corporate - Other Income	0	0	(16)
Corporate - Interest Expense	11	0	25
Total Acquisition Expenses and Related Adjustments	2	31	52
Distribution Solutions [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total Acquisition and Integration Related Costs	47	24	41
Technology Solutions [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total Acquisition and Integration Related Costs	8	6	0
Corporate [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total Acquisition and Integration Related Costs	(64)	1	2
Corporate - Other Income	0	0	(16)
Corporate [Member] | Bridge Loan [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Corporate - Interest Expense		0
Corporate [Member] | Bridge Loan [Member] | PSS World Medical [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Corporate - Interest Expense	11
Corporate [Member] | Bridge Loan [Member] | US Oncology Holdings Incorporation [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Corporate - Interest Expense			25
Total of Reportable Segments [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total Acquisition and Integration Related Costs	$ (9)	$ 31	$ 43