Business Combinations (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended		1 Months Ended		1 Months Ended			3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Feb. 28, 2013 PSS World Medical [Member]	Feb. 22, 2013 PSS World Medical [Member]	Feb. 28, 2013 PSS World Medical [Member] Amounts Recognized as of Acquisition Date as Adjusted [Member]	Sep. 30, 2013 PSS World Medical [Member] Amounts Recognized as of Acquisition Date as Adjusted [Member]	Feb. 22, 2013 PSS World Medical [Member] Amounts Recognized as of Acquisition Date as Adjusted [Member]	Jun. 30, 2013 Corporate Headquarters [Member]	Apr. 06, 2012 Corporate Headquarters [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition					Feb. 22, 2013					Apr. 06, 2012
Name of Acquired Entity					PSS World Medical, Inc. (“PSS World Medical”)
Per Share Price of Outstanding Shares Acquired						$ 29.00
Purchase Price for Acquisition					$ 1,900,000,000
Cash Paid for Acquisition							1,300,000,000			90,000,000
Current Portion of Long-Term Debt Acquired								635,000,000	600,000,000
Description of Acquired Entity					PSS World Medical markets and distributes medical products and services throughout the United States
Currently acquired percentage of building											50.00%
Previously Held Percentage of Building											50.00%
Gain on Business Combination	0	0	0	81,000,000						81,000,000
Gain on Business Combination, Net of Tax										51,000,000
Fair value of assets acquired											180,000,000
Fair value of assets acquired, Buildings											113,000,000
Fair value of assets acquired, Land											$ 58,000,000
Property, Plant and Equipment, Useful Life										30 years