Business Combinations (Fair Value Of Assets Acquired And Liabilities Assumed) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Feb. 06, 2014 Amounts Previously Recognized As Of Acquisition Date Celesio [Member]		Jun. 30, 2014 Purchase Price Allocation Adjustments Celesio [Member]	Jun. 30, 2014 Amounts Recognized As Of Acquisition Date As Adjusted Celesio [Member]
Business Acquisition [Line Items]
Receivables			$ 3,425	[1]	$ (3)	$ 3,422
Other current assets, net of cash and cash equivalents acquired			2,413	[1]	(3)	2,410
Goodwill	10,431	9,927	3,570	[1]	436	4,006
Intangible assets			3,018	[1]	(536)	2,482
Other long-term assets			1,272	[1]	(44)	1,228
Current liabilities			(4,096)	[1]	(6)	(4,102)
Short-term borrowings and current portion of long-term debt			(1,990)	[1]	0	(1,990)
Long-term debt			(322)	[1]	0	(322)
Other long-term liabilities			(1,293)	[1]	156	(1,137)
Fair value of net assets, less cash and cash equivalents			5,997	[1]	0	5,997
Less: Noncontrolling Interests			(1,500)	[1]	0	(1,500)
Net assets acquired, less cash and cash equivalents			$ 4,497	[1]	$ 0	$ 4,497

[1] (1)As previously reported in our Form 10-K for the year ended March 31, 2014.