CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenues	$ 49,733	$ 47,546
Cost of Sales	(46,826)	(44,698)
Gross Profit	2,907	2,848
Operating Expenses	(1,935)	(1,917)
Operating Income	972	931
Other Income, Net	19	13
Interest Expense	(79)	(89)
Income from Continuing Operations Before Income Taxes	912	855
Income Tax Expense	(239)	(256)
Income from Continuing Operations	673	599
Loss from Discontinued Operations, Net of Tax	(113)	(10)
Net Income	560	589
Net Income Attributable to Noncontrolling Interests	(18)	(13)
Net Income Attributable to McKesson Corporation	$ 542	$ 576
Diluted
Continuing operations (in dollars per share)	$ 2.88	$ 2.50
Discontinued operations (in dollars per share)	(0.50)	(0.05)
Total (in dollars per share)	2.38	2.45
Basic
Continuing operations (in dollars per share)	2.91	2.53
Discontinued operations (in dollars per share)	(0.50)	(0.04)
Total (in dollars per share)	2.41	2.49
Dividends declared per common share (in dollars per share)	$ 0.28	$ 0.24
Weighted Average Common Shares
Diluted (in shares)	228	235
Basic (in shares)	225	232