CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES
Net income (loss)	$ 882	$ (5,053)
Adjustments to reconcile to net cash provided by operating activities:
Depreciation	215	237
Amortization	383	429
Goodwill and long-lived asset impairment charges	128	236
Deferred taxes	12	(1,520)
Credits associated with last-in, first-out inventory method	(79)	(115)
Non-cash operating lease expense	198	264
Loss (gain) from sales of businesses and investments	(117)	50
European businesses held for sale	1,271	0
Other non-cash items	452	67
Changes in assets and liabilities, net of acquisitions:
Receivables	(1,925)	1,500
Inventories	(1,659)	(2,046)
Drafts and accounts payable	1,612	(1,240)
Operating lease liabilities	(276)	(291)
Taxes	176	184
Litigation liabilities	146	8,067
Other	128	403
Net cash provided by operating activities	1,547	1,172
INVESTING ACTIVITIES
Payments for property, plant, and equipment	(253)	(293)
Capitalized software expenditures	(127)	(134)
Acquisitions, net of cash, cash equivalents, and restricted cash acquired	(6)	(33)
Proceeds from sales of businesses and investments, net	197	325
Other	(83)	(75)
Net cash used in investing activities	(272)	(210)
FINANCING ACTIVITIES
Proceeds from short-term borrowings	3,642	5,455
Repayments of short-term borrowings	(3,270)	(5,303)
Proceeds from issuances of long-term debt	498	500
Repayments of long-term debt	(1,646)	(1,030)
Payments for debt extinguishments	(184)	0
Common stock transactions:
Issuances	174	55
Share repurchases	(1,986)	(500)
Dividends paid	(206)	(209)
Exercise of put right by noncontrolling shareholders of McKesson Europe AG	(1,031)	(49)
Other	(323)	(95)
Net cash used in financing activities	(4,332)	(1,176)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	35	(77)
Cash, cash equivalents, and restricted cash classified within Assets held for sale	(215)	0
Net decrease in cash, cash equivalents, and restricted cash	(3,237)	(291)
Cash, cash equivalents, and restricted cash at beginning of period	6,396	4,023
Cash, cash equivalents, and restricted cash at end of period	3,159	3,732
Less: Restricted cash at end of period included in Prepaid expenses and other	(405)	(155)
Cash and cash equivalents at end of period	$ 2,754	$ 3,577