CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net (loss) income	$ (146)	$ (5,358)	$ 1,262
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	1,988	1,960	2,023
Goodwill impairment losses	0	6,794	0
Operating right-of-use expense	616	698	0
Pension & other post-employment benefits, actuarial & settlement losses (gains)	519	(244)	143
Share-based compensation	56	68	74
Deferred taxes	(403)	(56)	97
(Gain) loss on dispositions	(1,983)	1	(163)
Provision for losses on accounts receivable	53	3	(10)
Unrealized foreign currency exchange (gains) losses	(36)	24	30
Impairment losses and contract write-offs	275	30	0
Debt extinguishment costs	41	0	0
Amortization of debt issuance costs and discount (premium)	3	(4)	(10)
Cash surrender value in excess of premiums paid	(3)	(12)	(11)
Other non-cash charges, net	1	0	11
Changes in assets and liabilities, net of effects of acquisitions and dispositions:
Decrease (increase) in receivables	257	269	(947)
Increase in prepaid expenses and other current assets	(299)	(229)	(632)
Decrease in accounts payable and accruals	(527)	(565)	(52)
Increase (decrease) in income taxes payable and income tax liability	434	(197)	(107)
Decrease in operating lease liability	(616)	(698)	0
Decrease in advance contract payments and deferred revenue	(66)	(146)	(74)
Other operating activities, net	(40)	12	149
Net cash provided by operating activities	124	2,350	1,783
Cash flows from investing activities:
Purchases of property and equipment	(261)	(350)	(297)
Payments for transition and transformation contract costs	(261)	(281)	(394)
Software purchased and developed	(254)	(235)	(261)
Proceeds (payments) for acquisitions, net of cash acquired	184	(1,997)	(365)
Business dispositions	4,947	0	(65)
Cash collections related to deferred purchase price receivable	159	671	1,084
Proceeds from sale of assets	164	73	357
Short-term investing	0	(75)	0
Proceeds from short-term investing	0	38	0
Other investing activities, net	(13)	19	10
Net cash provided by (used in) investing activities	4,665	(2,137)	69
Cash flows from financing activities:
Borrowings of commercial paper	1,486	4,939	2,747
Repayments of commercial paper	(1,852)	(5,076)	(2,840)
Borrowings under lines of credit	2,500	1,500	0
Repayment of borrowings under lines of credit	(4,000)	0	0
Borrowings on long-term debt	0	2,198	1,646
Principal payments on long-term debt	(3,552)	(1,039)	(2,625)
Payments on finance leases and borrowings for asset financing	(930)	(865)	(944)
Borrowings for USPS spin transaction	0	0	1,114
Proceeds from bond issuance	993	0	753
Proceeds from stock options and other common stock transactions	1	11	47
Taxes paid related to net share settlements of share-based compensation awards	(7)	(16)	(54)
Repurchase of common stock and advance payment for accelerated share repurchase	0	(736)	(1,344)
Dividend payments	(53)	(214)	(210)
Payments for debt extinguishment costs	(41)	0	0
Other financing activities, net	(21)	(45)	47
Net cash (used in) provided by financing activities	(5,476)	657	(1,663)
Effect of exchange rate changes on cash and cash equivalents	39	(90)	(19)
Net (decrease) increase in cash and cash equivalents including cash classified within current assets held for sale	(648)	780	170
Less: cash classified within current assets held for sale	(63)	0	0
Net (decrease) increase in cash and cash equivalents	(711)	780	170
Cash and cash equivalents at beginning of year	3,679	2,899	2,729
Cash and cash equivalents at end of year	$ 2,968	$ 3,679	$ 2,899