CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019		Mar. 31, 2018
Cash flows from operating activities:
Net (loss) income	$ (5,358,000,000)	$ 1,262,000,000		$ 1,782,000,000	[1]
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	1,960,000,000	2,023,000,000		2,014,000,000	[1]
Goodwill impairment losses	6,794,000,000	0		0	[1]
Operating right-of-use expense	698,000,000	0		0	[1]
Pension & other post-employment benefits, actuarial & settlement (gains) losses	(244,000,000)	143,000,000		(220,000,000)	[1]
Share-based compensation	68,000,000	74,000,000		93,000,000	[1]
Deferred taxes	(56,000,000)	97,000,000		(842,000,000)	[1]
Loss (gain) on dispositions	1,000,000	(163,000,000)		4,000,000	[1]
Provision for losses on accounts receivable	3,000,000	(10,000,000)		45,000,000	[1]
Unrealized foreign currency exchange losses	24,000,000	30,000,000		22,000,000	[1]
Impairment losses and contract write-offs	30,000,000	0		41,000,000	[1]
Amortization of debt issuance costs and (premium) discount	(4,000,000)	(10,000,000)		(4,000,000)	[1]
Cash surrender value in excess of premiums paid	(12,000,000)	(11,000,000)		(11,000,000)	[1]
Other non-cash charges, net	0	11,000,000		4,000,000	[1]
Changes in assets and liabilities, net of effects of acquisitions and dispositions:
Decrease (increase) in receivables	269,000,000	(947,000,000)		(464,000,000)	[1]
Increase in prepaid expenses and other current assets	(229,000,000)	(632,000,000)		(196,000,000)	[1]
Decrease in accounts payable and accruals	(565,000,000)	(52,000,000)		(96,000,000)	[1]
(Decrease) increase in income taxes payable and income tax liability	(197,000,000)	(107,000,000)		303,000,000	[1]
Decrease in operating lease liability	(698,000,000)	0		0	[1]
(Decrease) increase in advance contract payments and deferred revenue	(146,000,000)	(74,000,000)		130,000,000	[1]
Other operating activities, net	12,000,000	149,000,000		(38,000,000)	[1]
Net cash provided by operating activities	2,350,000,000	1,783,000,000		2,567,000,000	[1]
Cash flows from investing activities:
Purchases of property and equipment	(350,000,000)	(297,000,000)		(224,000,000)	[1]
Payments for transition and transformation contract costs	(281,000,000)	(394,000,000)		(328,000,000)	[1]
Software purchased and developed	(235,000,000)	(261,000,000)		(211,000,000)	[1]
Business dispositions	0	(65,000,000)		0	[1]
Cash collections related to deferred purchase price receivable	671,000,000	1,084,000,000		685,000,000	[1]
Proceeds from sale of assets	73,000,000	357,000,000		58,000,000	[1]
Short-term investing	(75,000,000)	0		0	[1]
Proceeds from short-term investing	38,000,000	0		0
Other investing activities, net	19,000,000	10,000,000		4,000,000	[1]
Net cash (used in) provided by investing activities	(2,137,000,000)	69,000,000		719,000,000	[1]
Cash flows from financing activities:
Borrowings of commercial paper	4,939,000,000	2,747,000,000		2,413,000,000	[1]
Repayments of commercial paper	(5,076,000,000)	(2,840,000,000)		(2,297,000,000)	[1]
Borrowings under lines of credit	1,500,000,000	0		0	[1]
Repayment of borrowings under lines of credit	0	0		(737,000,000)	[1]
Borrowings on long-term debt, net of discount	2,198,000,000	1,646,000,000		621,000,000	[1]
Principal payments on long-term debt	(1,039,000,000)	(2,625,000,000)		(1,547,000,000)	[1]
Payments on finance leases and borrowings for asset financing	(865,000,000)	(944,000,000)		(1,060,000,000)	[1]
Borrowings for USPS spin transaction	0	1,114,000,000		0	[1]
Proceeds from bond issuance	0	753,000,000		989,000,000	[1]
Proceeds from stock options and other common stock transactions	11,000,000	47,000,000		138,000,000	[1]
Taxes paid related to net share settlements of share-based compensation awards	(16,000,000)	(54,000,000)		(76,000,000)	[1]
Repurchase of common stock and advance payment for accelerated share repurchase	(736,000,000)	(1,344,000,000)		(132,000,000)	[1]
Dividend payments	(214,000,000)	(210,000,000)		(174,000,000)	[1]
Other financing activities, net	(45,000,000)	47,000,000		(28,000,000)	[1]
Net cash provided by (used in) financing activities	657,000,000	(1,663,000,000)		(1,890,000,000)	[1]
Effect of exchange rate changes on cash and cash equivalents	(90,000,000)	(19,000,000)		65,000,000	[1]
Net increase in cash and cash equivalents	780,000,000	170,000,000		1,461,000,000	[1]
Cash and cash equivalents at beginning of year	2,899,000,000	2,729,000,000	[1]	1,268,000,000	[1]
Cash and cash equivalents at end of year	3,679,000,000	2,899,000,000		2,729,000,000	[1]
Hewlett Packard Enterprise Services
Cash flows from investing activities:
Cash acquired through HPES Merger	0	0		938,000,000	[1]
Acquisitions Other Than Hewlett Packard Enterprise Services
Cash flows from investing activities:
Payments for acquisitions, net of cash acquired	$ (1,997,000,000)	$ (365,000,000)		$ (203,000,000)	[1]

[1] As a result of the USPS Separation, the Consolidated Statements of Operations, Consolidated Balance Sheets, and related financial information reflect USPS's operations and assets and liabilities as discontinued operations for all periods presented. The cash flows of USPS have not been segregated and are included in the Consolidated Statement of Cash flows for the fiscal year ended March 31, 2018 and through the separation date of May 31, 2018 in the Consolidated Statement of Cash Flows for the fiscal year ended March 31, 2019.