Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Net Cash Provided by Operating Activities [Abstract]
Net income	$ 789	$ 837	$ 3,039
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities [Abstract]
Depreciation, amortization and accretion	486	181	150
Acquisition-related contingent consideration	0	0	5
Stock-based compensation	528	435	347
Increase (Decrease) in Operating Capital [Abstract]
Receivables, net	(77)	(41)	164
Other assets	(157)	(70)	35
Accounts payable	(7)	18	(36)
Accrued and other liabilities	169	136	119
Deferred income taxes, net	(329)	(143)	(1,871)
Deferred net revenue (online-enabled games)	497	581	(155)
Net Cash Provided by Operating Activities	1,899	1,934	1,797
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures	(188)	(124)	(140)
Proceeds from maturities and sales of short-term investments	1,329	3,686	2,142
Purchase of short-term investments	(554)	(2,828)	(3,359)
Acquisition, net of cash acquired	(3,391)	(1,239)	0
Net Cash Provided by (Used in) Investing Activities	(2,804)	(505)	(1,357)
Net Cash Used in Financing Activities [Abstract]
Proceeds from Debt, Net of Issuance Costs	0	1,478	0
Repayments of Senior Debt	0	(600)	0
Proceeds from issuance of common stock	77	86	62
Payments of Dividends	(193)	(98)	0
Cash paid to taxing authorities for shares withheld from employees	(204)	(152)	(91)
Repurchase and retirement of common stock	(1,300)	(729)	(1,207)
Payment for Contingent Consideration Liability, Financing Activities	0	0	(122)
Net Cash Used in Financing Activities, Total	(1,620)	(15)	(1,358)
Effect of foreign exchange on cash and cash equivalents	(3)	78	(22)
Increase (decrease) in cash and cash equivalents	(2,528)	1,492	(940)
Beginning cash and cash equivalents	5,260	3,768	4,708
Ending cash and cash equivalents	2,732	5,260	3,768
Supplemental Cash Flow Information [Abstract]
Cash paid during the year for income taxes, net	629	340	170
Cash paid during the year for interest	56	40	42
Non-cash investing activities:
Capital Expenditures Incurred but Not yet Paid	$ (19)	$ (17)	$ (8)