Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
OPERATING ACTIVITIES
Net income (loss)	$ 550	$ 2,275
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation, amortization and accretion	77	72
Stock-based compensation	215	165
Change in assets and liabilities:
Receivables, net	39	(235)
Other assets	(113)	33
Accounts payable	106	51
Accrued and other liabilities	(96)	88
Deferred income taxes, net	(32)	(1,800)
Deferred net revenue (online-enabled games)	(307)	(454)
Net cash provided by operating activities	439	195
INVESTING ACTIVITIES
Capital expenditures	(63)	(72)
Proceeds from maturities and sales of short-term investments	1,418	793
Purchase of short-term investments	(1,416)	(1,984)
Net cash used in investing activities	(61)	(1,263)
FINANCING ACTIVITIES
Proceeds from issuance of common stock	43	33
Cash paid to taxing authorities for shares withheld from employees	(77)	(55)
Repurchase and retirement of common stock	(78)	(611)
Payment for Contingent Consideration Liability, Financing Activities	0	64
Net cash used in financing activities	(112)	(697)
Effect of foreign exchange on cash and cash equivalents	25	(3)
Increase (decrease) in cash and cash equivalents	291	(1,768)
Beginning cash and cash equivalents	3,768	4,708
Ending cash and cash equivalents	4,059	2,940
Supplemental cash flow information:
Cash paid during the period for income taxes, net	173	77
Cash paid during the period for interest	21	21
Non-cash Investing activities
Change in accrued capital expenditures	$ (4)	$ (16)