CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings/(Accumulated Deficit)	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Mar. 31, 2023		192.6
Beginning balance (in shares) at Mar. 31, 2023				(23.7)
Beginning balance at Mar. 31, 2023	$ 9,042.5	$ 1.9	$ 9,010.2	$ (1,020.6)	$ 1,164.3	$ (113.3)
Increase (Decrease) in Stockholders' Equity
Net loss	(749.6)				(749.6)
Change in cumulative foreign currency translation adjustment	(37.1)					(37.1)
Net unrealized gain on available-for-sale securities, net of taxes	1.3					1.3
Stock-based compensation	211.4		211.4
Issuance of restricted stock, net of forfeitures and cancellations (in shares)		1.3
Net share settlement of restricted stock awards (in shares)		(0.4)
Net share settlement of restricted stock awards	(57.1)		(57.1)
Employee share purchase plan settlement (in shares)		0.2
Employee share purchase plan settlement	18.5		18.5
Issuance of shares related to Zynga convertible notes (in shares)		0.1
Issuance of shares related to Zynga convertible notes	16.0		16.0
Issuance of shares related to Gearbox acquisition (in shares)		2.8
Issuance of shares related to Gearbox acquisition	448.6		448.6
Exercise of stock options	0.2		0.2
Ending balance (in shares) at Sep. 30, 2023		193.7
Ending balance (in shares) at Sep. 30, 2023				(23.7)
Ending balance at Sep. 30, 2023	8,430.1	$ 1.9	9,183.2	$ (1,020.6)	414.7	(149.1)
Beginning balance (in shares) at Jun. 30, 2023		193.5
Beginning balance (in shares) at Jun. 30, 2023				(23.7)
Beginning balance at Jun. 30, 2023	8,940.2	$ 1.9	9,087.0	$ (1,020.6)	958.3	(86.4)
Increase (Decrease) in Stockholders' Equity
Net loss	(543.6)				(543.6)
Change in cumulative foreign currency translation adjustment	(63.1)					(63.1)
Net unrealized gain on available-for-sale securities, net of taxes	0.4					0.4
Stock-based compensation	112.0		112.0
Issuance of restricted stock, net of forfeitures and cancellations (in shares)		0.3
Net share settlement of restricted stock awards (in shares)		(0.1)
Net share settlement of restricted stock awards	(15.8)		(15.8)
Ending balance (in shares) at Sep. 30, 2023		193.7
Ending balance (in shares) at Sep. 30, 2023				(23.7)
Ending balance at Sep. 30, 2023	$ 8,430.1	$ 1.9	9,183.2	$ (1,020.6)	414.7	(149.1)
Beginning balance (in shares) at Mar. 31, 2024	170.8	194.5
Beginning balance (in shares) at Mar. 31, 2024	(23.7)			(23.7)
Beginning balance at Mar. 31, 2024	$ 5,667.9	$ 1.9	9,371.6	$ (1,020.6)	(2,579.9)	(105.1)
Increase (Decrease) in Stockholders' Equity
Net loss	(627.5)				(627.5)
Change in cumulative foreign currency translation adjustment	66.2					66.2
Net unrealized gain on available-for-sale securities, net of taxes	0.0
Stock-based compensation	203.5		203.5
Issuance of restricted stock, net of forfeitures and cancellations (in shares)		1.6
Other changes, net	0.5	$ 0.1	0.4
Employee share purchase plan settlement (in shares)		0.2
Employee share purchase plan settlement	$ 23.3		23.3
Ending balance (in shares) at Sep. 30, 2024	175.5	199.2
Ending balance (in shares) at Sep. 30, 2024	(23.7)			(23.7)
Ending balance at Sep. 30, 2024	$ 5,798.5	$ 2.0	10,063.4	$ (1,020.6)	(3,207.4)	(38.9)
Beginning balance (in shares) at Jun. 30, 2024		198.8
Beginning balance (in shares) at Jun. 30, 2024				(23.7)
Beginning balance at Jun. 30, 2024	5,991.5	$ 2.0	9,962.5	$ (1,020.6)	(2,841.9)	(110.5)
Increase (Decrease) in Stockholders' Equity
Net loss	(365.5)				(365.5)
Change in cumulative foreign currency translation adjustment	71.6					71.6
Net unrealized gain on available-for-sale securities, net of taxes	0.0
Stock-based compensation	106.3		106.3
Issuance of restricted stock, net of forfeitures and cancellations (in shares)		0.4
Other changes, net	$ (5.4)		(5.4)
Issuance of shares related to Zynga convertible notes (in shares)		0.1
Ending balance (in shares) at Sep. 30, 2024	175.5	199.2
Ending balance (in shares) at Sep. 30, 2024	(23.7)			(23.7)
Ending balance at Sep. 30, 2024	$ 5,798.5	$ 2.0	$ 10,063.4	$ (1,020.6)	$ (3,207.4)	$ (38.9)