REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Revenue from External Customer [Line Items]
Total net revenue	$ 1,503.8	$ 1,338.2
Recurrent consumer spending
Revenue from External Customer [Line Items]
Total net revenue	1,256.1	1,097.7
Full game and other
Revenue from External Customer [Line Items]
Total net revenue	247.7	240.5
Mobile
Revenue from External Customer [Line Items]
Total net revenue	801.7	722.5
Console
Revenue from External Customer [Line Items]
Total net revenue	550.6	508.9
PC and other
Revenue from External Customer [Line Items]
Total net revenue	151.5	106.8
Digital online
Revenue from External Customer [Line Items]
Total net revenue	1,476.6	1,295.5
Physical retail and other
Revenue from External Customer [Line Items]
Total net revenue	27.2	42.7
Over time
Revenue from External Customer [Line Items]
Total net revenue	1,262.9	1,127.6
Point in time
Revenue from External Customer [Line Items]
Total net revenue	$ 240.9	$ 210.6