REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue from External Customer [Line Items]
Total net revenue	$ 1,353.1	$ 1,299.2	$ 2,691.3	$ 2,583.9
Recurrent consumer spending
Revenue from External Customer [Line Items]
Total net revenue	1,079.0	1,000.4	2,176.7	2,068.8
Full game and other
Revenue from External Customer [Line Items]
Total net revenue	274.1	298.8	514.6	515.1
Mobile
Revenue from External Customer [Line Items]
Total net revenue	740.2	646.2	1,462.7	1,326.2
Console
Revenue from External Customer [Line Items]
Total net revenue	491.1	546.7	1,000.0	1,051.0
PC and other
Revenue from External Customer [Line Items]
Total net revenue	121.8	106.3	228.6	206.7
Digital online
Revenue from External Customer [Line Items]
Total net revenue	1,300.0	1,239.7	2,595.5	2,479.7
Physical retail and other
Revenue from External Customer [Line Items]
Total net revenue	53.1	59.5	95.8	104.2
Over time
Revenue from External Customer [Line Items]
Total net revenue	1,086.3	1,006.6	2,213.9	2,086.4
Point in time
Revenue from External Customer [Line Items]
Total net revenue	$ 266.8	$ 292.6	$ 477.4	$ 497.5