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Stock-Based Compensation And Employee Benefit Plans - Narrative (Details) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024 USD ($) plan $ / shares shares	Mar. 31, 2023 USD ($) $ / shares	Mar. 31, 2022 USD ($) $ / shares	May 22, 2024 USD ($)	Nov. 30, 2020 USD ($)	Nov. 04, 2020 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive plans \| plan	2
Share-based compensation arrangement by share-based payment award, expiration period	10 years
Deferred income tax expense (benefit)	$ 82.0	$ (213.0)	$ (328.0)
Deferred compensation plan assets	30.0	23.0
Deferred compensation liability, classified, noncurrent	31.0	24.0
Deferred compensation arrangement with individual, contributions by employer	39.0	42.0	41.0
November 2020 Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount					$ 2,600.0
August 2022 Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount						$ 2,600.0
May 2024 Repurchase Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount				$ 5,000.0
Stock-based compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred income tax expense (benefit)	$ 79.0	72.0	68.0
Vesting Year3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff vesting period	35 months
Vesting Year4 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff vesting period	4 years
2019 Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage allowed of exercise price of stock options compared to fair market value on date of grant	100.00%
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant (in shares) \| shares	15.9
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value	$ 10.0	$ 15.0	$ 8.0
Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant (in shares) \| shares	11.1
Reduction in shares available per grant of stock right (in shares)	1.43
Granted \| $ / shares	$ 129.30	$ 126.41	$ 136.78
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period, fair value	$ 519.0	$ 460.0	$ 457.0
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	1 year 8 months 12 days
Restricted Stock Rights (including Glu's related grant) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted \| $ / shares	$ 129.30
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted \| $ / shares	$ 128.66	$ 127.98	$ 140.48
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period, fair value	$ 11.0	$ 9.0	$ 38.0
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized	$ 12.0
Market Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted \| $ / shares	$ 152.92	$ 176.70	$ 170.44
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period, fair value	$ 4.0	$ 12.0	$ 37.0
Measurement period of shares received at vesting based on total stock return measurement	3 years
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized	$ 12.0
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted \| $ / shares	$ 30.82	$ 33.91	$ 35.94
Measurement period of shares received at vesting based on total stock return measurement	6 months
Minimum percentage that employees authorized for payroll deductions	2.00%
Maximum percentage that employees authorized for payroll deductions	10.00%
Share-based compensation arrangement by share-based payment award, discount from market price, offering date	85.00%
Number of shares available for grant, employee stock purchase plans (in shares) \| shares	2.8
Stock-based compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized	$ 734.0
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized	$ 710.0
Maximum \| 2019 Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant (in shares) \| shares	29.5
Maximum \| Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage range of shares received at vesting based on total stock return measurement	200.00%
Maximum \| Market Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage range of shares received at vesting based on total stock return measurement	200.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement periods for performance based restricted stock	3 years
Minimum \| Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage range of shares received at vesting based on total stock return measurement	0.00%
Minimum \| Market Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage range of shares received at vesting based on total stock return measurement	0.00%