Balance Sheet Details (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Deferred Revenue Arrangement [Line Items]
Depreciation expense	$ 49	$ 45	$ 98	$ 89
Recognition of revenue deferral			1,762	$ 1,951
Unsatisfied Performance Obligations
Deferred Revenue Arrangement [Line Items]
Revenue, remaining performance obligation, amount	27		27
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
Deferred Revenue Arrangement [Line Items]
Revenue, remaining performance obligation, amount	$ 18		$ 18
Revenue, remaining performance obligation, expected timing of satisfaction, period	12 months		12 months
Total deferred revenue
Deferred Revenue Arrangement [Line Items]
Revenue, remaining performance obligation, amount	$ 1,673		$ 1,673