Net Sales (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Total net sales	$ 1,963.6	$ 1,569.4
Remaining performance obligation, expected to be recognized over next 12 months, percentage	55.00%
Semiconductor Products
Disaggregation of Revenue [Line Items]
Total net sales	$ 1,925.7	1,542.0
Deferred revenue	172.1		$ 117.6
Semiconductor Products | Accrued Liabilities
Disaggregation of Revenue [Line Items]
Deferred revenue	81.6		$ 73.2
Distributors
Disaggregation of Revenue [Line Items]
Total net sales	913.1	783.4
Direct customers
Disaggregation of Revenue [Line Items]
Total net sales	1,012.6	758.6
Licensees
Disaggregation of Revenue [Line Items]
Total net sales	37.9	27.4
Microcontrollers
Disaggregation of Revenue [Line Items]
Total net sales	1,063.0	902.5
Analog
Disaggregation of Revenue [Line Items]
Total net sales	580.0	432.1
Other
Disaggregation of Revenue [Line Items]
Total net sales	$ 320.6	$ 234.8