Other Financial Statement Details - Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 4,013.3	$ 3,829.1
Less: accumulated depreciation and amortization	2,818.7	2,651.2
Total property, plant and equipment, net	1,194.6	1,177.9
Depreciation expense	190.4	244.7	$ 209.1
Capital-Related Grants
Property, Plant and Equipment [Line Items]
Capital-related grants	126.5	81.0
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	89.3	89.3
Building and building improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	796.3	716.4
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	2,778.1	2,669.1
Projects in process
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 349.6	$ 354.3