Other Financial Statement Details - Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 3,710.5	$ 3,526.1
Less: accumulated depreciation and amortization	2,603.8	2,342.4
Total property, plant and equipment, net	1,106.7	1,183.7
Depreciation expense	155.0	165.8	$ 190.4
Capital-related grants
Property, Plant and Equipment [Line Items]
Capital-related grants - reduction to property, plant and equipment	52.2	46.4
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	99.7	84.8
Building and building improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	711.0	705.9
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	2,470.3	2,311.3
Projects in process
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 429.5	$ 424.1

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