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Other Financial Statement Details - Property, Plant and Equipment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 3,952.4		$ 3,952.4		$ 3,829.1
Less: accumulated depreciation and amortization	2,745.5		2,745.5		2,651.2
Total property, plant and equipment, net	1,206.9		1,206.9		1,177.9
Depreciation expense	47.0	$ 63.6	97.5	$ 135.3
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	89.3		89.3		89.3
Building and building improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	746.6		746.6		716.4
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	2,743.9		2,743.9		2,669.1
Projects in process
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 372.6		$ 372.6		$ 354.3

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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