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Share-Based Compensation - Equity Incentive Plans, Stock Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Pre-tax effect of share-based compensation	$ 52.9	$ 44.0
Income tax benefit	10.9	9.2
Net income effect of share-based compensation	42.0	34.8
Capitalized share-based compensation expense	3.6	5.0
Share-based compensation expense previously capitalized	7.7	6.6
Amortization expense charged to cost of sales
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Pre-tax effect of share-based compensation	7.7	6.6
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Pre-tax effect of share-based compensation	29.1	23.3
Selling, general and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Pre-tax effect of share-based compensation	$ 16.1	$ 14.1

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- Definition

The amount of share-based compensation expense recognized during the period that was previously capitalized to inventory.

+ References

No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-Section 50
-Paragraph 2
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Amount, after tax, of expense for award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
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Amount of cost capitalized for award under share-based payment arrangement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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