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Share-Based Compensation - Share-Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Pre-tax effect of share-based compensation	$ 45.4	$ 41.3	$ 89.9	$ 82.5
Income tax benefit	9.6	8.8	19.0	17.6
Net income effect of share-based compensation	35.8	32.5	70.9	64.9
Inventory
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Capitalized share-based compensation expense	4.7	4.7	9.9	9.5
Share-based compensation expense previously capitalized	7.4	6.5	14.2	14.2
Cost of sales
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Pre-tax effect of share-based compensation	7.4	6.5	14.2	14.2
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Pre-tax effect of share-based compensation	23.7	19.8	46.6	39.9
Selling, general and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Pre-tax effect of share-based compensation	$ 14.3	$ 15.0	$ 29.1	$ 28.4

X

- 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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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 S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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Amount, after tax, of expense for award under share-based payment arrangement.

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Amount of cost capitalized for award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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