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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (PARENTHETICAL) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Allocated share based compensation expense | $ 43.5 | $ 39.6 | $ 129.5 | $ 127.5
Cost of sales |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Allocated share based compensation expense | 5.7 | 3.4 | 15.8 | 10.9
Research and development |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Allocated share based compensation expense | 21.2 | 19.4 | 63.0 | 53.2
Selling, general and administrative |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Allocated share based compensation expense | 16.6 | 16.6 | 50.7 | 46.1
Special charges (income) and other, net |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Allocated share based compensation expense | $ 0.0 | $ 0.2 | $ 0.0 | $ 17.3

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