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Share-Based Payments (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Share-based Compensation Expense included in consolidated statements of income |  |
Share-based compensation expense | $ (72.6) | $ (69.2)
Subtotal | 78.5 | 76.4
Capitalized share-based compensation costs | (2.6) | (1.5)
Share-based compensation expense included in total costs and expenses | 75.9 | 74.9
Income tax effect | (14.0) | (13.3)
Research and development |  |
Share-based Compensation Expense included in consolidated statements of income |  |
Share-based compensation expense | 33.6 | 33.3
Selling, general and administrative |  |
Share-based Compensation Expense included in consolidated statements of income |  |
Share-based compensation expense | 44.9 | 43.1
Total share-based compensation expense, net of tax |  |
Share-based Compensation Expense included in consolidated statements of income |  |
Share-based compensation expense | $ 61.9 | $ 61.6

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