Share-Based Payments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Expense included in consolidated statements of income
Share-based compensation expense	$ (58.0)	$ (55.8)	$ (128.4)	$ (128.4)
Subtotal	59.1	59.4	130.9	137.9
Capitalized share-based compensation costs	(2.3)	(1.7)	(5.1)	(4.3)
Share-based compensation expense included in total costs and expenses	56.8	57.7	125.8	133.6
Income tax effect	(10.2)	(10.9)	(23.0)	(24.9)
Research and development
Share-based Compensation Expense included in consolidated statements of income
Share-based compensation expense	22.4	19.1	48.1	52.7
Selling, general and administrative
Share-based Compensation Expense included in consolidated statements of income
Share-based compensation expense	36.7	40.3	82.8	85.2
Total share-based compensation expense, net of tax
Share-based Compensation Expense included in consolidated statements of income
Share-based compensation expense	$ 46.6	$ 46.8	$ 102.8	$ 108.7