Share-Based Payments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Expense included in consolidated statements of income
Share-based compensation expense	$ (191.2)	$ (168.7)		$ 138.1
Subtotal	225.4	181.6	$ 169.7
Capitalized share-based compensation costs	(8.9)	(11.5)	(9.6)
Share-based compensation expense included in total costs and expenses	216.5	170.1	160.1
Income tax effect	(35.7)	(27.5)	(42.8)
Research and development
Share-based Compensation Expense included in consolidated statements of income
Share-based compensation expense	(77.1)	(75.8)	(74.0)
Selling, general and administrative
Share-based Compensation Expense included in consolidated statements of income
Share-based compensation expense	(148.3)	(105.8)	(95.7)
Total share-based compensation expense, net of tax
Share-based Compensation Expense included in consolidated statements of income
Share-based compensation expense	$ (180.8)	$ (142.6)	$ (117.3)