Income Taxes (Schedule of Reconciliation of Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax at the U.S. federal statutory tax rate	$ 1,518.3	$ 1,105.8	$ 772.8
Add (deduct):
International operations, including Puerto Rico	(297.1)	(242.0)	(627.1)
General business credits	(97.9)	(108.8)	(87.4)
Non-deductible acquired IPR&D	63.2	0.0	309.9
2017 Tax Act	0.0	0.0	175.3
Other	(150.3)	(127.0)	(14.0)
Income taxes	$ 1,036.2	$ 628.0	$ 529.5