Income Taxes (Schedule of Reconciliation of Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax at the U.S. federal statutory tax rate									$ 1,105.8	$ 772.8	$ 806.7
Add (deduct):
International operations, including Puerto Rico									(242.0)	(627.1)	(480.8)
General business credits									(108.8)	(87.4)	(66.8)
Non-deductible acquired IPR&D									0.0	309.9	300.1
2017 Tax Act									0.0	175.3	1,914.0
Other									(127.0)	(14.0)	(82.0)
Income taxes	$ 167.4	$ 151.9	$ 138.7	$ 170.0	$ (189.8)	$ 247.5	$ 273.3	$ 198.5	$ 628.0	$ 529.5	$ 2,391.2