Share-based Compensation (Schedule of Components of Allocated Share-Based Compensation Expense and Capitalization of Share Based Compensation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Period for rececognition for compensation cost not yet recognized of non-vested awards	1 year 8 months 15 days
Total share-based compensation expense	$ 237.0	$ 203.0	$ 243.1
Income tax effect	(55.0)	(46.5)	(89.3)
Total share-based compensation expense, net of tax	182.0	156.5	153.8
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation expense	14.1	16.0	11.1
Research and Development Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation expense	61.8	57.5	76.4
Selling, General and Administrative Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation expense	$ 161.1	$ 129.5	$ 155.6