Income Taxes (Schedule of Future Cash Payments Relating to the Toll Tax) (Details) $ in Millions	Dec. 31, 2020 USD ($)
Tax Cut And Jobs Act, Toll Tax, Payment, Due [Abstract]
Total	$ 2,403.1
Less than 1 Year	253.7
1-3 Years	729.3
3-5 Years	$ 1,420.1