Income Taxes - Schedule of income before income tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income before income taxes, United States	$ 2,442.3	$ 2,011.2	$ 2,151.7
Income before income taxes, Foreign	1,368.1	417.9	401.8
Income before income taxes	$ 3,810.4	$ 2,429.1	$ 2,553.5