Income Taxes - Summary of Effective Tax Rate (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Provision computed at U.S. federal statutory rate		$ 232.8	$ 132.9	$ 192.6
State and local taxes, net of federal benefit		42.6	28.4	35.7
Goodwill impairment	[1]	0.0	11.6	0.0
Other		(7.8)	(1.2)	(7.7)
Total provision for taxes		$ 267.6	$ 171.7	$ 220.6

[1] For additional information regarding the impairment of goodwill within our Paper reporting unit, see Note 9, Goodwill and Intangible Assets.