Supplemental Cash Flow Information - Summary of Cash Paid for Interest and Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash paid for interest and income taxes
Interest	$ 81.0	$ 57.0	$ 57.0
Income taxes	184.0	11.0	8.0
Equity and replacement stock awards issued as consideration in the Merger	9,120.0	0.0	0.0
Cash and cash equivalents	1,036.0	140.0
Restricted cash	10.0	12.0
Total	$ 1,046.0	$ 152.0	$ 214.0	$ 2.0