Supplemental Financial Data - Other Accrued and Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure Text Block Supplement [Abstract]
Accrued operating costs	$ 110.4	$ 75.7
Accrued interest expense	12.6	29.0
Short-term lease liability	26.0	23.4
Accrued income tax	16.4	3.9
Other accrued liabilities	32.9	23.0
Total	$ 198.3	$ 155.0	[1]

[1] See discussion in Note 1 - Basis of Presentation and Description of Business for further detail regarding the elimination of the International lag reporting.