Overview, Basis of Presentation and Significant Accounting Policies - Summary of Current Expected Credit Loss Reserve (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Receivables [Abstract]
Balance, beginning of year	[1]	$ 17.1	$ 12.7
Provisions charged to expense		3.6	2.3
Write-offs, reclassifications and other		(2.6)	(0.5)
Balance, end of period	[1]	$ 18.1	$ 14.5

[1] As of March 31, 2023, the CECL reserve balance is comprised of a $17.2 million provision for accounts receivable and a $0.9 million provision for unbilled receivables and contract assets. As of December 31, 2022, the CECL reserve balance was comprised of a $16.5 million provision for accounts receivable and a $0.6 million provision for unbilled receivables and contract assets.