Overview, Basis of Presentation and Significant Accounting Policies - Summary of Current Expected Credit Loss Reserve (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	[1]	$ 12.7	$ 10.5
Provisions charged to expense		4.2	2.1
Write-offs, reclassifications and other		(1.0)	0.8
Balance, end of period	[1]	$ 15.9	$ 13.4

[1] As of June 30, 2022, the CECL reserve balance was comprised of a $14.7 million provision for accounts receivable and a $1.2 million provision for unbilled receivables and contract assets. As of December 31, 2021, the CECL reserve balance was comprised of a $12.0 million provision for accounts receivable and a $0.7 million provision for unbilled receivables and contract assets.