CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Revenues	$ 1,020.6	$ 1,034.7	$ 1,988.9	$ 2,083.7
Costs of services	727.3	733.6	1,420.2	1,486.4
Gross profit	293.3	301.1	568.7	597.3
Selling, general, and administrative expenses	216.8	205.6	431.3	415.8
Amortization of intangible assets	16.9	15.1	31.2	30.2
Operating income	59.6	80.4	106.2	151.3
Interest expense, net	(18.2)	(15.8)	(33.6)	(33.4)
Income before income taxes	41.4	64.6	72.6	117.9
Provision for income taxes	12.1	17.4	22.4	32.6
Net income	$ 29.3	$ 47.2	$ 50.2	$ 85.3
Basic
Basis (in dollars per share)	$ 0.67	$ 1.03	$ 1.15	$ 1.85
Diluted
Diluted (in dollars per share)	$ 0.67	$ 1.02	$ 1.14	$ 1.83
Shares and share equivalents used to calculate earnings per share:
Basic (in shares)	43.8	45.7	43.8	46.1
Diluted (in shares)	44.0	46.1	44.0	46.5
Reconciliation of net income to comprehensive income:
Net income	$ 29.3	$ 47.2	$ 50.2	$ 85.3
Foreign currency translation adjustment	2.6	2.1	3.4	2.3
Comprehensive income	$ 31.9	$ 49.3	$ 53.6	$ 87.6