CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues	$ 1,130.9	$ 1,141.8	$ 2,259.7	$ 2,232.8
Cost of services	804.6	797.8	1,607.0	1,562.2
Gross profit	326.3	344.0	652.7	670.6
Selling, general and administrative expenses	210.5	220.4	434.6	432.5
Amortization of intangible assets	17.9	13.5	36.0	27.4
Operating income	97.9	110.1	182.1	210.7
Interest expense	(15.8)	(10.1)	(31.2)	(19.4)
Income before Income Taxes	82.1	100.0	150.9	191.3
Provision for income taxes	22.0	27.4	41.3	51.1
Income from continuing operations	60.1	72.6	109.6	140.2
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	0.0	(0.1)	0.0	(0.9)
Net income	$ 60.1	$ 72.5	$ 109.6	$ 139.3
Basic —
Earnings Per Share Basic Continuing Operation	$ 1.23	$ 1.42	$ 2.23	$ 2.73
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0	0	(0.01)
Basic earnings per share:	1.23	1.42	2.23	2.72
Diluted —
Earnings Per Share Diluted Continuing Operation	1.22	1.41	2.21	2.70
Earnings Per Share Diluted Discontinued Operations	0	0	0	(0.01)
Diluted earnings per share:	$ 1.22	$ 1.41	$ 2.21	$ 2.69
Number of shares and share equivalents used to calculate earnings per share:
Weighted-average number of common shares outstanding — basic	49.0	51.0	49.1	51.3
Diluted	49.2	51.6	49.5	52.0
Reconciliation of net income to comprehensive income:
Net income	$ 60.1	$ 72.5	$ 109.6	$ 139.3
Foreign currency translation adjustment	1.4	(1.7)	2.4	(1.7)
Comprehensive income	$ 61.5	$ 70.8	$ 112.0	$ 137.6