Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues from services	[1]	$ 4,856.1	$ 5,074.1	$ 9,608.4	$ 10,217.4
Cost of services		3,993.8	4,152.9	7,883.0	8,399.1
Gross profit		862.3	921.2	1,725.4	1,818.3
Selling and administrative expenses		754.7	740.5	1,499.9	1,498.9
Operating profit		107.6	180.7	225.5	319.4
Interest and other expenses, net		11.8	6.7	19.3	9.4
Earnings before income taxes		95.8	174.0	206.2	310.0
Provision for income taxes		30.6	51.8	63.2	96.2
Net earnings		$ 65.2	$ 122.2	$ 143.0	$ 213.8
Net earnings (loss) per share - basic		$ 1.3	$ 2.32	$ 2.84	$ 4.02
Net earnings (loss) per share - diluted		$ 1.29	$ 2.29	$ 2.8	$ 3.97
Weighted average shares - basic (in shares)		50.2	52.7	50.4	53.2
Weighted average shares - diluted (in shares)		50.7	53.4	51.0	53.8

[1] Our consolidated revenues from services include fees received from our franchise offices of $3.3 and $3.9 for the three months ended June 30, 2023 and 2022, respectively, and $7.2 and $7.5 for the six months ended June 30, 2023 and 2022, respectively. These fees are primarily based on revenues generated by the franchise offices, which were $250.6 and $275.6 for the three months ended June 30, 2023 and 2022, respectively, and $500.8 and $540.8 for the six months ended June 30, 2023 and 2022, respectively.