Unaudited Quarterly Results (Tables)

12 Months Ended

Dec. 31, 2021

Quarterly Financial Information Disclosure [Abstract]

Unaudited Quarterly Income Statement

	Quarter Ended								Year Ended Dec. 31
2021	Mar. 31		Jun. 30		Sep. 30		Dec. 31
Revenues	$	907.0	$	974.9	$	1,073.8	$	1,053.8	$	4,009.5
Gross profit	243.7		276.3		308.7		313.7		1,142.4
Income from continuing operations	42.8		57.3		66.3		65.4		231.8
Income from discontinued operations, net of income taxes	5.9		6.9		145.7		19.6		178.1
Net income	$	48.7	$	64.2	$	212.0	$	85.0	$	409.9
Per share income from continuing operations:
Basic —
Continuing operations	$	0.81	$	1.08	$	1.26	$	1.26	$	4.40
Discontinued operations	0.11		0.13		2.76		0.38		3.38
	$	0.92	$	1.21	$	4.02	$	1.64	$	7.78
Diluted —
Continuing operations	$	0.80	$	1.06	$	1.24	$	1.24	$	4.33
Discontinued operations	0.11		0.13		2.73		0.38		3.33
	$	0.91	$	1.19	$	3.97	$	1.62	$	7.66
Shares and share equivalents used to calculate earnings per share:
Basic	53.0		53.2		52.7		52.0		52.7
Diluted	53.7		53.9		53.4		52.9		53.5

	Quarter Ended								Year Ended Dec. 31
2020	Mar. 31		Jun. 30		Sep. 30		Dec. 31
Revenues	$	865.4	$	831.9	$	904.4	$	900.4	$	3,502.1
Gross profit	242.6		227.5		236.3		240.8		947.2
Income from continuing operations	39.1		43.5		46.7		48.3		177.6
Income from discontinued operations, net of income taxes	4.7		5.3		5.6		7.1		22.7
Net income	$	43.8	$	48.8	$	52.3	$	55.4	$	200.3
Per share income from continuing operations:
Basic —
Continuing operations	$	0.74	$	0.83	$	0.89	$	0.91	$	3.37
Discontinued operations	0.09		0.10		0.11		0.14		0.43
	$	0.83	$	0.93	$	1.00	$	1.05	$	3.80
Diluted —
Continuing operations	$	0.73	$	0.82	$	0.88	$	0.90	$	3.33
Discontinued operations	0.09		0.10		0.11		0.14		0.43
	$	0.82	$	0.92	$	0.99	$	1.04	$	3.76
Shares and share equivalents used to calculate earnings per share:
Basic	52.8		52.5		52.5		52.8		52.7
Diluted	53.3		53.0		53.0		53.5		53.3