Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

—Quarterly Financial Data (Unaudited)

	2019
(in millions, except per share data)	First		Second		Third		Fourth		Year
Revenues	$	1,071.9	$	1,314.8	$	1,280.6	$	1,144.3	$	4,811.6
Gross margin	288.6		394.2		380.2		308.7		1,371.7
Operating income	114.7		207.2		191.0		141.3		654.2
Income from continuing operations	77.4		153.0		139.3		104.0		473.7
Income (loss) from discontinued operations	2.0		(0.1)		(1.4)		(1.4)		(0.9)
Net income	79.4		152.9		137.9		102.6		472.8
Basic earnings per share:
Income from continuing operations (1)	$	1.34	$	2.68	$	2.45	$	1.84	$	8.30
Income (loss) from discontinued operations (1)	0.03		—		(0.02)		(0.03)		(0.02)
Basic earnings per share (1)	$	1.37	$	2.68	$	2.43	$	1.81	$	8.28
Diluted earnings per share:
Income from continuing operations (1)	$	1.33	$	2.65	$	2.42	$	1.81	$	8.21
Income (loss) from discontinued operations (1)	0.03		—		(0.02)		(0.03)		(0.02)
Diluted earnings per share (1)	$	1.36	$	2.65	$	2.40	$	1.78	$	8.19

⁽¹⁾The sum of quarterly earnings per share amounts may not equal the year due to differences in weighted-average share calculation.

	2018
(in millions, except per share data)	First		Second		Third		Fourth		Year
Revenues	$	984.7	$	1,236.1	$	1,181.4	$	1,077.3	$	4,479.5
Gross margin	249.4		332.2		314.3		278.8		1,174.7
Operating income	94.7		159.7		140.0		114.6		509.0
Income from continuing operations	57.9		114.7		96.9		89.1		358.6
Income (loss) from discontinued operations	251.7		(1.0)		2.8		(1.0)		252.5
Net income	309.6		113.7		99.7		88.1		611.1
Basic earnings per share:
Income from continuing operations (1)	$	0.93	$	1.88	$	1.61	$	1.50	$	5.92
Income (loss) from discontinued operations (1)	4.05		(0.02)		0.05		(0.02)		4.17
Basic earnings per share (1)	$	4.98	$	1.86	$	1.66	$	1.48	$	10.09
Diluted earnings per share:
Income from continuing operations (1)	$	0.92	$	1.87	$	1.59	$	1.49	$	5.88
Income (loss) from discontinued operations (1)	4.02		(0.02)		0.05		(0.02)		4.14
Diluted earnings per share (1)	$	4.94	$	1.85	$	1.64	$	1.47	$	10.02

⁽¹⁾The sum of quarterly earnings per share amounts may not equal the year due to differences in weighted-average share calculation.