Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Selected Quarterly Financial Information [Abstract]

Quarterly Financial Information [Table Text Block]

	2016
	First			Second		Third		Fourth
(in millions, except per common share amounts)	Quarter			Quarter		Quarter		Quarter			Total
Revenue	$	288.9		$	299.2	$	312.4	$	285.3		$	1,185.8
Operating income	29.6			27.4		25.5		10.5			93.0
Income (loss) from continuing operations	7.0			77.6		18.8		(1.6		)	101.8
Income from discontinued operations, net of tax	—			—		—		0.3			0.3
Net income (loss)	7.0			77.6		18.8		(1.3		)	102.1
Basic earnings (loss) per common share from continuing operations	$	0.10		$	1.79	$	0.39	$	(0.10	)	$	2.17
Basic earnings per common share from discontinued operations	$	—		$	—	$	—	$	0.01		$	0.01
Net basic earnings (loss) per common share	$	0.10		$	1.79	$	0.39	$	(0.09	)	$	2.18
Diluted earnings (loss) per common share from continuing operations	$	0.10		$	1.78	$	0.38	$	(0.10	)	$	2.17
Diluted earnings per common share from discontinued operations	$	—		$	—	$	—	$	0.01		$	0.01
Net diluted earnings (loss) per common share	$	0.10		$	1.78	$	0.38	$	(0.09	)	$	2.18
	2015
	First			Second		Third		Fourth
(in millions, except per common share amounts)	Quarter			Quarter		Quarter		Quarter			Total
Revenue	$	292.9		$	285.8	$	299.8	$	289.3		$	1,167.8
Operating income	37.1			29.7		36.2		25.0			128.0
Income from continuing operations	0.3			180.7		79.3		30.5			290.8
Income from discontinued operations, net of tax	48.9			10.9		1.0		2.1			62.9
Net income	49.2			191.6		80.3		32.6			353.7
Basic earnings (loss) per common share from continuing operations	$	(0.06	)	$	4.25	$	1.83	$	0.66		$	6.69
Basic earnings per common share from discontinued operations	$	1.17		$	0.26	$	0.02	$	0.05		$	1.50
Net basic earnings per common share	$	1.11		$	4.51	$	1.85	$	0.71		$	8.19
Diluted earnings (loss) per common share from continuing operations	$	(0.06	)	$	4.15	$	1.83	$	0.66		$	6.68
Diluted earnings per common share from discontinued operations	$	1.17		$	0.26	$	0.02	$	0.05		$	1.49
Net diluted earnings per common share	$	1.11		$	4.41	$	1.85	$	0.71		$	8.17