Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Results of Operations

(in millions, except per common share data)	For the Year Ended December 31, 2017
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter(a)
Net revenues	$	167.5	$	339.3	$	196.9	$	178.9
Operating income (loss)	8.4		123.3		26.8		(12.8		)
Income from continuing operations, net of tax	2.2		72.9		12.9		34.4
Income from discontinued operations, net of tax	5.1		5.4		3.8		3.8
Net income per common share - basic (c):
Continuing operations	$	0.13	$	4.52	$	0.85	$	2.25
Discontinued operations	0.31		0.34		0.24		0.25
Net income per common share - basic	$	0.44	$	4.86	$	1.09	$	2.50
Net income per common share - diluted (c):
Continuing operations	$	0.13	$	4.47	$	0.84	$	2.22
Discontinued operations	0.31		0.34		0.24		0.24
Net income per common share - diluted	$	0.44	$	4.81	$	1.08	$	2.46

(in millions, except per common share data)	For the Year Ended December 31, 2016
	First Quarter			Second Quarter		Third Quarter		Fourth Quarter(b)
Net revenues	$	166.3		$	313.3	$	181.0	$	161.8
Operating income	12.5			113.6		14.0		32.4
Income from continuing operations, net of tax	7.1			66.8		3.4		19.4
(Loss) income from discontinued operations, net of tax	(4.3		)	3.0		5.3		7.4
Net income (loss) per common share - basic (c):
Continuing operations	$	0.43		$	3.97	$	0.20	$	1.17
Discontinued operations	(0.26		)	0.19		0.32		0.45
Net income per common share - basic	$	0.17		$	4.16	$	0.52	$	1.62
Net income (loss) per common share - diluted (c):
Continuing operations	$	0.42		$	3.93	$	0.20	$	1.16
Discontinued operations	(0.26		)	0.18		0.32		0.44
Net income per common share - diluted	$	0.16		$	4.11	$	0.52	$	1.60