Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Comparison Of Basic And Diluted Earnings Per Share

The following table sets forth the comparison of basic and diluted earnings (loss) per share:

	Three Months Ended   September 30,					Nine Months Ended   September 30,
	2016		2015			2016		2015
Basic earnings (loss) per share:
Net income (loss)	$	68.6	$	(51.6	)	$	296.1	$	82.2
Weighted average common shares outstanding	87,102,290		90,882,511			88,691,983		93,068,088
Basic earnings (loss) per share	$	0.79	$	(0.57	)	$	3.34	$	0.88

	Three Months Ended   September 30,					Nine Months Ended   September 30,
	2016		2015			2016		2015
Diluted earnings (loss) per share:
Net income (loss)	$	68.6	$	(51.6	)	$	296.1	$	82.2
Weighted average common shares outstanding	87,102,290		90,882,511			88,691,983		93,068,088
Share equivalents:
Stock options	819,733		—			832,656		1,071,569
RSUs and performance-based equity awards	656,841		—			570,017		569,276
Employee share purchase plan	24,237		—			18,950		16,047
Weighted average common shares and common share equivalents outstanding - diluted	88,603,101		90,882,511			90,113,606		94,724,980
Diluted earnings (loss) per share	$	0.77	$	(0.57	)	$	3.29	$	0.87