Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2013

Employee Benefit and Other Plans [Abstract]

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

Performance stock units: The following table summarizes information related to our performance stock units as December 31, 2013:

	Number of Shares		Weighted Average Fair Value
Non-vested shares at January 1, 2013	—		$	—
Granted	442,540		$	22.84
Canceled / Forfeited	(10,682	)	$	25.14
Non-vested shares at December 31, 2013	431,858		$	22.79

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award

The following table summarizes information related to our common stock options under the Stock Option Plans:

	Number of Stock Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in millions)
Options outstanding at January 1, 2013	5,519,345		$	11.78
Granted	1,251,159		$	21.64
Exercised	(880,031	)	$	11.48
Canceled / Forfeited	(381,227	)	$	10.88
Options outstanding at December 31, 2013	5,509,246		$	14.01	5.33	$	66.4
Options exercisable at December 31, 2013	2,636,839		$	12.62	4.69	$	35.6
Expected to vest at December 31, 2013	2,176,609		$	15.55	5.94	$	22.7

Schedule of Weighted-Average Value per Granted Option

The following information is provided for our stock options:

	For the year ended December 31,
	2013		2012		2011
	(in millions, except grant date fair value)
Weighted-average grant date fair value	$	10.63	$	5.06	$	6.65
Intrinsic value of stock options exercised	$	9.2	$	0.5	$	3.0
Net cash proceeds from exercise of stock options	$	10.1	$	1.5	$	3.7

Schedule of Nonvested Share Activity

: The following table summarizes information related to our restricted stock units, as of December 31, 2013 was as follows:

	Number of Shares		Weighted Average Fair Value
Non-vested shares at January 1, 2013	220,537		$	11.33
Granted	714,958		$	20.55
Vested	(243,769	)	$	14.60
Canceled / Forfeited	(62,208	)	$	15.64
Non-vested shares at December 31, 2013	629,518		$	20.11

Schedule of Weighted Average of Assumptions Used

In computing the share-based compensation, the following is a weighted average of the assumptions used:

	Risk- Free Interest Rate		Expected Life at Issuance (in years)	Expected Volatility		Expected Dividends
Options granted in the following periods:
2013	1.2	%	5.11	57.0	%	None
2012	0.8	%	5.25	58.0	%	None
2011	1.8	%	5.14	56.7	%	None

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The total compensation costs recognized were as follows:

	For the year ended December 31,
	2013		2012		2011
	(in millions)
Share-based compensation expense	$	11.5	$	8.5	$	6.5

Schedule of Benefit Obligations

The total obligation under the Executive Plan and the cash surrender value of insurance policies are as follow:

	December 31,
	2013		2012
	(in millions)
Total obligation under Executive Plan (a)	$	6.5	$	6.5
Cash surrender value of insurance policies (b)	$	2.8	$	2.5

(a) Recorded in "Other Long-Term Liabilities" in the Consolidated Balance Sheets.

(b) Recorded in "Other Assets, Net" in the Consolidated Balance Sheets.