Stockholders' Deficit (Details 4) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended			24 Months Ended
	Jan. 31, 2014 shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($)	Dec. 31, 2015 $ / shares shares
Options Outstanding
Number Outstanding (in shares) | shares		11,052,279			11,052,279
Options Exercisable
Number Exercisable (in shares) | shares		8,239,929			8,239,929
Other than options, disclosures
Outstanding (in shares) | shares		834,433	1,001,523		834,433
Stock compensation expense | $		$ 69.9	$ 62.2	$ 38.4
Stock Options
Other than options, disclosures
Assumed annualized forfeiture rate (as a percent)		5.00%
Performance Stock Units (PSUs)
Other than options, disclosures
Granted (in shares) | shares			55,326
Assumed annualized forfeiture rate (as a percent)		5.00%
Stock compensation expense | $		$ 0.0
Performance Stock Units (PSUs) | Maximum
Other than options, disclosures
Multiplier conversion rate of units into common stock (as a percent)		125.00%
Restricted Stock Units (RSUs)
Other than options, disclosures
Granted (in shares) | shares		206,614
Assumed annualized forfeiture rate (as a percent)		5.00%
Weighted-average fair value assumptions
Cliff vesting period		3 years
Range of Exercise Prices $2.80 - $13.34
Stock options outstanding
Exercise price, lower range limit (in dollars per share)		$ 2.80
Exercise price, upper range limit (in dollars per share)		$ 13.34
Options Outstanding
Number Outstanding (in shares) | shares		1,180,265			1,180,265
Weighted Average Remaining Contractual Life		1 year 3 months 22 days
Weighted Average Exercise Price (in dollars per share)		$ 8.32			$ 8.32
Options Exercisable
Number Exercisable (in shares) | shares		1,180,265			1,180,265
Weighted Average Exercise Price (in dollars per share)		$ 8.32			$ 8.32
Range of Exercise Prices $13.50 - $17.47
Stock options outstanding
Exercise price, lower range limit (in dollars per share)		13.50
Exercise price, upper range limit (in dollars per share)		$ 17.47
Options Outstanding
Number Outstanding (in shares) | shares		1,111,868			1,111,868
Weighted Average Remaining Contractual Life		2 years 1 month 17 days
Weighted Average Exercise Price (in dollars per share)		$ 14.81			$ 14.81
Options Exercisable
Number Exercisable (in shares) | shares		1,111,868			1,111,868
Weighted Average Exercise Price (in dollars per share)		$ 14.81			$ 14.81
Range of Exercise Prices $17.50 - $17.50
Stock options outstanding
Exercise price, lower range limit (in dollars per share)		17.50
Exercise price, upper range limit (in dollars per share)		$ 17.50
Options Outstanding
Number Outstanding (in shares) | shares		71,811			71,811
Weighted Average Remaining Contractual Life		3 years 10 months 10 days
Weighted Average Exercise Price (in dollars per share)		$ 17.50			$ 17.50
Options Exercisable
Number Exercisable (in shares) | shares		71,811			71,811
Weighted Average Exercise Price (in dollars per share)		$ 17.50			$ 17.50
Range of Exercise Prices $17.79 - $17.79
Stock options outstanding
Exercise price, lower range limit (in dollars per share)		17.79
Exercise price, upper range limit (in dollars per share)		$ 17.79
Options Outstanding
Number Outstanding (in shares) | shares		1,501,624			1,501,624
Weighted Average Remaining Contractual Life		3 years 4 days
Weighted Average Exercise Price (in dollars per share)		$ 17.79			$ 17.79
Options Exercisable
Number Exercisable (in shares) | shares		1,501,624			1,501,624
Weighted Average Exercise Price (in dollars per share)		$ 17.79			$ 17.79
Range of Exercise Prices $17.89 - $17.89
Stock options outstanding
Exercise price, lower range limit (in dollars per share)		17.89
Exercise price, upper range limit (in dollars per share)		$ 17.89
Options Outstanding
Number Outstanding (in shares) | shares		164,302			164,302
Weighted Average Remaining Contractual Life		3 years 5 months 23 days
Weighted Average Exercise Price (in dollars per share)		$ 18.09			$ 18.09
Options Exercisable
Number Exercisable (in shares) | shares		161,939			161,939
Weighted Average Exercise Price (in dollars per share)		$ 18.10			$ 18.10
Range of Exercise Prices $18.32 - $18.32
Stock options outstanding
Exercise price, lower range limit (in dollars per share)		18.32
Exercise price, upper range limit (in dollars per share)		$ 18.32
Options Outstanding
Number Outstanding (in shares) | shares		2,572,415			2,572,415
Weighted Average Remaining Contractual Life		4 years 18 days
Weighted Average Exercise Price (in dollars per share)		$ 18.32			$ 18.32
Options Exercisable
Number Exercisable (in shares) | shares		2,378,291			2,378,291
Weighted Average Exercise Price (in dollars per share)		$ 18.32			$ 18.32
Range of Exercise Prices $18.97 - $40.85
Stock options outstanding
Exercise price, lower range limit (in dollars per share)		18.97
Exercise price, upper range limit (in dollars per share)		$ 40.85
Options Outstanding
Number Outstanding (in shares) | shares		1,126,574			1,126,574
Weighted Average Remaining Contractual Life		4 years 3 months 26 days
Weighted Average Exercise Price (in dollars per share)		$ 27.91			$ 27.91
Options Exercisable
Number Exercisable (in shares) | shares		925,169			925,169
Weighted Average Exercise Price (in dollars per share)		$ 26.41			$ 26.41
Range of Exercise Prices $47.24 - $64.55
Stock options outstanding
Exercise price, lower range limit (in dollars per share)		47.24
Exercise price, upper range limit (in dollars per share)		$ 64.55
Options Outstanding
Number Outstanding (in shares) | shares		1,441,393			1,441,393
Weighted Average Remaining Contractual Life		5 years 2 months 12 days
Weighted Average Exercise Price (in dollars per share)		$ 59.92			$ 59.92
Options Exercisable
Number Exercisable (in shares) | shares		866,339			866,339
Weighted Average Exercise Price (in dollars per share)		$ 60.18			$ 60.18
Range of Exercise Prices $67.06 - $67.97
Stock options outstanding
Exercise price, lower range limit (in dollars per share)		67.06
Exercise price, upper range limit (in dollars per share)		$ 67.97
Options Outstanding
Number Outstanding (in shares) | shares		67,589			67,589
Weighted Average Remaining Contractual Life		5 years 9 months 29 days
Weighted Average Exercise Price (in dollars per share)		$ 67.22			$ 67.22
Options Exercisable
Number Exercisable (in shares) | shares		25,778			25,778
Weighted Average Exercise Price (in dollars per share)		$ 67.21			$ 67.21
Range of Exercise Prices $73.21 - $128.21
Stock options outstanding
Exercise price, lower range limit (in dollars per share)		73.21
Exercise price, upper range limit (in dollars per share)		$ 128.21
Options Outstanding
Number Outstanding (in shares) | shares		1,814,438			1,814,438
Weighted Average Remaining Contractual Life		6 years 9 months 26 days
Weighted Average Exercise Price (in dollars per share)		$ 79.39			$ 79.39
Options Exercisable
Number Exercisable (in shares) | shares		16,845			16,845
Weighted Average Exercise Price (in dollars per share)		$ 76.10			$ 76.10
President And Chief Executive Officer | Restricted Stock Units (RSUs)
Other than options, disclosures
Granted (in shares) | shares	400,000
Vested (in shares) | shares					133,333
Outstanding (in shares) | shares		266,667			266,667
Number of units vesting at the end of each of the calendar years 2014 through 2019	0.1667