Equity-Based Compensation - FV Assumptions, Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Feb. 28, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employees [Member]
Weighted average assumptions utilized for purposes of valuing grants of options to employees and non-employee directors
Risk free interest rate (as a percent)		1.55%	1.56%	0.95%
Expected volatility (as a percent)		47.00%	47.00%	59.00%
Expected option term		5 years	5 years	5 years
Non Employee Director [Member]
Weighted average assumptions utilized for purposes of valuing grants of options to employees and non-employee directors
Risk free interest rate (as a percent)		1.24%	1.28%	0.85%
Expected volatility (as a percent)		46.00%	46.00%	46.00%
Expected option term		4 years	4 years	4 years
Employee and Non Employee Stock Option
Options
Outstanding at beginning of period (in shares)		2,996,383
Granted (in shares)		1,215,675
Exercised (in shares)		(836,450)
Expired and/or forfeited (in shares)		(471,431)
Outstanding at end of period (in shares)		2,904,177	2,996,383
Outstanding at end of year - vested and unvested expected to vest (in shares)		2,632,232
Exercisable at end of year (in shares)		948,034
Weighted Average Exercise Price
Outstanding at beginning of year (in dollars per share)		$ 22.60
Granted (in dollars per share)		55.72
Exercised (in dollars per share)		21.58
Expired and/or forfeited (in dollars per share)		33.66
Outstanding at end of year (in dollars per share)		34.97	$ 22.60
Outstanding at end of year - vested and unvested expected to vest (in dollars per share)		34.40
Exercisable at end of year (in dollars per share)		$ 23.44
Outstanding at end of year		7 years 9 months 18 days
Outstanding at end of year - vested and unvested expected to vest		7 years 9 months 18 days
Exercisable at end of year		6 years 1 month 6 days
Aggregate Intrinsic Value
Outstanding at end of year		$ 17,114.0
Outstanding at end of year - vested and unvested expected to vest		16,039.0
Exercisable at end of year		$ 9,402.0
Additional Disclosures
Weighted average grant date fair value (in dollars per share)		$ 23.57	$ 10.63	$ 8.60
Options vested (in shares)			846,011
Aggregate intrinsic value of options exercised (in dollars)		$ 31.2	$ 5.9	$ 1.0
Employee and Non Employee Restricted Stock Units | Senior Management [Member]
Options
Granted (in shares)	82,500