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Subsequent Events - Refinancing Transactions (Details) - USD ($) $ in Millions				3 Months Ended
	Feb. 03, 2017	Jan. 19, 2017	Oct. 30, 2013	Mar. 31, 2017	Jan. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Aug. 31, 2015	Jul. 31, 2015
Term Loan A Facility
Subsequent events
Maximum borrowing capacity			$ 500.0					$ 146.7	$ 500.0
Term of debt			5 years
Term Loan B Facility
Subsequent events
Maximum borrowing capacity			$ 250.0
Term of debt			7 years
Revolving credit facility
Subsequent events
Maximum borrowing capacity			$ 500.0					$ 633.2	$ 500.0
Term of debt			5 years
Senior Unsecured 5.875% Notes due November 1, 2021
Subsequent events
Principal amount						$ 300.0	$ 300.0
Interest rate (as a percent)			5.875%			5.875%	5.875%
Percentage of principal amount at which the entity may redeem notes from net proceeds raised in connection with an equity offering			105.875%
Percentage of the aggregate principal amount of the notes originally issued which must remain outstanding at redemption under terms of the notes			60.00%
Period from completion of equity offering, during which notes can be redeemed			180 days
Subsequent Event
Subsequent events
Amount of common stock authorized to repurchase	$ 100.0
Period of stock repurchase period	2 years
Subsequent Event | Senior Unsecured Notes 5.625 Percent Due January 15, 2027
Subsequent events
Principal amount		$ 400.0			$ 400.0
Interest rate (as a percent)		5.625%			5.625%
Percentage of principal amount at which the entity may redeem notes from net proceeds raised in connection with an equity offering		105.625%
Percentage of the aggregate principal amount of the notes originally issued which must remain outstanding at redemption under terms of the notes		60.00%
Period from completion of equity offering, during which notes can be redeemed		180 days
Subsequent Event | New Senior Secured Credit Facility
Subsequent events
Maximum borrowing capacity		$ 1,500.0
Subsequent Event | Term Loan A Facility
Subsequent events
Maximum borrowing capacity		$ 300.0
Term of debt		5 years
Subsequent Event | Term Loan B Facility
Subsequent events
Maximum borrowing capacity		$ 500.0
Term of debt		7 years
Subsequent Event | Revolving credit facility
Subsequent events
Maximum borrowing capacity		$ 700.0
Term of debt		5 years
Subsequent Event | Senior Unsecured 5.875% Notes due November 1, 2021
Subsequent events
Interest rate (as a percent)		5.875%
Debt extinguishment and financing charges				$ 25.2
Gain (loss) on the early extinguishment of debt				$ 13.2

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