Stock Repurchase Plans	6 Months Ended
Jun. 30, 2017
Class of Stock Disclosures [Abstract]
Stock Repurchase Plans	Stock Repurchase Plans On November 20, 2013, Holdings announced that its Board of Directors approved a new stock repurchase program that permitted Holdings to repurchase up to $500.0 million in shares of Holdings' common stock over a four-year period (the "November 2013 Stock Repurchase Plan"). Holdings fully utilized the availability under the November 2013 Stock Repurchase Plan by August 2016. Throughout the program, Holdings repurchased 11,428,000 shares at a cumulative cost of approximately $500.0 million and an average price per share of $43.75. On June 7, 2016, Holdings announced that its Board of Directors approved a new stock repurchase program that permits Holdings to repurchase an incremental $500.0 million in shares of Holdings' common stock (the "June 2016 Stock Repurchase Plan"). Holdings fully utilized the availability under the June 2016 Stock Repurchase Plan by April 2017. Throughout the program, Holdings repurchased 8,392,000 shares at a cumulative cost of approximately $500.0 million and an average price per share of $59.58. On March 30, 2017, Holdings announced that its Board of Directors approved a new stock repurchase plan that permits Holdings to repurchase an incremental $500.0 million in shares of Holdings' common stock (the "March 2017 Stock Repurchase Plan"). As of July 21, 2017, Holdings had repurchased 606,000 shares at a cumulative cost of approximately $37.2 million and an average price per share of $61.36 under the March 2017 Stock Repurchase Plan, leaving approximately $462.8 million available for permitted repurchases. The timing of share repurchases is limited by the covenants in the Amended and Restated Credit Facility, the 2024 Notes, the 2024 Notes Add-on and the 2027 Notes. We will continue to evaluate the share repurchase limits per the covenants on an on-going basis to determine our ability to utilize the remaining amount authorized for share repurchases. See Note 4 for further discussion.

Stock Repurchase Plans

On November 20, 2013, Holdings announced that its Board of Directors approved a new stock repurchase program that permitted Holdings to repurchase up to $500.0 million in shares of Holdings' common stock over a four-year period (the "November 2013 Stock Repurchase Plan"). Holdings fully utilized the availability under the November 2013 Stock Repurchase Plan by August 2016. Throughout the program, Holdings repurchased 11,428,000 shares at a cumulative cost of approximately $500.0 million and an average price per share of $43.75.

On June 7, 2016, Holdings announced that its Board of Directors approved a new stock repurchase program that permits Holdings to repurchase an incremental $500.0 million in shares of Holdings' common stock (the "June 2016 Stock Repurchase Plan"). Holdings fully utilized the availability under the June 2016 Stock Repurchase Plan by April 2017. Throughout the program, Holdings repurchased 8,392,000 shares at a cumulative cost of approximately $500.0 million and an average price per share of $59.58.

On March 30, 2017, Holdings announced that its Board of Directors approved a new stock repurchase plan that permits Holdings to repurchase an incremental $500.0 million in shares of Holdings' common stock (the "March 2017 Stock Repurchase Plan"). As of July 21, 2017, Holdings had repurchased 606,000 shares at a cumulative cost of approximately $37.2 million and an average price per share of $61.36 under the March 2017 Stock Repurchase Plan, leaving approximately $462.8 million available for permitted repurchases.

The timing of share repurchases is limited by the covenants in the Amended and Restated Credit Facility, the 2024 Notes, the 2024 Notes Add-on and the 2027 Notes. We will continue to evaluate the share repurchase limits per the covenants on an on-going basis to determine our ability to utilize the remaining amount authorized for share repurchases. See Note 4 for further discussion.