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Debt (Senior Notes Redemption) (Narrative) (Details) - Senior Notes - 2020 Senior Notes (7.875% coupon) - USD ($)
$ in Millions
6 Months Ended
Jul. 15, 2015
Jun. 30, 2015
May. 12, 2010
Debt Instrument [Line Items]      
Stated percentage rate [1]     7.875%
Debt instrument, redemption price, percentage   103.938%  
Subsequent Event      
Debt Instrument [Line Items]      
Debt instrument, redemption price, percentage 103.938%    
Extinguishment of debt amount $ 1,040.0    
Subsequent Event | Redemption Premium      
Debt Instrument [Line Items]      
Gains on extinguishment of debt $ 39.4    
[1] Instrument was called by the Company on July 15, 2015 at a redemption price of 103.938% of the principal amount, together with accrued and unpaid interest at the redemption date.