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Debt (Senior Notes Redemption) (Narrative) (Details) - Senior Notes - 2020 Senior Notes (7.875% coupon)
$ in Millions
Jul. 15, 2015
USD ($)
Debt Instrument [Line Items]  
Debt instrument, redemption price, percentage 103.938%
Extinguishment of debt amount $ 1,080.0
Interest paid 39.4
Write-off of deferred debt issuance cost 11.1
Write-off of unamortized premium 9.7
Redemption Premium  
Debt Instrument [Line Items]  
Loss on extinguishment of debt $ 39.4