Annual report pursuant to Section 13 and 15(d)

Debt - Schedule of Maturities of Long-term Debt (Details)

v2.4.1.9
Debt - Schedule of Maturities of Long-term Debt (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Long-term Debt and Capital Leases, Fiscal Year Maturity [Roll Forward]    
2015 $ 9.6strza_LongTermDebtAndCapitalLeasesMaturitiesRepaymentsOfPrincipalAndFutureMinimumPaymentsDueInNextTwelveMonths  
2016 441.6strza_LongTermDebtAndCapitalLeasesMaturitiesRepaymentsOfPrincipalAndFutureMinimumPaymentsDueInYearTwo  
2017 9.6strza_LongTermDebtAndCapitalLeasesMaturitiesRepaymentsOfPrincipalAndFutureMinimumPaymentsDueInYearThree  
2018 9.2strza_LongTermDebtAndCapitalLeasesMaturitiesRepaymentsOfPrincipalAndFutureMinimumPaymentsDueInYearFour  
2019 684.5strza_LongTermDebtAndCapitalLeasesMaturitiesRepaymentsOfPrincipalAndFutureMinimumPaymentsDueInYearFive  
Thereafter 80.1strza_LongTermDebtAndCapitalLeasesMaturitiesRepaymentsOfPrincipalAndFutureMinimumPaymentsDueAfterYearFive  
Total minimum payments 1,234.6strza_LongTermDebtAndCapitalLeasesMaturitiesRepaymentsOfPrincipalAndFutureMinimumPaymentsDue  
Total minimum payments (55.1)us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments  
Debt 1,179.5us-gaap_DebtAndCapitalLeaseObligations 1,059.4us-gaap_DebtAndCapitalLeaseObligations
Less: current portion of debt obligations (5.3)us-gaap_DebtCurrent (4.9)us-gaap_DebtCurrent
Debt $ 1,174.2us-gaap_LongTermDebtAndCapitalLeaseObligations $ 1,054.5us-gaap_LongTermDebtAndCapitalLeaseObligations