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Debt and Credit Agreements Annual Maturities (Details)
$ in Millions
Dec. 31, 2015
USD ($)
Debt Disclosure [Abstract]  
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months $ 1.9
Long-term Debt, Maturities, Repayments of Principal in Year Two 323.3
Long-term Debt, Maturities, Repayments of Principal in Year Three 1.8
Long-term Debt, Maturities, Repayments of Principal in Year Four 1.8
Long-term Debt, Maturities, Repayments of Principal in Year Five 0.9
Long-term Debt, Maturities, Repayments of Principal after Year Five $ 1,282.5