Debt - Debt Maturity (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Debt Maturities In 2014 [Member]
Debt maturities within one year of balance sheet date	$ 0
Debt Maturities In 2015 [Member]
Debt maturities due more than one year of balance sheet date	249.9
Debt Maturities In 2016 [Member]
Debt maturities due more than one year of balance sheet date	0
Debt Maturities In 2017 [Member]
Debt maturities due more than one year of balance sheet date	298.8
Debt Maturities In 2018 [Member]
Debt maturities due more than one year of balance sheet date	0
Thereafter [Member]
Debt maturities due more than one year of balance sheet date	649.1
Total [Member]
Total debt maturities	$ 1,197.8