Fair Value Measurements Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Fair Value, Assets Measured on Recurring Basis, Derivative Financial Instruments, Assets	$ 3.5	$ 1.1
Fair Value Assets Measured on Recurring Basis Total Assets	3.5	1.1
Fair Value, Liabilities Measured on Recurring Basis, Derivative Financial Instruments, Liabilities	6.7	11.5
Fair Value Liabilities Measured on Recurring Basis Total Liabilities	6.7	11.5
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Fair Value, Assets Measured on Recurring Basis, Derivative Financial Instruments, Assets	4.1	7.2
Fair Value Assets Measured on Recurring Basis Total Assets	4.1	7.2
Fair Value, Liabilities Measured on Recurring Basis, Derivative Financial Instruments, Liabilities	26.6	1.0
Fair Value Liabilities Measured on Recurring Basis Total Liabilities	26.6	1.0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Fair Value, Assets Measured on Recurring Basis, Derivative Financial Instruments, Assets	7.7	7.0
Fair Value Assets Measured on Recurring Basis Total Assets	7.7	7.0
Fair Value, Liabilities Measured on Recurring Basis, Derivative Financial Instruments, Liabilities	5.4	0.0
Fair Value Liabilities Measured on Recurring Basis Total Liabilities	5.4	0.0
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Fair Value, Assets Measured on Recurring Basis, Derivative Financial Instruments, Assets	15.3	15.3
Fair Value Assets Measured on Recurring Basis Total Assets	15.3	15.3
Fair Value, Liabilities Measured on Recurring Basis, Derivative Financial Instruments, Liabilities	38.7	12.5
Fair Value Liabilities Measured on Recurring Basis Total Liabilities	$ 38.7	$ 12.5