Fair Value Measurements - Schedule of Fair Values of Financial Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Liabilities:
Fair Value, Long-term debt, including current portion	$ 1,828.9	$ 1,844.0
Carrying Value, Long-term debt, including current portion	1,836.5	1,863.9
Level 1
Liabilities:
Fair Value, Long-term debt, including current portion	0.0	0.0
Level 2
Liabilities:
Fair Value, Long-term debt, including current portion	1,828.9	1,844.0
Level 3
Liabilities:
Fair Value, Long-term debt, including current portion	$ 0.0	$ 0.0