Fair Value of Financial Instruments - Financial Assets and Liabilities Accounted for at Fair Value on a Recurring Basis by Level within the Fair Value Hierarchy (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financial assets and liabilities accounted for at fair value on a recurring basis
Total assets at fair value	$ 7.4	$ 1.7
Total non-current liabilities at fair value	18.9	1.1
Fair Value Measurement on Recurring Basis
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	4.5	1.5
Total non-current assets at fair value	2.9	0.2
Total assets at fair value	7.4	1.7
Total current liabilities at fair value	1.2	1.1
Total non-current liabilities at fair value	17.7
Total liabilities at fair value	18.9	1.1
Fair Value Measurement on Recurring Basis | Foreign currency exchange contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	1.1	0.6
Total current liabilities at fair value	1.1	1.0
Fair Value Measurement on Recurring Basis | Commodity contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	1.7	0.9
Total non-current assets at fair value	0.6	0.2
Total current liabilities at fair value	0.1	0.1
Fair Value Measurement on Recurring Basis | Interest rate swap contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	1.7
Total non-current assets at fair value	2.3
Total non-current liabilities at fair value	17.7
Fair Value Measurement on Recurring Basis | Level 1
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	0.0	0.0
Total non-current assets at fair value	0.0	0.0
Total assets at fair value	0.0	0.0
Total current liabilities at fair value	0.0	0.0
Total non-current liabilities at fair value	0.0
Total liabilities at fair value	0.0	0.0
Fair Value Measurement on Recurring Basis | Level 1 | Foreign currency exchange contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	0.0	0.0
Total current liabilities at fair value	0.0	0.0
Fair Value Measurement on Recurring Basis | Level 1 | Commodity contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	0.0	0.0
Total non-current assets at fair value	0.0	0.0
Total current liabilities at fair value	0.0	0.0
Fair Value Measurement on Recurring Basis | Level 1 | Interest rate swap contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	0.0
Total non-current assets at fair value	0.0
Total non-current liabilities at fair value	0.0
Fair Value Measurement on Recurring Basis | Level 2
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	4.5	1.5
Total non-current assets at fair value	2.9	0.2
Total assets at fair value	7.4	1.7
Total current liabilities at fair value	1.2	1.1
Total non-current liabilities at fair value	17.7
Total liabilities at fair value	18.9	1.1
Fair Value Measurement on Recurring Basis | Level 2 | Foreign currency exchange contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	1.1	0.6
Total current liabilities at fair value	1.1	1.0
Fair Value Measurement on Recurring Basis | Level 2 | Commodity contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	1.7	0.9
Total non-current assets at fair value	0.6	0.2
Total current liabilities at fair value	0.1	0.1
Fair Value Measurement on Recurring Basis | Level 2 | Interest rate swap contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	1.7
Total non-current assets at fair value	2.3
Total non-current liabilities at fair value	17.7
Fair Value Measurement on Recurring Basis | Level 3
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	0.0	0.0
Total non-current assets at fair value	0.0	0.0
Total assets at fair value	0.0	0.0
Total current liabilities at fair value	0.0	0.0
Total non-current liabilities at fair value	0.0
Total liabilities at fair value	0.0	0.0
Fair Value Measurement on Recurring Basis | Level 3 | Foreign currency exchange contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	0.0	0.0
Total current liabilities at fair value	0.0	0.0
Fair Value Measurement on Recurring Basis | Level 3 | Commodity contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	0.0	0.0
Total non-current assets at fair value	0.0	0.0
Total current liabilities at fair value	0.0	$ 0.0
Fair Value Measurement on Recurring Basis | Level 3 | Interest rate swap contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets at fair value	0.0
Total non-current assets at fair value	0.0
Total non-current liabilities at fair value	$ 0.0