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	Jun. 30, 2018	Dec. 31, 2017
Financial assets and liabilities accounted for at fair value on a recurring basis
Total assets at fair value	$ 10.5	$ 7.4
Total non-current liabilities at fair value	31.9	18.9
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	7.3	4.5
Total non-current assets at fair value	3.2	2.9
Total assets at fair value	10.5	7.4
Total current liabilities at fair value	3.8	1.2
Total non-current liabilities at fair value	28.1	17.7
Total liabilities at fair value	31.9	18.9
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	0.6	1.1
Total current liabilities at fair value	3.6	1.1
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	1.9	1.7
Total non-current assets at fair value	0.2	0.6
Total current liabilities at fair value	0.2	0.1
Total non-current liabilities at fair value	0.3
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	4.8	1.7
Total non-current assets at fair value	3.0	2.3
Total non-current liabilities at fair value	27.8
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	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
Total non-current liabilities at fair value	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	0.0
Total non-current assets at fair value	0.0	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	7.3	4.5
Total non-current assets at fair value	3.2	2.9
Total assets at fair value	10.5	7.4
Total current liabilities at fair value	3.8	1.2
Total non-current liabilities at fair value	28.1	17.7
Total liabilities at fair value	31.9	18.9
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	0.6	1.1
Total current liabilities at fair value	3.6	1.1
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	1.9	1.7
Total non-current assets at fair value	0.2	0.6
Total current liabilities at fair value	0.2	0.1
Total non-current liabilities at fair value	0.3
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	4.8	1.7
Total non-current assets at fair value	3.0	2.3
Total non-current liabilities at fair value	27.8
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	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
Total non-current liabilities at fair value	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	0.0
Total non-current assets at fair value	0.0	$ 0.0
Total non-current liabilities at fair value	$ 0.0