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Financial Instruments - Balance Sheet (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Derivatives, Fair Value [Line Items] |  |
Gain (loss) expected to be reclassified in one year or less | $ 4.4 |
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from cash flow hedges, before tax | 27.1 | $ 35.0
Foreign currency |  |
Derivatives, Fair Value [Line Items] |  |
Gain (loss) expected to be reclassified in one year or less | 4.2 |
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from cash flow hedges, before tax | 4.2 | 5.6
Foreign currency | Prepayments and other current assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 6.2 | 7.2
Foreign currency | Accounts payable and accrued expenses |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | 2.3 | 1.1
Commodity contracts |  |
Derivatives, Fair Value [Line Items] |  |
Gain (loss) expected to be reclassified in one year or less | 0.2 |
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from cash flow hedges, before tax | 0.2 | (0.1)
Commodity contracts | Prepayments and other current assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 0.2 | 0.1
Commodity contracts | Accounts payable and accrued expenses |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | 0.0 | 0.0
Net investment hedge |  |
Derivatives, Fair Value [Line Items] |  |
Gain (loss) expected to be reclassified in one year or less | 0.0 |
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from cash flow hedges, before tax | $ 22.7 | $ 29.5

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