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Derivatives, Hedging Programs and Other Financial Instruments, Balance Sheet (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Derivative [Line Items] |  |
Cash and money market funds | $ 29.3 | $ 22.9
Commercial paper | 142.8 | 102.7
Short-term investments | $ 25.3 | 36.7
Document Period End Date | Sep. 30, 2019 |
Fair Value, Measurements, Recurring |  |
Derivative [Line Items] |  |
Cash and cash equivalents | $ 172.1 | 125.6
Derivative asset | 2.2 | 4.3
Derivative liability | (15.9) | (15.9)
Fair Value, Measurements, Recurring | Other Current Liabilities |  |
Derivative [Line Items] |  |
Derivative liability | (12.8) | (13.2)
Fair Value, Measurements, Recurring | Other Noncurrent Liabilities |  |
Derivative [Line Items] |  |
Derivative liability | (3.1) | (2.7)
Fair Value, Measurements, Recurring | Other Current Assets |  |
Derivative [Line Items] |  |
Derivative asset | 1.2 | 3.4
Fair Value, Measurements, Recurring | Other Assets |  |
Derivative [Line Items] |  |
Derivative asset | 1.0 | 0.9
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring |  |
Derivative [Line Items] |  |
Cash and money market funds | 29.3 | 22.9
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |  |
Derivative [Line Items] |  |
Derivative asset | 2.2 | 4.3
Derivative liability | (15.9) | (15.9)
Debt Securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |  |
Derivative [Line Items] |  |
Commercial paper | 142.8 | 102.7
Short-term investments | $ 25.3 | $ 36.7

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