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Derivatives, Hedging Programs and Other Financial Instruments, Balance Sheet (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Derivative [Line Items] |  |
Cash and money market funds | $ 199.6 | $ 28.2
Commercial paper | 107.6 | 236.1
Short-term investments | 39.3 | 78.7
Fair Value, Measurements, Recurring |  |
Derivative [Line Items] |  |
Cash and cash equivalents | 307.2 | 264.3
Derivative asset | 1.8 | 4.0
Derivative liability | (30.8) | (11.2)
Fair Value, Measurements, Recurring | Other Current Liabilities |  |
Derivative [Line Items] |  |
Derivative liability | (19.0) | (7.6)
Fair Value, Measurements, Recurring | Other Noncurrent Liabilities |  |
Derivative [Line Items] |  |
Derivative liability | (11.8) | (3.6)
Fair Value, Measurements, Recurring | Other Current Assets |  |
Derivative [Line Items] |  |
Derivative asset | 0.6 | 2.1
Fair Value, Measurements, Recurring | Other Assets |  |
Derivative [Line Items] |  |
Derivative asset | 1.2 | 1.9
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring |  |
Derivative [Line Items] |  |
Cash and money market funds | 199.6 | 28.2
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |  |
Derivative [Line Items] |  |
Derivative asset | 1.8 | 4.0
Derivative liability | (30.8) | (11.2)
Derivative Assets (Liabilities), at Fair Value, Net | (29.0) | (7.2)
Debt Securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |  |
Derivative [Line Items] |  |
Commercial paper | 107.6 | 236.1
Designated as Hedging Instrument | Purchase |  |
Derivative [Line Items] |  |
Derivative liability | $ (29.2) | $ (7.2)

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