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Derivative Financial Instruments - Effect on Statement of Comprehensive Income and Statement of Income (Details) - Designated as Hedging Instrument - Derivatives in Net Investment Hedging Relationship $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Derivative [Line Items] |  |
Gain (Loss) Recognized in Other Comprehensive Income | $ 1.0 |
Interest Expense |  |
Derivative [Line Items] |  |
Gain (Loss) Recognized in Earnings from Excluded Components | 3.8 | [1]
Forward contracts |  |
Derivative [Line Items] |  |
Gain (Loss) Recognized in Other Comprehensive Income | 27.2 |
Forward contracts | Interest Expense |  |
Derivative [Line Items] |  |
Gain (Loss) Recognized in Earnings from Excluded Components | 3.8 | [1]
Put options |  |
Derivative [Line Items] |  |
Gain (Loss) Recognized in Other Comprehensive Income | (17.8) |
Put options | Interest Expense |  |
Derivative [Line Items] |  |
Gain (Loss) Recognized in Earnings from Excluded Components | 0.0 | [1]
Call options |  |
Derivative [Line Items] |  |
Gain (Loss) Recognized in Other Comprehensive Income | (8.4) |
Call options | Interest Expense |  |
Derivative [Line Items] |  |
Gain (Loss) Recognized in Earnings from Excluded Components | $ 0.0 | [1]
[1] | The excluded components are recorded as a reduction in Interest expense.

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- Definition Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), Net of Tax + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount, after tax, of reclassification from accumulated other comprehensive income (AOCI) of gain (loss) from increase (decrease) in fair value of net investment hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CCC -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998896-113959 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 + Details
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- Details
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