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Derivatives and Hedging Activity (Tables) | 12 Months Ended
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Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Summary of Notional and Fair Values of Derivative Instruments | The notional and fair values of derivative instruments are as follows at December 31, 2017 and 2016 (in millions):
|  | Notional Amount |  |  | Derivatives Assets (1) |  |  | Derivative Liabilities (2) |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Derivatives accounted for as hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | 200.0 |  |  | $ | 200.0 |  |  | $ | 2.2 |  |  | $ | 11.4 |  |  | $ | — |  |  | $ | — |
Foreign exchange contracts (3) |  |  | 18.7 |  |  |  | 4.1 |  |  |  | 8.1 |  |  |  | 2.1 |  |  |  | 2.9 |  |  |  | 17.5 |
Total |  | $ | 218.7 |  |  | $ | 204.1 |  |  | $ | 10.3 |  |  | $ | 13.5 |  |  | $ | 2.9 |  |  | $ | 17.5 |
(1) | Included within other current assets $7.7 million and $12.5 million at December 31, 2017 and 2016, respectively and other non-current assets $2.7 million and $1.0 million at December 31, 2017 and 2016, respectively.
(2) | Included within other current liabilities $1.6 million and $11.8 million at December 31, 2017 and 2016, respectively and other non-current liabilities $1.3 million and $5.7 million at December 31, 2017 and 2016, respectively.
(3) | Included within foreign exchange contracts at December 31, 2017 were $141.0 million of call options offset with $141.0 million of put options and $13.3 million of buy forwards offset with $31.0 million of sell forwards. Included within foreign exchange contracts at December 31, 2016 were $78.3 million of call options offset with $78.3 million of put options and $61.6 million of buy forwards offset with $57.5 million of sell forwards.
Summary of Amounts of Derivative Gains (Losses) Recognized In Accumulated Other Comprehensive Loss | The amounts of derivative gains (losses) recognized in accumulated other comprehensive loss were as follows (in millions):
|  | Commission |  |  | Compensation |  |  | Operating |  |  | Interest |  |  |  |
|  | Revenue |  |  | Expense |  |  | Expense |  |  | Expense |  |  | Total |
Year Ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash flow hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (0.9 | ) |  | $ | (0.9 | )
Foreign exchange contracts |  |  | 10.4 |  |  |  | 3.2 |  |  |  | 2.3 |  |  |  | — |  |  |  | 15.9 |
Total |  | $ | 10.4 |  |  | $ | 3.2 |  |  | $ | 2.3 |  |  | $ | (0.9 | ) |  | $ | 15.0 |
Year Ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash flow hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 12.4 |  |  | $ | 12.4 |
Foreign exchange contracts |  |  | (24.0 | ) |  |  | 0.1 |  |  |  | — |  |  |  | — |  |  |  | (23.9 | )
Total |  | $ | (24.0 | ) |  | $ | 0.1 |  |  | $ | — |  |  | $ | 12.4 |  |  | $ | (11.5 | )
Year Ended December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash flow hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Foreign exchange contracts |  |  | (3.3 | ) |  |  | 0.3 |  |  |  | 0.2 |  |  |  | — |  |  |  | (2.8 | )
Total |  | $ | (3.3 | ) |  | $ | 0.3 |  |  | $ | 0.2 |  |  | $ | — |  |  | $ | (2.8 | )
The amounts of derivative gains (losses) reclassified from accumulated other comprehensive loss into income (effective portion) were as follows (in millions):
|  | Commission |  |  | Compensation |  |  | Operating |  |  | Interest |  |  |  |
|  | Revenue |  |  | Expense |  |  | Expense |  |  | Expense |  |  | Total |
Year Ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash flow hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 0.4 |  |  | $ | 0.4 |
Foreign exchange contracts |  |  | (8.7 | ) |  |  | 1.8 |  |  |  | 1.3 |  |  |  | — |  |  |  | (5.6 | )
Total |  | $ | (8.7 | ) |  | $ | 1.8 |  |  | $ | 1.3 |  |  | $ | 0.4 |  |  | $ | (5.2 | )
Year Ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash flow hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 0.1 |  |  | $ | 0.1 |
Foreign exchange contracts |  |  | (9.1 | ) |  |  | 0.5 |  |  |  | 0.3 |  |  |  | — |  |  |  | (8.3 | )
Total |  | $ | (9.1 | ) |  | $ | 0.5 |  |  | $ | 0.3 |  |  | $ | 0.1 |  |  | $ | (8.2 | )
Year Ended December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash flow hedges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Foreign exchange contracts |  |  | 0.7 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 0.7 |
Total |  | $ | 0.7 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 0.7 |

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 + Details
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