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Accumulated Other Comprehensive Income (Tables) | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Schedule of changes in the components of accumulated other comprehensive income | The changes in the components of Accumulated Other Comprehensive Income (“AOCI”), net of tax, are as follows (in millions):
| Unrealized Translation |  | Cash Flow Hedges |  | Defined Benefit Pension Plans |  | Accumulated Other Comprehensive Income
Balance, December 31, 2014 | $ | (18.3 | ) |  | $ | (0.5 | ) |  | $ | (0.3 | ) |  | $ | (19.1 | )
Other comprehensive loss | (22.1 | ) |  | (0.7 | ) |  | (1.3 | ) |  | (24.1 | )
Balance, December 31, 2015 | (40.4 | ) |  | (1.2 | ) |  | (1.6 | ) |  | (43.2 | )
Other comprehensive (loss) income | (8.3 | ) |  | 0.8 |  |  | 0.6 |  |  | (6.9 | )
Balance, December 31, 2016 | (48.7 | ) |  | (0.4 | ) |  | (1.0 | ) |  | (50.1 | )
Other comprehensive (loss) income | 17.1 |  |  | 1.2 |  |  | 0.5 |  |  | 18.8 |
Balance, December 31, 2017 | $ | (31.6 | ) |  | $ | 0.8 |  |  | $ | (0.5 | ) |  | $ | (31.3 | )
The net changes in the components of AOCI, including the tax effect, are as follows (in millions):
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Unrealized translation | $ | 17.1 |  |  | $ | (8.3 | ) |  | $ | (22.1 | )
Defined benefit pension plans | 0.6 |  |  | 0.7 |  |  | (1.9 | )
Tax effect | (0.1 | ) |  | (0.1 | ) |  | 0.6 |
Defined benefit pension plans, net of tax | 0.5 |  |  | 0.6 |  |  | (1.3 | )
Cash flow hedges | 1.5 |  |  | 1.0 |  |  | (1.0 | )
Tax effect | (0.3 | ) |  | (0.2 | ) |  | 0.3 |
Cash flow hedges, net of tax | 1.2 |  |  | 0.8 |  |  | (0.7 | )
Change in AOCI | $ | 18.8 |  |  | $ | (6.9 | ) |  | $ | (24.1 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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