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Capital Stock, Accumulated Other Comprehensive Loss and Equity (Tables) | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Summary of Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax | A summary of changes in accumulated other comprehensive loss, net of tax is shown below (in millions):
For the year ended December 31, | 2017 |  | 2016 |  | 2015
Defined benefit plans: |  |  |  |  |
Balance at beginning of year | $ | (192.8 | ) |  | $ | (194.6 | ) |  | $ | (219.2 | )
Reclassification adjustments (net of tax expense of $1.1 million in 2017, $12.1 million in 2016 and $1.4 million in 2015) | 4.9 |  |  | 25.9 |  |  | 4.2 |
Other comprehensive income (loss) recognized during the period (net of tax benefit (expense) of ($0.4) million in 2017, $5.0 million in 2016 and ($6.9) million in 2015) | 3.9 |  |  | (24.1 | ) |  | 20.4 |
Balance at end of year | $ | (184.0 | ) |  | $ | (192.8 | ) |  | $ | (194.6 | )
Derivative instruments and hedging activities: |  |  |  |  |
Balance at beginning of year | $ | (45.1 | ) |  | $ | (38.7 | ) |  | $ | (33.2 | )
Reclassification adjustments (net of tax expense of $3.1 million in 2017, $28.8 million in 2016 and $14.9 million in 2015) | 6.4 |  |  | 57.9 |  |  | 23.7 |
Other comprehensive income (loss) recognized during the period (net of tax benefit (expense) of ($12.8) million in 2017, $32.7 million in 2016 and $18.4 million in 2015) | 15.8 |  |  | (64.3 | ) |  | (29.2 | )
Balance at end of year | $ | (22.9 | ) |  | $ | (45.1 | ) |  | $ | (38.7 | )
Cumulative translation adjustments: |  |  |  |  |
Balance at beginning of year | $ | (597.7 | ) |  | $ | (496.8 | ) |  | $ | (249.6 | )
Other comprehensive income (loss) recognized during the period (net of tax benefit of $— million in 2017, $1.1 million in 2016 and $6.0 million in 2015) | 291.2 |  |  | (100.9 | ) |  | (247.2 | )
Balance at end of year | $ | (306.5 | ) |  | $ | (597.7 | ) |  | $ | (496.8 | )

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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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