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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2018
Equity [Abstract] |
Share Repurchase Program | The Company did not repurchase any shares of its common stock under this authority during the twelve months ended December 31, 2018 and 2017. Share repurchase activity in 2016 follows (in millions, except share and per share amounts).
|  | Shares |  |  | Weighted Average Price Per Share |  |  | Total |
2016 |  |  | 1,987,187 |  |  | $ | 50.49 |  |  | $ | 100.3 |
Components of Changes in Accumulated Other Comprehensive Income (AOCI) | Changes in AOCI, net of taxes, by component follows (dollars in millions). Amounts in parentheses indicate losses.
|  | Foreign Currency Translation Adjustments |  |  | Unrealized Loss On Treasury Locks, Net |  |  | Unrealized Loss on Foreign Exchange Contracts |  |  | Unfunded Employee Benefit Obligations |  |  | Total |
Balance at December 31, 2017 |  | $ | (0.3 | ) |  | $ | (14.2 | ) |  | $ | (0.3 | ) |  | $ | (142.1 | ) |  | $ | (156.9 | )
Other comprehensive income before reclassifications |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2.4 |  |  |  | 2.4 |
Amounts reclassified from AOCI |  |  | (0.1 | ) |  |  | 4.0 |  |  |  | — |  |  |  | 11.8 |  |  |  | 15.7 |
Net current-period other comprehensive income |  |  | (0.1 | ) |  |  | 4.0 |  |  |  | — |  |  |  | 14.2 |  |  |  | 18.1 |
Balance at December 31, 2018 |  | $ | (0.4 | ) |  | $ | (10.2 | ) |  | $ | (0.3 | ) |  | $ | (127.9 | ) |  | $ | (138.8 | )
Reclassifications Out of Accumulated Other Comprehensive Income (AOCI) | The following table presents information about reclassifications out of AOCI (dollars in millions). Amounts in parentheses indicate expenses in the Consolidated Statements of Income.
|  | Amounts Reclassified from AOCI Year Ended December 31, |  |  |
Details about AOCI Components |  | 2018 |  |  | 2017 |  |  |
Unrealized loss on treasury locks, net (a) |  | $ | (5.3 | ) |  | $ | (5.7 | ) |  |
|  |  | 1.3 |  |  |  | 2.2 |  |  | Tax benefit
|  | $ | (4.0 | ) |  | $ | (3.5 | ) |  | Net of tax
Unfunded employee benefit obligations (b) |  |  |  |  |  |  |  |  |  |
Amortization of prior service costs |  | $ | (6.6 | ) |  | $ | (5.6 | ) |  |
Amortization of actuarial gains / (losses) |  |  | (9.2 | ) |  |  | (7.5 | ) |  |
|  |  | (15.8 | ) |  |  | (13.1 | ) |  | Total before tax
|  |  | 4.0 |  |  |  | 4.9 |  |  | Tax benefit
|  | $ | (11.8 | ) |  | $ | (8.2 | ) |  | Net of tax
(a) | This AOCI component is included in interest expense, net and other. Amount relates to the amortization of the effective portion of treasury lock derivative instruments recorded in AOCI. The net amount of settlement gains or losses on derivative instruments included in AOCI to be amortized over the next 12 months is a net loss of $5.2 million ($3.9 million after-tax). For a discussion of treasury lock derivative instrument activity, see Note 14, Derivative Instruments and Hedging Activities, for additional information.
(b) | These AOCI components are included in the computation of net pension and postretirement benefit costs. See Note 11, Employee Benefit Plans and Other Postretirement Benefits, for additional information.

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- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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