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ACCUMULATED OTHER COMPREHENSIVE LOSS | 3 Months Ended
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Mar. 31, 2018
Equity [Abstract] |
ACCUMULATED OTHER COMPREHENSIVE LOSS | ACCUMULATED OTHER COMPREHENSIVE LOSS The following summary sets forth the components of accumulated other comprehensive loss, net of tax:
|  | Currency Translation Adjustments and Other |  | Net Actuarial Loss (1) |  | Prior Service (Cost)/ Credit (1) |  | Accumulated Other Comprehensive Loss
|  | (In thousands)
December 31, 2017 |  | $ | (140,438 | ) |  | (560,153 | ) |  | (6,910 | ) |  | (707,501 | )
Amortization |  | — |  |  | 5,517 |  |  | 89 |  |  | 5,606 |
Other current period change |  | 11,892 |  |  | — |  |  | — |  |  | 11,892 |
March 31, 2018 |  | $ | (128,546 | ) |  | (554,636 | ) |  | (6,821 | ) |  | (690,003 | )
|  | Currency Translation Adjustments and Other |  | Net Actuarial Loss (1) |  | Prior Service Credit (1) |  | Accumulated Other Comprehensive Loss
|  | (In thousands)
December 31, 2016 |  | $ | (206,610 | ) |  | (620,292 | ) |  | (7,130 | ) |  | (834,032 | )
Amortization |  | — |  |  | 5,011 |  |  | 53 |  |  | 5,064 |
Other current period change |  | 15,742 |  |  | — |  |  | — |  |  | 15,742 |
March 31, 2017 |  | $ | (190,868 | ) |  | (615,281 | ) |  | (7,077 | ) |  | (813,226 | )
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(1) | These amounts are included in the computation of net pension expense. See Note 14, "Employee Benefit Plans," for further information.
The gain from currency translation adjustments in the three months ended March 31, 2018 of $12 million was primarily due to the strengthening of the British Pound against the U.S. Dollar, partially offset by the weakening of the Canadian Dollar against the U.S. Dollar. The gain from currency translation adjustments in the three months ended March 31, 2017 of $16 million was due to the strengthening of the British Pound and the Canadian Dollar against the U.S. Dollar.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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- References No definition available. + Details
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