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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 table shows the changes in accumulated other comprehensive loss by component. Amounts in parentheses indicate debits.
(In millions) | Pension Benefits |  | Other Benefits |  | Gain on Cash Flow Hedge |  | Workers Compensation |  | Total
Balance as of December 31, 2016 | $ | (233 | ) |  | $ | (7 | ) |  | $ | 4 |  |  | $ | 2 |  |  | $ | (234 | )
Other comprehensive loss before reclassifications | (1 | ) |  | — |  |  | — |  |  | — |  |  | (1 | )
Amounts reclassified from accumulated other comprehensive loss: |  |  |  |  |  |  |  |  |
Amortization – prior service credit(a) | (10 | ) |  | (1 | ) |  | — |  |  | — |  |  | (11 | )
– actuarial loss(a) | 9 |  |  | — |  |  | — |  |  | — |  |  | 9 |
– settlement loss(a) | — |  |  | — |  |  | — |  |  | — |  |  | — |
Tax effect | — |  |  | — |  |  | — |  |  | — |  |  | — |
Other comprehensive loss | (2 | ) |  | (1 | ) |  | — |  |  | — |  |  | (3 | )
Balance as of March 31, 2017 | $ | (235 | ) |  | $ | (8 | ) |  | $ | 4 |  |  | $ | 2 |  |  | $ | (237 | )
(In millions) | Pension Benefits |  | Other Benefits |  | Gain on Cash Flow Hedge |  | Workers Compensation |  | Total
Balance as of December 31, 2017 | $ | (190 | ) |  | $ | (48 | ) |  | $ | 4 |  |  | $ | 3 |  |  | $ | (231 | )
Other comprehensive loss before reclassifications | — |  |  | — |  |  | (2 | ) |  | — |  |  | (2 | )
Amounts reclassified from accumulated other comprehensive loss: |  |  |  |  |  |  |  |  |
Amortization – prior service credit(a) | (8 | ) |  | (1 | ) |  | — |  |  | — |  |  | (9 | )
– actuarial loss(a) | 9 |  |  | — |  |  | — |  |  | — |  |  | 9 |
– settlement loss(a) | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Tax effect | (1 | ) |  | — |  |  | — |  |  | — |  |  | (1 | )
Other comprehensive income (loss) | 1 |  |  | (1 | ) |  | (2 | ) |  | — |  |  | (2 | )
Balance as of March 31, 2018 | $ | (189 | ) |  | $ | (49 | ) |  | $ | 2 |  |  | $ | 3 |  |  | $ | (233 | )
(a) | These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost. See Note 20.

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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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