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Accumulated Other Comprehensive Loss | 9 Months Ended
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Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss Information Relating to 2019 The table below summarizes changes in accumulated other comprehensive loss recorded on our consolidated balance sheet by component for the nine months ended September 30, 2019:
| Pension Plans |  | Post-Retirement Benefit Plans |  | Foreign Currency Translation Adjustment and Other |  | Interest Rate Swap |  | Total
| (Dollars in millions)
Balance at December 31, 2018 | $ | (2,173 | ) |  | (58 | ) |  | (230 | ) |  | — |  |  | (2,461 | )
Other comprehensive loss before reclassifications | — |  |  | — |  |  | (115 | ) |  | (54 | ) |  | (169 | )
Amounts reclassified from accumulated other comprehensive loss | 122 |  |  | 9 |  |  | — |  |  | — |  |  | 131 |
Net current-period other comprehensive income (loss) | 122 |  |  | 9 |  |  | (115 | ) |  | (54 | ) |  | (38 | )
Balance at September 30, 2019 | $ | (2,051 | ) |  | (49 | ) |  | (345 | ) |  | (54 | ) |  | (2,499 | )
The tables below present further information about our reclassifications out of accumulated other comprehensive loss by component for the three and nine months ended September 30, 2019:
Three Months Ended September 30, 2019 |  | Decrease (Increase) in Net Income |  | Affected Line Item in Consolidated Statement of Operations
|  | (Dollars in millions) |  |
Amortization of pension & post-retirement plans(1) |  |  |  |
Net actuarial loss |  | $ | 54 |  |  | Other income, net
Prior service cost |  | 3 |  |  | Other income, net
Total before tax |  | 57 |  |  |
Income tax benefit |  | (14 | ) |  | Income tax expense
Net of tax |  | $ | 43 |  |  |
Nine Months Ended September 30, 2019 |  | Increase (Decrease) in Net Loss |  | Affected Line Item in Consolidated Statement of Operations
|  | (Dollars in millions) |  |
Amortization of pension & post-retirement plans(1) |  |  |  |
Net actuarial loss |  | $ | 167 |  |  | Other income, net
Prior service cost |  | 7 |  |  | Other income, net
Total before tax |  | 174 |  |  |
Income tax benefit |  | (43 | ) |  | Income tax expense
Net of tax |  | $ | 131 |  |  |
________________________________________________________________________
(1) | See Note 7—Employee Benefits for additional information on our net periodic benefit expense (income) related to our pension and post-retirement plans.
Information Relating to 2018 The table below summarizes changes in accumulated other comprehensive loss recorded on our consolidated balance sheets by component for the nine months ended September 30, 2018:
| Pension Plans |  | Post-Retirement Benefit Plans |  | Foreign Currency Translation Adjustment and Other |  | Total
| (Dollars in millions)
Balance at December 31, 2017 | $ | (1,731 | ) |  | (235 | ) |  | (29 | ) |  | (1,995 | )
Other comprehensive income before reclassifications | — |  |  | — |  |  | (161 | ) |  | (161 | )
Amounts reclassified from accumulated other comprehensive loss | 97 |  |  | 11 |  |  | — |  |  | 108 |
Net current-period other comprehensive income | 97 |  |  | 11 |  |  | (161 | ) |  | (53 | )
Cumulative effect of adoption of ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income | (375 | ) |  | (32 | ) |  | — |  |  | (407 | )
Balance at September 30, 2018 | $ | (2,009 | ) |  | (256 | ) |  | (190 | ) |  | (2,455 | )
The tables below present further information about our reclassifications out of accumulated other comprehensive loss by component for the three and nine months ended September 30, 2018
Three Months Ended September 30, 2018 |  | Decrease (Increase) in Net Income |  | Affected Line Item in Consolidated Statement of Operations
|  | (Dollars in millions) |  |
Amortization of pension & post-retirement plans(1) |  |  |  |
Net actuarial loss |  | $ | 45 |  |  | Other income, net
Prior service cost |  | 3 |  |  | Other income, net
Total before tax |  | 48 |  |  |
Income tax benefit |  | (11 | ) |  | Income tax expense
Net of tax |  | $ | 37 |  |  |
Nine Months Ended September 30, 2018 |  | Decrease (Increase) in Net Income |  | Affected Line Item in Consolidated Statement of Operations
|  | (Dollars in millions) |  |
Amortization of pension & post-retirement plans(1) |  |  |  |
Net actuarial loss |  | $ | 134 |  |  | Other income, net
Prior service cost |  | 9 |  |  | Other income, net
Total before tax |  | 143 |  |  |
Income tax benefit |  | (35 | ) |  | Income tax expense
Net of tax |  | $ | 108 |  |  |
________________________________________________________________________ (1) See Note 7—Employee Benefits for additional information on our net periodic benefit expense (income) related to our pension and post-retirement plans.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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