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Accumulated Other Comprehensive Loss
 12 Months Ended
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Other Comprehensive Earnings
Accumulated Other Comprehensive Loss
Information Relating to 2017
The table below summarizes changes in accumulated other comprehensive loss recorded on our consolidated balance sheet by component for the year ended December 31, 2017:
 
Pension Plans
 
Post-Retirement
Benefit Plans
 
Foreign Currency
Translation
Adjustment
and Other
 
Total
 
(Dollars in millions)
Balance at December 31, 2016
$
(1,895
)
 
(162
)
 
(60
)
 
(2,117
)
Other comprehensive income (loss) before reclassifications
39

 
(86
)
 
31

 
(16
)
Amounts reclassified from accumulated other comprehensive income
125

 
13

 
—

 
138

Net current-period other comprehensive income (loss)
164

 
(73
)
 
31

 
122

Balance at December 31, 2017
$
(1,731
)
 
(235
)
 
(29
)
 
(1,995
)

The table below presents further information about our reclassifications out of accumulated other comprehensive loss by component for the year ended December 31, 2017:
Year Ended December 31, 2017
 
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
 
$
205

 
Other income (expense), net
Prior service cost
 
12

 
Other income (expense), net
Total before tax
 
217

 
 
Income tax benefit
 
(79
)
 
Income tax expense
Net of tax
 
$
138

 
 
________________________________________________________________________
(1) 
See Note 9—Employee Benefits for additional information on our net periodic benefit (expense) income related to our pension and post-retirement plans.
Information Relating to 2016
The table below summarizes changes in accumulated other comprehensive loss recorded on our consolidated balance
sheet by component for the year ended December 31, 2016:
 
Pension Plans
 
Post-Retirement
Benefit Plans
 
Foreign Currency
Translation
Adjustment
and Other
 
Total
 
(Dollars in millions)
Balance at December 31, 2015
$
(1,715
)
 
(180
)
 
(39
)
 
(1,934
)
Other comprehensive income (loss) before reclassifications
(280
)
 
6

 
(22
)
 
(296
)
Amounts reclassified from accumulated other comprehensive income
100

 
12

 
1

 
113

Net current-period other comprehensive income (loss)
(180
)
 
18

 
(21
)
 
(183
)
Balance at December 31, 2016
$
(1,895
)
 
(162
)
 
(60
)
 
(2,117
)

The table below presents further information about our reclassifications out of accumulated other comprehensive loss by component for the year ended December 31, 2016:
Year Ended December 31, 2016
 
Decrease (Increase)
in Net Loss
 
Affected Line Item in Consolidated Statement of
Operations
 
 
(Dollars in millions)
 
 
Amortization of pension & post-retirement plans(1)
 
 
 
 
Net actuarial loss
 
$
175

 
Other income (expense), net
Prior service cost
 
12

 
Other income (expense), net
Total before tax
 
187

 
 
Income tax benefit
 
(75
)
 
Income tax expense
Insignificant items
 
$
1

 
 
Net of tax
 
$
113

 
 
________________________________________________________________________
(1) 
See Note 9—Employee Benefits for additional information on our net periodic benefit (expense) income related to our pension and post-retirement plans.