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Accumulated Other Comprehensive Income/(Loss) (Tables) | 12 Months Ended
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Dec. 31, 2020
Accumulated Other Comprehensive Income/(Loss) [Abstract] |
After-Tax Components Of Accumulated Other Comprehensive Loss | Reclassifications out of accumulated other comprehensive income/loss were as follows (net of tax):
Millions | Defined ‎benefit ‎plans | Foreign currency translation | Total
Balance at January 1, 2020 | $ | (1,150) | $ | (206) | $ | (1,356)
Other comprehensive income/(loss) before reclassifications |  | 2 |  | (6) |  | (4)
Amounts reclassified from accumulated other comprehensive income/(loss) [a] |  | (233) |  | - |  | (233)
Net year-to-date other comprehensive income/(loss), ‎net of taxes of $75 million |  | (231) |  | (6) |  | (237)
Balance at December 31, 2020 | $ | (1,381) | $ | (212) | $ | (1,593)
Balance at January 1, 2019 | $ | (1,192) | $ | (223) | $ | (1,415)
Other comprehensive income/(loss) before reclassifications |  | (86) |  | 17 |  | (69)
Amounts reclassified from accumulated other comprehensive income/(loss) [a] |  | 36 |  | - |  | 36
OPEB Plan amendment (Note 5) |  | 92 |  | - |  | 92
Net year-to-date other comprehensive income/(loss), ‎net of taxes of ($15) million |  | 42 |  | 17 |  | 59
Balance at December 31, 2019 | $ | (1,150) | $ | (206) | $ | (1,356)
[a] The accumulated other comprehensive income/loss reclassification components are 1) prior service cost/(credit) and 2) net actuarial loss which are both included in the computation of net periodic pension cost. See Note 5 Retirement Plans for additional details.

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