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v3.20.2

Accumulated Other Comprehensive Income - Changes in AOCI (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | $ 6,814 | $ 6,975 | $ 6,932 | $ 6,814 | $ 6,975 | $ 6,814
Amounts reclassified from AOCI | (3) |  | (7) |  | (26) | (13)
Other comprehensive loss | (3) |  | (7) |  | (26) | (13)
Income taxes (benefits) on other comprehensive income (loss) | (1) |  | (2) |  | (6) | (3)
Other comprehensive loss, net of tax | (2) | (18) | (5) | (5) | (20) | (10)
Ending balance | 7,143 | 6,814 | 7,269 | 6,932 | 7,143 | 7,269
Gains & Losses on Cash Flow Hedges |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | (9) | (9) | (10) | (11) | (9) | (11)
Amounts reclassified from AOCI | 1 |  | 0 |  | 1 | 1
Other comprehensive loss | 1 |  | 0 |  | 1 | 1
Income taxes (benefits) on other comprehensive income (loss) | 0 |  | 0 |  | 0 | 0
Other comprehensive loss, net of tax | 1 |  | 0 |  | 1 | 1
Ending balance | (8) | (9) | (10) | (10) | (8) | (10)
Defined Benefit Pension & OPEB Plans |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | 11 | 29 | 46 | 52 | 29 | 52
Amounts reclassified from AOCI | (4) |  | (7) |  | (27) | (14)
Other comprehensive loss | (4) |  | (7) |  | (27) | (14)
Income taxes (benefits) on other comprehensive income (loss) | (1) |  | (2) |  | (6) | (3)
Other comprehensive loss, net of tax | (3) |  | (5) |  | (21) | (11)
Ending balance | 8 | 11 | 41 | 46 | 8 | 41
AOCI |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | 2 | 20 | 36 | 41 | 20 | 41
Other comprehensive loss, net of tax | (2) | (18) | (5) | (5) |  |
Ending balance | $ 0 | $ 2 | $ 31 | $ 36 | $ 0 | $ 31

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