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Condensed Consolidated Statement of Comprehensive Income (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Condensed Consolidated Statement of Comprehensive Income |  |  |  |
Net actuarial gains (losses) and amortization of net actuarial losses and prior service costs and credits taxes | $ 18 | $ 13 | $ 36 | $ 28
Net gains (losses) for derivative instruments designated as cash flow hedges taxes | $ 2 | $ (29) | $ 48 | $ 19

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