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Consolidated Statement of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statement of Comprehensive Income
Net actuarial gains (losses) and prior service cost and credits and amortization of net actuarial losses and prior service cost and credits taxes	$ (79)	$ (238)	$ 47
Net (losses) gains on derivative instruments designated as cash flow hedges taxes	$ (87)	$ (17)	$ 50

X

- Definition

Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

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-Topic 220
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- Definition

Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

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