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Employee Benefit Plans - Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Before tax basis amount in accumulated other comprehensive loss.
Total recognized at December 31	$ 4,979	$ 7,278
Other Benefits
Before tax basis amount in accumulated other comprehensive loss.
Net actuarial loss	134	260
Prior service (credit) costs	(159)	(186)
Total recognized at December 31	(25)	74
U.S. | Pension Benefits
Before tax basis amount in accumulated other comprehensive loss.
Net actuarial loss	4,007	5,714
Prior service (credit) costs	2	3
Total recognized at December 31	4,009	5,717
Int’l. | Pension Benefits
Before tax basis amount in accumulated other comprehensive loss.
Net actuarial loss	920	1,401
Prior service (credit) costs	75	86
Total recognized at December 31	$ 995	$ 1,487

X

- Definition

Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

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- Definition

Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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- Definition

Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

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