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Benefit Plans - Components of Net Postemployment Costs (Details) - Postemployment Benefit Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6	$ 6	$ 6
Interest cost	3	3	5
Amortization of net gains	(4)	(2)	(4)
Net periodic postemployment costs	$ 5	$ 7	$ 7

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

+ References

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- Definition

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- Definition

Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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