Benefit Plans - Changes in Level 3 Plan Assets (Details) - Significant Unobservable Inputs (Level 3) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value of plan assets at January 1	$ 2,466	$ 1,865
Net Realized and Unrealized Gains/ (Losses)	(447)	(170)
Net Purchases, Issuances and Settlements	(149)	785
Net Transfers Into/(Out of) Level 3	0	0
Currency Impact	(256)	(14)
Fair value of plan assets at December 31	1,614	2,466
Corporate bonds and other fixed-income securities
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value of plan assets at January 1	2,387	1,791
Net Realized and Unrealized Gains/ (Losses)	(450)	(178)
Net Purchases, Issuances and Settlements	(148)	784
Net Transfers Into/(Out of) Level 3	0	0
Currency Impact	(249)	(10)
Fair value of plan assets at December 31	1,540	2,387
Real estate
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value of plan assets at January 1	74	70
Net Realized and Unrealized Gains/ (Losses)	3	7
Net Purchases, Issuances and Settlements	(1)	1
Net Transfers Into/(Out of) Level 3	0	0
Currency Impact	(6)	(4)
Fair value of plan assets at December 31	70	74
Private equity and other
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value of plan assets at January 1	5	4
Net Realized and Unrealized Gains/ (Losses)	0	1
Net Purchases, Issuances and Settlements	0	0
Net Transfers Into/(Out of) Level 3	0	0
Currency Impact	(1)	0
Fair value of plan assets at December 31	$ 4	$ 5

Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) For Actual Return (Loss) On Plan Assets

No definition available.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan.

+ References

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- Definition

Amount, measured using unobservable input, of increase (decrease) in plan asset of defined benefit plan from purchase, sale and settlement of trade associated with underlying investment.

+ References

+ Details

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- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan, for assets transferred into (out of) Level 3 of fair value hierarchy. Includes, but is not limited to, transfer due to change in observability of significant inputs.

+ References

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