Liabilities, Commitments and Contingencies - Schedule of Environmental Remediation Activity (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022
Environmental [Roll Forward]
Beginning balance – January 1	$ 752	$ 605
Reductions for payments made, net of recoveries	(46)	(22)
Changes in estimates	149	171
Ending balance – September 30	$ 855	$ 754

Total costs accrued as of the balance sheet date for environmental loss contingencies.

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 410
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 410
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 410
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Amount of expense (reversal of expense) which increases (decreases) the accrual for environmental loss contingencies from revisions in estimates to existing obligations. Excludes changes related to business acquisitions, divestitures, or currency movement.

+ References

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- Definition

Amount of cash outflow to settle environmental loss contingencies.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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