Restructuring - Changes in the Liabilities Related to Workforce Reduction (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
2022 Restructuring
Restructuring Reserve [Roll Forward]
Severance and other personnel costs	$ 344	$ 1,148
Severance and Other Personnel Costs \| 2023 Restructuring
Restructuring Reserve [Roll Forward]
Beginning balance		0
Severance and other personnel costs	36	1,155
Severance and other personnel costs, net		1,056
Cash payments		(944)
Ending balance	112	112	$ 0
Severance and Other Personnel Costs \| 2022 Restructuring
Restructuring Reserve [Roll Forward]
Beginning balance		772	0
Severance and other personnel costs	4	(26)	975
Cash payments		(737)	(203)
Adjustments and foreign exchange		(35)
Ending balance	$ 0	$ 0	$ 772

Restructuring Charges, Net Of Share-Based Arrangement Expense

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

+ References

Reference 1: 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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Amount of increase (decrease) in the restructuring reserve related to foreign currency translation (gain) loss and other increases (decreases).

+ References

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