OTHER - Reconciliation of Cash and Cash Equivalents and Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Millions		Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents		$ 13,294	$ 12,221
Restricted cash and cash equivalents	[1]	32	30
Total cash and cash equivalents and restricted cash and cash equivalents as shown in the Unaudited Consolidated Statements of Cash Flows		$ 13,326	$ 12,251	$ 9,046	$ 11,152

[1] Included in "Other current assets" in the Consolidated Balance Sheets and principally consist of amounts relating to the Company's travel-related insurance business.