Supplementary Information Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Sep. 30, 2023		Dec. 31, 2022	Sep. 30, 2022		Dec. 31, 2021
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 2,254		$ 3,191	$ 2,199
Restricted Cash Equivalents	522		427	420
Total Cash, Cash Equivalents and Restricted Cash Equivalents	$ 2,776	[1]	$ 3,618	$ 2,619	[1]	$ 4,836

[1] See page 17 for reconciliation of cash and cash equivalents and restricted cash equivalents presented in interim Consolidated Balance Sheets to total cash, cash equivalents and restricted cash equivalents presented in the interim Consolidated Statements of Cash Flows.