Supplementary Information Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Jun. 30, 2023		Dec. 31, 2022	Jun. 30, 2022		Dec. 31, 2021
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 2,563		$ 3,191	$ 2,401
Restricted Cash Equivalents	400		427	369
Total Cash, Cash Equivalents and Restricted Cash Equivalents	$ 2,963	[1]	$ 3,618	$ 2,770	[1]	$ 4,836

[1] See page 16 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.