Supplementary Information Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Mar. 31, 2023		Dec. 31, 2022	Mar. 31, 2022		Dec. 31, 2021
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 1,646		$ 3,191	$ 2,031
Restricted Cash Equivalents	422		427	354
Total Cash, Cash Equivalents and Restricted Cash Equivalents	$ 2,068	[1]	$ 3,618	$ 2,385	[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.