Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Financial instruments
Total debt	$ 6,960	$ 7,413
Carrying amount
Financial instruments
Cash and cash equivalents	435	762
Restricted cash and cash equivalents	365	233
Long-term loans receivable from unconsolidated affiliates	10	6
Total debt	6,960	7,413
Fair value
Financial instruments
Cash and cash equivalents	435	762
Restricted cash and cash equivalents	365	233
Long-term loans receivable from unconsolidated affiliates	10	6
Total debt	$ 7,033	$ 7,308