Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis

The following summarizes our financial assets and financial liabilities that are measured at fair value on a recurring basis:

(in millions of US dollars)	Classification	Measurement Level	December 31, 2023		December 31, 2022
Financial assets
Money market trust	Cash and cash equivalents	Level 1	$	1,582	$	390
Money market fund	Cash and cash equivalents	Level 1	$	1,205	$	—
Money market trust	Restricted cash	Level 1	$	86	$	77