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Derivative and Financial Instruments - Financial Instruments, Debt Securities Carried at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	$ 5,635	$ 6,458
Within one year | Carrying Amount
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	0	97
Short-Term Investments	435	603
Within one year | Carrying Amount | Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	0	0
Short-Term Investments	201	323
Within one year | Carrying Amount | Commercial Paper
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	0	97
Short-Term Investments	131	156
Within one year | Carrying Amount | U.S. Government Obligations
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	0	0
Short-Term Investments	89	115
Within one year | Carrying Amount | U.S. Government Agency Obligations
Debt Securities, Available-for-sale [Line Items]
Short-Term Investments	5	8
Within one year | Carrying Amount | Foreign Government Obligations
Debt Securities, Available-for-sale [Line Items]
Short-Term Investments	7	0
Within one year | Carrying Amount | Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Short-Term Investments	2	1
One year through eight years | Carrying Amount
Debt Securities, Available-for-sale [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent	989	522
One year through eight years | Carrying Amount | Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent	606	309
One year through eight years | Carrying Amount | U.S. Government Obligations
Debt Securities, Available-for-sale [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent	189	63
One year through eight years | Carrying Amount | U.S. Government Agency Obligations
Debt Securities, Available-for-sale [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent	7	5
One year through eight years | Carrying Amount | Foreign Government Obligations
Debt Securities, Available-for-sale [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent	4	7
One year through eight years | Carrying Amount | Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent	$ 183	$ 138

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Amount of investments including trading securities, held-to-maturity securities, and short-term investments classified as other and current but excluding investement in Cenovus Energy Common Shares.

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Amount, after allowance for credit loss, of accounts and financing receivables, classified as noncurrent. Includes, but is not limited to, notes and loan receivable.

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