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Derivative and Financial Instruments - Financial Instruments, Debt Securities Carried at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	$ 5,607	$ 5,635
Within one year | Carrying Amount
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	2	0
Short-Term Investments	495	435
Within one year | Carrying Amount | Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	0	0
Short-Term Investments	338	201
Within one year | Carrying Amount | Commercial Paper
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents	2	0
Short-Term Investments	77	131
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	43	89
Within one year | Carrying Amount | U.S. Government Agency Obligations
Debt Securities, Available-for-sale [Line Items]
Short-Term Investments	0	5
Within one year | Carrying Amount | Foreign Government Obligations
Debt Securities, Available-for-sale [Line Items]
Short-Term Investments	4	7
Within one year | Carrying Amount | Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Short-Term Investments	33	2
One year through eight years | Carrying Amount
Debt Securities, Available-for-sale [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent	1,054	989
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	612	606
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	218	189
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	7
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	12	4
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	$ 205	$ 183

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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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