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Fair Values - Not Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Card Member receivables |  |
Fair Values (Textuals) |  |
Financing receivables, gross | $ 60,411 | $ 57,613
Card Member loans |  |
Fair Values (Textuals) |  |
Financing receivables, gross | 125,995 | 107,964
Variable Interest Entity, Primary Beneficiary | Card Member receivables |  |
Fair Values (Textuals) |  |
Financing receivables, gross | 4,587 | 5,193
Variable Interest Entity, Primary Beneficiary | Card Member loans |  |
Fair Values (Textuals) |  |
Financing receivables, gross | 28,590 | 28,461
Reported Value Measurement |  |
Financial assets for which carrying values equal or approximate fair value |  |
Cash and cash equivalents | 47,000 | 34,000
Other financial assets | 63,000 | 60,000
Financial assets carried at other than fair value |  |
Loans, net | 128,000 | 110,000
Financial Liabilities: |  |
Financial liabilities for which carrying values equal or approximate fair value | 143,000 | 123,000
Financial liabilities carried at other than fair value |  |
Long-term debt | 48,000 | 43,000
Reported Value Measurement | Certificates of deposit |  |
Financial liabilities carried at other than fair value |  |
Financial liabilities | 19,000 | 16,000
Estimate of Fair Value Measurement |  |
Financial assets for which carrying values equal or approximate fair value |  |
Cash and cash equivalents | 47,000 | 34,000
Other financial assets | 63,000 | 60,000
Financial Liabilities: |  |
Financial liabilities for which carrying values equal or approximate fair value | 143,000 | 123,000
Estimate of Fair Value Measurement | Variable Interest Entity, Primary Beneficiary | Card Member receivables |  |
Fair Values (Textuals) |  |
Financing receivables, gross | 4,600 | 5,200
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 |  |
Financial assets for which carrying values equal or approximate fair value |  |
Cash and cash equivalents | 45,000 | 32,000
Other financial assets | 0 | 0
Financial Liabilities: |  |
Financial liabilities for which carrying values equal or approximate fair value | 0 | 0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 |  |
Financial assets for which carrying values equal or approximate fair value |  |
Cash and cash equivalents | 2,000 | 2,000
Other financial assets | 63,000 | 60,000
Financial Liabilities: |  |
Financial liabilities for which carrying values equal or approximate fair value | 143,000 | 123,000
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 |  |
Financial assets for which carrying values equal or approximate fair value |  |
Cash and cash equivalents | 0 | 0
Other financial assets | 0 | 0
Financial Liabilities: |  |
Financial liabilities for which carrying values equal or approximate fair value | 0 | 0
Portion at Other than Fair Value Measurement |  |
Financial assets carried at other than fair value |  |
Loans, net | 133,000 | 113,000
Financial liabilities carried at other than fair value |  |
Long-term debt | 48,000 | 42,000
Portion at Other than Fair Value Measurement | Certificates of deposit |  |
Financial liabilities carried at other than fair value |  |
Financial liabilities | 18,000 | 16,000
Portion at Other than Fair Value Measurement | Variable Interest Entity, Primary Beneficiary |  |
Financial liabilities carried at other than fair value |  |
Long-term debt | 13,300 | 12,300
Portion at Other than Fair Value Measurement | Variable Interest Entity, Primary Beneficiary | Card Member loans |  |
Fair Values (Textuals) |  |
Financing receivables, gross | 28,600 | 28,400
Portion at Other than Fair Value Measurement | Fair Value, Inputs, Level 1 |  |
Financial assets carried at other than fair value |  |
Loans, net | 0 | 0
Financial liabilities carried at other than fair value |  |
Long-term debt | 0 | 0
Portion at Other than Fair Value Measurement | Fair Value, Inputs, Level 1 | Certificates of deposit |  |
Financial liabilities carried at other than fair value |  |
Financial liabilities | 0 | 0
Portion at Other than Fair Value Measurement | Fair Value, Inputs, Level 2 |  |
Financial assets carried at other than fair value |  |
Loans, net | 0 | 0
Financial liabilities carried at other than fair value |  |
Long-term debt | 48,000 | 42,000
Portion at Other than Fair Value Measurement | Fair Value, Inputs, Level 2 | Certificates of deposit |  |
Financial liabilities carried at other than fair value |  |
Financial liabilities | 18,000 | 16,000
Portion at Other than Fair Value Measurement | Fair Value, Inputs, Level 3 |  |
Financial assets carried at other than fair value |  |
Loans, net | 133,000 | 113,000
Financial liabilities carried at other than fair value |  |
Long-term debt | 0 | 0
Portion at Other than Fair Value Measurement | Fair Value, Inputs, Level 3 | Certificates of deposit |  |
Financial liabilities carried at other than fair value |  |
Financial liabilities | $ 0 | $ 0

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