Securities - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Debt Securities, Available-for-sale [Line Items] | |||
| Fair Value | $ 245,639 | $ 229,366 | |
| Credit-related OTTI losses | 24 | 33 | $ 41 |
| Cumulative credit losses on debt securities held | 85 | 120 | $ 274 |
| Other assets | |||
| Debt Securities, Available-for-sale [Line Items] | |||
| Equity securities, fair value | 891 | ||
| Equity securities, cost | 183 | ||
| Time Deposits Placed and Other Short-term Investments | |||
| Debt Securities, Available-for-sale [Line Items] | |||
| Time deposits placed and other short-term investments | 1,000 | ||
| Nonperforming Financing Receivable | |||
| Debt Securities, Available-for-sale [Line Items] | |||
| Fair Value | 9 | $ 11 | |
| Debt securities | |||
| Debt Securities, Available-for-sale [Line Items] | |||
| Accumulated net unrealized gain (loss) on AFS debt securities | 1,800 | ||
| Accumulated other comprehensive income tax expense (benefit) | $ 569 | ||
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- Definition Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Tax No definition available.
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- Definition Time Deposits Placed And Other Short-Term Investments, Fair Value Disclosure No definition available.
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- Definition Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. No definition available.
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- Definition The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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