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| | | <startDate> 2021-02-26 </startDate> |
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| | | <identifier scheme="http://www.sec.gov/CIK"> 0000093751 </identifier> |
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| | | <identifier scheme="http://www.sec.gov/CIK"> 0000093751 </identifier> |
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| | | <startDate> 2021-02-26 </startDate> |
| | | <endDate> 2021-02-26 </endDate> |
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| | <entity> |
| | | <identifier scheme="http://www.sec.gov/CIK"> 0000093751 </identifier> |
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| | | <startDate> 2021-02-26 </startDate> |
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| <dei:CityAreaCode contextRef="duration_2021-02-26_to_2021-02-26"> (617) </dei:CityAreaCode> |
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| <dei:WrittenCommunications contextRef="duration_2021-02-26_to_2021-02-26"> false </dei:WrittenCommunications> |
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| <dei:Security12bTitle contextRef="duration_2021-02-26_to_2021-02-26_us-gaap-StatementClassOfStockAxis_us-gaap-SeriesGPreferredStockMember"> Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series G, without par value per share </dei:Security12bTitle> |
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