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Premises, Equipment and Leasehold Improvements (Tables) | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
Premises, Equipment and Leasehold Improvements | Premises, equipment and leasehold improvements, stated at cost less accumulated depreciation and amortization, were as follows: Table 71: Premises, Equipment and Leasehold Improvements
In millions | December 31 2020 |  | December 31 2019 |
Premises, equipment and leasehold improvements | $ | 14,843 |  |  | $ | 14,681 |  |
Accumulated depreciation and amortization | (7,156) |  |  | (6,953) |  |
Net book value | $ | 7,687 |  |  | $ | 7,728 |  |
Depreciation And Amortization Expense | Table 72: Depreciation and Amortization Expense
Year ended December 31 In millions | 2020 |  | 2019 |  | 2018 |
Depreciation | $ | 791 |  |  | $ | 778 |  |  | $ | 754 |  |
Amortization | 115 |  |  | 109 |  |  | 78 |  |
Total depreciation and amortization | $ | 906 |  |  | $ | 887 |  |  | $ | 832 |  |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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