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Premises, Equipment and Leasehold Improvements | 12 Months Ended
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Dec. 31, 2019
Property, Plant and Equipment [Abstract] |
Premises, Equipment and Leasehold Improvement | PREMISES, E QUIPMENT AND L EASEHOL D I MPROVEMENTS Premises, equipment and leasehold improvements, stated at cost less accumulated depreciation and amortization, were as follows: Table 64: Premises, Equipment and Leasehold Improvements
In millions | December 31 2019 |  |  | December 31 2018 |  |
Premises, equipment and leasehold improvements | $ | 14,681 |  |  | $ | 11,864 |  |
Accumulated depreciation and amortization | (6,953 | ) |  | (6,137 | ) |
Net book value | $ | 7,728 |  |  | $ | 5,727 |  |
The following table includes depreciation expense on premises, equipment and leasehold improvements, as well as amortization expense, excluding intangible assets, primarily for capitalized internally developed software. Table 65: Depreciation and Amortization Expense
Year ended December 31 In millions | 2019 |  |  | 2018 |  |  | 2017 |  |
Depreciation | $ | 778 |  |  | $ | 754 |  |  | $ | 743 |  |
Amortization | 109 |  |  | 78 |  |  | 56 |  |
Total depreciation and amortization | $ | 887 |  |  | $ | 832 |  |  | $ | 799 |  |

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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