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Premises, Equipment and Leasehold Improvements
12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Premises, Equipment and Leasehold Improvement PREMISES, EQUIPMENT AND LEASEHOLD IMPROVEMENTSPremises, equipment and leasehold improvements, stated at cost less accumulated depreciation and amortization, were as follows:
Table 73: Premises, Equipment and Leasehold Improvements
In millionsDecember 31
2021
December 31
2020
Premises, equipment and leasehold improvements$16,651 $14,843 
Accumulated depreciation and amortization(8,058)(7,156)
Net book value$8,593 $7,687 

Depreciation expense on premises, equipment and leasehold improvements, as well as amortization expense, excluding intangible assets, primarily for capitalized internally developed software are shown in the following table:
Table 74: Depreciation and Amortization Expense
Year ended December 31
In millions
202120202019
Depreciation$844 $791 $778 
Amortization122 115 109 
Total depreciation and amortization$966 $906 $887