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Computer Equipment, Software, Leasehold Improvements, and Furniture, Net
 3 Months Ended
Apr. 30, 2023
Property, Plant and Equipment [Abstract]  
Computer Equipment, Software, Leasehold Improvements, and Furniture, Net Computer Equipment, Software, Leasehold Improvements, and Furniture, Net
Computer equipment, software, leasehold improvements, and furniture and equipment and the related accumulated depreciation were as follows: 
April 30, 2023January 31, 2023
Computer hardware, at cost$127 $126 
Computer software, at cost50 49 
Leasehold improvements, land and buildings, at cost365 363 
Furniture and equipment, at cost96 94 
638 632 
Less: Accumulated depreciation(498)(488)
Computer hardware, software, leasehold improvements, and furniture and equipment, net
$140 $144