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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]  
Estimated Useful Lives Estimated useful lives are as follows:
All equipment types and furniture
3 to 10 years
Buildings40 years
Building and land improvements20 years
Software
3 to 10 years (1)
Leasehold improvementsLesser of useful life or lease term
(1) Amortized over contractual term if shorter than the estimated useful life.
Equipment, office facilities, and property are detailed below:
December 31,20232022
Software$3,375 $2,940 
Buildings1,720 1,693 
Information technology and telecommunications equipment1,133 1,008 
Leasehold improvements411 472 
Land214 209 
Construction in progress213 274 
Other380 351 
Total equipment, office facilities, and property7,446 6,947 
Accumulated depreciation and amortization(3,756)(3,233)
Total equipment, office facilities, and property — net$3,690 $3,714