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Property and Equipment | 12 Months Ended
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Dec. 31, 2024
Property, Plant and Equipment [Abstract] |
Property and Equipment | Property and Equipment Property and equipment consisted of the following (in millions):
| As of December 31, |  | Depreciation Period (Years)
| 2024 |  | 2023 |
Software and internally developed software | $ | 2,061 |  |  | $ | 1,834 |  |  | 3 to 7
Computer and network equipment | 1,073 |  |  | 1,033 |  |  | 3 to 5
Land | 180 |  |  | 180 |  |  | N/A
Buildings and building improvements | 436 |  |  | 389 |  |  | 15 to 30
Right-of-use lease assets | 295 |  |  | 305 |  |  | 1 to 30
Leasehold improvements | 455 |  |  | 372 |  |  | 4 to 15
Equipment, aircraft and office furniture | 192 |  |  | 156 |  |  | 4 to 12
Total property and equipment | 4,692 |  |  | 4,269 |  |  |
Less accumulated depreciation and amortization | (2,539) |  |  | (2,346) |  |  |
Property and equipment, net | $ | 2,153 |  |  | $ | 1,923 |  |  |
In 2024, 2023 and 2022, amortization of software and internally developed software was $324 million, $284 million and $247 million, respectively, and depreciation of all other property and equipment was $201 million, $182 million and $174 million, respectively. As of December 31, 2024 and 2023, unamortized software and internally developed software was $598 million and $535 million, respectively.

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