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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Jan. 03, 2025
Accounting Policies [Abstract] |
Schedule of Changes in Estimates on Contracts for the Periods Presented | Changes in estimates on contracts for the periods presented were as follows:
|  | Year Ended
(in millions, except for per share amounts) |  | January 3, 2025 |  | December 29, 2023 |  | December 30, 2022
Favorable impact |  | $ | 184 |  |  | $ | 140 |  |  | $ | 146 |
Unfavorable impact |  | (153) |  |  | (100) |  |  | (113) |
Net favorable impact to income before income taxes |  | $ | 31 |  |  | $ | 40 |  |  | $ | 33 |
Impact on diluted EPS attributable to Leidos common stockholders |  | $ | 0.17 |  |  | $ | 0.22 |  |  | $ | 0.17 |
Schedule of Finite-Lived Intangible Assets | Intangible assets with finite lives are amortized over the following periods:
|  | Estimated useful lives (in years)
Software and technology |  | 3-15
Programs |  | 4-13
Customer relationships |  | 8-10
Schedule of Depreciation Using Estimated Useful Lives | Depreciation is recognized using the methods and estimated useful lives as follows:
|  | Depreciation method |  | Estimated useful lives (in years)
Computers and other equipment |  | Straight-line or declining-balance |  | 2-15
Buildings |  | Straight-line |  | Not to exceed 40
Building improvements and leasehold improvements |  | Straight-line |  | Shorter of useful life of asset or remaining lease term
Vehicles and transportation equipment |  | Straight-line |  | 3-15
Office furniture and fixtures |  | Straight-line or declining-balance |  | 6-9
Property, plant and equipment, net consisted of the following:
(in millions) |  | January 3, 2025 |  | December 29, 2023
Computers and other equipment |  | $ | 473 |  |  | $ | 455 |
Leasehold improvements |  | 567 |  |  | 455 |
Vehicles and transportation equipment |  | 321 |  |  | 277 |
Buildings and improvements |  | 137 |  |  | 137 |
Office furniture and fixtures |  | 78 |  |  | 66 |
Land |  | 17 |  |  | 17 |
Construction-in-progress |  | 107 |  |  | 172 |
|  | 1,700 |  |  | 1,579 |
Less: accumulated depreciation and amortization |  | (709) |  |  | (618) |
|  | $ | 991 |  |  | $ | 961 |

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