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Goodwill and Identifiable Assets (Tables) | 9 Months Ended
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Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The following table summarizes the activity related to the carrying amount of goodwill by segment since December 31, 2020 (in millions).
| Commercial |  | Federal Government |  |  |  | Total
Balance as of December 31, 2020 | $ | 778.6 |  |  | $ | 642.1 |  |  |  |  | $ | 1,420.7 |
2021 acquisitions | 51.1 |  |  | 94.8 |  |  |  |  | 145.9 |
Purchase price adjustments | — |  |  | 3.3 |  |  |  |  | 3.3 |
Translation adjustment | (0.4) |  |  | — |  |  |  |  | (0.4) |
Balance as of December 31, 2021 | 829.3 |  |  | 740.2 |  |  |  |  | 1,569.5 |
2022 acquisition | 246.9 |  |  | — |  |  |  |  | 246.9 |
Purchase price adjustments | 0.4 |  |  | (8.5) |  |  |  |  | (8.1) |
Translation adjustment | (2.4) |  |  | — |  |  |  |  | (2.4) |
Balance as of September 30, 2022 | $ | 1,074.2 |  |  | $ | 731.7 |  |  |  |  | $ | 1,805.9 |
________________________________ Approximately $163.6 million and $127.2 million of the goodwill for the 2022 and 2021 acquisitions, respectively, is deductible for income tax purposes.
Schedule of Acquired Intangible Assets | Acquired identifiable intangible assets consisted of the following (in millions):
|  |  | September 30, 2022 |  | December 31, 2021 |  |
| Estimated Useful Life in Years |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  |
Customer and contractual relationships | 7 - 13 |  | $ | 555.9 |  |  | $ | 299.7 |  |  | $ | 256.2 |  |  | $ | 493.9 |  |  | $ | 260.2 |  |  | $ | 233.7 |  |  |
Contractor relationships | 4 |  | — |  |  | — |  |  | — |  |  | 45.5 |  |  | 45.5 |  |  | — |  |  |
Contract Backlog | 1 - 3 |  | 34.8 |  |  | 33.8 |  |  | 1.0 |  |  | 34.8 |  |  | 31.0 |  |  | 3.8 |  |  |
Non-compete agreements | 1 - 7 |  | 39.7 |  |  | 24.3 |  |  | 15.4 |  |  | 29.4 |  |  | 21.6 |  |  | 7.8 |  |  |
|  |  | 630.4 |  |  | 357.8 |  |  | 272.6 |  |  | 603.6 |  |  | 358.3 |  |  | 245.3 |  |  |
Not subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks |  |  | 272.8 |  |  | — |  |  | 272.8 |  |  | 242.6 |  |  | — |  |  | 242.6 |  |  |
Total |  |  | $ | 903.2 |  |  | $ | 357.8 |  |  | $ | 545.4 |  |  | $ | 846.2 |  |  | $ | 358.3 |  |  | $ | 487.9 |  |  |
Schedule of Estimated Future Amortization Expense | Estimated future amortization expense follows (in millions):
Remainder of 2022 | $ | 17.8 |
2023 | 59.3 |
2024 | 49.8 |
2025 | 41.8 |
2026 | 35.4 |
Thereafter | 68.5 |
| $ | 272.6 |

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