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Customer Concentration and Revenue Information (Tables) | 6 Months Ended
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Jul. 29, 2023
Risks and Uncertainties [Abstract] |
Schedule that Represents A Significant Portion of the Company’s Customer Base and Each Over 10% of Total Revenue | Customers whose combined amounts of accounts receivable and contract assets, net, exceeded 10% of total combined accounts receivable and contract assets, net, as of July 29, 2023 or January 28, 2023 were as follows (dollars in millions):
| July 29, 2023 |  | January 28, 2023
| Amount |  | % of Total |  | Amount |  | % of Total
Lumen Technologies | $ | 315.3 |  |  | 24.7% |  | $ | 189.3 |  |  | 17.4%
AT&T Inc. | $ | 132.4 |  |  | 10.4% |  | $ | 136.2 |  |  | 12.5%
Comcast Corporation | $ | 125.9 |  |  | 9.9% |  | $ | 125.2 |  |  | 11.5%
Frontier Communications Corporation | $ | 96.5 |  |  | 7.6% |  | $ | 153.2 |  |  | 14.0%
Customers whose contract revenues exceeded 10% of total contract revenues during the three and six months ended July 29, 2023 or July 30, 2022, as well as total contract revenues from all other customers combined, were as follows (dollars in millions):
| For the Three Months Ended |  | For the Six Months Ended |
| July 29, 2023 |  | July 30, 2022 |  | July 29, 2023 |  | July 30, 2022 |
| Amount |  | % of Total |  | Amount |  | % of Total |  | Amount |  | % of Total |  | Amount |  | % of Total |
AT&T Inc. | $ | 174.3 |  |  | 16.7% |  | $ | 255.9 |  |  | 26.3% |  | $ | 398.7 |  |  | 19.1% |  | $ | 493.3 |  |  | 26.7% |
Lumen Technologies | 162.5 |  |  | 15.6 |  | 127.6 |  |  | 13.1 |  | 298.9 |  |  | 14.3 |  | 230.4 |  |  | 12.5 |
Comcast Corporation | 119.5 |  |  | 11.5 |  | 111.8 |  |  | 11.5 |  | 240.1 |  |  | 11.5 |  | 223.0 |  |  | 12.1 |
Verizon Communications Inc. | 104.9 |  |  | 10.1 |  | 80.8 |  | 8.3 |  | 204.9 |  |  | 9.8 |  | 161.8 |  | 8.8 |
Total other customers combined | 480.3 |  |  | 46.1 |  | 396.2 |  | 40.8 |  | 944.4 |  |  | 45.3 |  | 740.1 |  | 39.9 |
Total contract revenues | $ | 1,041.5 |  |  | 100.0% |  | $ | 972.3 |  |  | 100.0% |  | $ | 2,087.0 |  |  | 100.0% |  | $ | 1,848.6 |  |  | 100.0% |
Total contract revenues by customer type during the three and six months ended July 29, 2023 and July 30, 2022 were as follows (dollars in millions):
| For the Three Months Ended |  | For the Six Months Ended |
| July 29, 2023 |  | July 30, 2022 |  | July 29, 2023 |  | July 30, 2022 |
| Amount |  | % of Total |  | Amount |  | % of Total |  | Amount |  | % of Total |  | Amount |  | % of Total |
Telecommunications | $ | 927.1 |  |  | 89.0% |  | $ | 871.0 |  |  | 89.6% |  | $ | 1,865.3 |  |  | 89.4% |  | $ | 1,649.9 |  |  | 89.3% |
Underground facility locating | 76.7 |  |  | 7.4 |  | 71.4 |  |  | 7.3 |  | 149.6 |  |  | 7.2 |  | 142.3 |  |  | 7.7 |
Electrical and gas utilities and other | 37.7 |  |  | 3.6 |  | 29.9 |  |  | 3.1 |  | 72.1 |  |  | 3.4 |  | 56.4 |  |  | 3.0 |
Total contract revenues | $ | 1,041.5 |  |  | 100.0% |  | $ | 972.3 |  |  | 100.0% |  | $ | 2,087.0 |  |  | 100.0% |  | $ | 1,848.6 |  |  | 100.0% |

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