Acquisitions, Dispositions And Other Adjustments	12 Months Ended
Dec. 31, 2025
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]
Acquisitions, Dispositions And Other Adjustments	NOTE 6. ACQUISITIONS, DISPOSITIONS AND OTHER ADJUSTMENTS Spectrum Auctions In February 2021, the FCC announced that AT&T was the winning bidder for 1,621 C-Band licenses, comprised of a total of 80 MHz nationwide, including 40 MHz in Phase I. We received the licenses in July 2021 and classified the auction deposits, related capitalized interest and billed relocation costs as “Licenses – Net” on our December 31, 2021 consolidated balance sheet. In December 2021, we paid $955 of Incentive Payments upon clearing of Phase I spectrum and paid $2,112 upon clearing of Phase II spectrum in 2023. Pending Acquisitions Spectrum On August 25, 2025, we agreed to purchase FCC licenses in the 600 MHz and 3.45 GHz bands from EchoStar Corporation for approximately $23,000, subject to certain adjustments. The transaction is expected to close in early 2026 and is subject to regulatory approval and other closing conditions. The FCC licenses will be used to expand our 5G network, meet future capacity demands and support future wireless communications services. We signed a short-term spectrum manager lease on the 3.45 GHz spectrum, which was deployed in cell sites covering nearly two-thirds of the U.S. population. Fiber On May 21, 2025, we agreed to acquire substantially all of Lumen’s Mass Markets fiber business for $5,750 cash, subject to purchase price adjustments. At the time of signing, the pending acquisition covered approximately one million fiber customers, and also included fiber network assets that reached more than four million fiber locations. On February 2, 2026, we completed the transaction and expect to manage the customer relationships in our Consumer Wireline business and place the fiber network assets in a new, wholly owned subsidiary. We plan to sell a controlling interest in the subsidiary to an equity partner that will co-invest in the ongoing business, and, as such, it is expected to meet the criteria for discontinued operations.

Spectrum Auctions In February 2021, the FCC announced that AT&T was the winning bidder for 1,621 C-Band licenses, comprised of a total of 80 MHz nationwide, including 40 MHz in Phase I. We received the licenses in July 2021 and classified the auction deposits, related capitalized interest and billed relocation costs as “Licenses – Net” on our December 31, 2021 consolidated balance sheet. In December 2021, we paid $955 of Incentive Payments upon clearing of Phase I spectrum and paid $2,112 upon clearing of Phase II spectrum in 2023.

Spectrum On August 25, 2025, we agreed to purchase FCC licenses in the 600 MHz and 3.45 GHz bands from EchoStar Corporation for approximately $23,000, subject to certain adjustments. The transaction is expected to close in early 2026 and is subject to regulatory approval and other closing conditions. The FCC licenses will be used to expand our 5G network, meet future capacity demands and support future wireless communications services. We signed a short-term spectrum manager lease on the 3.45 GHz spectrum, which was deployed in cell sites covering nearly two-thirds of the U.S. population.

Fiber On May 21, 2025, we agreed to acquire substantially all of Lumen’s Mass Markets fiber business for $5,750 cash, subject to purchase price adjustments. At the time of signing, the pending acquisition covered approximately one million fiber customers, and also included fiber network assets that reached more than four million fiber locations. On February 2, 2026, we completed the transaction and expect to manage the customer relationships in our Consumer Wireline business and place the fiber network assets in a new, wholly owned subsidiary. We plan to sell a controlling interest in the subsidiary to an equity partner that will co-invest in the ongoing business, and, as such, it is expected to meet the criteria for discontinued operations.