Subsequent Event	3 Months Ended
Mar. 31, 2026
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event Pending Acquisition On May 4, 2026, our wholly owned subsidiary, Level 3 Communications, LLC ("Level 3 Communications"), entered into an agreement and plan of merger to acquire Alkira, Inc. ("Alkira"). Pursuant to the merger agreement, Apollo Sub, Inc., a wholly owned subsidiary of Level 3 Communications, will be merged with and into Alkira, with Alkira surviving the merger as a wholly-owned subsidiary of Level 3 Communications, for $475 million in cash subject to customary working capital and other post-closing adjustments. The transaction is subject to customary closing conditions and regulatory review. We currently expect the transaction to close in the third quarter of 2026.

Subsequent Event

3 Months Ended

Mar. 31, 2026

Pending Acquisition

On May 4, 2026, our wholly owned subsidiary, Level 3 Communications, LLC ("Level 3 Communications"), entered into an agreement and plan of merger to acquire Alkira, Inc. ("Alkira"). Pursuant to the merger agreement, Apollo Sub, Inc., a wholly owned subsidiary of Level 3 Communications, will be merged with and into Alkira, with Alkira surviving the merger as a wholly-owned subsidiary of Level 3 Communications, for $475 million in cash subject to customary working capital and other post-closing adjustments. The transaction is subject to customary closing conditions and regulatory review. We currently expect the transaction to close in the third quarter of 2026.