Subsequent Events	12 Months Ended
Dec. 31, 2023
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Transaction Support Agreement On January 22, 2024, the Company, Level 3, Qwest and a group of creditors holding a majority of our consolidated debt (the "TSA Parties") amended and restated the transaction support agreement that we originally entered into with a subset of the TSA Parties on October 31, 2023 (as amended and restated, the “Transaction Support Agreement”). The Transaction Support Agreement defines the parties’ commitments to effect a series of transactions (the “TSA Transactions”) set forth in the term sheet attached thereto (the “Term Sheet”). Among other things and subject to the terms and conditions set forth therein, the Transaction Support Agreement, including the Term Sheet, contemplates: •the incurrence by Level 3 of $1.325 billion in new money long term senior secured first lien indebtedness, which indebtedness will be backstopped by certain of the consenting lenders; •a new revolving credit facility at Lumen in an amount expected to be approximately $1 billion; •the extension of maturities, covenant modifications and rate increases of certain secured and unsecured indebtedness at the Company and Level 3 through a series of exchanges and other debt transactions with certain consenting lenders as set forth in the Term Sheet; and •the repayment of certain indebtedness of the Company and Qwest. The outside date for completion of the TSA Transactions under the Transaction Support Agreement is February 29, 2024, which the Company may unilaterally extend at its discretion to March 31, 2024. The Company expects to consummate the TSA Transactions in the first quarter of 2024, subject to the satisfaction of remaining closing conditions. Following consummation of the TSA Transactions, the Company may assess potential follow-on transactions with respect to non-participating creditors. Additional information about the Transaction Support Agreement and the TSA Transactions is available in our Current Report on Form 8-K filed with the Securities and Exchange Commission on January 25, 2024, and Exhibit 10.16 to this annual report. Tax Refund During the year ended December 31, 2023 we requested a U.S. Federal income tax refund of approximately $900 million. We applied approximately $200 million of that refund to pay our 2023 estimated taxes and, in January 2024, we received a cash refund of approximately $729 million, including interest.

On January 22, 2024, the Company, Level 3, Qwest and a group of creditors holding a majority of our consolidated debt (the "TSA Parties") amended and restated the transaction support agreement that we originally entered into with a subset of the TSA Parties on October 31, 2023 (as amended and restated, the “Transaction Support Agreement”).

The Transaction Support Agreement defines the parties’ commitments to effect a series of transactions (the “TSA Transactions”) set forth in the term sheet attached thereto (the “Term Sheet”). Among other things and subject to the terms and conditions set forth therein, the Transaction Support Agreement, including the Term Sheet, contemplates:

•the incurrence by Level 3 of $1.325 billion in new money long term senior secured first lien indebtedness, which indebtedness will be backstopped by certain of the consenting lenders;

•a new revolving credit facility at Lumen in an amount expected to be approximately $1 billion;

•the extension of maturities, covenant modifications and rate increases of certain secured and unsecured indebtedness at the Company and Level 3 through a series of exchanges and other debt transactions with certain consenting lenders as set forth in the Term Sheet; and

The outside date for completion of the TSA Transactions under the Transaction Support Agreement is February 29, 2024, which the Company may unilaterally extend at its discretion to March 31, 2024. The Company expects to consummate the TSA Transactions in the first quarter of 2024, subject to the satisfaction of remaining closing conditions.

Following consummation of the TSA Transactions, the Company may assess potential follow-on transactions with respect to non-participating creditors.

Additional information about the Transaction Support Agreement and the TSA Transactions is available in our Current Report on Form 8-K filed with the Securities and Exchange Commission on January 25, 2024, and Exhibit 10.16 to this annual report.

During the year ended December 31, 2023 we requested a U.S. Federal income tax refund of approximately $900 million. We applied approximately $200 million of that refund to pay our 2023 estimated taxes and, in January 2024, we received a cash refund of approximately $729 million, including interest.