XML 48 R33.htm IDEA: XBRL DOCUMENT
v3.25.3

Employee Benefits (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Components of Net Periodic Pension Benefit Expense and Post-retirement Benefit Expense | Net periodic benefit expense for the Lumen Combined Pension Plan (the "Combined Pension Plan" or the "Plan") includes the following components:
| Combined Pension Plan
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
| (Dollars in millions)
Service cost | $ | 5 |  |  | 6 |  |  | 16 |  |  | 18 |
Interest cost | 61 |  |  | 63 |  |  | 181 |  |  | 188 |
Expected return on plan assets | (64) |  |  | (68) |  |  | (191) |  |  | (204) |
Recognition of prior service credit | — |  |  | (3) |  |  | (1) |  |  | (6) |
Recognition of actuarial loss | 36 |  |  | 28 |  |  | 108 |  |  | 82 |
Net periodic pension expense | $ | 38 |  |  | 26 |  |  | 113 |  |  | 78 |
Net periodic benefit expense for our post-retirement benefit plans includes the following components:
| Post-Retirement Benefit Plans
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
| (Dollars in millions)
Service cost | $ | — |  |  | 1 |  |  | 2 |  |  | 3 |
Interest cost | 22 |  |  | 23 |  |  | 66 |  |  | 70 |
Recognition of prior service credit | (3) |  |  | (1) |  |  | (6) |  |  | (5) |
Recognition of actuarial gain | (6) |  |  | (4) |  |  | (19) |  |  | (13) |
Special termination benefits charge | — |  |  | — |  |  | — |  |  | 2 |
Net periodic post-retirement benefit expense | $ | 13 |  |  | 19 |  |  | 43 |  |  | 57 |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration