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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

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- References

No definition available.

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- 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

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