Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2022

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Pension Benefit (Income) Expense and Post-retirement Benefit Expense

Net periodic benefit (income) expense for the Combined Pension Plan and the Lumen Pension Plan (together the "Pension Plans") includes the following components:

	Pension Plans
	Three Months Ended September 30,			Nine Months Ended September 30,
	2022		2021	2022	2021
	(Dollars in millions)
Service cost	$	11	14	34	42
Interest cost	53		49	155	148
Expected return on plan assets	(100)		(138)	(302)	(414)
Settlement charges	—		57	—	57
Recognition of prior service credit	(3)		(2)	(8)	(7)
Recognition of actuarial loss	32		49	99	147
Net periodic pension (income) expense	$	(7)	29	(22)	(27)

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,
	2022		2021	2022	2021
	(Dollars in millions)
Service cost	$	3	4	8	11
Interest cost	15		12	45	35
Recognition of prior service cost	1		3	5	11
Recognition of actuarial loss	—		2	—	4
Net periodic post-retirement benefit expense	$	19	21	58	61