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Employee Benefits - Additional Information (Details) - Pension Plans - New Lumen Pension Plan $ in Billions	Jan. 01, 2022 USD ($) Employee
Employee Benefits
Number of active participants (in employees) \| Employee	2,500
Number of other participants (in employees) \| Employee	19,000
Benefit obligation \| $	$ 2.5
Plan assets \| $	$ 2.2

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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