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Affiliate Transactions
9 Months Ended
Sep. 30, 2024
Related Party Transactions [Abstract]  
Related Party Transactions Disclosure
We provide incumbent local exchange carrier telecommunications services to our affiliates that we also provide to external customers. These services are priced at regulated rates, where applicable, or otherwise at rates we believe are consistent with non-regulated market-based rates charged to external customers.

We also provide to our affiliates shared services in the form of application development and support services, as well as network support and technical services, and administrative and corporate support. In this regard, we function as a service company to other Lumen affiliates, and correspondingly recognize affiliate revenue based on the costs for the services that we provide to those affiliates.

Whenever possible, costs for shared services are incurred directly by our affiliates for the services they use. When these shared costs are not directly incurred, they are allocated among all affiliates based upon what we determine to be the most reasonable method, first using cost causative measures, or, if no cost causative measure is available, using a general allocator. From time to time, we may adjust the basis for allocating the costs of a shared service among affiliates. Any such changes in allocation methodologies are applied prospectively.
The following table provides details of affiliate revenue for the three and nine months ended September 30, 2024 and 2023:
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
 (Dollars in millions)
Direct affiliate revenue
$423 395 1,241 1,189 
Allocated affiliate revenue
147 131 435 400 
Total affiliate revenue
$570 526 1,676 1,589 
We also purchase services from our affiliates including telecommunication services, insurance, flight services and other support services such as legal, regulatory, finance administration and executive support. Our affiliates charge us for these services using the allocation methodologies described above.