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Derivative Assets And Liabilities Table - Interest Rate Swaps Outstanding (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Discussion of Interest Rate Derivative Risk Management Policy Interest Rate RiskWe are exposed to market risk for changes in interest rates. To maintain a cost effective capital structure, we borrow funds using a mix of fixed rate debt and variable rate debt. We also manage our interest rate exposure by utilizing interest rate swaps to achieve a desired mix of fixed and variable rate debt. We also utilize forward starting interest rate swaps to lock in the rate on a portion of our anticipated debt issuances.  
April 2025 | USAC [Member]    
Description of Interest Rate Derivative Activities [1] Pay a fixed rate of 3.9725% and receive a floating rate based on SOFR  
Derivative, Notional Amount [1] $ 0 $ 700
[1] In August 2024, USAC elected to terminate the outstanding interest rate swap.