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Derivative Assets And Liabilities (Interest Rate Swaps Outstanding) (Details) - April 2025 - Derivatives Not Designated As Hedging Instruments - Interest Rate Derivatives [Member] - Forward-Starting Swaps [Member] - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
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.