XML 23 R14.htm IDEA: XBRL DOCUMENT v3.22.0.1
ARO Trust (Notes)
 12 Months Ended
Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
ARO Trust ARO Trust
We are entitled to collect in rates the amounts necessary to fund our ARO. We deposit monthly, into an external trust account (ARO Trust), the revenues specifically designated for ARO. The ARO Trust carries a moderate risk portfolio. The Money Market Funds held in our ARO Trust are considered investments. We measure the financial instruments held in our ARO Trust at fair value. However, in accordance with Topic 980, both realized and unrealized gains and losses of the ARO Trust are recorded as regulatory assets or liabilities.
Pursuant to the approved stipulation and agreement in Docket No. RP18-1126 the annual funding obligation effective March 31, 2020 is approximately $16.0 million, with deposits made monthly.
Investments within the ARO Trust were as follows (in millions):
 
December 31, 2021December 31, 2020
Amortized
Cost Basis		Fair
Value		Amortized
Cost Basis		Fair
Value
Money Market Funds$5.9 $5.9 $5.8 $5.8 
U.S. Equity Funds52.7 121.4 59.9 108.0 
International Equity Funds31.7 43.2 34.2 43.7 
Municipal Bond Funds87.7 90.0 74.9 78.0 
Total$178.0 $260.5 $174.8 $235.5