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Goodwill and Other Intangible Assets
12 Months Ended
Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill And Other Intangible Assets
The following presents our goodwill balance allocated by segment as of December 31, 2025:
(in millions)
Columbia Operations
NIPSCO Operations
Total
Goodwill$1,468.1 $17.8 $1,485.9 
For our annual goodwill impairment analysis performed as of May 1, 2025, we performed a qualitative "step 0" assessment and determined that it was more likely than not that the estimated fair value of a reporting unit substantially exceeded its carrying value of our reporting unit. For this test, we assessed various assumptions, events and circumstances that would have affected the estimated fair value of the reporting unit as compared to its baseline May 1, 2024 "step 1" fair value measurement. There have been no impairments recorded during the periods presented.