XML 54 R43.htm IDEA: XBRL DOCUMENT v3.25.1
Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disaggregation of Revenue [Line Items]    
Customer revenues $ 2,149.5 $ 1,643.0
Other revenues 33.7 63.3
Total Operating Revenues 2,183.2 1,706.3
NiSource Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 1,670.5 1,228.8
NiSource Electric Generation and Power Delivery    
Disaggregation of Revenue [Line Items]    
Customer revenues 479.0 414.2
Corporate and Other    
Disaggregation of Revenue [Line Items]    
Customer revenues 0.0 0.0
Other revenues 1.2 0.2
Corporate and Other | Unaffiliated    
Disaggregation of Revenue [Line Items]    
Revenues 1.2 0.2
NIPSCO Operations    
Disaggregation of Revenue [Line Items]    
Customer revenues 909.6 732.7
Other revenues 31.8 19.7
Total Operating Revenues 941.4 752.4
NIPSCO Operations | Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 430.6 318.5
NIPSCO Operations | NIPSCO Electric Generation    
Disaggregation of Revenue [Line Items]    
Customer revenues 479.0 414.2
Columbia Operations    
Disaggregation of Revenue [Line Items]    
Customer revenues 1,239.9 910.3
Other revenues 0.7 43.4
Residential | NiSource Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 1,142.6 840.1
Residential | NiSource Electric Generation and Power Delivery    
Disaggregation of Revenue [Line Items]    
Customer revenues 167.9 143.8
Residential | Corporate and Other    
Disaggregation of Revenue [Line Items]    
Customer revenues 0.0 0.0
Residential | NIPSCO Operations | Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 291.4 212.1
Residential | NIPSCO Operations | NIPSCO Electric Generation    
Disaggregation of Revenue [Line Items]    
Customer revenues 167.9 143.8
Residential | Columbia Operations    
Disaggregation of Revenue [Line Items]    
Customer revenues 851.2 628.0
Commercial | NiSource Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 409.6 295.1
Commercial | NiSource Electric Generation and Power Delivery    
Disaggregation of Revenue [Line Items]    
Customer revenues 160.1 142.9
Commercial | Corporate and Other    
Disaggregation of Revenue [Line Items]    
Customer revenues 0.0 0.0
Commercial | NIPSCO Operations | Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 103.1 74.7
Commercial | NIPSCO Operations | NIPSCO Electric Generation    
Disaggregation of Revenue [Line Items]    
Customer revenues 160.1 142.9
Commercial | Columbia Operations    
Disaggregation of Revenue [Line Items]    
Customer revenues 306.5 220.4
Industrial | NiSource Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 79.3 63.9
Industrial | NiSource Electric Generation and Power Delivery    
Disaggregation of Revenue [Line Items]    
Customer revenues 142.6 115.9
Industrial | Corporate and Other    
Disaggregation of Revenue [Line Items]    
Customer revenues 0.0 0.0
Industrial | NIPSCO Operations | Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 31.4 23.8
Industrial | NIPSCO Operations | NIPSCO Electric Generation    
Disaggregation of Revenue [Line Items]    
Customer revenues 142.6 115.9
Industrial | Columbia Operations    
Disaggregation of Revenue [Line Items]    
Customer revenues 47.9 40.1
Off-system | NiSource Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 22.3 12.8
Off-system | Corporate and Other    
Disaggregation of Revenue [Line Items]    
Customer revenues 0.0 0.0
Off-system | NIPSCO Operations | Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 0.0 0.0
Off-system | Columbia Operations    
Disaggregation of Revenue [Line Items]    
Customer revenues 22.3 12.8
Miscellaneous | NiSource Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 15.6 16.1
Miscellaneous | NiSource Electric Generation and Power Delivery    
Disaggregation of Revenue [Line Items]    
Customer revenues (1.4) 3.2
Miscellaneous | Corporate and Other    
Disaggregation of Revenue [Line Items]    
Customer revenues 0.0 0.0
Miscellaneous | NIPSCO Operations | Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 4.7 7.9
Miscellaneous | NIPSCO Operations | NIPSCO Electric Generation    
Disaggregation of Revenue [Line Items]    
Customer revenues (1.4) 3.2
Miscellaneous | Columbia Operations    
Disaggregation of Revenue [Line Items]    
Customer revenues 10.9 8.2
Wholesale | NiSource Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 1.1 0.8
Wholesale | NiSource Electric Generation and Power Delivery    
Disaggregation of Revenue [Line Items]    
Customer revenues 7.6 6.3
Wholesale | Corporate and Other    
Disaggregation of Revenue [Line Items]    
Customer revenues 0.0 0.0
Wholesale | NIPSCO Operations | Gas Distribution    
Disaggregation of Revenue [Line Items]    
Customer revenues 0.0 0.0
Wholesale | NIPSCO Operations | NIPSCO Electric Generation    
Disaggregation of Revenue [Line Items]    
Customer revenues 7.6 6.3
Wholesale | Columbia Operations    
Disaggregation of Revenue [Line Items]    
Customer revenues 1.1 0.8
Public Authority    
Disaggregation of Revenue [Line Items]    
Customer revenues 2.2 2.1
Public Authority | NIPSCO Operations | NIPSCO Electric Generation    
Disaggregation of Revenue [Line Items]    
Customer revenues $ 2.2 $ 2.1