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Business Segment Information (Tables)

3 Months Ended

Mar. 31, 2025

Segment Reporting [Abstract]

Schedule Of Operating Income Derived From Revenues And Expenses By Segment

Three Months Ended March 31, 2025
(in millions)			Columbia Operations						NIPSCO Operations						Total of Reportable Segments
Operating Revenues
External Revenue			$	1,240.6					$	941.4					$	2,182.0
Intersegment Revenue			3.2						0.3						3.5
Total Operating Revenue			$	1,243.8					$	941.7					$	2,185.5
Cost of energy			379.8						267.7						647.5
O&M			243.0						202.0						445.0
Depreciation			108.2						141.3						249.5
Total other taxes			67.0						18.5						85.5
Other segment items(1)			—						0.3						0.3
Operating Income			$	445.8					$	311.9					$	757.7

(1)Other segment items consists of Loss on Sale or Impairment of Assets and other segment income or expenses deemed insignificant which are used to reach our measurement of segment profit or loss, Operating Income.

Three Months Ended March 31, 2024
(in millions)			Columbia Operations						NIPSCO Operations						Total of Reportable Segments
Operating Revenues
External Revenue			$	953.7					$	752.4					$	1,706.1
Intersegment Revenue			3.2						0.3						3.5
Total Operating Revenue			956.9						752.7						1,709.6
Cost of energy			228.8						196.2						425.0
O&M			210.7						191.3						402.0
Depreciation			98.2						132.7						230.9
Total other taxes			57.2						16.1						73.3
Operating Income			$	362.0					$	216.4					$	578.4

The following table provides information about the assets of our reportable segments included in the Condensed Consolidated Balance Sheet (unaudited):

(in millions)			March 31, 2025						December 31, 2024
Assets
Columbia Operations			$	14,962.2					$	14,769.5
NIPSCO Operations			16,807.4						15,823.5
Corporate and Other			1,335.5						1,195.1
Consolidated Assets			$	33,105.1					$	31,788.1

To reconcile the segment tables above to consolidated NiSource:

Three Months Ended March 31, 2025
(in millions)			Total Reportable Segments						Corporate and Other						Eliminations						Consolidated NiSource
Total Operating Revenue			$	2,185.5					$	145.4					$	(147.7)					$	2,183.2
Operating Income			757.7						1.7						—						759.4

Three Months Ended March 31, 2024
(in millions)			Total Reportable Segments						Corporate and Other						Eliminations						Consolidated NiSource
Total Operating Revenue			$	1,709.6					$	140.1					$	(143.4)					$	1,706.3
Operating Income			578.4						5.0						—						583.4

X

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-25

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

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X

- References

No definition available.

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