Revenue Recognition Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2025

Dec. 31, 2024

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

for the years ended December 31, 2025, 2024 and 2023:

	For the Year Ended December 31, 2025
(in millions)	Regulated Energy		Unregulated Energy		Other and Eliminations		Total
Energy distribution
Delaware natural gas division	$	103.5	$	—	$	—	$	103.5
FPU natural gas distribution	191.8		—		—		191.8
FCG	170.4		—		—		170.4
FPU electric distribution	103.9		—		—		103.9
Maryland natural gas distribution (1)	64.2		—		—		64.2
Total energy distribution	633.8		—		—		633.8
Energy transmission
Aspire Energy	—		50.4		—		50.4
Aspire Energy Express	1.5		—		—		1.5
Eastern Shore	86.9		—		—		86.9
Peninsula Pipeline	52.8		—		—		52.8
Total energy transmission	141.2		50.4		—		191.6
Energy generation
Eight Flags	—		18.1		—		18.1
Propane operations
Propane distribution operations	—		171.6		—		171.6
CNG / RNG
Marlin Gas Services	—		28.2		—		28.2
Other RNG	—		3.8		—		3.8
Total CNG / RNG Services	—		32.0		—		32.0
Other and eliminations
Eliminations	(87.2)		(0.2)		(29.9)		(117.3)
Other	—		—		0.2		0.2
Total other and eliminations	(87.2)		(0.2)		(29.7)		(117.1)
Total operating revenues (2)	$	687.8	$	271.9	$	(29.7)	$	930.0

    

(1) In accordance with the Maryland PSC approval of our natural gas base rate proceeding, effective April 2025, our natural gas distribution businesses in Maryland (Maryland natural gas division, Sandpiper Energy and Elkton Gas) are now consolidated for rate-making and other purposes and are reflected on a consolidated basis for all periods presented consistent with the final rate order. See Note 17, Rates and Other Regulatory Activities, for additional information.

(2) Total operating revenues for the year ended December 31, 2025, include other revenue (revenues from sources other than contracts with customers) of $0.8 million and $0.4 million for our Regulated and Unregulated Energy segments, respectively. The sources of other revenues include revenue from alternative revenue programs related to revenue normalization and late fees for the Maryland natural gas distribution businesses.

	For the Year Ended December 31, 2024
(in millions)	Regulated Energy		Unregulated Energy		Other and Eliminations		Total
Energy distribution
Delaware natural gas division	$	76.9	$	—	$	—	$	76.9
FPU natural gas distribution	170.3		—		—		170.3
FCG	140.3		—		—		140.3
FPU electric distribution	92.6		—		—		92.6
Maryland natural gas distribution (1)	51.9		—		—		51.9
Total energy distribution	532.0		—		—		532.0
Energy transmission
Aspire Energy	—		35.2		—		35.2
Aspire Energy Express	1.5		—		—		1.5
Eastern Shore	81.7		—		—		81.7
Peninsula Pipeline	34.5		—		—		34.5
Total energy transmission	117.7		35.2		—		152.9
Energy generation
Eight Flags	—		18.0		—		18.0
Propane operations
Propane distribution operations	—		157.9		—		157.9
CNG / RNG
Marlin Gas Services	—		16.6		—		16.6
Other RNG	—		1.0		—		1.0
Total CNG / RNG Services	—		17.6		—		17.6
Other and eliminations
Eliminations	(66.3)		(0.3)		(24.8)		(91.4)
Other	—		—		0.2		0.2
Total other and eliminations	(66.3)		(0.3)		(24.6)		(91.2)
Total operating revenues (2)	$	583.4	$	228.4	$	(24.6)	$	787.2

    

(1) In accordance with the Maryland PSC approval of our natural gas base rate proceeding, effective April 2025, our natural gas distribution businesses in Maryland (Maryland natural gas division, Sandpiper Energy and Elkton Gas) are now consolidated for rate-making and other purposes and are reflected on a consolidated basis for all periods presented consistent with the final rate order. See Note 17, Rates and Other Regulatory Activities, for additional information.

(2) Total operating revenues for the year ended December 31, 2024, include other revenue (revenues from sources other than contracts with customers) of $1.6 million and $0.4 million for our Regulated and Unregulated Energy segments, respectively. The sources of other revenues include revenue from alternative revenue programs related to revenue normalization and late fees for the Maryland natural gas distribution businesses.

	For the Year Ended December 31, 2023
(in millions)	Regulated Energy		Unregulated Energy		Other and Eliminations		Total
Energy distribution
Delaware natural gas division	$	83.9	$	—	$	—	$	83.9
FPU natural gas distribution	168.4		—		—		168.4
FCG (1)	12.1		—		—		12.1
FPU electric distribution	99.5		—		—		99.5
Maryland natural gas distribution (2)	57.1		—		—		57.1
Total energy distribution	421.0		—		—		421.0
Energy transmission
Aspire Energy	—		37.1		—		37.1
Aspire Energy Express	1.5		—		—		1.5
Eastern Shore	79.9		—		—		79.9
Peninsula Pipeline	30.4		—		—		30.4
Total energy transmission	111.8		37.1		—		148.9
Energy generation
Eight Flags	—		19.2		—		19.2
Propane operations
Propane distribution operations	—		154.7		—		154.7
Compressed Natural Gas Services
Marlin Gas Services	—		12.3		—		12.3
Other and eliminations
Eliminations	(59.2)		(0.2)		(26.3)		(85.7)
Other	—		—		0.2		0.2
Total other and eliminations	(59.2)		(0.2)		(26.1)		(85.5)
Total operating revenues (3)	$	473.6	$	223.1	$	(26.1)	$	670.6

(1) Operating revenues for FCG include amounts from the acquisition date through December 31, 2023. For additional information on FCG's results, see Note 4, Acquisitions, and discussion under Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations.

(2) In accordance with the Maryland PSC approval of our natural gas base rate proceeding, effective April 2025, our natural gas distribution businesses in Maryland (Maryland natural gas division, Sandpiper Energy and Elkton Gas) are now consolidated for rate-making and other purposes and are reflected on a consolidated basis for all periods presented consistent with the final rate order. See Note 17, Rates and Other Regulatory Activities, for additional information.

(3) Total operating revenues for the year ended December 31, 2023, include other revenue (revenues from sources other than contracts with customers) of $1.2 million and $0.4 million for our Regulated and Unregulated Energy segments, respectively. The sources of other revenues include revenue from alternative revenue programs related to revenue normalization for Maryland division and Sandpiper and late fees.

Contract with Customer, Asset and Liability [Table Text Block]

The balances of our trade receivables, contract assets, and contract liabilities as of December 31, 2025 and 2024 were as follows:

	Trade Receivables		Contract Assets (Current)		Contract Assets (Noncurrent)		Contract Liabilities (Current)
(in millions)
Balance at 12/31/2024	$	66.2	$	—	$	3.0	$	1.2
Balance at 12/31/2025	92.2		—		2.9		1.3
Increase (decrease)	$	26.0	$	—	$	(0.1)	$	0.1

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

Revenue for these businesses for the remaining performance obligations at December 31, 2025 are expected to be recognized as follows:

(in millions)	2026		2027		2028		2029		2030		2031 and thereafter
Eastern Shore and Peninsula Pipeline	$	39.2	$	35.2	$	32.8	$	30.1	$	24.0	$	150.2
Natural gas distribution operations	12.6		10.2		10.2		10.2		10.1		29.7
FPU electric distribution	1.0		0.6		0.6		0.6		—		—
Total revenue contracts with remaining performance obligations	$	52.8	$	46.0	$	43.6	$	40.9	$	34.1	$	179.9