Note 14 - Information by Operating Segment (Tables)

12 Months Ended

Sep. 30, 2024

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Gas		Gas
2024	Utility		Marketing		Midstream		Other			Eliminations			Consolidated
Revenues from external customers		2,436.2		99.2		56.9		0.7			—		$	2,593.0
Intersegment revenues		1.7		—		43.8		16.9			(62.4	)		—
Total Operating Revenues		2,437.9		99.2		100.7		17.6			(62.4	)		2,593.0
Depreciation and amortization expense		263.6		1.5		12.8		0.5			—			278.4
Interest expense		147.3		—		7.0		93.1			(46.3	)		201.1
Income tax expense (benefit)		48.0		10.8		9.6		(9.7	)		—			58.7
Adjusted earnings (loss)		220.8		23.4		33.5		(30.3	)		—			247.4
Capital expenditures		691.1		0.1		171.3		—			(1.2	)		861.3

	Gas		Gas
2023	Utility		Marketing		Midstream		Other			Eliminations			Consolidated
Revenues from external customers	$	2,456.6	$	179.1	$	29.9	$	0.7		$	—		$	2,666.3
Intersegment revenues		0.3		—		36.2		16.0			(52.5	)		—
Total Operating Revenues		2,456.9		179.1		66.1		16.7			(52.5	)		2,666.3
Depreciation and amortization expense		244.4		1.5		8.4		0.5			—			254.8
Interest expense		139.9		—		8.6		72.1			(34.9	)		185.7
Income tax expense (benefit)		32.7		12.8		3.8		(10.5	)		—			38.8
Adjusted earnings (loss)		200.5		47.6		14.1		(34.1	)		—			228.1
Capital expenditures		588.6		0.4		73.6		(0.1	)		—			662.5

	Gas		Gas
2022	Utility		Marketing		Midstream		Other			Eliminations			Consolidated
Revenues from external customers	$	1,945.6	$	234.9	$	17.4	$	0.6		$	—		$	2,198.5
Intersegment revenues		0.5		—		35.7		15.5			(51.7	)		—
Total Operating Revenues		1,946.1		234.9		53.1		16.1			(51.7	)		2,198.5
Depreciation and amortization expense		227.9		1.4		7.5		0.5			—			237.3
Interest expense		86.4		—		4.9		37.3			(8.8	)		119.8
Income tax expense (benefit)		49.6		11.9		4.5		(7.1	)		—			58.9
Adjusted earnings (loss)		202.7		27.0		11.1		(24.5	)		—			216.3
Capital expenditures		528.6		0.9		22.6		0.1			—			552.2

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

Total Assets at End of Year	2024			2023			2022
Gas Utility	$	8,767.2		$	8,486.7		$	8,042.8
Gas Marketing		206.1			332.0			638.7
Midstream		903.4			574.3			446.0
Other		2,689.8			2,533.3			2,705.5
Eliminations		(1,705.8	)		(1,612.7	)		(1,749.3	)
Total Assets	$	10,860.7		$	10,313.6		$	10,083.7

Reconciliation Of Consolidated Net Economic Earnings To Consolidated Net Income [Table Text Block]

Reconciliation of Consolidated Net Income to Consolidated Adjusted Earnings	2024			2023			2022
Net Income	$	250.9		$	217.5		$	220.8
Adjustments, pre-tax:
Fair value and timing adjustments		(12.4	)		11.4			(11.4	)
Acquisition and restructuring activities		7.6			2.5			—
Income tax adjustments		1.3			(3.3	)		6.9
Adjusted Earnings	$	247.4		$	228.1		$	216.3