Information by Operating Segment (Tables)

6 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Schedule of Operating Segment Information

	Gas Utility			Gas Marketing			Other			Eliminations			Consolidated
Three Months Ended March 31, 2020
Operating Revenues:
Revenues from external customers	$	679.1		$	33.3		$	3.1		$	—		$	715.5
Intersegment revenues		(0.1	)		—			11.6			(11.5	)		—
Total Operating Revenues		679.0			33.3			14.7			(11.5	)		715.5
Operating Expenses:
Gas Utility
Natural and propane gas		271.6			—			—			(22.6	)		249.0
Operation and maintenance		95.8			—			—			(2.7	)		93.1
Depreciation and amortization		47.0			—			—			—			47.0
Taxes, other than income taxes		51.7			—			—			—			51.7
Total Gas Utility Operating Expenses		466.1			—			—			(25.3	)		440.8
Gas Marketing and Other		—			37.7			12.7			13.8			64.2
Total Operating Expenses		466.1			37.7			12.7			(11.5	)		505.0
Operating Income	$	212.9		$	(4.4	)	$	2.0		$	—		$	210.5
Net Economic Earnings (Loss)	$	144.3		$	5.1		$	(5.4	)	$	—		$	144.0

	Gas Utility		Gas Marketing		Other			Eliminations			Consolidated
Three Months Ended March 31, 2019
Operating Revenues:
Revenues from external customers	$	776.7	$	25.4	$	1.4		$	—		$	803.5
Intersegment revenues		0.1		0.1		2.9			(3.1	)		—
Total Operating Revenues		776.8		25.5		4.3			(3.1	)		803.5
Operating Expenses:
Gas Utility
Natural and propane gas		366.7		—		—			(29.3	)		337.4
Operation and maintenance		112.0		—		—			(2.5	)		109.5
Depreciation and amortization		44.4		—		—			—			44.4
Taxes, other than income taxes		57.4		—		—			—			57.4
Total Gas Utility Operating Expenses		580.5		—		—			(31.8	)		548.7
Gas Marketing and Other		—		8.7		7.9			28.7			45.3
Total Operating Expenses		580.5		8.7		7.9			(3.1	)		594.0
Operating Income (Loss)	$	196.3	$	16.8	$	(3.6	)	$	—		$	209.5
Net Economic Earnings (Loss)	$	146.7	$	6.2	$	(5.0	)	$	—		$	147.9

	Gas Utility		Gas Marketing		Other			Eliminations			Consolidated
Six Months Ended March 31, 2020
Operating Revenues:
Revenues from external customers	$	1,209.7	$	65.6	$	7.1		$	—		$	1,282.4
Intersegment revenues		—		—		18.7			(18.7	)		—
Total Operating Revenues		1,209.7		65.6		25.8			(18.7	)		1,282.4
Operating Expenses:
Gas Utility
Natural and propane gas		513.1		—		—			(49.5	)		463.6
Operation and maintenance		204.4		—		—			(5.3	)		199.1
Depreciation and amortization		93.4		—		—			—			93.4
Taxes, other than income taxes		89.6		—		—			—			89.6
Total Gas Utility Operating Expenses		900.5		—		—			(54.8	)		845.7
Gas Marketing and Other		—		65.6		22.2			36.1			123.9
Total Operating Expenses		900.5		65.6		22.2			(18.7	)		969.6
Operating Income (Loss)	$	309.2	$	—	$	3.6		$	—		$	312.8
Net Economic Earnings (Loss)	$	213.4	$	11.2	$	(8.8	)	$	—		$	215.8
	Gas Utility		Gas Marketing		Other			Eliminations			Consolidated
Six Months Ended March 31, 2019
Operating Revenues:
Revenues from external customers	$	1,350.5	$	51.2	$	3.8		$	—		$	1,405.5
Intersegment revenues		1.5		0.1		5.9			(7.5	)		—
Total Operating Revenues		1,352.0		51.3		9.7			(7.5	)		1,405.5
Operating Expenses:
Gas Utility
Natural and propane gas		658.5		—		—			(69.4	)		589.1
Operation and maintenance		216.9		—		—			(4.9	)		212.0
Depreciation and amortization		88.1		—		—			—			88.1
Taxes, other than income taxes		96.6		—		—			—			96.6
Total Gas Utility Operating Expenses		1,060.1		—		—			(74.3	)		985.8
Gas Marketing and Other		—		22.0		16.3			66.8			105.1
Total Operating Expenses		1,060.1		22.0		16.3			(7.5	)		1,090.9
Operating Income (Loss)	$	291.9	$	29.3	$	(6.6	)	$	—		$	314.6
Net Economic Earnings (Loss)	$	213.1	$	14.5	$	(13.8	)	$	—		$	213.8

The Company’s total assets by segment were as follows:

	March 31,			September 30,			March 31,
	2020			2019			2019
Total Assets:
Gas Utility	$	6,311.6		$	6,094.6		$	5,850.1
Gas Marketing		159.3			212.3			366.7
Other		2,214.7			2,692.7			2,396.8
Eliminations		(667.6	)		(1,380.4	)		(1,340.0	)
Total Assets	$	8,018.0		$	7,619.2		$	7,273.6

Schedule of Reconciliation of Consolidated Net Economic Earnings to Consolidated Net Income

The following table reconciles the Company’s net economic earnings to net income.

	Three Months Ended March 31,						Six Months Ended March 31,
	2020			2019			2020			2019
Net Income	$	133.6		$	154.6		$	200.6		$	221.9
Adjustments, pre-tax:
Provision for ISRS rulings		2.2			—			4.8			—
Unrealized loss (gain) on energy-related derivatives		11.6			(9.1	)		15.3			(11.3	)
Acquisition, divestiture and restructuring activities		—			—			—			0.4
Income tax effect of adjustments		(3.4	)		2.4			(4.9	)		2.8
Net Economic Earnings	$	144.0		$	147.9		$	215.8		$	213.8