Revenue (Tables)

12 Months Ended

Sep. 30, 2020

Revenue From Contract With Customer [Abstract]

Schedule of Revenue Disaggregated by Source and Customer Type

The following tables show revenue disaggregated by source and customer type.

	2020			2019
Spire
Gas Utility:
Residential	$	1,184.3		$	1,267.3
Commercial & industrial		383.0			433.9
Transportation		115.8			112.1
Off-system & other incentive		38.4			41.9
Other customer revenue		26.2			22.5
Total revenue from contracts with customers		1,747.7			1,877.7
Changes in accrued revenue under alternative revenue programs		4.3			(16.9	)
Total Gas Utility operating revenues		1,752.0			1,860.8
Gas Marketing:
Revenue from contracts with retail customers		87.9			83.7
Revenue from wholesale derivative contracts		—			—
Total Gas Marketing operating revenues		87.9			83.7
Other		57.8			21.5
Total before eliminations		1,897.7			1,966.0
Intersegment eliminations (see Note 14, Information by Operating Segment)		(42.3	)		(13.6	)
Total Operating Revenues	$	1,855.4		$	1,952.4
Spire Missouri
Residential	$	859.6		$	945.9
Commercial & industrial		241.4			283.8
Transportation		32.9			33.1
Off-system & other incentive		35.1			41.9
Other customer revenue		22.3			—
Total revenue from contracts with customers		1,191.3			1,304.7
Changes in accrued revenue under alternative revenue programs		2.3			(12.9	)
Total Operating Revenues	$	1,193.6		$	1,291.8
Spire Alabama
Residential	$	267.8		$	265.3
Commercial & industrial		109.4			113.5
Transportation		72.9			69.5
Off-system & other incentive		3.2			—
Other customer revenue		1.9			20.7
Total revenue from contracts with customers		455.2			469.0
Changes in accrued revenue under alternative revenue programs		(0.2	)		(3.5	)
Total Operating Revenues	$	455.0		$	465.5

Schedule of Gross Receipts Taxes

The expense amounts (shown in the table below) are reported gross in the “Taxes, other than income taxes” line in the statements of income, and corresponding revenues are reported in “Operating Revenues.”

	2020		2019		2018
Spire	$	91.5	$	99.3	$	98.4
Spire Missouri		63.5		71.1		68.9
Spire Alabama		23.3		23.7		25.4