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Note 2 - Revenue (Tables)
12 Months Ended
Sep. 30, 2022
Notes Tables  
Disaggregation of Revenue [Table Text Block]
  

2022

  

2021

  

2020

 

Spire

            

Gas Utility:

            

Residential

 $1,416.6  $1,234.0  $1,184.3 

Commercial & industrial

  338.9   586.0   383.0 

Transportation

  118.0   122.9   115.8 

Off-system & other incentive

  42.0   152.7   38.4 

Other customer revenue

  19.9   22.2   26.2 

Total revenue from contracts with customers

  1,935.4   2,117.8   1,747.7 

Changes in accrued revenue under alternative revenue programs

  10.7   1.5   4.3 

Total Gas Utility operating revenues

  1,946.1   2,119.3   1,752.0 

Gas Marketing

  234.9   96.5   87.9 

Other

  69.2   67.7   57.8 

Total before eliminations

  2,250.2   2,283.5   1,897.7 

Intersegment eliminations (see Note 14, Information by Operating Segment)

  (51.7)  (48.0)  (42.3)

Total Operating Revenues

 $2,198.5  $2,235.5  $1,855.4 

Spire Missouri

            

Residential

 $1,061.4  $882.1  $859.6 

Commercial & industrial

  177.2   436.1   241.4 

Transportation

  33.3   33.5   32.9 

Off-system & other incentive

  25.2   145.6   35.1 

Other customer revenue

  11.1   16.3   22.3 

Total revenue from contracts with customers

  1,308.2   1,513.6   1,191.3 

Changes in accrued revenue under alternative revenue programs

  12.8   3.0   2.3 

Total Operating Revenues

 $1,321.0  $1,516.6  $1,193.6 

Spire Alabama

            

Residential

 $291.6  $288.0  $267.8 

Commercial & industrial

  119.1   114.9   109.4 

Transportation

  74.4   78.7   72.9 

Off-system & other incentive

  16.8   7.1   3.2 

Other customer revenue

  5.5   1.9   1.9 

Total revenue from contracts with customers

  507.4   490.6   455.2 

Changes in accrued revenue under alternative revenue programs

  1.7   3.4   (0.2)

Total Operating Revenues

 $509.1  $494.0  $455.0 
Schedule Of Taxes On Revenues [Table Text Block]
  

2022

  

2021

  

2020

 

Spire

 $109.8  $94.0  $91.5 

Spire Missouri

  79.6   64.3   63.5 

Spire Alabama

  25.5   25.1   23.3