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Note 2 - Revenue (Tables)
12 Months Ended
Sep. 30, 2023
Notes Tables  
Disaggregation of Revenue [Table Text Block]
   

2023

   

2022

   

2021

 

Spire

                       

Gas Utility:

                       

Residential

  $ 1,648.5     $ 1,416.6     $ 1,234.0  

Commercial & industrial

    606.0       338.9       586.0  

Transportation

    121.6       118.0       122.9  

Off-system & other incentive

    30.0       42.0       152.7  

Other customer revenue

    16.1       19.9       22.2  

Total revenue from contracts with customers

    2,422.2       1,935.4       2,117.8  

Changes in accrued revenue under alternative revenue programs

    34.7       10.7       1.5  

Total Gas Utility operating revenues

    2,456.9       1,946.1       2,119.3  

Gas Marketing

    179.1       234.9       96.5  

Midstream

    66.1       53.1       52.6  

Other

    16.7       16.1       15.1  

Total before eliminations

    2,718.8       2,250.2       2,283.5  

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

    (52.5 )     (51.7 )     (48.0 )

Total Operating Revenues

  $ 2,666.3     $ 2,198.5     $ 2,235.5  

Spire Missouri

                       

Residential

  $ 1,261.3     $ 1,061.4     $ 882.1  

Commercial & industrial

    411.9       177.2       436.1  

Transportation

    33.2       33.3       33.5  

Off-system & other incentive

    20.1       25.2       145.6  

Other customer revenue

    12.5       11.1       16.3  

Total revenue from contracts with customers

    1,739.0       1,308.2       1,513.6  

Changes in accrued revenue under alternative revenue programs

    23.9       12.8       3.0  

Total Operating Revenues

  $ 1,762.9     $ 1,321.0     $ 1,516.6  

Spire Alabama

                       

Residential

  $ 322.9     $ 291.6     $ 288.0  

Commercial & industrial

    150.4       119.1       114.9  

Transportation

    77.6       74.4       78.7  

Off-system & other incentive

    9.9       16.8       7.1  

Other customer revenue

    3.6       5.5       1.9  

Total revenue from contracts with customers

    564.4       507.4       490.6  

Changes in accrued revenue under alternative revenue programs

    6.7       1.7       3.4  

Total Operating Revenues

  $ 571.1     $ 509.1     $ 494.0  
Schedule Of Taxes On Revenues [Table Text Block]
   

2023

   

2022

   

2021

 

Spire

  $ 131.8     $ 109.8     $ 94.0  

Spire Missouri

    96.7       79.6       64.3  

Spire Alabama

    29.9       25.5       25.1