XML 63 R43.htm IDEA: XBRL DOCUMENT
v3.25.3

Pension Plans and Other Postretirement Benefits (Tables) | 12 Months Ended
--- | ---
Sep. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs |
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2023 |  |  | 2025 |  |  | 2024 |  |  | 2023 |  |  | 2025 |  |  | 2024 |  |  | 2023 |
Service cost – benefits earned during the period |  | $ | 17.6 |  |  | $ | 15.7 |  |  | $ | 16.3 |  |  | $ | 11.4 |  |  | $ | 10.4 |  |  | $ | 11.4 |  |  | $ | 5.5 |  |  | $ | 4.6 |  |  | $ | 4.2 |
Interest cost on projected benefit obligation |  |  | 23.5 |  |  |  | 26.7 |  |  |  | 25.1 |  |  |  | 15.8 |  |  |  | 18.9 |  |  |  | 17.8 |  |  |  | 5.1 |  |  |  | 5.1 |  |  |  | 4.8 |
Expected return on plan assets |  |  | (25.9 | ) |  |  | (24.8 | ) |  |  | (24.5 | ) |  |  | (17.6 | ) |  |  | (17.0 | ) |  |  | (18.0 | ) |  |  | (5.3 | ) |  |  | (4.8 | ) |  |  | (3.5 | )
Amortization of prior service credit |  |  | (4.5 | ) |  |  | (4.5 | ) |  |  | (4.5 | ) |  |  | (1.9 | ) |  |  | (1.9 | ) |  |  | (1.9 | ) |  |  | (2.4 | ) |  |  | (2.4 | ) |  |  | (2.4 | )
Amortization of actuarial loss |  |  | 6.5 |  |  |  | 6.4 |  |  |  | 6.6 |  |  |  | 4.1 |  |  |  | 5.9 |  |  |  | 6.1 |  |  |  | 2.4 |  |  |  | 1.0 |  |  |  | 0.9 |
Special termination benefits |  |  | — |  |  |  | 2.6 |  |  |  | — |  |  |  | — |  |  |  | 2.6 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Loss on lump-sum settlements and curtailments |  |  | 0.4 |  |  |  | 12.9 |  |  |  | 9.7 |  |  |  | 0.4 |  |  |  | 12.9 |  |  |  | 0.6 |  |  |  | — |  |  |  | — |  |  |  | 9.1 |
Subtotal |  |  | 17.6 |  |  |  | 35.0 |  |  |  | 28.7 |  |  |  | 12.2 |  |  |  | 31.8 |  |  |  | 16.0 |  |  |  | 5.3 |  |  |  | 3.5 |  |  |  | 13.1 |
Regulatory adjustment |  |  | 36.3 |  |  |  | 18.4 |  |  |  | 26.3 |  |  |  | 29.6 |  |  |  | 10.8 |  |  |  | 27.1 |  |  |  | 5.8 |  |  |  | 6.7 |  |  |  | (1.7 | )
Net pension cost |  | $ | 53.9 |  |  | $ | 53.4 |  |  | $ | 55.0 |  |  | $ | 41.8 |  |  | $ | 42.6 |  |  | $ | 43.1 |  |  | $ | 11.1 |  |  | $ | 10.2 |  |  | $ | 11.4 |
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2023 |  |  | 2025 |  |  | 2024 |  |  | 2023 |  |  | 2025 |  |  | 2024 |  |  | 2023 |
Service cost – benefits earned during the period |  | $ | 4.2 |  |  | $ | 4.3 |  |  | $ | 4.8 |  |  | $ | 3.5 |  |  | $ | 3.5 |  |  | $ | 4.0 |  |  | $ | 0.7 |  |  | $ | 0.7 |  |  | $ | 0.7 |
Interest cost on accumulated postretirement benefit obligation |  |  | 7.3 |  |  |  | 8.9 |  |  |  | 8.5 |  |  |  | 5.2 |  |  |  | 6.6 |  |  |  | 6.5 |  |  |  | 2.0 |  |  |  | 2.1 |  |  |  | 1.8 |
Expected return on plan assets |  |  | (16.9 | ) |  |  | (16.0 | ) |  |  | (15.8 | ) |  |  | (11.1 | ) |  |  | (10.6 | ) |  |  | (10.5 | ) |  |  | (5.4 | ) |  |  | (5.1 | ) |  |  | (5.0 | )
Amortization of prior service cost (credit) |  |  | 0.2 |  |  |  | 0.3 |  |  |  | 0.3 |  |  |  | 0.3 |  |  |  | 0.6 |  |  |  | 0.6 |  |  |  | (0.1 | ) |  |  | (0.3 | ) |  |  | (0.3 | )
Amortization of actuarial gain |  |  | (5.8 | ) |  |  | (5.8 | ) |  |  | (4.0 | ) |  |  | (5.1 | ) |  |  | (5.2 | ) |  |  | (3.2 | ) |  |  | (0.1 | ) |  |  | (0.1 | ) |  |  | (0.5 | )
Special termination benefits |  |  | — |  |  |  | 6.1 |  |  |  | — |  |  |  | — |  |  |  | 6.1 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Subtotal |  |  | (11.0 | ) |  |  | (2.2 | ) |  |  | (6.2 | ) |  |  | (7.2 | ) |  |  | 1.0 |  |  |  | (2.6 | ) |  |  | (2.9 | ) |  |  | (2.7 | ) |  |  | (3.3 | )
Regulatory adjustment |  |  | 4.5 |  |  |  | (3.6 | ) |  |  | 0.6 |  |  |  | 6.2 |  |  |  | (1.9 | ) |  |  | 1.8 |  |  |  | (1.8 | ) |  |  | (1.8 | ) |  |  | (1.3 | )
Net postretirement benefit income |  | $ | (6.5 | ) |  | $ | (5.8 | ) |  | $ | (5.6 | ) |  | $ | (1.0 | ) |  | $ | (0.9 | ) |  | $ | (0.8 | ) |  | $ | (4.7 | ) |  | $ | (4.5 | ) |  | $ | (4.6 | )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) |
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2023 |  |  | 2025 |  |  | 2024 |  |  | 2023 |  |  | 2025 |  |  | 2024 |  |  | 2023 |
Current year actuarial (gain) loss |  | $ | (11.9 | ) |  | $ | 8.8 |  |  | $ | 14.5 |  |  | $ | (9.9 | ) |  | $ | (0.9 | ) |  | $ | 5.7 |  |  | $ | (0.8 | ) |  | $ | 8.5 |  |  | $ | 9.0 |
Amortization of actuarial loss |  |  | (6.5 | ) |  |  | (6.4 | ) |  |  | (6.6 | ) |  |  | (4.1 | ) |  |  | (5.9 | ) |  |  | (6.1 | ) |  |  | (2.4 | ) |  |  | (1.0 | ) |  |  | (0.9 | )
Acceleration of loss recognized due to settlement |  |  | (0.4 | ) |  |  | (12.9 | ) |  |  | (9.7 | ) |  |  | (0.4 | ) |  |  | (12.9 | ) |  |  | (0.6 | ) |  |  | — |  |  |  | — |  |  |  | (9.1 | )
Current year service credit |  |  | — |  |  |  | 0.2 |  |  |  | — |  |  |  | — |  |  |  | 0.2 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of prior service credit |  |  | 4.5 |  |  |  | 4.5 |  |  |  | 4.5 |  |  |  | 1.9 |  |  |  | 1.9 |  |  |  | 1.9 |  |  |  | 2.4 |  |  |  | 2.4 |  |  |  | 2.4 |
Subtotal |  |  | (14.3 | ) |  |  | (5.8 | ) |  |  | 2.7 |  |  |  | (12.5 | ) |  |  | (17.6 | ) |  |  | 0.9 |  |  |  | (0.8 | ) |  |  | 9.9 |  |  |  | 1.4 |
Regulatory adjustment |  |  | 13.0 |  |  |  | 5.2 |  |  |  | (2.8 | ) |  |  | 11.2 |  |  |  | 17.0 |  |  |  | (1.0 | ) |  |  | 0.8 |  |  |  | (9.9 | ) |  |  | (1.4 | )
Total recognized in OCI |  | $ | (1.3 | ) |  | $ | (0.6 | ) |  | $ | (0.1 | ) |  | $ | (1.3 | ) |  | $ | (0.6 | ) |  | $ | (0.1 | ) |  | $ | — |  |  | $ | — |  |  | $ | — |
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2023 |  |  | 2025 |  |  | 2024 |  |  | 2023 |  |  | 2025 |  |  | 2024 |  |  | 2023 |
Current year actuarial (gain) loss |  | $ | (36.5 | ) |  | $ | (52.4 | ) |  | $ | (24.4 | ) |  | $ | (31.9 | ) |  | $ | (40.4 | ) |  | $ | (21.5 | ) |  | $ | (4.0 | ) |  | $ | (9.3 | ) |  | $ | (1.1 | )
Amortization of actuarial gain |  |  | 5.8 |  |  |  | 5.8 |  |  |  | 4.0 |  |  |  | 5.1 |  |  |  | 5.2 |  |  |  | 3.2 |  |  |  | 0.1 |  |  |  | 0.1 |  |  |  | 0.5 |
Current year prior service cost |  |  | — |  |  |  | (4.7 | ) |  |  | — |  |  |  | — |  |  |  | (4.7 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of prior service (cost) credit |  |  | (0.2 | ) |  |  | (0.3 | ) |  |  | (0.3 | ) |  |  | (0.3 | ) |  |  | (0.6 | ) |  |  | (0.6 | ) |  |  | 0.1 |  |  |  | 0.3 |  |  |  | 0.3 |
Subtotal |  |  | (30.9 | ) |  |  | (51.6 | ) |  |  | (20.7 | ) |  |  | (27.1 | ) |  |  | (40.5 | ) |  |  | (18.9 | ) |  |  | (3.8 | ) |  |  | (8.9 | ) |  |  | (0.3 | )
Regulatory adjustment |  |  | 30.9 |  |  |  | 51.6 |  |  |  | 20.7 |  |  |  | 27.1 |  |  |  | 40.5 |  |  |  | 18.9 |  |  |  | 3.8 |  |  |  | 8.9 |  |  |  | 0.3 |
Total recognized in OCI |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Schedule of Accumulated and Projected Benefit Obligations |
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Benefit obligation, beginning of year |  | $ | 469.7 |  |  | $ | 438.7 |  |  | $ | 319.7 |  |  | $ | 313.2 |  |  | $ | 97.9 |  |  | $ | 80.6 |
Service cost |  |  | 17.6 |  |  |  | 15.7 |  |  |  | 11.4 |  |  |  | 10.4 |  |  |  | 5.5 |  |  |  | 4.6 |
Interest cost |  |  | 23.5 |  |  |  | 26.7 |  |  |  | 15.8 |  |  |  | 18.9 |  |  |  | 5.1 |  |  |  | 5.1 |
Actuarial loss (gain) |  |  | (15.3 | ) |  |  | 46.0 |  |  |  | (8.5 | ) |  |  | 25.2 |  |  |  | (4.3 | ) |  |  | 14.3 |
Plan amendments |  |  | — |  |  |  | 0.2 |  |  |  | — |  |  |  | 0.2 |  |  |  | — |  |  |  | — |
Special termination benefits |  |  | — |  |  |  | 2.6 |  |  |  | — |  |  |  | 2.6 |  |  |  | — |  |  |  | — |
Settlement benefits paid |  |  | (1.5 | ) |  |  | (37.3 | ) |  |  | (1.5 | ) |  |  | (37.3 | ) |  |  | — |  |  |  | — |
Regular benefits paid |  |  | (43.8 | ) |  |  | (22.9 | ) |  |  | (29.7 | ) |  |  | (13.5 | ) |  |  | (11.2 | ) |  |  | (6.7 | )
Benefit obligation, end of year |  | $ | 450.2 |  |  | $ | 469.7 |  |  | $ | 307.2 |  |  | $ | 319.7 |  |  | $ | 93.0 |  |  | $ | 97.9 |
Accumulated benefit obligation, end of year |  | $ | 439.6 |  |  | $ | 459.4 |  |  | $ | 302.8 |  |  | $ | 314.7 |  |  | $ | 87.3 |  |  | $ | 92.9 |
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Benefit obligation, beginning of year |  | $ | 142.5 |  |  | $ | 142.6 |  |  | $ | 102.4 |  |  | $ | 105.3 |  |  | $ | 39.0 |  |  | $ | 35.1 |
Service cost |  |  | 4.2 |  |  |  | 4.3 |  |  |  | 3.5 |  |  |  | 3.5 |  |  |  | 0.7 |  |  |  | 0.7 |
Interest cost |  |  | 7.3 |  |  |  | 8.9 |  |  |  | 5.2 |  |  |  | 6.6 |  |  |  | 2.0 |  |  |  | 2.1 |
Actuarial (gain) loss |  |  | (18.4 | ) |  |  | (1.5 | ) |  |  | (17.1 | ) |  |  | (3.2 | ) |  |  | (1.2 | ) |  |  | 3.1 |
Plan amendments |  |  | — |  |  |  | (4.7 | ) |  |  | — |  |  |  | (4.7 | ) |  |  | — |  |  |  | — |
Retiree drug subsidy program |  |  | — |  |  |  | 0.2 |  |  |  | — |  |  |  | 0.2 |  |  |  | — |  |  |  | — |
Special termination benefits |  |  | — |  |  |  | 6.1 |  |  |  | — |  |  |  | 6.1 |  |  |  | — |  |  |  | — |
Benefits paid |  |  | (4.1 | ) |  |  | (13.4 | ) |  |  | (1.9 | ) |  |  | (11.4 | ) |  |  | (2.2 | ) |  |  | (2.0 | )
Benefit obligation, end of year |  | $ | 131.5 |  |  | $ | 142.5 |  |  | $ | 92.1 |  |  | $ | 102.4 |  |  | $ | 38.3 |  |  | $ | 39.0 |
Schedule of Changes in Fair Value of Plan Assets |
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Fair value of plan assets, beginning of year |  | $ | 374.8 |  |  | $ | 334.7 |  |  | $ | 259.8 |  |  | $ | 242.0 |  |  | $ | 69.9 |  |  | $ | 53.6 |
Actual return on plan assets |  |  | 22.4 |  |  |  | 61.8 |  |  |  | 19.0 |  |  |  | 43.2 |  |  |  | 1.8 |  |  |  | 10.4 |
Employer contributions |  |  | 75.8 |  |  |  | 38.5 |  |  |  | 37.2 |  |  |  | 25.4 |  |  |  | 30.1 |  |  |  | 12.6 |
Settlement benefits paid |  |  | (1.5 | ) |  |  | (37.3 | ) |  |  | (1.5 | ) |  |  | (37.3 | ) |  |  | — |  |  |  | — |
Regular benefits paid |  |  | (43.8 | ) |  |  | (22.9 | ) |  |  | (29.7 | ) |  |  | (13.5 | ) |  |  | (11.2 | ) |  |  | (6.7 | )
Fair value of plan assets, end of year |  | $ | 427.7 |  |  | $ | 374.8 |  |  | $ | 284.8 |  |  | $ | 259.8 |  |  | $ | 90.6 |  |  | $ | 69.9 |
Funded status of plans, end of year |  | $ | (22.5 | ) |  | $ | (94.9 | ) |  | $ | (22.4 | ) |  | $ | (59.9 | ) |  | $ | (2.4 | ) |  | $ | (28.0 | )
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Fair value of plan assets at beginning of year |  | $ | 339.4 |  |  | $ | 286.3 |  |  | $ | 224.9 |  |  | $ | 188.8 |  |  | $ | 107.5 |  |  | $ | 92.0 |
Actual return on plan assets |  |  | 34.9 |  |  |  | 66.3 |  |  |  | 25.7 |  |  |  | 47.3 |  |  |  | 8.2 |  |  |  | 17.5 |
Employer contributions |  |  | 2.7 |  |  |  | 0.2 |  |  |  | 2.7 |  |  |  | 0.2 |  |  |  | — |  |  |  | — |
Benefits paid |  |  | (4.1 | ) |  |  | (13.4 | ) |  |  | (1.9 | ) |  |  | (11.4 | ) |  |  | (2.2 | ) |  |  | (2.0 | )
Fair value of plan assets, end of year |  | $ | 372.9 |  |  | $ | 339.4 |  |  | $ | 251.4 |  |  | $ | 224.9 |  |  | $ | 113.5 |  |  | $ | 107.5 |
Funded status of plans, end of year |  | $ | 241.4 |  |  | $ | 196.9 |  |  | $ | 159.3 |  |  | $ | 122.5 |  |  | $ | 75.2 |  |  | $ | 68.5 |
Schedule of Amounts Recognized in Balance Sheet |
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Noncurrent assets |  | $ | 6.2 |  |  | $ | — |  |  | $ | 3.9 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Current liabilities |  |  | (0.6 | ) |  |  | (1.0 | ) |  |  | (0.6 | ) |  |  | (1.0 | ) |  |  | — |  |  |  | — |
Noncurrent liabilities |  |  | (28.1 | ) |  |  | (93.9 | ) |  |  | (25.7 | ) |  |  | (58.9 | ) |  |  | (2.4 | ) |  |  | (28.0 | )
Total |  | $ | (22.5 | ) |  | $ | (94.9 | ) |  | $ | (22.4 | ) |  | $ | (59.9 | ) |  | $ | (2.4 | ) |  | $ | (28.0 | )
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Noncurrent assets |  | $ | 288.2 |  |  | $ | 248.3 |  |  | $ | 206.1 |  |  | $ | 173.9 |  |  | $ | 75.2 |  |  | $ | 68.5 |
Current liabilities |  |  | (0.4 | ) |  |  | (0.4 | ) |  |  | (0.4 | ) |  |  | (0.4 | ) |  |  | — |  |  |  | — |
Noncurrent liabilities |  |  | (46.4 | ) |  |  | (51.0 | ) |  |  | (46.4 | ) |  |  | (51.0 | ) |  |  | — |  |  |  | — |
Total |  | $ | 241.4 |  |  | $ | 196.9 |  |  | $ | 159.3 |  |  | $ | 122.5 |  |  | $ | 75.2 |  |  | $ | 68.5 |
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year |
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Net actuarial loss |  | $ | 100.9 |  |  | $ | 119.7 |  |  | $ | 58.5 |  |  | $ | 72.9 |  |  | $ | 44.5 |  |  | $ | 47.7 |
Prior service credit |  |  | (22.0 | ) |  |  | (26.4 | ) |  |  | (12.1 | ) |  |  | (14.0 | ) |  |  | (9.1 | ) |  |  | (11.5 | )
Subtotal |  |  | 78.9 |  |  |  | 93.3 |  |  |  | 46.4 |  |  |  | 58.9 |  |  |  | 35.4 |  |  |  | 36.2 |
Adjustments for amounts included in regulatory assets |  |  | (77.8 | ) |  |  | (90.8 | ) |  |  | (45.3 | ) |  |  | (56.4 | ) |  |  | (35.4 | ) |  |  | (36.2 | )
Total |  | $ | 1.1 |  |  | $ | 2.5 |  |  | $ | 1.1 |  |  | $ | 2.5 |  |  | $ | — |  |  | $ | — |
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Net actuarial gain |  | $ | (180.6 | ) |  | $ | (150.0 | ) |  | $ | (154.2 | ) |  | $ | (127.5 | ) |  | $ | (19.3 | ) |  | $ | (15.4 | )
Prior service cost (credit) |  |  | 2.0 |  |  |  | 2.0 |  |  |  | 2.0 |  |  |  | 2.1 |  |  |  | — |  |  |  | (0.1 | )
Subtotal |  |  | (178.6 | ) |  |  | (148.0 | ) |  |  | (152.2 | ) |  |  | (125.4 | ) |  |  | (19.3 | ) |  |  | (15.5 | )
Adjustments for amounts included in regulatory assets |  |  | 178.6 |  |  |  | 148.0 |  |  |  | 152.2 |  |  |  | 125.4 |  |  |  | 19.3 |  |  |  | 15.5 |
Total |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Defined Benefit Plan, Assumptions |
|  | 2025 |  | 2024 |  | 2023
Weighted average discount rate - Spire Missouri East plan |  | 5.10% |  | 6.25% |  | 5.70%
Weighted average discount rate - Spire Missouri West plan |  | 5.05% |  | 6.30% |  | 5.80%
Weighted average rate of future compensation increase |  | 3.50% |  | 3.00% |  | 3.00%
Expected long-term rate of return on plan assets |  | 6.50% |  | 6.50% |  | 6.50%
|  | 2025 |  | 2024 |  | 2023
Weighted average discount rate |  | 5.10% |  | 6.20%/6.25% |  | 5.65%/5.70%
Weighted average rate of future compensation increase |  | 3.50% |  | 3.00% |  | 3.00%
Expected long-term rate of return on plan assets |  | 6.75% |  | 6.75% |  | 6.50%
|  | 2025 |  | 2024
Weighted average discount rate - Spire Missouri East plan |  | 5.55% |  | 5.10%
Weighted average discount rate - Spire Missouri West plan |  | 5.45% |  | 5.05%
Weighted average discount rate - Spire Alabama plans |  | 5.55% |  | 5.10%
Weighted average rate of future compensation increase (all plans) |  | 3.50% |  | 3.50%
Cash balance interest crediting rate - Spire Alabama / Spire Missouri |  | 4.25% |  | 4.25%
|  | 2025 |  | 2024 |  | 2023
Weighted average discount rate – Spire Missouri plans |  | 5.05% |  | 6.30% |  | 5.80%
Expected long-term rate of return on plan assets – Spire Missouri plans |  | 5.50% |  | 5.50% |  | 5.50%
|  | 2025 |  | 2024 |  | 2023
Weighted average discount rate |  | 5.05% |  | 6.30% |  | 5.80%
Expected long-term rate of return on plan assets |  | 4.75%/6.00% |  | 4.75%/6.00% |  | 4.75%/6.00%
Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets |
|  | Spire |  |  | Spire Missouri |  |  | Spire Alabama |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Projected benefit obligation |  | $ | 450.2 |  |  | $ | 469.7 |  |  | $ | 307.2 |  |  | $ | 319.7 |  |  | $ | 93.0 |  |  | $ | 97.9 |
Accumulated benefit obligation |  |  | 439.6 |  |  |  | 459.4 |  |  |  | 302.8 |  |  |  | 314.7 |  |  |  | 87.3 |  |  |  | 92.9 |
Fair value of plan assets |  |  | 427.7 |  |  |  | 374.8 |  |  |  | 284.8 |  |  |  | 259.8 |  |  |  | 90.6 |  |  |  | 69.9 |
Schedule of Allocation of Plan Assets |
Spire Missouri |  | 2025 Target |  |  | 2025 Actual |  |  | 2024 Target |  |  | 2024 Actual |
Return seeking assets |  |  | 70.0 | % |  |  | 56.6 | % |  |  | 70.0 | % |  |  | 71.3 | %
Liability hedging assets |  |  | 30.0 | % |  |  | 40.4 | % |  |  | 30.0 | % |  |  | 24.3 | %
Cash and cash equivalents |  |  | — | % |  |  | 3.0 | % |  |  | — | % |  |  | 4.4 | %
Total |  |  | 100.0 | % |  |  | 100.0 | % |  |  | 100.0 | % |  |  | 100.0 | %
Spire Alabama |  | 2025 Target |  |  | 2025 Actual |  |  | 2024 Target |  |  | 2024 Actual |
Return seeking assets |  |  | 75.0 | % |  |  | 72.0 | % |  |  | 75.0 | % |  |  | 74.9 | %
Liability hedging assets |  |  | 25.0 | % |  |  | 16.8 | % |  |  | 25.0 | % |  |  | 22.6 | %
Cash and cash equivalents |  |  | — | % |  |  | 11.2 | % |  |  | — | % |  |  | 2.5 | %
Total |  |  | 100.0 | % |  |  | 100.0 | % |  |  | 100.0 | % |  |  | 100.0 | %
Spire Missouri |  | Target |  |  | 2025 Actual |  |  | 2024 Actual |
Equity securities |  |  | 60.0 | % |  |  | 58.6 | % |  |  | 60.8 | %
Debt securities |  |  | 40.0 | % |  |  | 36.0 | % |  |  | 38.2 | %
Cash and cash equivalents |  |  | — | % |  |  | 5.4 | % |  |  | 1.0 | %
Total |  |  | 100.0 | % |  |  | 100.0 | % |  |  | 100.0 | %
Spire Alabama |  | Target |  |  | 2025 Actual |  |  | 2024 Actual |
Equity securities |  |  | 60.5 | % |  |  | 60.9 | % |  |  | 60.7 | %
Debt securities |  |  | 39.5 | % |  |  | 39.1 | % |  |  | 39.3 | %
Total |  |  | 100.0 | % |  |  | 100.0 | % |  |  | 100.0 | %
Schedule of Expected Benefit Payments |
|  | 2026 |  |  | 2027 |  |  | 2028 |  |  | 2029 |  |  | 2030 |  |  | 2031 – 2035 |
Spire |  | $ | 51.2 |  |  | $ | 46.0 |  |  | $ | 45.3 |  |  | $ | 42.9 |  |  | $ | 41.7 |  |  | $ | 196.2 |
Spire Missouri |  |  | 38.5 |  |  |  | 33.4 |  |  |  | 32.6 |  |  |  | 30.5 |  |  |  | 29.1 |  |  |  | 133.5 |
Spire Alabama |  |  | 8.8 |  |  |  | 8.8 |  |  |  | 8.5 |  |  |  | 8.4 |  |  |  | 8.5 |  |  |  | 42.8 |
|  | 2026 |  |  | 2027 |  |  | 2028 |  |  | 2029 |  |  | 2030 |  |  | 2031 – 2035 |
Spire |  | $ | 13.4 |  |  | $ | 13.0 |  |  | $ | 12.5 |  |  | $ | 12.0 |  |  | $ | 11.6 |  |  | $ | 54.0 |
Spire Missouri |  |  | 10.1 |  |  |  | 9.7 |  |  |  | 9.3 |  |  |  | 8.9 |  |  |  | 8.5 |  |  |  | 38.3 |
Spire Alabama |  |  | 3.2 |  |  |  | 3.2 |  |  |  | 3.1 |  |  |  | 3.0 |  |  |  | 3.0 |  |  |  | 15.2 |
Schedule of Health Care Cost Trend Rates |
|  | 2025 |  | 2024
Medical cost trend assumed for next year – Spire Alabama and Spire Missouri |  | 7.00% |  | 6.50%
Rate to which the medical cost trend rate is assumed to decline (the ultimate medical cost trend rate) |  | 5.00% |  | 5.00%
Year the rate reaches the ultimate trend |  | 2034 |  | 2031
Fair Value, Assets Measured on Recurring Basis |
|  | As of September 30, 2025 |  |  | As of September 30, 2024 |
|  | Quoted Prices |  |  | Significant |  |  |  |  |  | Quoted Prices |  |  | Significant |  |  |  |
|  | in Active |  |  | Observable |  |  |  |  |  | in Active |  |  | Observable |  |  |  |
|  | Markets |  |  | Inputs |  |  |  |  |  | Markets |  |  | Inputs |  |  |  |
|  | (Level 1) |  |  | (Level 2) |  |  | Total |  |  | (Level 1) |  |  | (Level 2) |  |  | Total |
Cash and cash equivalents |  | $ | 27.4 |  |  | $ | — |  |  | $ | 27.4 |  |  | $ | 12.7 |  |  | $ | — |  |  | $ | 12.7 |
Equity funds - global (including U.S.) |  |  | — |  |  |  | 181.5 |  |  |  | 181.5 |  |  |  | — |  |  |  | 152.4 |  |  |  | 152.4 |
Real asset funds |  |  | — |  |  |  | 61.4 |  |  |  | 61.4 |  |  |  | — |  |  |  | 57.7 |  |  |  | 57.7 |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. bond funds |  |  | 50.7 |  |  |  | — |  |  |  | 50.7 |  |  |  | 55.6 |  |  |  | — |  |  |  | 55.6 |
U.S. government index funds |  |  | 38.3 |  |  |  | — |  |  |  | 38.3 |  |  |  | 33.9 |  |  |  | — |  |  |  | 33.9 |
Global funds (including U.S.) |  |  | — |  |  |  | 68.4 |  |  |  | 68.4 |  |  |  | — |  |  |  | 62.5 |  |  |  | 62.5 |
Total |  | $ | 116.4 |  |  | $ | 311.3 |  |  | $ | 427.7 |  |  | $ | 102.2 |  |  | $ | 272.6 |  |  | $ | 374.8 |
|  | As of September 30, 2025 |  |  | As of September 30, 2024 |
|  | Quoted Prices |  |  | Significant |  |  |  |  |  | Quoted Prices |  |  | Significant |  |  |  |
|  | in Active |  |  | Observable |  |  |  |  |  | in Active |  |  | Observable |  |  |  |
|  | Markets |  |  | Inputs |  |  |  |  |  | Markets |  |  | Inputs |  |  |  |
|  | (Level 1) |  |  | (Level 2) |  |  | Total |  |  | (Level 1) |  |  | (Level 2) |  |  | Total |
Cash and cash equivalents |  | $ | 13.1 |  |  | $ | — |  |  | $ | 13.1 |  |  | $ | 1.6 |  |  | $ | — |  |  | $ | 1.6 |
U.S. stock/bond mutual funds |  |  | 294.5 |  |  |  | 44.4 |  |  |  | 338.9 |  |  |  | 229.1 |  |  |  | 89.0 |  |  |  | 318.1 |
International fund |  |  | 1.4 |  |  |  | 19.5 |  |  |  | 20.9 |  |  |  | — |  |  |  | 19.7 |  |  |  | 19.7 |
Total |  | $ | 309.0 |  |  | $ | 63.9 |  |  | $ | 372.9 |  |  | $ | 230.7 |  |  | $ | 108.7 |  |  | $ | 339.4 |
|  | As of September 30, 2025 |  |  | As of September 30, 2024 |
|  | Quoted Prices |  |  | Significant |  |  |  |  |  | Quoted Prices |  |  | Significant |  |  |  |
|  | in Active |  |  | Observable |  |  |  |  |  | in Active |  |  | Observable |  |  |  |
|  | Markets |  |  | Inputs |  |  |  |  |  | Markets |  |  | Inputs |  |  |  |
|  | (Level 1) |  |  | (Level 2) |  |  | Total |  |  | (Level 1) |  |  | (Level 2) |  |  | Total |
Cash and cash equivalents |  | $ | 10.1 |  |  | $ | — |  |  | $ | 10.1 |  |  | $ | 9.9 |  |  | $ | — |  |  | $ | 9.9 |
Equity funds - global (including U.S.) |  |  | — |  |  |  | 117.1 |  |  |  | 117.1 |  |  |  | — |  |  |  | 102.2 |  |  |  | 102.2 |
Real asset funds |  |  | — |  |  |  | 43.1 |  |  |  | 43.1 |  |  |  | — |  |  |  | 40.2 |  |  |  | 40.2 |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. bond funds |  |  | 35.1 |  |  |  | — |  |  |  | 35.1 |  |  |  | 38.2 |  |  |  | — |  |  |  | 38.2 |
U.S. government index funds |  |  | 30.2 |  |  |  | — |  |  |  | 30.2 |  |  |  | 25.2 |  |  |  | — |  |  |  | 25.2 |
Global funds (including U.S.) |  |  | — |  |  |  | 49.2 |  |  |  | 49.2 |  |  |  | — |  |  |  | 44.1 |  |  |  | 44.1 |
Total |  | $ | 75.4 |  |  | $ | 209.4 |  |  | $ | 284.8 |  |  | $ | 73.3 |  |  | $ | 186.5 |  |  | $ | 259.8 |
|  | As of September 30, 2025 |  |  | As of September 30, 2024 |
|  | Quoted Prices |  |  | Significant |  |  |  |  |  | Quoted Prices |  |  | Significant |  |  |  |
|  | in Active |  |  | Observable |  |  |  |  |  | in Active |  |  | Observable |  |  |  |
|  | Markets |  |  | Inputs |  |  |  |  |  | Markets |  |  | Inputs |  |  |  |
|  | (Level 1) |  |  | (Level 2) |  |  | Total |  |  | (Level 1) |  |  | (Level 2) |  |  | Total |
Cash and cash equivalents |  | $ | 12.1 |  |  | $ | — |  |  | $ | 12.1 |  |  | $ | 0.7 |  |  | $ | — |  |  | $ | 0.7 |
U.S. stock/bond mutual funds |  |  | 239.3 |  |  |  | — |  |  |  | 239.3 |  |  |  | 224.2 |  |  |  | — |  |  | $ | 224.2 |
Total |  | $ | 251.4 |  |  | $ | — |  |  | $ | 251.4 |  |  | $ | 224.9 |  |  | $ | — |  |  | $ | 224.9 |
|  | As of September 30, 2025 |  |  | As of September 30, 2024 |
|  | Quoted Prices |  |  | Significant |  |  |  |  |  | Quoted Prices |  |  | Significant |  |  |  |
|  | in Active |  |  | Observable |  |  |  |  |  | in Active |  |  | Observable |  |  |  |
|  | Markets |  |  | Inputs |  |  |  |  |  | Markets |  |  | Inputs |  |  |  |
|  | (Level 1) |  |  | (Level 2) |  |  | Total |  |  | (Level 1) |  |  | (Level 2) |  |  | Total |
Cash and cash equivalents |  | $ | 10.2 |  |  | $ | — |  |  | $ | 10.2 |  |  | $ | 1.7 |  |  | $ | — |  |  | $ | 1.7 |
Equity funds - global (including U.S.) |  |  | — |  |  |  | 41.3 |  |  |  | 41.3 |  |  |  | — |  |  |  | 30.6 |  |  |  | 30.6 |
Real asset funds |  |  | — |  |  |  | 11.7 |  |  |  | 11.7 |  |  |  | — |  |  |  | 10.6 |  |  |  | 10.6 |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. bond funds |  |  | 9.9 |  |  |  | — |  |  |  | 9.9 |  |  |  | 10.6 |  |  |  | — |  |  |  | 10.6 |
U.S. government index funds |  |  | 5.2 |  |  |  | — |  |  |  | 5.2 |  |  |  | 5.2 |  |  |  | — |  |  |  | 5.2 |
Global funds (including U.S.) |  |  | — |  |  |  | 12.3 |  |  |  | 12.3 |  |  |  | — |  |  |  | 11.2 |  |  |  | 11.2 |
Total |  | $ | 25.3 |  |  | $ | 65.3 |  |  | $ | 90.6 |  |  | $ | 17.5 |  |  | $ | 52.4 |  |  | $ | 69.9 |
|  | As of September 30, 2025 |  |  | As of September 30, 2024 |
|  | Quoted Prices |  |  | Significant |  |  |  |  |  | Quoted Prices |  |  | Significant |  |  |  |
|  | in Active |  |  | Observable |  |  |  |  |  | in Active |  |  | Observable |  |  |  |
|  | Markets |  |  | Inputs |  |  |  |  |  | Markets |  |  | Inputs |  |  |  |
|  | (Level 1) |  |  | (Level 2) |  |  | Total |  |  | (Level 1) |  |  | (Level 2) |  |  | Total |
U.S. stock/bond mutual funds |  | $ | 49.6 |  |  | $ | 44.4 |  |  | $ | 94.0 |  |  | $ | — |  |  | $ | 89.0 |  |  | $ | 89.0 |
International fund |  |  | — |  |  |  | 19.5 |  |  |  | 19.5 |  |  |  | — |  |  |  | 18.5 |  |  |  | 18.5 |
Total |  | $ | 49.6 |  |  | $ | 63.9 |  |  | $ | 113.5 |  |  | $ | — |  |  | $ | 107.5 |  |  | $ | 107.5 |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefit obligations including accumulated benefit obligation and projected benefit obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (e) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (d)(5) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amounts related to pension plans and/or other employee benefit plans in accumulated other comprehensive income (loss) expected to be recognized as components of net periodic benefit cost over the next fiscal year, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfAmountsInAccumulatedOtherComprehensiveIncomeLossToBeRecognizedOverNextFiscalYearTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 + Details
Name: | us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfAssumptionsUsedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefit obligation and plan assets for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 + Details
Name: | us-gaap_ScheduleOfBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of beginning and ending balances of the fair value of plan assets of pension plans and/or other employee benefit plans showing separately, if applicable, the effects during the period attributable to each of the following: actual return on plan assets, foreign currency exchange rate changes, contributions by the employer, contributions by plan participants, benefits paid, business combinations, divestitures, and settlements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (b) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfChangesInFairValueOfPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (f) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the assumed health care cost trend rates for the next year used to measure the expected cost of benefits covered by the plans, including the ultimate trend rate(s) and when that rate is expected to be achieved. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (k) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (l) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfHealthCareCostTrendRatesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration