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Supplemental Information (Leases) (Details) $ in Millions | Dec. 31, 2024 USD ($)
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Schedule of Supplemental Balance Sheet Information Related to Operating Leases [Line Items] |
Operating Lease, Right-of-Use Asset | $ 72
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Other assets
Operating Lease, Liability, Current | $ 5
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Other current liabilities
Operating Lease, Liability, Noncurrent | $ 67
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other deferred credits and liabilities
Operating Lease, Weighted Average Remaining Lease Term | 29 years
Operating Lease, Weighted Average Discount Rate, Percent | 5.30%
Lessee, Operating Lease, Liability, to be Paid, Maturity [Line Items] |
2025 | $ 8
2026 | 5
2027 | 4
2028 | 4
2029 | 4
Thereafter | 131
Total lease payments | 156
Less imputed interest | 84
Total | 72
Ameren Missouri |
Schedule of Supplemental Balance Sheet Information Related to Operating Leases [Line Items] |
Operating Lease, Right-of-Use Asset | 69
Operating Lease, Liability, Current | 4
Operating Lease, Liability, Noncurrent | $ 65
Operating Lease, Weighted Average Remaining Lease Term | 30 years
Operating Lease, Weighted Average Discount Rate, Percent | 5.30%
Lessee, Operating Lease, Liability, to be Paid, Maturity [Line Items] |
2025 | $ 7
2026 | 4
2027 | 3
2028 | 4
2029 | 4
Thereafter | 131
Total lease payments | 153
Less imputed interest | 84
Total | $ 69

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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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