v3.25.2
Consolidated Balance Sheet (Parenthetical) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Accounts Receivable, Allowance for Credit Loss, Current $ 39 $ 30
Regulatory Asset 2,666 2,397
Current maturities of long-term debt 29 317
Long-term debt, net $ 18,811 $ 17,262
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 400,000,000.0 400,000,000.0
Common Stock, Shares, Outstanding 270,400,000 269,900,000
Variable Interest Entity, Primary Beneficiary    
Regulatory Asset $ 454 $ 465
Current maturities of long-term debt 29 17
Long-term debt, net 437 448
Union Electric Company    
Accounts Receivable, Allowance for Credit Loss, Current 12 12
Regulatory Asset 1,446 1,366
Current maturities of long-term debt $ 29 $ 17
Common stock, par value (in dollars per share) $ 5 $ 5
Common stock, shares authorized (in shares) 150,000,000.0 150,000,000.0
Common Stock, Shares, Outstanding 102,100,000 102,100,000
Union Electric Company | Variable Interest Entity, Primary Beneficiary    
Regulatory Asset $ 454 $ 465
Current maturities of long-term debt 29 17
Long-term debt, net 437 448
Ameren Illinois Company    
Accounts Receivable, Allowance for Credit Loss, Current 27 18
Regulatory Asset 1,192 1,011
Current maturities of long-term debt $ 0 $ 300
Common stock, no par value (in dollars per share) $ 0 $ 0
Common stock, shares authorized (in shares) 45,000,000.0 45,000,000.0
Common Stock, Shares, Outstanding 25,500,000 25,500,000