v3.25.4
Debt - Narrative 2025 (Details)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
Debt Instrument [Line Items]  
Long-term debt, excluding finance lease obligations, 2026 $ 713
Long-term debt, excluding finance lease obligations, 2027 786
Long-term debt, excluding finance lease obligations, 2028 670
Long-term debt, excluding finance lease obligations, 2029 992
Long-term debt, excluding finance lease obligations, 2030 1,599
Retirement of debt 700
Municipal Bonds  
Debt Instrument [Line Items]  
Long-term debt, excluding finance lease obligations, 2026 600
3.35% Notes due 2025 | Notes Payable to Banks  
Debt Instrument [Line Items]  
Retirement of debt $ 200
Stated interest rate 3.35%
2.4% Notes due 2025 | Notes Payable to Banks  
Debt Instrument [Line Items]  
Retirement of debt $ 400
Stated interest rate 2.40%
8.2% Debentures due 2025 | Notes Payable to Banks  
Debt Instrument [Line Items]  
Stated interest rate 8.20%
8.2% Debentures due 2025 | Debentures  
Debt Instrument [Line Items]  
Retirement of debt $ 100
Stated interest rate 8.20%