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v3.25.3

Condensed Consolidated Statements Of Capitalization - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Stockholders' equity: |  |
Common stock, $0.50 par value | $ 143,195 | $ 139,105
Capital in excess of par value | 4,519,304 | 4,199,836
Retained earnings | 2,244,995 | 1,949,492
Treasury stock, at cost | (91,195) | (89,624)
Total stockholders' equity | 6,816,299 | 6,198,809
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Long-term debt of subsidiaries | 3,180,003 | 3,101,096
Total long-term debt | 7,878,003 | 7,559,096
Current portion of long-term debt | 135,763 | 142,807
Long-term debt, excluding current portion | 7,742,240 | 7,416,289
Less: debt issuance costs and unamortized discount on debt | 50,149 | 47,908
Long-term debt, excluding current portion, net of debt issuance costs and unamortized discount on debt | 7,692,091 | 7,368,381
Total capitalization | 14,508,390 | 13,567,190
Notes Ranging From 0.00% To 0.99% [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Long-term debt of subsidiaries | 2,563 | 2,637
Notes Ranging From 1.00% To 1.99% [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Long-term debt of subsidiaries | 21,973 | 11,732
Notes Ranging From 2.00% To 2.99% [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Long-term debt of subsidiaries | 205,203 | 206,297
Notes Ranging From 3.00% To 3.99% [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Long-term debt of subsidiaries | 1,253,769 | 1,258,003
Notes Ranging From 4.00% To 4.99% [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Long-term debt of subsidiaries | 1,236,724 | 1,239,032
Notes Ranging From 5.00% To 5.99% [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Long-term debt of subsidiaries | 412,260 | 312,260
Notes Ranging From 6.00% To 6.99% [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Long-term debt of subsidiaries | 31,000 | 31,000
Notes Ranging From 7.00% To 7.99% [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Long-term debt of subsidiaries | 4,711 | 27,888
Notes Ranging From 8.00% To 8.99% [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Long-term debt of subsidiaries |  | 447
Notes Ranging From 9.00% To 9.99% [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Long-term debt of subsidiaries | 11,800 | 11,800
Revolving Credit Agreement, Due 2027 [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Notes payable to bank under revolving credit agreement, variable rate, due 2027 |  | 413,000
Commercial Paper Program [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Unsecured notes payable | 153,000 |
Notes At 2.40% Due 2031 [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Unsecured notes payable | 400,000 | 400,000
Notes At 2.704% Due 2030 [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Unsecured notes payable | 500,000 | 500,000
Notes Ranging From 3.01% To 3.59% Due 2029 Through 2050 [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Unsecured notes payable | 1,125,000 | 1,125,000
Notes At 4.276%, Due 2049 [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Unsecured notes payable | 500,000 | 500,000
Notes At 4.80%, Due 2027 [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Unsecured notes payable | 500,000 | 500,000
Notes At 5.25%, Due 2035 [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Unsecured notes payable | 500,000 |
Notes At 5.30%, Due 2052 [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Unsecured notes payable | 500,000 | 500,000
Notes At 5.375%, Due 2034 [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Unsecured notes payable | 500,000 | 500,000
Notes At 5.95%, Due 2033 through 2034 [Member] |  |
Long-term debt of subsidiaries (substantially collateralized by utility plant): |  |
Unsecured notes payable | $ 20,000 | $ 20,000

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