v3.26.1
Shareholders' Equity - Schedule of Reconciliation of Changes in Stockholders Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2026
Jun. 30, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Common stock outstanding, beginning balance (in shares)     161,568,384       161,568,384  
Shareholders' equity, beginning balance $ 14,908,650 $ 14,282,892 $ 13,558,890 $ 13,137,965 $ 12,780,481 $ 12,157,669 $ 13,558,890 $ 12,157,669
Net income 242,689 581,899 402,964 186,429 485,576 351,858 1,227,552 1,023,863
Other comprehensive (loss) income (4,865) (4,938) (4,805) 1,409 (5,587) 16,423 $ (14,608) 12,245
Cash dividends (169,142) (168,760) (160,407) (138,443) (138,416) (135,453)    
Public and other stock offerings 274,119 205,383 474,643 192,757 3,841 383,537    
Stock-based compensation plans $ 6,607 12,174 11,607 5,721 12,070 6,447    
Common stock outstanding, ending balance (in shares) 168,986,249           168,986,249  
Shareholders' equity, ending balance $ 15,258,058 $ 14,908,650 $ 14,282,892 $ 13,385,838 $ 13,137,965 $ 12,780,481 $ 15,258,058 $ 13,385,838
Cash dividends per share (USD per share) $ 1.00 $ 1.00 $ 1.00 $ 0.87 $ 0.87 $ 0.87 $ 3.00 $ 2.61
Common stock                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Common stock outstanding, beginning balance (in shares) 166,918,310 165,434,477 161,568,384 158,835,123 158,726,065 155,258,845 161,568,384 155,258,845
Shareholders' equity, beginning balance $ 835 $ 827 $ 808 $ 794 $ 794 $ 776 $ 808 $ 776
Public and other stock offerings (in shares) 2,001,479 1,445,607 3,709,647 1,630,943 26,367 3,329,358    
Public and other stock offerings $ 10 $ 7 $ 18 $ 8   $ 17    
Stock-based compensation plans (in shares) 66,460 38,226 156,446 54,945 82,691 137,862    
Stock-based compensation plans $ 0 $ 1 $ 1 $ 1   $ 1    
Common stock outstanding, ending balance (in shares) 168,986,249 166,918,310 165,434,477 160,521,011 158,835,123 158,726,065 168,986,249 160,521,011
Shareholders' equity, ending balance $ 845 $ 835 $ 827 $ 803 $ 794 $ 794 $ 845 $ 803
Additional Paid-in Capital                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Shareholders' equity, beginning balance 8,925,235 8,707,686 8,221,455 7,880,436 7,864,525 7,474,559 8,221,455 7,474,559
Public and other stock offerings 274,109 205,376 474,625 192,749 3,841 383,520    
Stock-based compensation plans 6,607 12,173 11,606 5,720 12,070 6,446    
Shareholders' equity, ending balance 9,205,951 8,925,235 8,707,686 8,078,905 7,880,436 7,864,525 9,205,951 8,078,905
Accumulated Other Comprehensive Income (Loss)                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Shareholders' equity, beginning balance 465,272 470,210 475,015 476,551 482,138 465,715 475,015 465,715
Other comprehensive (loss) income (4,865) (4,938) (4,805) 1,409 (5,587) 16,423    
Shareholders' equity, ending balance 460,407 465,272 470,210 477,960 476,551 482,138 460,407 477,960
Retained Earnings                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Shareholders' equity, beginning balance 5,517,308 5,104,169 4,861,612 4,780,184 4,433,024 4,216,619 4,861,612 4,216,619
Net income 242,689 581,899 402,964 186,429 485,576 351,858    
Cash dividends (169,142) (168,760) (160,407) (138,443) (138,416) (135,453)    
Shareholders' equity, ending balance $ 5,590,855 $ 5,517,308 $ 5,104,169 $ 4,828,170 $ 4,780,184 $ 4,433,024 $ 5,590,855 $ 4,828,170