v3.26.1
Debt - Schedule of Selected Information about Debt Issues (Details) - USD ($)
 3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Aug. 15, 2024
Aug. 14, 2024
Debt Instrument [Line Items]        
Long-term debt, par value, gross $ 2,350,000,000      
Total short-term debt, par value 459,250,000      
Total debt, par value 2,809,250,000      
Unamortized discount & issuance costs, noncurrent, gross (22,225,000)      
Unamortized issuance cost (6,238,000) $ (6,292,000)    
Unamortized discount & issuance costs, noncurrent, net (28,463,000)      
Unamortized discount & issuance costs, current (2,203,000)      
Total debt, unamortized discount & issuance costs, (30,666,000)      
Debt 2,327,775,000 2,327,085,000    
Long-term debt 2,321,537,000 2,320,793,000    
Total short-term debt, book value 457,047,000 304,656,000    
Total debt, book value 2,778,584,000 2,625,449,000    
Long-term debt, gross, fair value 2,177,494,000      
Fair Value 2,177,494,000      
Total short-term debt, fair value 457,047,000      
Total debt, fair value 2,634,541,000      
Commercial paper        
Debt Instrument [Line Items]        
Total short-term debt, par value 459,250,000      
Unamortized discount & issuance costs, current (2,203,000)      
Total short-term debt, book value 457,047,000 304,656,000    
Total short-term debt, fair value $ 457,047,000      
Senior Notes Due 2028        
Debt Instrument [Line Items]        
Coupon Rate 4.55%      
Long-term debt, par value, gross $ 550,000,000      
Unamortized discount & issuance costs, noncurrent, gross (2,055,000)      
Debt 547,945,000 547,748,000    
Long-term debt, gross, fair value $ 549,104,000      
Senior Notes Due 2030        
Debt Instrument [Line Items]        
Coupon Rate 2.15%      
Long-term debt, par value, gross $ 400,000,000      
Unamortized discount & issuance costs, noncurrent, gross (2,275,000)      
Debt 397,725,000 397,604,000    
Long-term debt, gross, fair value $ 359,252,000      
Senior Notes Due 2032        
Debt Instrument [Line Items]        
Coupon Rate 4.80%      
Long-term debt, par value, gross $ 250,000,000      
Unamortized discount & issuance costs, noncurrent, gross (3,198,000)      
Debt 246,802,000 246,692,000    
Long-term debt, gross, fair value 247,225,000      
Senior Notes Due 2032 | Consolidation Eliminations | Subsidiaries        
Debt Instrument [Line Items]        
Long-term debt, net, book value $ 150,000,000      
Senior Notes Due 2034        
Debt Instrument [Line Items]        
Coupon Rate 5.85%      
Long-term debt, par value, gross $ 450,000,000      
Unamortized discount & issuance costs, noncurrent, gross (4,675,000)      
Debt 445,325,000 445,218,000    
Long-term debt, gross, fair value $ 463,991,000      
Junior Subordinated Debentures Due 2057        
Debt Instrument [Line Items]        
Coupon Rate 5.275%      
Long-term debt, par value, gross $ 125,000,000      
Unamortized discount & issuance costs, noncurrent, gross (1,534,000)      
Debt 123,466,000 123,461,000    
Long-term debt, gross, fair value $ 108,704,000      
Basis spread 1.35%      
Junior Subordinated Debentures Due 2061        
Debt Instrument [Line Items]        
Coupon Rate 4.25%      
Long-term debt, par value, gross $ 325,000,000      
Unamortized discount & issuance costs, noncurrent, gross (7,506,000)      
Debt 317,494,000 317,472,000    
Long-term debt, gross, fair value $ 200,200,000      
Term Loan Due 2027        
Debt Instrument [Line Items]        
Coupon Rate 5.127%      
Long-term debt, par value, gross $ 250,000,000      
Unamortized discount & issuance costs, noncurrent, gross (982,000)      
Debt 249,018,000 $ 248,890,000    
Long-term debt, gross, fair value $ 249,018,000      
Term Loan Credit Agreement        
Debt Instrument [Line Items]        
Balance of commercial paper at end of period (par value)     $ 250,000,000 $ 170,000,000