v3.26.1
Debt - Schedule of Selected Information about Debt Issues (Details)
 6 Months Ended
Jun. 30, 2026
USD ($)
subsidiary
Jun. 26, 2026
USD ($)
Jun. 25, 2026
USD ($)
Dec. 31, 2025
USD ($)
Debt Instrument [Line Items]        
Long-term debt, par value, gross $ 2,700,000,000      
Total short-term debt, par value 279,000,000      
Total debt, par value 2,979,000,000      
Unamortized discount & issuance costs, noncurrent, gross (28,519,000)      
Unamortized issuance cost (6,185,000)     $ (6,292,000)
Unamortized discount & issuance costs, noncurrent, net (34,704,000)      
Unamortized discount & issuance costs, current (1,047,000)      
Total debt, unamortized discount & issuance costs, (35,751,000)      
Debt 2,671,481,000     2,327,085,000
Long-term debt 2,665,296,000     2,320,793,000
Total short-term debt, book value 277,953,000     304,656,000
Total debt, book value 2,943,249,000     2,625,449,000
Long-term debt, gross, fair value 2,504,936,000      
Fair Value 2,504,936,000      
Total short-term debt, fair value 277,953,000      
Total debt, fair value 2,782,889,000      
Commercial paper        
Debt Instrument [Line Items]        
Total short-term debt, par value 279,000,000      
Unamortized discount & issuance costs, current (1,047,000)      
Total short-term debt, book value 277,953,000     304,656,000
Total short-term debt, fair value $ 277,953,000      
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 (1,859,000)      
Debt 548,141,000     547,748,000
Long-term debt, gross, fair value $ 548,762,000      
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 (2,154,000)      
Debt 397,846,000     397,604,000
Long-term debt, gross, fair value $ 360,952,000      
Senior Notes Due 2032        
Debt Instrument [Line Items]        
Coupon Rate 4.80%      
Long-term debt, par value, gross $ 400,000,000      
Unamortized discount & issuance costs, noncurrent, gross (7,573,000)      
Debt 392,427,000     246,692,000
Long-term debt, gross, fair value $ 394,428,000      
Senior Notes Due 2032 | Consolidation Eliminations | Subsidiaries        
Debt Instrument [Line Items]        
Coupon Rate 4.80%      
Long-term debt, net, book value $ 150,000,000      
Number of insurance subsidiaries | subsidiary 2      
Debt instrument, unamortized discount $ 4,200,000      
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 (4,567,000)      
Debt 445,433,000     445,218,000
Long-term debt, gross, fair value $ 464,247,000      
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 (1,530,000)      
Debt 123,470,000     123,461,000
Long-term debt, gross, fair value $ 92,299,000      
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 (7,484,000)      
Debt 317,516,000     317,472,000
Long-term debt, gross, fair value $ 197,600,000      
Term Loan Due 2027        
Debt Instrument [Line Items]        
Coupon Rate 5.116%      
Long-term debt, par value, gross $ 450,000,000      
Unamortized discount & issuance costs, noncurrent, gross (3,352,000)      
Debt 446,648,000     $ 248,890,000
Long-term debt, gross, fair value $ 446,648,000      
Term Loan Credit Agreement        
Debt Instrument [Line Items]        
Balance of commercial paper at end of period (par value)   $ 450,000,000 $ 250,000,000