Debt - Schedule of Selected Information about Debt Issues (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	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	306,000,000
Total debt, par value	2,656,000,000
Unamortized discount & issuance costs, noncurrent, gross	(22,915,000)
Unamortized issuance cost	(6,292,000)
Unamortized discount & issuance costs, noncurrent, net	(29,207,000)
Unamortized discount & issuance costs, current	(1,344,000)
Total debt, unamortized discount & issuance costs,	(30,551,000)
Debt	2,327,085,000	$ 2,324,251,000
Long-term debt	2,320,793,000	2,324,251,000
Total short-term debt, book value	304,656,000	415,401,000
Total debt, book value	2,625,449,000	2,739,652,000
Long-term debt, gross, fair value	2,231,612,000
Fair Value	2,225,320,000
Total short-term debt, fair value	304,656,000
Total debt, fair value	2,529,976,000
Commercial paper
Debt Instrument [Line Items]
Total short-term debt, par value	306,000,000
Unamortized discount & issuance costs, current	(1,344,000)
Total short-term debt, book value	304,656,000	415,401,000
Total short-term debt, fair value	$ 304,656,000
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	(2,252,000)
Debt	547,748,000	546,999,000
Long-term debt, gross, fair value	$ 555,115,000
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	(2,396,000)
Debt	397,604,000	397,132,000
Long-term debt, gross, fair value	$ 361,852,000
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	(3,308,000)
Debt	246,692,000	246,272,000
Long-term debt, gross, fair value	251,923,000
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	(4,782,000)
Debt	445,218,000	444,814,000
Long-term debt, gross, fair value	$ 472,792,000
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	(1,539,000)
Debt	123,461,000	123,443,000
Long-term debt, gross, fair value	$ 123,290,000
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	(7,528,000)
Debt	317,472,000	317,387,000
Long-term debt, gross, fair value	$ 217,750,000
Term Loan Due 2027
Debt Instrument [Line Items]
Coupon Rate	5.353%
Long-term debt, par value, gross	$ 250,000,000
Unamortized discount & issuance costs, noncurrent, gross	(1,110,000)
Debt	248,890,000	$ 248,204,000
Long-term debt, gross, fair value	$ 248,890,000
Term Loan Credit Agreement
Debt Instrument [Line Items]
Balance of commercial paper at end of period (par value)			$ 250,000,000	$ 170,000,000