Incentive Plans - Schedule of Changes in Stock Options Outstanding (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) $ / shares shares
Number of Shares (in shares)
Beginning balance (in shares) | shares	259,750
Granted (in shares) | shares	28,900
Exercised (in shares) | shares	(36,200)
Forfeited (in shares) | shares	(7,350)
Ending balance (in shares) | shares	245,100
Exercisable (in shares) | shares	172,790
Weighted-Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 180.68
Granted (in dollars per share) | $ / shares	492.22
Exercised (in dollars per share) | $ / shares	99.28
Forfeited (in dollars per share) | $ / shares	410.81
Ending balance (in dollars per share) | $ / shares	222.54
Exercisable (in dollars per share) | $ / shares	$ 148.96
Weighted-Average Remaining Contractual Term (Years)
Outstanding, weighted average remaining contractual term (in years)	3 years 1 month 6 days
Exercisable, weighted average remaining contractual term (in years)	2 years 2 months 12 days
Aggregate Intrinsic Value (Millions of Dollars)
Outstanding, aggregate intrinsic value | $	$ 46.7
Exercisable, aggregate intrinsic value | $	$ 44.0