Equity Transactions (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
	May 17, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Equity [Abstract]
Cash dividends declared per common share (in dollars per share)	$ 1.65	$ 1.65	$ 1.50	$ 3.30	$ 3.00
Stock repurchased during period, shares		51,840		51,840
Weighted average price (in dollars per share)		$ 192.87		$ 192.87
Stock repurchased during period, value		$ 10.0		$ 10.0
Shares available for repurchase (in shares)		776,512		776,512