Equity Incentive Plan Rollforward of Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Options, Outstanding, Number, Beginning	308,149
Options, Grants in Period, Net of Forfeitures	27,027
Options, Exercises in Period	(61,268)
Options, Forfeitures in Period	(13,950)
Options, Outstanding, Number, Ending	259,958
Options, Exercisable, Number	203,600
Aggregate Intrinsic Value [Abstract]
Options, Outstanding, Intrinsic Value	$ 127.2	$ 250.5
Options, Exercisable, Intrinsic Value	$ 123.5
Weighted Average Exercise Price [Abstract]
Options, Outstanding, Weighted Average Exercise Price, Beginning	$ 635.00
Options, Grants in Period, Weighted Average Exercise Price	1,027.33
Options, Exercises in Period, Weighted Average Exercise Price	313.93
Options, Forfeitures in Period, Weighted Average Exercise Price	787.01
Options, Outstanding, Weighted Average Exercise Price, Ending	743.30
Options, Exercisable, Weighted Average Exercise Price	$ 618.26