Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance under the 2016 plan (in shares)	1,437,197		1,437,197
Stock options, granted (in shares)			105,640
Stock options, weighted average exercise price (in dollars per share)			$ 306.92
Stock options, weighted average grant date fair value (in dollars per share)			$ 108.88
Risk-free interest rate (in hundredths)			4.10%
Expected life (in years)			5 years 8 months 12 days
Stock volatility (in hundredths)			29.80%
Dividend yield (in hundredths)			0.30%
Stock-based compensation expense	$ 7.5	$ 5.5	$ 16.0	$ 11.0
Performance Share Unit (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			37,536
Grant date fair value (in dollars per share)			$ 306.91
Performance Share Unit (PSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target award percentage			0.00%
Performance Share Unit (PSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target award percentage			200.00%
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			4,479
Grant date fair value (in dollars per share)			$ 309.42