Share-based Payments (Summary of Stock Option Pricing Assumptions) (Details)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Stock options and ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate	4.20%	2.20%
Expected dividend yield	1.84%	1.74%
Expected lives of the stock options	4 years	4 years
Expected volatility	35.80%	31.80%
Stock options and ESPP | IAA
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate	3.90%
Expected dividend yield	2.05%
Expected lives of the stock options	2 years
Expected volatility	33.30%
Premium-priced stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate	3.00%
Expected dividend yield	1.63%
Expected lives of the stock options	4 years
Expected volatility	30.20%
PSUs with Market Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate	4.50%	2.70%
Expected dividend yield	0.00%	1.63%
Expected lives of the stock options	2 years	2 years
Expected volatility	32.70%	33.40%
Average expected volatility of comparable companies	48.60%	34.40%