Share-based Payments (Fair Value Assumptions) (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Stock options
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		4 years	4 years
Expected volatility		35.80%	31.80%
Stock options | 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	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			4 years
Expected volatility			30.20%
Performance Share Units With Market Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate	4.40%	4.50%	2.70%
Expected dividend yield	0.00%	0.00%	1.63%
Expected lives	3 years	2 years	2 years
Expected volatility	32.20%	32.70%	33.40%
Average expected volatility of comparable companies	48.30%	48.60%	34.40%
Employee Share Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate	4.40%	5.30%
Expected dividend yield	1.26%	1.81%
Expected lives	9 months	8 months
Expected volatility	27.50%	28.10%