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Segment Reporting
 3 Months Ended
Mar. 31, 2025
Segment Reporting [Abstract]  
Segment Reporting
(7) Segment Reporting
Each of our geographic regions (U.S., Canada, Mexico, Central & South America, Europe, Asia, and SE Asia) is engaged in business activities for which it may earn sales and incur expenses. Discrete financial information is available at the geographic region level through our internal Return on Asset (ROA) reporting. The ROA reporting is ultimately a selling location income statement with an ROA calculation and the results are compiled by geographic region. ROA pre-tax profit measures financial performance and drives compensation programs.
Our Chief Operating Decision Maker (CODM) is a group consisting of our Chief Executive Officer and President/Chief Sales Officer. We consider each geographic region to be an operating segment. The CODM regularly reviews ROA pre-tax profit to make decisions about the allocation of resources at the geographic region level. Operating segment significant expense categories and amounts are not regularly reviewed by or provided to our CODM. Segment expenses represent the difference between net sales and ROA pre-tax profit and consist of cost of sales and selling, general, and administrative (SG&A) expenses. However, our CODM reviews consolidated expense information to manage the operations of the business.
Considering our operating segments outside of the U.S. individually represent less than 10% of our total operating segment net sales, ROA pre-tax profit, and ROA assets, we do not consider them reportable segments. Therefore, we report the results of our one reportable segment (U.S.) below. Further details on our significant accounting policies can be found in Note 1 of our most recently filed annual report on Form 10-K, which are applied company wide.
Our measure of profit or loss is ROA pre-tax profit and our measure of assets is ROA assets. ROA pre-tax profit is not a financial measure calculated in accordance with GAAP and excludes inter-company transactions.
The following table presents reportable segment net sales from external customers for the periods ended March 31:
Three-month Period
20252024
U.S. net sales from external customers $1,629.4 1,578.9 

The following table presents a reconciliation of reportable segment ROA pre-tax profit to condensed consolidated income before income taxes for the periods ended March 31:
Three-month Period
20252024
U.S. ROA pre-tax profit $340.5 338.2 
Other operating segment pre-tax profit (1)
52.6 51.6 
Income before income taxes$393.1 389.8 
(1)    Other operating segment pre-tax profit includes ROA pre-tax profit for all other operating segments that are below the reportable segment quantitative threshold and immaterial allocations excluded from ROA pre-tax profit.
The following table presents reportable segment ROA assets for the periods ended:
March 31,
2025		December 31,
2024
U.S. ROA assets (1)
$2,408.5 2,189.6 
(1)    Operating segment ROA assets primarily include accounts receivable, inventory, and in-market location vehicles, and exclude certain centrally managed assets.
Other Segment Disclosures
Interest revenue and interest expense included in the ROA pre-tax profit are not material. The following table presents reportable segment ROA pre-tax profit depreciation and amortization expense for the periods ended March 31:
Three-month Period
20252024
U.S. ROA pre-tax profit depreciation and amortization expense$40.3 36.1