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Revenue | 9 Months Ended
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Sep. 30, 2025
Revenue from Contract with Customer [Abstract] |
Revenue | Note 5. Revenue The following table presents revenue disaggregated by type:
|  | Three months ended September 30, |  | Nine months ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Transactional seller revenue |  | $ | 215.8 |  |  | $ | 206.6 |  |  | $ | 673.6 |  |  | $ | 695.9 |
Transactional buyer revenue |  | 543.8 |  |  | 486.9 |  |  | 1,661.1 |  |  | 1,522.3 |
Marketplace services revenue |  | 85.4 |  |  | 86.4 |  |  | 250.0 |  |  | 269.9 |
Total service revenue |  | 845.0 |  |  | 779.9 |  |  | 2,584.7 |  |  | 2,488.1 |
Inventory sales revenue |  | 247.7 |  |  | 201.9 |  |  | 802.6 |  |  | 654.5 |
Total revenue |  | $ | 1,092.7 |  |  | $ | 981.8 |  |  | $ | 3,387.3 |  |  | $ | 3,142.6 |
The following table presents revenue disaggregated by geographic area, based on the location of the underlying auction activity or rendering of services:
|  | Three months ended September 30, |  | Nine months ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
United States |  | $ | 799.7 |  |  | $ | 724.0 |  |  | $ | 2,470.1 |  |  | $ | 2,282.7 |
Canada |  | 157.9 |  |  | 130.7 |  |  | 496.6 |  |  | 466.4 |
Europe |  | 79.1 |  |  | 84.9 |  |  | 248.3 |  |  | 248.5 |
Australia |  | 33.7 |  |  | 27.1 |  |  | 103.9 |  |  | 88.9 |
Other |  | 22.3 |  |  | 15.1 |  |  | 68.4 |  |  | 56.1 |
Total revenue |  | $ | 1,092.7 |  |  | $ | 981.8 |  |  | $ | 3,387.3 |  |  | $ | 3,142.6 |

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-15 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 606 -Publisher FASB -URI https://asc.fasb.org/606/tableOfContent + Details
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