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Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Reclassification
Reclassification of foreign exchange gain	$ 0.2		$ 0.3
Typical payment term to consignors from our auctions and marketplaces		21 days
Operating lease Right of-use assets
Reclassification
Reclassification of assets				$ 122.9
Auction proceeds payable
Reclassification
Reclassification of liabilities				23.3
Operating lease liabilities current
Reclassification
Reclassification of liabilities				12.7
Operating lease liabilities non-current
Reclassification
Reclassification of liabilities				$ 111.9

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- Definition

The typical payment term to consignors from our auctions and marketplaces.

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- Definition

Amount of reclassification of foreign exchange gain (loss).

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- Definition

Amount of reclassification of assets from one asset class to another asset class.

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Amount of reclassification of liabilities from one liability class to other liability class.

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