RELATED PERSON TRANSACTIONS - Atlantic Automotive Corporation (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Atlantic Automotive Corporation \| Affiliated Entity \| Advertising Time
Related Party Transaction [Line Items]
Amount received	$ 0.1	$ 0.1	$ 0.1	$ 0.1

Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration