Acquisitions - Narrative (Details) $ in Millions	3 Months Ended	6 Months Ended		12 Months Ended
	Mar. 31, 2019 USD ($) Displays	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2022 USD ($) Displays	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2018 Displays
Business Acquisition [Line Items]
Noncash or part noncash acquisition, value of assets acquired		$ 13.6	$ 29.4
Acquired businesses
Business Acquisition [Line Items]
Noncash or part noncash acquisition, value of assets acquired						$ 35.4
Acquired businesses | Subsequent event
Business Acquisition [Line Items]
Noncash or part noncash acquisition, value of assets acquired				$ 9.2
Acquired businesses | Digital displays
Business Acquisition [Line Items]
Number of displays | Displays							14
Acquired businesses | Digital displays | Subsequent event
Business Acquisition [Line Items]
Number of displays | Displays				4
Acquired businesses | Static displays
Business Acquisition [Line Items]
Number of displays | Displays							7
Acquired businesses other
Business Acquisition [Line Items]
Noncash or part noncash acquisition, value of assets acquired	$ 24.0
Deposit for pending acquisition					$ 19.0
Acquired businesses other | Digital displays
Business Acquisition [Line Items]
Number of displays | Displays	8