Quarterly report pursuant to Section 13 or 15(d)

Dispositions - Narrative (Details)

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Dispositions - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Mar. 30, 2018
Jun. 30, 2018
Sep. 01, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Cancellation fee $ 34.7 $ 34.7  
Loss on sale   $ 2.1  
Sold | Ticketfly      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Aggregate unadjusted purchase price     $ 200.0
Cash portion of purchase price     150.0
Convertible subordinated promissory note     50.0
Unamortized discount     13.8
Costs to sell     4.8
Working capital and certain indemnification provisions adjustments     7.5
Net purchase price     $ 174.0