Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Taxes [Line Items]
Three-year cumulative pretax income	$ 67.3
Impairment losses	118.2	$ 0.0	$ 623.4
Decrease in valuation allowance	113.4
Net operating loss carryforwards, valuation allowance	31.2
Tax benefit associated with net operating loss carryforwards, state	56.4
Tax reserves, interest and penalties related to current year tax positions	0.0
Tax reserves, interest and penalties related to prior year tax positions	3.7
Reversal of previously recorded tax reserves and accrued interest for tax positions settled and/or closed	0.2
Unrecognized tax benefits	46.0	42.3
Net tax expense in connection with uncertain tax positions	3.3
Tax positions that, if reversed, would affect the effective tax rate	36.3	33.4
Interest and penalties recognized, net of deferred taxes	0.6	0.7	0.5
Reductions in previously accrued interest and penalties	0.0	0.0
Prepaid income taxes	15.2	42.5
Expense from change in tax rate	10.8	$ 0.0	$ 0.0
theScore
Income Taxes [Line Items]
Net operating loss carryforwards, valuation allowance	0.2
Net operating loss carryforwards	96.6
Tax benefit associated with net operating loss carryforwards, domestic	3.8
Tax benefit associated with net operating loss carryforwards, state	26.8
Tax benefit associated with net operating loss carryforward, foreign	0.2
Domestic | theScore
Income Taxes [Line Items]
Net operating loss carryforwards	17.9
State
Income Taxes [Line Items]
Net operating loss carryforwards, valuation allowance	9.0
Net operating loss carryforwards	1,200.0
Expense from change in tax rate	10.0
State | theScore
Income Taxes [Line Items]
Net operating loss carryforwards	24.0
Foreign | theScore
Income Taxes [Line Items]
Net operating loss carryforwards	$ 102.1