Acquisitions and Dispositions - Allocation of Purchase Price (Details) - USD ($) $ in Millions	14 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Oct. 19, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill	$ 2,689.5	$ 2,822.5		$ 1,157.1
theScore
Business Acquisition [Line Items]
Cash and cash equivalents	160.3		$ 160.3
Other current assets	22.8		22.8
ROU assets	2.6		2.6
Property and equipment	1.8
Goodwill	1,691.7		1,690.2
Measurement period adjustments , Goodwill	1.5
Other long-term assets	5.2		5.2
Total assets	2,223.0		2,221.5
Measurement period adjustments, Total Assets	1.5
Accounts payable, accrued expenses and other current liabilities	69.4		67.9
Measurement period adjustments Accounts payable, accrued expenses and other current liabilities	1.5
Deferred tax liabilities	69.2		69.2
Other non-current liabilities	1.7		1.7
Total liabilities	140.3		138.8
Measurement period adjustments, Liabilities	1.5
Net assets acquired	2,082.7		2,082.7
Measurement period adjustments, net assets acquired	0.0
theScore | Property and equipment
Business Acquisition [Line Items]
Property and equipment			1.8
theScore | Media technology
Business Acquisition [Line Items]
Customer relationship asset, other intangible assets	57.0		57.0
theScore | Customer relationships
Business Acquisition [Line Items]
Customer relationship asset, other intangible assets	8.0		8.0
theScore | Other
Business Acquisition [Line Items]
Customer relationship asset, other intangible assets	2.6		2.6
theScore | Gaming licenses
Business Acquisition [Line Items]
Customer relationship asset, other intangible assets	160.0		160.0
theScore | Tradename
Business Acquisition [Line Items]
Customer relationship asset, other intangible assets	100.0		100.0
theScore | Advertising relationships
Business Acquisition [Line Items]
Customer relationship asset, other intangible assets	$ 11.0		$ 11.0