Summary of Significant Accounting Policies (Narrative) (Details)		12 Months Ended
	Oct. 21, 2020 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) vote customer shares	Dec. 31, 2021 USD ($) customer shares	Dec. 31, 2020 USD ($) shares	Sep. 16, 2020 USD ($) $ / shares
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Advertising costs		$ 379,000,000	$ 383,000,000	$ 246,900,000
Foreign currency transaction gains (losses)		(1,200,000)	12,200,000	$ (4,000,000.0)
Accounts receivable contractually due in excess of one-year		$ 281,300,000	$ 293,400,000
Threshold period for write-off of capitalized development costs		3 years
Antidilutive securities excluded from EPS | shares		800,000	400,000	300,000
Repurchase amount (up to)		$ 1,500,000,000
Available for repurchase under program		135,300,000
Aggregate cost	$ 250,600,000			$ 356,701,000
Decrease to retained earnings		$ (2,105,641,000)	$ (2,098,047,000)
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to retained earnings				$ 2,000,000
Accounts Receivable | Customer Concentration Risk
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of customers | customer		2	2
Accounts Receivable | Customer Concentration Risk | Customer One
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage		14.00%	14.00%
Accounts Receivable | Customer Concentration Risk | Customer Two
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage		12.00%	13.00%
Class A  Common Stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Common stock, voting rights | vote		1
Common stock, conversion ratio		1
Stockholders entitled election of Board of Directors		25.00%
Repurchase amount (up to)					$ 250,000,000
Share repurchases | shares	10,800,000	0	0	14,785,000
Additional percentage					2.00%
Average purchase (in dollars per share) | $ / shares	$ 23.20
Class B  Common Stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Common stock, voting rights | vote		10
Common stock, conversion ratio		1
Share repurchases | shares				0
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Period of related affiliation arrangement (up to)		5 years
Maximum | Class A  Common Stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Share price (in dollars per share) | $ / shares					$ 26.50
Minimum | Class A  Common Stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Share price (in dollars per share) | $ / shares					$ 22.50
Prepaid expenses and other current assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income tax receivable, program rights		$ 143,100,000
Other Noncurrent Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income tax receivable, program rights		$ 104,500,000
2011 Non-Employee Director Plan | Restricted stock units
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Vesting percentage		100.00%