SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)		12 Months Ended
	Oct. 01, 2022 USD ($)	Dec. 31, 2023 USD ($) app_store unit	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Capitalized Contract Costs
Amortization of capitalized contract costs		$ 646,700,000	$ 622,500,000
Contract assets		$ 33,100,000	38,200,000	$ 41,700,000
Number of app stores | app_store		2
Revenue from contract with customer, due date (no later than)		30 days
Current deferred revenue		$ 211,282,000	252,718,000	262,100,000
Deferred revenue recognized		252,700,000	262,100,000
Non-current deferred revenue		$ 0	0
Cash equivalents:
Maturity period from date of purchase for cash and cash equivalents (in days, less than)		91 days
Property and Equipment
Property and equipment, net		$ 194,525,000	176,136,000
Goodwill and Indefinite-Lived Intangible Assets
Number of reporting units | unit		1
Impairments and amortization of intangibles		$ 47,731,000	366,257,000	28,559,000
Indefinite-lived intangible assets, fair value to carrying value, percentage		110.00%
Indefinite-lived intangible assets with fair value less than 110% of carrying value		$ 76,500,000	84,300,000
Indefinite-lived intangible assets acquired	$ 49,900,000
Impairment of Intangible Assets (Excluding Goodwill) [Abstract]
Impairment of intangible assets			$ 25,800,000
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]			Impairments and amortization of intangibles
Advertising Costs
Advertising expense		519,600,000	$ 474,900,000	510,300,000
Accumulated Foreign Currency Adjustment Attributable to Parent
Foreign Currency Translation and Transaction Gains and Losses
Amount of gains (losses) reclassified to earnings		0	0	0
Redeemable Noncontrolling Interests
Redeemable Noncontrolling Interest
Adjustment of redeemable noncontrolling interests to fair value		479,000	1,401,000	$ 2,667,000
Europe | Trade names
Goodwill and Indefinite-Lived Intangible Assets
Impairment of intangible asset			244,300,000
United States
Property and Equipment
Property and equipment, net		$ 143,502,000	142,297,000
United States | Trade names
Goodwill and Indefinite-Lived Intangible Assets
Impairment of intangible asset			43,900,000
Impairments and amortization of intangibles			$ 5,500,000
Minimum
Capitalized Contract Costs
Subscription period		7 days
Minimum | App Store
Capitalized Contract Costs
Account receivable, collection term		30 days
Minimum | Purchase Made Through Applications
Capitalized Contract Costs
Account receivable, collection term		3 days
Minimum | Indefinite-lived Intangible Assets
Goodwill and Indefinite-Lived Intangible Assets
Royalty rate used for impairment assessment of indefinite-lived intangible assets (as a percent)		3.00%	3.00%
Minimum | Indefinite-lived Intangible Assets | Discount Rate
Goodwill and Indefinite-Lived Intangible Assets
Measurement input (as a percent)		0.15	0.12
Maximum
Capitalized Contract Costs
Subscription period		6 months
Maximum | App Store
Capitalized Contract Costs
Account receivable, collection term		45 days
Maximum | Purchase Made Through Applications
Capitalized Contract Costs
Account receivable, collection term		5 days
Maximum | Indefinite-lived Intangible Assets
Goodwill and Indefinite-Lived Intangible Assets
Royalty rate used for impairment assessment of indefinite-lived intangible assets (as a percent)		8.00%	8.00%
Maximum | Indefinite-lived Intangible Assets | Discount Rate
Goodwill and Indefinite-Lived Intangible Assets
Measurement input (as a percent)		0.18	0.16
Software and Software Development Costs
Property and Equipment
Property and equipment, net		$ 85,500,000	$ 72,600,000
Accounts Receivable | Customer Concentration Risk | App Store #1
Capitalized Contract Costs
Concentration risk (percent)		79.00%	70.00%
Accounts Receivable | Customer Concentration Risk | App Store #2
Capitalized Contract Costs
Concentration risk (percent)		8.00%	12.00%