BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2024 shares	Jun. 30, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Apr. 29, 2024 executive
Product Information [Line Items]
Number of senior company executives appointed as Co-CEOs | executive						3
Film development costs, expense period (in years)			3 years
Allowance for credit losses			$ 125	$ 120
Provision for doubtful accounts			39	26	$ 40
Advertising expenses			$ 2,530	$ 2,900	$ 2,690
Stock Options and RSUs
Product Information [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares) | shares			28,000,000	19,000,000	11,000,000
Mandatory Convertible Preferred Stock
Product Information [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares) | shares	10,000,000			10,000,000	10,000,000
Internally-Produced Television and Film Programming
Product Information [Line Items]
Period revenue is earned (in years)			10 years
Internally-Produced Television and Film Programming, Still In Production
Product Information [Line Items]
Period revenue is earned (in years)			5 years
Feature Film
Product Information [Line Items]
Period revenue is earned (in years)			10 years
Television and Film Libraries, Acquired
Product Information [Line Items]
Period revenue is earned (in years)			20 years
Other current assets
Product Information [Line Items]
Production tax incentives receivable			$ 600
Other assets
Product Information [Line Items]
Production tax incentives receivable			1,300
Other current liabilities
Product Information [Line Items]
Reserves for sales returns and allowances			$ 17	$ 40
Mandatory Convertible Preferred Stock
Product Information [Line Items]
Preferred stock, percentage (in percent)			5.75%	5.75%
Maximum
Product Information [Line Items]
Finite-lived intangible asset useful life (in years)			40 years
Remaining lease term term (in years)			14 years
Lease renewal term (in years)			10 years
Maximum | Television Licensing
Product Information [Line Items]
Collection terms for agreements to license programming			5 years
Minimum
Product Information [Line Items]
Finite-lived intangible asset useful life (in years)			5 years
Minimum | Television Licensing
Product Information [Line Items]
Collection terms for agreements to license programming			1 year
Skydance Investor Group | Forecast
Product Information [Line Items]
Investment by certain affiliates of existing investors		$ 6,000
Investment by certain affiliates of existing investors, cash-stock election		4,500
Investment by certain affiliates of existing investors, cash		$ 1,500
Investment by certain affiliates of existing investors, subscription discount (in percent)		1.875%
Skydance Investor Group | Forecast | New Paramount Class B Common Stock
Product Information [Line Items]
Stock issuances (in shares) | shares		317,000,000
Share price (in dollars per share) | $ / shares		$ 15.00
Warrant issuance (in shares) | shares		200,000,000
Warrants price (in dollars per share) | $ / shares		$ 30.50
Warrant expiration period		5 years
Skydance Investor Group | Forecast | Maximum
Product Information [Line Items]
Potential remaining to be contributed		$ 1,500
Skydance Investor Group | Forecast | Maximum | New Paramount Class B Common Stock
Product Information [Line Items]
Stock issuances (in shares) | shares		400,000,000
Skydance Media, LLC | Forecast
Product Information [Line Items]
Termination fee		$ 400
Holders Of Paramount Class A Shares Other Than NAI Equity Investors | Forecast | New Paramount Class B Common Stock
Product Information [Line Items]
Stock conversion ratio (in shares) | shares		1.5333
Holders Of Paramount Class A Shares Other Than NAI Equity Investors | Forecast | Class A Common Stock
Product Information [Line Items]
Stock conversion price per share (in dollars per share) | $ / shares		$ 23.00
Holders Of Paramount Class B Shares Other Than NAI Equity Investors | Forecast | New Paramount Class B Common Stock
Product Information [Line Items]
Stock conversion ratio (in shares) | shares		1
Holders Of Paramount Class B Shares Other Than NAI Equity Investors | Forecast | Class B Common Stock
Product Information [Line Items]
Stock conversion price per share (in dollars per share) | $ / shares		$ 15.00
National Amusements, Inc. (“NAI”) | Forecast | New Paramount Class A Common Stock
Product Information [Line Items]
Ownership after transaction (in percent)		100.00%