Benefit Plans - Share Based Payment Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment expense	$ 50	$ 48
Programming and content
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment expense	9	9
Customer service and billing
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment expense	1	1
Transmission
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment expense	2	1
Sales and marketing
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment expense	14	12
Product and technology
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment expense	10	12
General and administrative
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment expense	$ 14	$ 13