Goodwill, Customer Relationships and Other Intangible Assets - Additional Information (Details)			3 Months Ended		6 Months Ended
	May 21, 2025 USD ($) reporting_unit	Apr. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) segment	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Goodwill [Line Items]
Intangible assets, gross (including goodwill)			$ 13,100,000,000		$ 13,100,000,000		$ 15,400,000,000
Number of reportable segments | segment					2
Number of reporting units | reporting_unit	3
Goodwill impairment	$ 0	$ 0	$ 628,000,000	$ 0	$ 628,000,000	$ 0
Control premium (as a percent)		42.00%	4.00%		4.00%
Amortization of intangible assets			$ 248,000,000	$ 277,000,000	$ 500,000,000	$ 549,000,000
Mass Market Reporting Unit
Goodwill [Line Items]
Goodwill impairment			$ 628,000,000		$ 628,000,000
Minimum | Measurement Input, Revenue Multiple
Goodwill [Line Items]
Goodwill impairment, measurement input		1.8
Minimum | Measurement Input, EBITDA Multiple
Goodwill [Line Items]
Goodwill impairment, measurement input		5.8
Maximum | Measurement Input, Revenue Multiple
Goodwill [Line Items]
Goodwill impairment, measurement input		3.1
Maximum | Measurement Input, EBITDA Multiple
Goodwill [Line Items]
Goodwill impairment, measurement input		8.0