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Goodwill, Customer Relationships and Other Intangible Assets - Additional Information (Details)			3 Months Ended			9 Months Ended
	Sep. 30, 2025 USD ($) reporting_unit	Apr. 30, 2025 USD ($)	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) segment	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Goodwill [Line Items]
Intangible assets, gross (including goodwill)	$ 13,200,000,000		$ 13,200,000,000			$ 13,200,000,000		$ 15,400,000,000
Number of reportable segments | segment						2
Number of reporting units | reporting_unit	3
Goodwill impairment	$ 0	$ 0	0		$ 0	$ 628,000,000	$ 0
Control premium (as a percent)		42.00%		4.00%
Amortization of intangible assets			$ 251,000,000		$ 253,000,000	$ 751,000,000	$ 802,000,000
Mass Market Reporting Unit
Goodwill [Line Items]
Goodwill impairment				$ 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

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