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Goodwill, Customer Relationships and Other Intangible Assets - Additional Information (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) reporting_unit segment | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($)
Goodwill [Roll Forward] |  |  |  |  |
Intangible assets, gross (including goodwill) | $ 15,400,000,000 |  | $ 15,400,000,000 |  |
Number of reportable segments | segment |  |  | 2 |  |
Goodwill | 1,964,000,000 |  | $ 1,964,000,000 |  | $ 1,964,000,000
Accumulated impairment losses | 21,700,000,000 |  | $ 21,700,000,000 |  | 21,700,000,000
Number of reporting units | reporting_unit |  |  | 3 |  |
Goodwill impairment | 0 | $ 8,793,000,000 | $ 0 | $ 8,793,000,000 |
Amortization of intangible assets | 277,000,000 | $ 263,000,000 | 549,000,000 | $ 523,000,000 |
Minimum | Revenue Multiple |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill impairment, measurement input |  | 1.5 |  | 1.5 |
Minimum | EBITDA Multiple |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill impairment, measurement input |  | 4.6 |  | 4.6 |
Maximum | Revenue Multiple |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill impairment, measurement input |  | 4.3 |  | 4.3 |
Maximum | EBITDA Multiple |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill impairment, measurement input |  | 10.5 |  | 10.5 |
Business |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill | 0 |  | 0 |  | 0
Mass Markets |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill | $ 2,000,000,000 |  | $ 2,000,000,000 |  | $ 2,000,000,000

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