Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Sep. 30, 2024 |
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| Goodwill [Line Items] | |||||
| Goodwill | $ 16,709 | $ 16,709 | $ 16,725 | ||
| Amortization of intangible assets | 110 | $ 116 | 342 | $ 357 | |
| ADT Mexico Business | |||||
| Goodwill [Line Items] | |||||
| Goodwill | $ 174 | $ 174 | |||
| ADT Mexico Business | Measurement Input, Discount Rate | |||||
| Goodwill [Line Items] | |||||
| Percentage change in fair value input that would cause the fair value to be less than the carrying value | 0.50% | 0.50% | |||
| ADT Mexico Business | Measurement Input, Long-Term Revenue Growth Rate | |||||
| Goodwill [Line Items] | |||||
| Percentage change in fair value input that would cause the fair value to be less than the carrying value | 1.00% | 1.00% | |||
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- Definition Reporting Unit, Percentage Change In Fair Value Input That Would Cause The Fair Value To Be Less Than The Carrying Value No definition available.
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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