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Description of Business and Summary of Significant Accounting Policies - Subscriber System Assets and Depreciation Amortization (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accounting Policies [Abstract] |  |  |
Gross carrying amount | $ 6,404,479 | $ 5,981,008 |
Accumulated depreciation | (3,398,543) | (3,062,468) |
Subscriber system assets, net | 3,005,936 | 2,918,540 |
Depreciation of subscriber system assets | 545,041 | 531,013 | $ 488,557
Amortization of deferred subscriber acquisition costs | $ 188,222 | $ 154,186 | $ 118,162

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- Definition Aggregate accumulated depreciation of long-lived security system assets. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Subscriber System Assets, Amortization Expense + References No definition available. + Details
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Namespace Prefix: | adt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Subscriber System Assets, Depreciation Expense + References No definition available. + Details
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Namespace Prefix: | adt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Gross amount of long-lived, company owned, security system assets. + References No definition available. + Details
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Namespace Prefix: | adt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Subscriber System Assets Net + References No definition available. + Details
Name: | adt_SubscriberSystemAssetsNet
Namespace Prefix: | adt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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