v3.5.0.1

Segment Data (Schedule of Segment Reporting Data) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2016 | Mar. 27, 2015 | Mar. 31, 2016 | Mar. 27, 2015
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 899 | $ 890 | $ 1,799 | $ 1,777
Adjusted EBITDA | 468 | 444 | 925 | 897
Depreciation and Amortization | 332 | 313 | 659 | 622
United States Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 837 | 820 | 1,673 | 1,631
Adjusted EBITDA | 442 | 412 | 871 | 834
Depreciation and Amortization | 311 | 291 | 617 | 576
Canada Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 62 | 70 | 126 | 146
Adjusted EBITDA | 26 | 32 | 54 | 63
Depreciation and Amortization | $ 21 | $ 22 | $ 42 | $ 46

X
- Definition Amount of profit before interest, taxes and certain non-cash items which include depreciation of subscriber system assets and other fixed assets, amortization of deferred costs and deferred revenue associated with customer acquisitions, and amortization of dealer and other intangible assets. Adjusted EBITDA is also adjusted to exclude charges and gains related to acquisitions, restructurings, impairments, and other income or charges. + References No definition available. + Details
Name: | adt_AdjustedEBITDA
Namespace Prefix: | adt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of depreciation and intangible asset amortization as well as amortization of deferred subscriber acquisition costs. + References No definition available. + Details
Name: | adt_DepreciationAmortizationandOther
Namespace Prefix: | adt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=adt_UnitedStatesSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=adt_CanadaSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |