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| Entity Registrant Name | AT&T Inc. |
| CIK | 0000732717 |
| Accession number | 0000732717-14-000010 |
| Link to XBRL instance | http://www.sec.gov/Archives/edgar/data/732717/000073271714000010/t-20131231.xml |
| Fiscal year end | --12-31 |
| Fiscal year focus | 2013 |
| Fiscal period focus | FY |
| Current balance sheet date | 2013-12-31 |
| Current year-to-date income statement start date | 2013-01-01 |
| Commentary | All information interpreted as expected. |
| Level 3 (Disclosure) Text Block concept | us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock |
NOTE 6. PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment is summarized as follows at December 31:
Our depreciation expense was $17,722 in 2013, $16,933 in 2012 and $16,368 in 2011. Depreciation expense included amortization of software totaling $2,142 in 2013, $2,130 in 2012 and $2,243 in 2011.
Certain facilities and equipment used in operations are leased under operating or capital leases. Rental expenses under operating leases were $3,683 for 2013, $3,507 for 2012, and $3,414 for 2011. At December 31, 2013, the future minimum rental payments under noncancelable operating leases for the years 2014 through 2018 were $3,003, $2,857, $2,694, $2,458, and $2,233, with $11,707 due thereafter. Certain real estate operating leases contain renewal options that may be exercised. Capital leases are not significant. |
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Level 4 Details Key Concepts: Long-term Debt Maturities
| Description | Fact value | US GAAP XBRL Concept |
|---|---|---|
| PPE, Gross | 274,798,000,000 | us-gaap:PropertyPlantAndEquipmentGross |
| Accumulated depreciation | 163,830,000,000 | us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment |
| PPE, Net | 110,968,000,000 | us-gaap:PropertyPlantAndEquipmentNet |
| CHECK | 0 |
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