Rendering

Component: (Network and Table)
Network
040301 - Disclosure - Accumulated Other Comprehensive Income (Details)
(http://att.com/role/AccumulatedOtherComprehensiveIncomeDetails)
TableAccumulated Other Comprehensive Income (Loss) [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000732717 (http://www.sec.gov/CIK)
Accumulated Other Comprehensive Income Loss [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Accumulated Other Comprehensive Income (Loss) [Axis]Accumulated Other Comprehensive Income (Loss) [Axis]Accumulated Other Comprehensive Income (Loss) [Axis]
Foreign Currency Translation Adjustment [Member]Net Unrealized Gains (Losses) on Available-for-Sale Securities [Member]Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]Defined Benefit Postretirement Plans [Member]Accumulated Other Comprehensive IncomeForeign Currency Translation Adjustment [Member]Net Unrealized Gains (Losses) on Available-for-Sale Securities [Member]Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]Defined Benefit Postretirement Plans [Member]Accumulated Other Comprehensive IncomeForeign Currency Translation Adjustment [Member]Net Unrealized Gains (Losses) on Available-for-Sale Securities [Member]Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]Defined Benefit Postretirement Plans [Member]Accumulated Other Comprehensive Income
Accumulated other comprehensive income, beginning balance
(1,198,000,000) 
484,000,000  
16,000,000  
6,032,000,000  
5,334,000,000  
(26,000,000) 
499,000,000  
741,000,000  
6,847,000,000  
8,061,000,000  
(367,000,000) 
450,000,000  
445,000,000  
7,352,000,000  
7,880,000,000  
Other comprehensive income (loss) before reclassification, net of tax
(797,000,000) 
58,000,000  
690,000,000  
497,000,000  
448,000,000  
(1,172,000,000) 
0  
(763,000,000) 
45,000,000  
(1,890,000,000) 
(75,000,000) 
65,000,000  
260,000,000  
428,000,000  
678,000,000  
Amounts reclassifed from accumulated OCI, net of tax
0 2
(1,000,000)2
38,000,000 1
(858,000,000)3
(821,000,000) 
0 2
(15,000,000)2
38,000,000 1
(860,000,000)3
(837,000,000) 
416,000,000 2
(16,000,000)2
36,000,000 1
(933,000,000)3
(497,000,000) 
Net other comprehensive income (loss), net of tax
(797,000,000) 
 
57,000,000  
 
728,000,000  
 
(361,000,000) 
 
(373,000,000) 
 
(1,172,000,000) 
 
(15,000,000) 
 
(725,000,000) 
 
(815,000,000) 
 
(2,727,000,000) 
 
341,000,000  
 
49,000,000  
 
296,000,000  
 
(505,000,000) 
 
181,000,000  
 
Accumulated other comprehensive income, ending balance
(1,995,000,000) 
 
541,000,000  
 
744,000,000  
 
5,671,000,000  
 
4,961,000,000  
 
(1,198,000,000) 
 
484,000,000  
 
16,000,000  
 
6,032,000,000  
 
5,334,000,000  
 
(26,000,000) 
 
499,000,000  
 
741,000,000  
 
6,847,000,000  
 
8,061,000,000  
 
1: (Gains) losses are included in interest expense in the consolidated statements of income. See Note 10 for additional information.
2: (Gains) losses are included in Other income (expense) - net in the consolidated statements of income.
3: The amortization of prior service credits associated with postretirement benefits, net of amounts capitalized as part of construction labor, are included in Cost of services and sales and Selling, general and administrative in the consolidated statements of income (see Note 12).