v3.20.2
Segment Information (Reconciliation Of Operating Income Loss to Consolidated Statement Of Income) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income $ 3,532 $ 7,500 $ 11,018 $ 14,733
Interest expense 2,041 2,149 4,059 4,290
Equity in net income (loss) of affiliates (10) 40 (16) 33
Other income (expense) - net 1,017 (318) 1,820 (32)
Income Before Income Taxes 2,498 5,073 8,763 10,444
Operating Segments [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income 9,816 10,745 19,829 21,079
Equity in net income (loss) of affiliates 12 67 31 134
Income Before Income Taxes 9,828 10,812 19,860 21,213
Operating Segments [Member] | Communications [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income 8,112 8,671 16,315 16,682
Equity in net income (loss) of affiliates 0 0 0 0
Income Before Income Taxes 8,112 8,671 16,315 16,682
Operating Segments [Member] | WarnerMedia [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income 1,913 2,295 3,911 4,791
Equity in net income (loss) of affiliates 4 55 19 122
Income Before Income Taxes 1,917 2,350 3,930 4,913
Operating Segments [Member] | Latin America [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income (209) (221) (397) (394)
Equity in net income (loss) of affiliates 8 12 12 12
Income Before Income Taxes (201) (209) (385) (382)
Certain Significant Items [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income (3,084) (94) (2,426) (342)
Certain Significant Items [Member] | Corporate and Other [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income (589) (485) (1,162) (917)
Certain Significant Items [Member] | Merger and intergration items [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income (211) (346) (393) (461)
Certain Significant Items [Member] | Amortization of intangibles acquired [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income (2,145) (1,960) (4,201) (3,948)
Certain Significant Items [Member] | Impairments [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income (2,319) 0 (2,442) 0
Certain Significant Items [Member] | Gain on spectrum transactions [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income [1] 0 0 900 0
Certain Significant Items [Member] | Employee separate costs and benefit-related losses [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income (765) (94) (884) (342)
Certain Significant Items [Member] | Segment equity in net (income) loss of affiliates        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income (12) (67) (31) (134)
Consolidations [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income (589) (485) (1,162) (917)
Eliminations and consolidations [Member]        
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]        
AT&T Operating Income $ (255) $ (360) $ (629) $ (678)
[1] Included as a reduction of "Selling, general and administrative expenses" in the consolidated statement of income.