v3.7.0.1
Reconciliation of Total Reportable Segments Operating Income to Consolidated Income before Provision for Income Taxes (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Segment Reporting Information [Line Items]        
Severance, pension and benefit charges (Note 8) $ (607) $ (3,550) $ (607) $ (3,715)
Net gain on sale of divested businesses (Note 2) 1,774 1,007 1,774 1,007
Acquisition and integration related charges (Note 2) (152)   (152)  
Operating income 8,232 4,554 15,413 12,496
Equity in losses of unconsolidated businesses (28) (20) (49) (40)
Other expense, net (19) (1,826) (865) (1,794)
Interest expense (1,218) (1,013) (2,350) (2,201)
Income Before Provision For Income Taxes 6,967 1,695 12,149 8,461
Advanced Wireless Services Spectrum Licenses        
Segment Reporting Information [Line Items]        
Gain on spectrum license transaction (Note 2)     126 142
Operating Segments        
Segment Reporting Information [Line Items]        
Operating income 7,478 7,493 14,773 15,244
Corporate and Other        
Segment Reporting Information [Line Items]        
Operating income (285) (457) (599) (966)
Operating Income Generated By Assets Sold        
Segment Reporting Information [Line Items]        
Operating income $ 24 $ 61 $ 98 $ 784