v3.4.0.3
Acquisitions and Divestitures - Additional Information (Detail)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Feb. 20, 2016
USD ($)
Jun. 23, 2015
USD ($)
shares
Feb. 05, 2015
USD ($)
Mar. 31, 2016
USD ($)
Customer
Unit
Mar. 31, 2015
USD ($)
May. 12, 2015
$ / shares
Business Acquisition [Line Items]            
Pre-tax gain on sale of wireless licenses       $ 142    
Payments to acquire businesses, net of cash acquired       $ 161 $ 2  
Access Line Sale with Frontier            
Business Acquisition [Line Items]            
Proceeds from dispositions of businesses     $ 10,500      
Net consideration from disposition of businesses     7,500      
Debt assumed by Frontier     $ 600      
Number of FiOS Internet subscribers to be divested | Customer       1,600,000    
Number of voice connections to be divested | Unit       3,300,000    
Number of FiOS Video subscribers to be divested | Customer       1,200,000    
Advanced Wireless Services Spectrum Licenses            
Business Acquisition [Line Items]            
Pre-tax gain on sale of wireless licenses       $ 100    
Acquisitions       400    
AOL Inc            
Business Acquisition [Line Items]            
Business acquisition, share price | $ / shares           $ 50.00
Business acquisition, purchase price in cash   $ 3,764   $ 126    
Number of shares exercised under appraisal rights of Delaware law | shares   6.6        
Business acquisition, potential additional payment   $ 330        
Cash acquired   $ 500        
XO Holdings            
Business Acquisition [Line Items]            
Payments to acquire businesses, net of cash acquired $ 1,800