v3.19.3.a.u2
Acquisitions, Dispositions And Other Adjustments (Time Warner, Otter and AppNexus Acquisitions Narrative) (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 7 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2019
Sep. 30, 2019
[1]
Jun. 30, 2019
[1]
Mar. 31, 2019
[1]
Dec. 31, 2018
Sep. 30, 2018
[1]
Jun. 30, 2018
[1]
Mar. 31, 2018
[1]
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jun. 14, 2018
Business Acquisition [Line Items]                                  
Advances, Investments In, Collections, and Payments From Affiliates                           $ 365 $ 1,050 $ 0  
Goodwill   $ 146,241       $ 146,370             $ 146,370 146,241 146,370 105,449  
Acquisition of business - purchase price (in millions)                           1,809 43,309 (1,123)  
Revenues   46,821 [1],[2] $ 44,588 $ 44,957 $ 44,827 47,993 [1] $ 45,739 $ 38,986 $ 38,038 $ 45,739 $ 38,986 $ 38,038   181,193 170,756 160,546  
Operating Income (Loss)   5,321 [1],[2] $ 7,901 $ 7,500 $ 7,233 6,160 [1] $ 7,269 $ 6,466 $ 6,201 $ 7,269 $ 6,466 $ 6,201   27,955 26,096 19,970  
Amortization expense                           7,932 8,347 4,626  
WarnerMedia [Member]                                  
Business Acquisition [Line Items]                                  
Goodwill   40,879       40,698             40,698 40,879 40,698 0  
Xandr [Member]                                  
Business Acquisition [Line Items]                                  
Goodwill   $ 1,466       1,403             1,403 $ 1,466 $ 1,403 $ 0  
Time Warner Inc. [Member]                                  
Business Acquisition [Line Items]                                  
Acquisition of business - acquisition period Jun. 14, 2018                           Jun. 14, 2018    
Goodwill                                 $ 38,801
Acquisition of business - purchase price (in millions) $ 79,358                                
Time Warner Inc. [Member] | Cash [Member]                                  
Business Acquisition [Line Items]                                  
Acquisition of business - purchase price (in millions) 42,100                                
Time Warner Inc. [Member] | Common Stock [Member]                                  
Business Acquisition [Line Items]                                  
Acquisition of business - purchase price (in millions) $ 36,599                                
Time Warner Inc. [Member] | Acquisition [Member]                                  
Business Acquisition [Line Items]                                  
Revenues                         18,209        
Operating Income (Loss)                         1,400        
Amortization expense                         3,296        
Otter Media [Member] | WarnerMedia [Member]                                  
Business Acquisition [Line Items]                                  
Acquisition of business - acquisition period                             Aug. 07, 2018    
Advances, Investments In, Collections, and Payments From Affiliates                             $ 1,480    
Acquisition of business - Equity Interest in Acquiree Remeasurement Gain                             395    
Goodwill           1,239             1,239   1,239    
Acquisition of business - purchase price (in millions)                             $ 157    
AppNexus [Member] | Xandr [Member]                                  
Business Acquisition [Line Items]                                  
Acquisition of business - acquisition period                             Aug. 15, 2018    
Goodwill           $ 1,220             $ 1,220   $ 1,220    
Acquisition of business - purchase price (in millions)                             $ 1,432    
[1] Includes actuarial gains and losses on pension and postretirement benefit plans (Note 15).
[2] Includes an asset abandonment charge (Note 7).