v3.19.3.a.u2
Supplemental Financial Statement Information (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Revenues $ 161,857 $ 136,819 $ 110,855
Other income (expense), net 5,394 7,389 1,015
Benefit (provision) for income taxes (5,282) (4,177) (14,531)
Net of tax 34,343 30,736 12,662
Reclassification out of AOCI      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Net of tax 410 813 (198)
Reclassification out of AOCI | Unrealized gains (losses) on available-for-sale investments      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other income (expense), net 149 1,190 (105)
Benefit (provision) for income taxes (38) (279) 0
Net of tax 111 911 (105)
Reclassification out of AOCI | Unrealized Gains (Losses) on Cash Flow Hedges      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Benefit (provision) for income taxes (74) 35 71
Net of tax 299 (98) (93)
Reclassification out of AOCI | Unrealized Gains (Losses) on Cash Flow Hedges | Foreign exchange contracts      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Revenues 367 (139) (169)
Reclassification out of AOCI | Unrealized Gains (Losses) on Cash Flow Hedges | Interest rate contracts      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other income (expense), net $ 6 $ 6 $ 5