Quarterly report pursuant to Section 13 or 15(d)

Contract Liabilities (Details)

v3.8.0.1
Contract Liabilities (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Deferred Revenue Arrangement [Line Items]    
Contract with Customer, Liability $ 2,838 $ 300
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price 2,692  
Contract with Customer, Asset, Gross $ 5,300  
Percent of contract liabilities to be realized in the future 5.00%  
Up-front Payment Arrangement [Member]    
Deferred Revenue Arrangement [Line Items]    
Contract with Customer, Liability $ 2,723 105
Contract with Customer, Liability, Revenue Recognized (74)  
Software Service, Support and Maintenance Arrangement [Member]    
Deferred Revenue Arrangement [Line Items]    
Contract with Customer, Liability 115 $ 195
Accounting Standards Update 2014-09 [Member] | Restatement Adjustment [Member]    
Deferred Revenue Arrangement [Line Items]    
Customer Advances and Deposits $ 1,019