XML 54 R43.htm IDEA: XBRL DOCUMENT v3.21.2
Revenue - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]          
Adjustment to sales incentives $ 350 $ 470      
Contract liabilities 2,500   $ 2,500   $ 2,400
Deferred revenue recognized 294 $ 241 689 $ 627  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Deferred revenue expected to be recognized $ 745   $ 745    
Expected timing of performance obligation 6 months   6 months    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Deferred revenue expected to be recognized $ 738   $ 738    
Expected timing of performance obligation 1 year   1 year    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Deferred revenue expected to be recognized $ 433   $ 433    
Expected timing of performance obligation 1 year   1 year    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Deferred revenue expected to be recognized $ 598   $ 598    
Expected timing of performance obligation