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STOCKHOLDERS' EQUITY - Summary of Changes in Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance $ 21,064 $ 18,221
Net unrealized gain (loss) 10 76
Reclassifications to net income (20) 22
Other comprehensive income (loss) (10) 98
Ending balance 19,915 18,964
Total    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance 83 (60)
Other comprehensive income (loss) (10) 98
Ending balance 73 38
Foreign Currency Translation, Net of Tax    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance 13 51
Net unrealized gain (loss) 5 10
Reclassifications to net income 0 0
Other comprehensive income (loss) 5 10
Ending balance 18 61
Unrealized Gains and Losses on Available-for-Sale Debt Securities, Net of Tax    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance (4) 2
Net unrealized gain (loss) (19) (2)
Reclassifications to net income 0 0
Other comprehensive income (loss) (19) (2)
Ending balance (23) 0
Unrealized Gains and Losses on Cash Flow Hedges, Net of Tax    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Beginning balance 74 (113)
Net unrealized gain (loss) 24 68
Reclassifications to net income (20) 22
Other comprehensive income (loss) 4 90
Ending balance $ 78 $ (23)