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Consolidated Statements of Equity - USD ($)
$ in Millions
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2017 $ 5,467 $ 1,157 $ 2,718 $ (132) $ 973 $ 688 $ 63
Repurchase of common stock (62)     (62)      
Stock-based compensation expense 125   125 53 (53)    
Comprehensive income (loss):              
Net income 1,293       1,287   6
Other comprehensive income (loss), net of tax (179)         (179)  
Comprehensive income (loss) 1,114            
Dividends to noncontrolling interest (4)           (4)
Dividends (216)       (216)    
Ending Balance at Dec. 31, 2018 6,424 1,157 2,843 (141) 1,991 509 65
Contribution of noncontrolling interest 8           8
Business combination 61           61
Repurchase of noncontrolling interest (61)   4       (65)
Repurchase of common stock (250)     (250)      
Stock-based compensation expense 145   145 63 (63)    
Comprehensive income (loss):              
Net income 1,033       1,032   1
Other comprehensive income (loss), net of tax (34)         (34)  
Comprehensive income (loss) 999            
Dividends to noncontrolling interest (2)           (2)
Dividends (213)       (213)    
Ending Balance at Dec. 31, 2019 7,111 1,157 2,992 (328) 2,747 475 68
Repurchase of common stock (125)     (125)      
Issuance of senior convertible bonds 184   184        
Settlement of senior convertible bonds (11)   (269) 258      
Stock-based compensation expense 155   155 102 (102)    
Comprehensive income (loss):              
Net income 1,108       1,106   2
Other comprehensive income (loss), net of tax 248         248  
Comprehensive income (loss) 1,356            
Dividends to noncontrolling interest (12)           (12)
Dividends (152)       (152)    
Ending Balance at Dec. 31, 2020 $ 8,506 $ 1,157 $ 3,062 $ (93) $ 3,599 $ 723 $ 58