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Stockholders' Equity - Schedule of Changes in Stockholders' Equity (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance $ 4,795 $ 4,210
Comprehensive income    
Net earnings 440 149
Other comprehensive income 124 (95)
Comprehensive income 564 54
Stock issued (repurchased) (141) (115)
Dividends declared (79) (75)
Ending balance 5,139 4,074
Retained Earnings    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 8,725 7,962
Comprehensive income    
Net earnings 433 154
Comprehensive income 433 154
Dividends declared (79) (75)
Ending balance 9,079 8,041
Accumulated Other Comprehensive Income (Loss)    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance (2,811) (2,618)
Comprehensive income    
Other comprehensive income 124 (97)
Comprehensive income 124 (97)
Ending balance (2,687) (2,715)
Treasury Stock / Additional Paid-In-Capital    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance (2,142) (2,169)
Comprehensive income    
Stock issued (repurchased) (141) (115)
Ending balance (2,283) (2,284)
Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 113 112
Comprehensive income    
Ending balance 113 112
Non-Controling Interest    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 910 923
Comprehensive income    
Net earnings 7 (5)
Other comprehensive income 0 2
Comprehensive income 7 (3)
Ending balance $ 917 $ 920