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Earnings per Share (Unaudited) Earnings per Share (Tables)
3 Months Ended
Mar. 31, 2022
Earnings Per Share [Abstract]  
Reconciliation of net income (loss) and weighted-average shares of common stock outstanding
Reconciliations of net income and weighted-average shares of common stock outstanding for purposes of calculating basic and diluted net income per share follow (in millions, except per share amounts):
Three Months Ended
March 31,
 20222021
Net income$1,904 $953 
Net income attributable to noncontrolling interests(377)(235)
Undistributed earnings allocated to participating securities(5)(4)
Net income attributable to common stockholders$1,522 $714 
Basic weighted-average shares of common stock outstanding
1,455 1,462 
Add shares issuable upon exercise or vesting of dilutive stock options and restricted stock units (RSUs)14 15 
Diluted weighted-average shares of common stock outstanding
1,469 1,477 
Basic net income per share attributable to common stockholders$1.05 $0.49 
Diluted net income per share attributable to common stockholders$1.04 $0.48