(Loss)/Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
Schedule of computation of basic and diluted (loss) earnings per share The following table shows the computation of basic and diluted (loss)/earnings per share:
Three Months Ended September 30,
Nine Months Ended September 30,
(in millions, except per share data)2020201920202019
Net (loss)/income$(5,379)$1,495 $(11,630)$3,669 
Basic weighted average shares outstanding635 646 636 654 
Dilutive effect of share-based awards— 2 — 2 
Diluted weighted average shares outstanding635 648 636 656 
Basic (loss)/earnings per share$(8.47)$2.32 $(18.30)$5.61 
Diluted (loss)/earnings per share$(8.47)$2.31 $(18.30)$5.59