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Basis Of Presentation (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Basis of Presentation [Line Items]          
Net Cash Provided by (Used in) Operating Activities     $ 55 $ (4,132)  
Cash, Cash Equivalents, and Short-term Investments $ 14,300   14,300   $ 16,200
Debt and Lease Obligation 57,200   57,200   58,100
Debt, Current 5,431   5,431   1,296
Increase/(Decrease) in revenue due to change in accounting estimate (1,319) $ (63) (2,204) 167  
Increase/(Decrease) in (Loss)/earnings from operations due to change in accounting estimate $ (2,424) $ (142) $ (3,965) $ (84)  
Change in Earnings Per Share Due to Change in Accounting Estimate $ (4.29) $ (0.10) $ (6.70) $ (0.05)  
Three Hundred And Sixty Four Day Revolving Credit Facility          
Basis of Presentation [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity $ 5,800   $ 5,800    
Senior Notes [Member] | 2022 | Fourth Quarter          
Basis of Presentation [Line Items]          
Long-term Debt, Current Maturities 300   300    
Senior Notes [Member] | 2023 | First Quarter          
Basis of Presentation [Line Items]          
Long-term Debt, Current Maturities 1,700   1,700    
Senior Notes [Member] | 2023 | Second Quarter          
Basis of Presentation [Line Items]          
Long-term Debt, Current Maturities 3,400   3,400    
Supply Chain Financing [Member]          
Basis of Presentation [Line Items]          
Accounts Payable, Trade 2,200   2,200   2,300
Revolving Credit Facility          
Basis of Presentation [Line Items]          
Debt Instrument, Unused Borrowing Capacity, Amount 12,000   12,000   $ 14,700
Line of Credit Facility, Maximum Borrowing Capacity $ 12,000   $ 12,000