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Long-Term Debt (Tables)
12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Long-term debt outstanding The company’s long-term debt outstanding at year-end 2020 and 2019 was as follows:
At December 31
20202019
Weighted Average Interest Rate (%)1
Range of Interest Rates (%)2
PrincipalPrincipal
Notes due 20212.100$1,350 $1,350 
Floating rate notes due 20210.913
0.751 - 1.171
650 650 
Debentures due 20218.87540 40 
Notes due 20222.179
0.333 - 2.498
3,800 3,400 
Floating rate notes due 20220.594
0.324 - 0.762
1,000 650 
Notes due 20232.377
0.426 - 7.250
4,800 3,000 
Floating rate notes due 20230.676
0.414 - 1.114
800 — 
Notes due 20243.291
2.895 - 3.900
1,650 1,000 
Notes due 20251.724
0.687 - 3.326
4,000 750 
Notes due 20262.9542,250 2,250 
Notes due 20272.379
1.018 - 8.000
2,000 — 
Notes due 20283.850600 — 
Notes due 20293.250500 — 
Notes due 20302.2361,500 — 
Debentures due 20318.625108 108 
Debentures due 20328.414
8.000 - 8.625
222 222 
Notes due 20402.978500 — 
Notes due 20416.000850 — 
Notes due 20435.2501,000 — 
Notes due 20445.050850 — 
Notes due 20474.950500 — 
Notes due 20494.200500 — 
Notes due 20502.763
2.343 - 3.078
1,750 — 
Debentures due 20977.25084 — 
Bank loans due 2021 - 20231.530
1.240 - 2.004
1,948 — 
3.400% loan3
3.400218 218 
Medium-term notes, maturing from 2021 to 20386.131
0.000 - 8.875
37 38 
Notes due 2020 5,054 
Total including debt due within one year33,507 18,730 
Debt due within one year(2,600)(5,054)
Fair market valuation adjustment of Noble long-term debt1,690 — 
Reclassified from short-term debt9,825 9,750 
Unamortized discounts and debt issuance costs(102)(17)
Finance lease liabilities4
447 282 
Total long-term debt$42,767 $23,691 
1 Weighted-average interest rate at December 31, 2020
2 Range of interest rates at December 31, 2020.
3 Maturity date is conditional upon the occurrence of certain events. 2022 is the earliest period in which the loan may become payable
4 For details on finance lease liabilities, see Note 5 beginning on page 69