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Debt and Reedemable Preferred Securities of Subsidiaries (Tables)
12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Long-term debt
Long-term debt is composed of the following:
Weighted-
Average
Interest
Rate
MaturitiesDecember 31
20202019
Notes and debentures3.3%2021 - 2050$7,897 $6,749 
Industrial development revenue bonds0.6%2023 - 2045169 169 
Bank loans and other financings in various currencies6.3%2021 - 203975 54 
Total long-term debt8,141 6,972 
Less current portion263 759 
Long-term portion$7,878 $6,213