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Debt and Redeemable Preferred Securities of Subsidiaries (Long-Term Debt) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Instrument |  |
Total Long-term debt | $ 8,141 | $ 6,972
Less current portion | 263 | 759
Long-term portion | $ 7,878 | 6,213
Notes and debentures |  |
Debt Instrument |  |
Weighted- Average Interest Rate | 3.30% |
Total Long-term debt | $ 7,897 | 6,749
Industrial development revenue bonds |  |
Debt Instrument |  |
Weighted- Average Interest Rate | 0.60% |
Total Long-term debt | $ 169 | 169
Bank loans and other financings In various currencies |  |
Debt Instrument |  |
Weighted- Average Interest Rate | 6.30% |
Total Long-term debt | $ 75 | $ 54

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