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Investments & Sundry Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Investments & Sundry Assets    
Derivatives - noncurrent $ 40 $ 151
Alliance investments - equity method 159 170
Alliance investments - non-equity method 47 46
Long-term deposits 205 231
Other receivables 181 423
Employee benefit-related 210 237
Prepaid income taxes 743 777
Other assets 237 153
Total $ 1,823 $ 2,187