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Investments & Sundry Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Investments & Sundry Assets    
Derivatives - noncurrent $ 151 $ 94
Alliance investments - equity method 172 184
Alliance investments - non-equity method 54 38
Long-term deposits 239 242
Other receivables 423 276
Employee benefit-related 238 253
Prepaid income taxes 777 664
Other assets 227 321
Total $ 2,282 $ 2,074