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Other Income/(Loss) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Net periodic pension and OPEB income/(cost), excluding service cost $ 429 $ 389 $ 906 $ 779
Investment-related interest income 167 109 313 201
Unrecognized Tax Benefits Interest Income 32 0 33 1
Gain/(Loss) on Investment 217 (24) 212 27
Gains/(Losses) on changes in investments in affiliates 0 (1) 58 (2)
Royalty Income, Nonoperating 129 150 272 304
Other 30 109 73 156
Total $ 1,004 $ 732 $ 1,867 $ 1,466