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Miscellaneous Financial Information (Tables)
12 Months Ended
Dec. 31, 2015
Miscellaneous Financial Information [Abstract]  
Crude Oil, Products And Merchandise
2015 2014
(billions of dollars)
Crude oil4.2 4.6
Petroleum products4.1 4.1
Chemical products2.7 2.9
Gas/other1.0 0.8
Total12.0 12.4