v3.3.1.900
Disclosures About Segments And Related Information (Schedule Of Geographic Sales And Other Operating Revenue) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Revenue Reconciling Item [Line Items]      
Sales and other operating revenue [1] $ 259,488 $ 394,105 $ 420,836
Sales-based taxes [2] 22,678 29,342 30,589
U.S. [Member]      
Segment Reporting Revenue Reconciling Item [Line Items]      
Sales and other operating revenue [1] 92,184 148,713 152,820
Sales-based taxes 6,402 6,310 5,992
Non-U.S. [Member]      
Segment Reporting Revenue Reconciling Item [Line Items]      
Sales and other operating revenue [1] 167,304 245,392 268,016
Sales-based taxes 16,276 23,032 24,597
United Kingdom [Member]      
Segment Reporting Revenue Reconciling Item [Line Items]      
Sales and other operating revenue [1] 23,651 31,346 34,061
Canada [Member]      
Segment Reporting Revenue Reconciling Item [Line Items]      
Sales and other operating revenue [1] 22,876 36,072 35,924
Italy [Member]      
Segment Reporting Revenue Reconciling Item [Line Items]      
Sales and other operating revenue [1] 13,795 18,880 19,273
Belgium [Member]      
Segment Reporting Revenue Reconciling Item [Line Items]      
Sales and other operating revenue [1] 13,154 20,953 20,973
France [Member]      
Segment Reporting Revenue Reconciling Item [Line Items]      
Sales and other operating revenue [1] 11,808 17,639 18,444
Singapore [Member]      
Segment Reporting Revenue Reconciling Item [Line Items]      
Sales and other operating revenue [1] 10,790 15,407 15,623
Germany [Member]      
Segment Reporting Revenue Reconciling Item [Line Items]      
Sales and other operating revenue [1] $ 10,045 $ 14,816 $ 15,701
[1] Sales and other operating revenue includes sales-based taxes of $22,678 million for 2015, $29,342 million for 2014 and $30,589 million for 2013. See Note 1, Summary of Accounting Policies.
[2] Sales and other operating revenue includes sales-based taxes of $22,678 million for 2015, $29,342 million for 2014 and $30,589 million for 2013.