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Estimates, Significant Accounting Policies and Balance Sheet Detail Estimates (Schedule of Accounting Change) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
 [2]
Jun. 30, 2016
 [2]
Mar. 31, 2016
 [2]
Dec. 31, 2015
Sep. 30, 2015
 [2]
Jun. 30, 2015
 [2]
Mar. 31, 2015
 [2]
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]                      
Cost of products sold                 $ 30,966 $ 23,693 [1] $ 28,668 [1]
Operating income (loss) $ 285 $ 924 $ 746 $ 758 $ (275) [2] $ 624 $ 814 $ 680 2,713 1,843 [1],[2] 2,287 [1]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest                 710 204 [1] 900 [1]
Net income $ 1,168 $ 758 $ 121 $ 319 $ (734) [2] $ (3) $ 417 $ 320 2,366 0 [1],[2] 1,061 [1]
Inventory valuation adjustments                 (24) (97) [1] 67 [1]
Income tax benefit from continuing operations                 (1,833) (258) [1] (123) [1]
Net Income (Loss) Attributable to Parent                 954 995 [1] 1,189 [1]
Less: Net income (loss) attributable to noncontrolling interest                 $ 1,412 $ (995) [1] $ (128) [1]
Basic $ 0.22 $ 0.22 $ 0.18 $ 0.22 $ 0.22 [2] $ 0.20 $ 0.23 $ 0.30 $ 0.85 $ 0.94 [1],[2] $ 1.11 [1]
Diluted $ 0.22 $ 0.22 $ 0.18 $ 0.21 $ 0.21 [2] $ 0.19 $ 0.23 $ 0.30 $ 0.83 $ 0.92 [1],[2] $ 1.11 [1]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest                 $ 2,361 $ 4 $ 1,121
Comprehensive Income (Loss), Net of Tax, Attributable to Parent                 954 995 1,189
Deferred income taxes                 (1,871) (177) [1] 239 [1]
Increase (Decrease) in Operating Capital                 (192) (179) [1] (872) [1]
Inventories $ 2,055 [1]       $ 1,453       2,022 2,055 [1] 1,453
Deferred income taxes 5,112 [1]               3,315 5,112 [1]  
Total partners’ deficit (1,694) [1]       24,485       (1,196) (1,694) [1] 24,485
Noncontrolling interest 24,125 [1]               $ 31,176 24,125 [1]  
Scenario, Previously Reported [Member]                      
Error Corrections and Prior Period Adjustments Restatement [Line Items]                      
Cost of products sold [3]                   23,652 28,636
Operating income (loss) [3]                   1,884 2,319
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest [3]                   245 932
Net income [3]                   41 1,093
Inventory valuation adjustments [3]                   (267) 229
Net Income (Loss) Attributable to Parent                   (954) [3] (96)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [3]                   45 1,153
Increase (Decrease) in Operating Capital [3]                   50 1,066
Inventories [3] 2,141       1,498         2,141 1,498
Total partners’ deficit 24,211 [3]       24,530         24,211 [3] 24,530
Restatement Adjustment [Member]                      
Error Corrections and Prior Period Adjustments Restatement [Line Items]                      
Cost of products sold                   41 32
Operating income (loss)                   (41) (32)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest                   (41) (32)
Net income                   (41) (32)
Inventory valuation adjustments                   170 (162)
Net Income (Loss) Attributable to Parent                   (41) (32)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest                   (41) (32)
Increase (Decrease) in Operating Capital                   129 (194)
Inventories (86)       (45)         (86) (45)
Total partners’ deficit $ (86)       $ (45)         $ (86) $ (45)
[1] * As adjusted. See Note 2.
[2] * As adjusted. See Note 2 and Note 3.
[3] * Amounts reflect certain reclassifications made to conform to the current year presentation and include the impact of discontinued operations as discussed in Note 3.