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Summary of Significant Accounting Policies Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Significant Accounting Policies [Line Items]
Cash held at consolidated affiliated partnerships and restricted cash	$ 804	$ 1,282
Debt	11,119	12,594
Fair value of long-term debt	11,200	12,200
Restricted cash
Schedule of Significant Accounting Policies [Line Items]
Cash held at consolidated affiliated partnerships and restricted cash	686	966
Automotive Segment
Schedule of Significant Accounting Policies [Line Items]
Cash held at consolidated affiliated partnerships and restricted cash	2	0
Debt	3,259	3,135
Research and development expense	192	189	$ 192
Energy Segment
Schedule of Significant Accounting Policies [Line Items]
Cash held at consolidated affiliated partnerships and restricted cash	0	0
Debt	1,165	667
Inventory adjustments			37
Planned major maintenance	$ 38	$ 109	$ 7
Maximum | Nitrogen Fertilizer | Energy Segment
Schedule of Significant Accounting Policies [Line Items]
Planned major maintenance, frequency (in years)	3 years
Maximum | Refineries | Energy Segment
Schedule of Significant Accounting Policies [Line Items]
Planned major maintenance, frequency (in years)	5 years
Minimum | Nitrogen Fertilizer | Energy Segment
Schedule of Significant Accounting Policies [Line Items]
Planned major maintenance, frequency (in years)	2 years
Minimum | Refineries | Energy Segment
Schedule of Significant Accounting Policies [Line Items]
Planned major maintenance, frequency (in years)	4 years
Buildings and improvements | Maximum
Schedule of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	40 years	40 years
Buildings and improvements | Minimum
Schedule of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	3 years	3 years
Machinery, equipment and furniture | Maximum
Schedule of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	30 years	30 years
Machinery, equipment and furniture | Minimum
Schedule of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	1 year	1 year
Assets lease to others | Maximum
Schedule of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	30 years
Assets lease to others | Minimum
Schedule of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life (in years)	30 years
Debt
Schedule of Significant Accounting Policies [Line Items]
Reclass to prior year balance as a result of adoption of accounting principle in the current year		$ 39

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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