Ventures and Variable Interest Entities (Schedule of Variable Interest Entities) (Details) - USD ($) $ in Millions		Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Variable Interest Entity [Line Items]
Cash and cash equivalents		$ 952	$ 780	$ 1,510	$ 984
Property, plant and equipment		3,778	3,733
Other assets		350	377
Total assets		8,908	8,818
Trade payables		608	757
Current liabilities		1,516	1,338
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents		1	1
Property, plant and equipment		754	535
Other assets		40	24
Total assets	[1]	795	560
Trade payables		3	0
Current liabilities	[2]	20	40
Long-term debt		5	0
Total liabilities		28	40
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Property, plant and equipment		86	96
Trade payables		45	43
Current installments of long-term debt		9	9
Long-term debt		114	125
Total liabilities		168	177
Maximum exposure to loss		$ 301	$ 291

[1] Assets can only be used to settle the obligations of Fairway.

[2] Amounts owed by Fairway to the Company for reimbursement of expenditures.