Ventures and Variable Interest Entities (Schedule of Variable Interest Entities) (Details) (USD $) In Millions, unless otherwise specified					9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2014 Variable Interest Entity, Primary Beneficiary [Member]		Sep. 30, 2014 Variable Interest Entity, Not Primary Beneficiary [Member]	Dec. 31, 2013 Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					28 years
Cash and cash equivalents	$ 1,510	$ 984	$ 1,100	$ 959	$ 6
Property, plant and equipment	3,618	3,425			388		101	111
Other assets	365	341			24	[1]
Total assets	9,710	9,018			418	[2]
Trade payables	816	799					45	56
Current installments of long-term debt							9	8
Current liabilities	2,189	1,545			37
Long-term debt							128	136
Total liabilities					37	[3]	182	200
Maximum exposure to loss							$ 300	$ 318

[1] Includes prepaid intangible assets with a weighted average amortization period of 28 years.

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

[3] Represents amounts owed by Fairway for reimbursement of expenditures.