Cash And Cash Equivalents Net Change in Operating Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash and Cash Equivalents [Abstract]
Accounts receivable	$ (770)	$ (392)
Accounts receivable from related companies	(30)	(50)
Inventories	208	(132)
Other current assets	58	(186)
Other non-current assets, net	(23)	(29)
Accounts payable	506	398
Accounts payable to related companies	2	(67)
Exchanges payable	(17)	36
Accrued and other current liabilities	29	92
Other non-current liabilities	(53)	(15)
Price risk management assets and liabilities, net	40	(116)
Net change in operating assets and liabilities, net of effects of acquisitions and deconsolidations	$ (50)	$ (461)