Investment In Unconsolidated Affiliates Table - Summarized Financial Information (Details) (Ranch JV [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Ranch JV [Member]
Schedule of Equity Method Investments [Line Items]
Current assets	$ 16	$ 7
Property, plant and equipment, net	95	100
Other assets	4	4
Total assets	115	111
Current liabilities	2	3
Equity	113	108
Total liabilities and equity	115	111
Revenue	41	16	1
Operating income (loss)	29	4	(2)
Net income (loss)	$ 29	$ 4	$ (2)