Significant Accounting Policies Level 4 (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Cost of Goods Sold	$ 925	$ 1,173	$ 1,848	$ 2,299
Selling, General and Administrative Expense	76	93	158	187
Income tax expense	1	9	27	15
Net loss	(2)	(22)	(36)	(40)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0	0	0	0
Increase (Decrease) in Inventories			8	(122)
Increase (Decrease) in Income Taxes Payable			13	(1)
Increase (Decrease) in Other Operating Liabilities			(3)	(18)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	11	(26)	(85)	(41)
Scenario, Previously Reported [Member]
Cost of Goods Sold	927	1,174	1,850	2,303
Selling, General and Administrative Expense	79	95	164	191
Income tax expense	0	11		21
Net loss	(6)	(27)	(44)	(54)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	6	2	11	5
Increase (Decrease) in Inventories			(6)	120
Increase (Decrease) in Income Taxes Payable				5
Increase (Decrease) in Other Operating Liabilities			7	(12)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	13	(29)	(82)	(50)
Scenario, Adjustment [Member]
Cost of Goods Sold	(2)	(1)	(2)	(4)
Selling, General and Administrative Expense	(3)	(2)	(6)	(4)
Income tax expense	1	(2)		(6)
Net loss	4	5	8	14
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	(6)	(2)	(11)	(5)
Increase (Decrease) in Inventories			(2)	2
Increase (Decrease) in Income Taxes Payable				(6)
Increase (Decrease) in Other Operating Liabilities			(10)	(6)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(2)	$ 3	(3)	$ 9
Equity Method Investee [Member]
settlement discounts issued to related party	$ 1		$ 3