Income Taxes - Net Deferred Tax Assets And Liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Inventories	$ 27	$ 43
Net operating loss carryforwards	14	20
Post-retirement benefits and other employee benefits	46	44
Pension benefits	20	26
Other	19	21
Total deferred tax assets	126	154
Valuation allowances	(5)	(4)
Net deferred tax assets	121	150
Deferred tax liabilities:
Property, plant and equipment, and intangibles	(138)	(80)
Total deferred tax liabilities	(138)	(80)
Net deferred tax assets (liabilities)	$ (17)	$ 70