Supplemental Financial Information Supplemental Financial Information - Property, Plant and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 800	$ 977
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	478	581
Property, plant and equipment, net	322	396
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	7	32
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	196	230
Machinery and other equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 597	$ 715