Income Taxes (Details) (Narratives) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Income Taxes [Line Items]
Provision (benefit) for income taxes	$ 4	$ 3	$ 6	$ 5
Gross unrecognized tax benefits	62		62
Unrecognized tax benefits, estimated increase (decrease) over the next 12 months	(31)		(31)
Foreign Taxes in Profitable Locations
Income Taxes [Line Items]
Provision (benefit) for income taxes	5	3	8	5
Other Comprehensive Income and Tax Credits
Income Taxes [Line Items]
Provision (benefit) for income taxes	(1)		(2)
Other Comprehensive Income (Loss)
Income Taxes [Line Items]
Provision (benefit) for income taxes		1		2
Canadian Tax Credits and Monetization of U.S. Tax Credits.
Income Taxes [Line Items]
Provision (benefit) for income taxes		$ (1)		$ (2)