Income Taxes - Other (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 28, 2014
Income Tax Disclosure [Abstract]
Liability for unrecognized tax benefits	$ 19	$ 19
Decrease in unrecognized tax benefits is reasonably possible	$ 3

The noncurrent portion of the amount recognized for uncertain tax positions as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.24)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LiabilityForUncertainTaxPositionsNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant