Share-Based Compensation - Fair value of restricted stock awards vested and cash paid for restricted stock awards and performance share units (Details) - USD ($) $ in Millions	3 Months Ended
Apr. 01, 2017	Apr. 02, 2016
Restricted Stock Units
Share-Based Compensation
Fair value of awards vested	$ 24	$ 17
Cash paid	17	12
Performance Share Units
Share-Based Compensation
Cash paid	$ 14	$ 13

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration