Postretirement Benefit Plans (Details 1) - USD ($) $ in Millions	6 Months Ended
Jul. 01, 2016	Jan. 01, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, contributions by employer		$ 97
Defined benefit plan, estimated future employer contributions in remaining fiscal year	$ 76
Net liability reduction for certain post-employment benefit plans		$ (101)

The increase in the fair value of plan assets from contributions made by the employer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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