Quarterly Financial Data Asset impairment and MTM gains and losses (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Jan. 02, 2016	Jan. 03, 2015
Quarterly Financial Information Disclosure [Abstract]
Restructuring, Settlement and Impairment Provisions	$ 80	$ 85	$ 90	$ 68	$ 74	$ 92	$ 78	$ 54	$ 323	$ 298
Gain Loss On Mark To Market Adjustments	387	27	(35)	67	822	66	12	(116)	446	784
Pre Tax Charges Gains In Operating Profit	$ 467	$ 112	$ 55	$ 135	$ 896	$ 158	$ 90	$ (62)	$ 769	$ 1,082

The aggregate amount provided for estimated restructuring charges, remediation costs, and asset impairment loss during an accounting period. Generally, these items are either unusual or infrequent, but not both (in which case they would be extraordinary items).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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