Quarterly Financial Data Asset impairment and MTM gains and losses (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Dec. 31, 2016	Jan. 02, 2016
Quarterly Financial Information Disclosure [Abstract]
Restructuring, Settlement and Impairment Provisions	$ 161	$ 40	$ 72	$ 52	$ 80	$ 85	$ 90	$ 68	$ 325	$ 323
Gain Loss On Mark To Market Adjustments	226	31	(20)	24	387	27	(35)	67	261	446
Pre Tax Charges Gains In Operating Profit	$ 387	$ 71	$ 52	$ 76	$ 467	$ 112	$ 55	$ 135	$ 586	$ 769