Restructuring and Impairment Charges 2014 Productivity Plan Activity Rollforward (Details) - USD ($) $ in Millions	3 Months Ended				8 Months Ended
	Sep. 08, 2018		Sep. 09, 2017		Sep. 08, 2018		Sep. 09, 2017		Dec. 30, 2017
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring					$ (179)		$ (83)
2014 Productivity Plan [Member] [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 107				107				$ 226
Restructuring, Settlement and Impairment Provisions	35		$ 8		79		69
Payments for Restructuring					(179)
Restructuring Reserve, Settled without Cash					(19)
Employee Severance [Member] | 2014 Productivity Plan [Member] [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	100				100				212
Restructuring, Settlement and Impairment Provisions	24	[1]	7	[1]	48	[2]	56	[2]
Payments for Restructuring					(150)
Restructuring Reserve, Settled without Cash					(10)
Asset Impairment [Member] | 2014 Productivity Plan [Member] [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0				0				0
Restructuring, Settlement and Impairment Provisions	3		3		11		16
Payments for Restructuring					0
Restructuring Reserve, Settled without Cash					(11)
Other Restructuring [Member] | 2014 Productivity Plan [Member] [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	7				7				$ 14
Restructuring, Settlement and Impairment Provisions	$ 8		$ (2)		20		$ (3)
Payments for Restructuring					(29)
Restructuring Reserve, Settled without Cash					$ 2

[1] There were no net charges related to other pension and retiree medical benefits for the 12 weeks ended September 8, 2018. The 12 weeks ended September 9, 2017 includes charges related to other pension and retiree medical benefits of $2 million. Income amounts represent adjustments for changes in estimates of previously recorded amounts.

[2] Includes charges related to other pension and retiree medical benefits of $4 million for each of the 36 weeks ended September 8, 2018 and September 9, 2017. Income amounts represent adjustments for changes in estimates of previously recorded amounts.