Nonpension Postretirement and Postemployment Benefits (Tables)

12 Months Ended

Dec. 30, 2017

Nonpension Postretirement [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

(millions)	2017			2016
Change in accumulated benefit obligation
Beginning of year	$	1,161		$	1,163
Service cost	18			21
Interest cost	37			39
Actuarial (gain) loss	29			2
Benefits paid	(61		)	(65		)
Curtailments	3			—
Amendments	—			—
Foreign currency adjustments	3			1
End of year	$	1,190		$	1,161
Change in plan assets
Fair value beginning of year	$	1,136		$	1,084
Actual return on plan assets	217			111
Employer contributions	13			15
Benefits paid	(74		)	(74		)
Fair value end of year	$	1,292		$	1,136
Funded status	$	102		$	(25	)
Amounts recognized in the Consolidated Balance Sheet consist of
Other non-current assets	$	144		$	17
Other current liabilities	(2		)	(2		)
Other liabilities	(40		)	(40		)
Net amount recognized	$	102		$	(25	)
Amounts recognized in accumulated other comprehensive income consist of
Prior service credit	(77		)	(86		)
Net amount recognized	$	(77	)	$	(86	)

Schedule of Net Benefit Costs [Table Text Block]

(millions)	2017			2016			2015
Service cost	$	18		$	21		$	29
Interest cost	37			39			48
Expected return on plan assets	(98		)	(90		)	(100		)
Amortization of unrecognized prior service credit	(9		)	(9		)	(5		)
Recognized net (gain) loss	(90		)	(19		)	112
Net periodic benefit cost	(142		)	(58		)	84
Curtailment	3			—			—
Postretirement benefit expense:
Defined benefit plans	(139		)	(58		)	84
Defined contribution plans	16			17			14
Total	$	(123	)	$	(41	)	$	98

Schedule of Assumptions Used [Table Text Block]

	2017		2016		2015
Discount rate	3.6	%	4.0	%	4.2	%

The weighted-average actuarial assumptions used to determine annual net periodic benefit cost were:

	2017		2016		2015
Discount rate	4.0	%	4.2	%	4.0	%
Long-term rate of return on plan assets	8.5	%	8.5	%	8.5	%

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

(millions)	One percentage point increase		One percentage point decrease
Effect on total of service and interest cost components	$	7	$	(4	)
Effect on postretirement benefit obligation	117		(79		)

Schedule of Allocation of Plan Assets [Table Text Block]

(millions)	Total Level 1		Total Level 2		Total Level 3		Total NAV (practical expedient)(a)		Total
Cash and cash equivalents	$	—	$	13	$	—	$	—	$	13
Corporate stock, common:
Domestic	141		—		—		—		141
International	8		—		—		—		8
Mutual funds:
Domestic equity	—		52		—		—		52
International equity	—		40		—		—		40
Domestic debt	—		52		—		—		52
Collective trusts:
Domestic equity	—		—		—		273		273
International equity	—		—		—		266		266
Limited partnerships	—		—		—		215		215
Bonds, corporate	—		117		—		—		117
Bonds, government	—		53		—		—		53
Bonds, other	—		9		—		—		9
Real estate	—		—		—		51		51
Other	—		2		—		—		2
Total	$	149	$	338	$	—	$	805	$	1,292

(a) Certain assets that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy.

The fair value of Plan assets at December 31, 2016 are summarized as follows:

(millions)	Total Level 1		Total Level 2		Total Level 3		Total NAV (practical expedient)(a)		Total
Cash and cash equivalents	$	4	$	6	$	—	$	—	$	10
Corporate stock, common:
Domestic	143		—		—		—		143
International	6		1		—		—		7
Mutual funds:
Domestic equity	—		57		—		—		57
International equity	—		30		—		—		30
Domestic debt	—		53		—		—		53
Collective trusts:
Domestic equity	—		—		—		272		272
International equity	—		—		—		210		210
Limited partnerships	—		—		—		177		177
Bonds, corporate	—		117		—		—		117
Bonds, government	—		48		—		—		48
Bonds, other	—		10		—		—		10
Other	—		2		—		—		2
Total	$	153	$	324	$	—	$	659	$	1,136

(a) Certain assets that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy.

Postemployment [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

(millions)	2017			2016
Change in accumulated benefit obligation
Beginning of year	$	87		$	108
Service cost	6			7
Interest cost	3			3
Actuarial (gain)loss	(45		)	(25		)
Benefits paid	(8		)	(6		)
Amendments	—			—
Foreign currency adjustments	—			—
End of year	$	43		$	87
Funded status	$	(43	)	$	(87	)
Amounts recognized in the Consolidated Balance Sheet consist of
Other current liabilities	$	(4	)	$	(8	)
Other liabilities	(39		)	(79		)
Net amount recognized	$	(43	)	$	(87	)
Amounts recognized in accumulated other comprehensive income consist of
Net prior service cost	$	5		$	6
Net experience gain	(46		)	(1		)
Net amount recognized	$	(41	)	$	5

Schedule of Net Benefit Costs [Table Text Block]

(millions)	2017		2016		2015
Service cost	$	6	$	7	$	7
Interest cost	3		3		4
Amortization of unrecognized prior service cost	1		1		1
Recognized net loss	—		3		3
Postemployment benefit expense	$	10	$	14	$	15

Schedule of Expected Benefit Payments [Table Text Block]

(millions)	Postretirement		Postemployment
2018	$	81	$	4
2019	76		4
2020	73		4
2021	72		4
2022	73		3
2023-2027	367		18