Nonpension Postretirement and Postemployment Benefits (Tables)

12 Months Ended

Dec. 28, 2019

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)	2019			2018
Change in accumulated benefit obligation
Beginning of year	$	1,069		$	1,190
Service cost	15			18
Interest cost	37			36
Actuarial (gain) loss	59			(105		)
Benefits paid	(60		)	(67		)
Curtailments	(6		)	—
Amendments	—			—
Foreign currency adjustments	2			(3		)
End of year	$	1,116		$	1,069
Change in plan assets
Fair value beginning of year	$	1,140		$	1,292
Actual return on plan assets	282			(91		)
Employer contributions	18			17
Benefits paid	(76		)	(78		)
Fair value end of year	$	1,364		$	1,140
Funded status	$	248		$	71
Amounts recognized in the Consolidated Balance Sheet consist of
Other non-current assets	$	283		$	107
Other current liabilities	(2		)	(2		)
Other liabilities	(33		)	(34		)
Net amount recognized	$	248		$	71
Amounts recognized in accumulated other comprehensive income consist of
Prior service credit	(59		)	(68		)
Net amount recognized	$	(59	)	$	(68	)

Schedule of Net Benefit Costs [Table Text Block]

(millions)	2019			2018			2017
Service cost	$	15		$	18		$	18
Interest cost	37			36			37
Expected return on plan assets	(86		)	(94		)	(98		)
Amortization of unrecognized prior service credit	(9		)	(9		)	(9		)
Recognized net (gain) loss	(137		)	81			(90		)
Net periodic benefit cost	(180		)	32			(142		)
Curtailment	(6		)	—			3
Postretirement benefit expense:
Defined benefit plans	(186		)	32			(139		)
Defined contribution plans	11			11			16
Total	$	(175	)	$	43		$	(123	)

Defined Benefit Plan, Assumptions [Table Text Block]

	2019		2018		2017
Discount rate	3.3	%	4.3	%	3.6	%

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

	2019		2018		2017
Discount rate	4.0	%	3.6	%	4.0	%
Long-term rate of return on plan assets	7.3	%	7.5	%	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	$	3	$	(2	)
Effect on postretirement benefit obligation	77		(66		)

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	$	8	$	1	$	—	$	—	$	9
Corporate stock, common:
Domestic	242		—		—		—		242
International	11		—		—		—		11
Mutual funds:
Domestic equity	—		35		—		—		35
International equity	—		—		—		—		—
Domestic debt	—		53		—		—		53
Collective trusts:
Domestic equity	—		—		—		286		286
International equity	—		—		—		293		293
Limited partnerships	—		—		—		124		124
Bonds, corporate	—		136		—		—		136
Bonds, government	—		77		—		—		77
Bonds, other	—		9		—		—		9
Real estate	—		—		—		88		88
Other	—		1		—		—		1
Total	$	261	$	312	$	—	$	791	$	1,364

(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 29, 2018 are summarized as follows:

(millions)	Total Level 1		Total Level 2		Total Level 3		Total NAV (practical expedient)(a)		Total
Cash and cash equivalents	$	2	$	1	$	—	$	—	$	3
Corporate stock, common:
Domestic	108		—		—		—		108
International	5		1		—		—		6
Mutual funds:
Domestic equity	—		37		—		—		37
International equity	—		—		—		—		—
Domestic debt	—		42		—		—		42
Collective trusts:
Domestic equity	—		—		—		281		281
International equity	—		—		—		228		228
Limited partnerships	—		—		—		199		199
Bonds, corporate	—		95		—		—		95
Bonds, government	—		50		—		—		50
Bonds, other	—		7		—		83		90
Other	—		1		—		—		1
Total	$	115	$	234	$	—	$	791	$	1,140

(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)	2019			2018
Change in accumulated benefit obligation
Beginning of year	$	42		$	43
Service cost	3			3
Interest cost	2			1
Actuarial (gain)loss	8			3
Benefits paid	(7		)	(8		)
Amendments	—			—
Foreign currency adjustments	—			—
End of year	$	48		$	42
Funded status	$	(48	)	$	(42	)
Amounts recognized in the Consolidated Balance Sheet consist of
Other current liabilities	$	(7	)	$	(5	)
Other liabilities	(41		)	(37		)
Net amount recognized	$	(48	)	$	(42	)
Amounts recognized in accumulated other comprehensive income consist of
Net prior service cost	$	3		$	4
Net experience gain	(22		)	(38		)
Net amount recognized	$	(19	)	$	(34	)

Schedule of Net Benefit Costs [Table Text Block]

(millions)	2019			2018			2017
Service cost	$	3		$	3		$	6
Interest cost	2			1			3
Amortization of unrecognized prior service cost	1			1			1
Recognized net loss	(5		)	(5		)	—
Net periodic benefit cost	$	1		$	—		$	10
Settlement cost	(3		)	—			—
Postemployment benefit expense	$	(2	)	$	—		$	10

Schedule of Expected Benefit Payments [Table Text Block]

(millions)	Postretirement		Postemployment
2020	$	66	$	8
2021	67		6
2022	67		5
2023	68		5
2024	68		5
2025-2029	337		20