Retirement Plans (Tables)

6 Months Ended

Jun. 29, 2019

Components of net periodic benefit cost (credit)

	Three Months Ended				Six Months Ended
	June 29,		June 30,		June 29,		June 30,
(In millions)	2019		2018		2019		2018
Pension Benefits
Service cost	$	22	$	27	$	45	$	53
Interest cost		81		76		163		153
Expected return on plan assets		(139)		(139)		(278)		(277)
Amortization of net actuarial loss		25		39		50		77
Amortization of prior service cost		4		3		7		7
Net periodic benefit cost (credit)	$	(7)	$	6	$	(13)	$	13
Postretirement Benefits Other Than Pensions
Service cost	$	—	$	—	$	1	$	1
Interest cost		3		3		5		5
Amortization of net actuarial loss		(1)		—		(1)		—
Amortization of prior service credit		(1)		(1)		(3)		(3)
Net periodic benefit cost	$	1	$	2	$	2	$	3