Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2017

Compensation and Retirement Disclosure [Abstract]

Components of Plan Benefit Expense

Pension

	Quarter ended						Year-to-date period ended
(millions)	September 30, 2017			October 1, 2016			September 30, 2017			October 1, 2016
Service cost	$	22		$	25		$	72		$	74
Interest cost	40			43			123			131
Expected return on plan assets	(97		)	(87		)	(277		)	(266		)
Amortization of unrecognized prior service cost	3			3			7			10
Recognized net (gain) loss	83			28			84			28
Net periodic benefit cost	51			12			9			(23		)
Curtailment (gain) loss	(134		)	—			(136		)	—
Total pension (income) expense	$	(83	)	$	12		$	(127	)	$	(23	)

Other nonpension postretirement

	Quarter ended						Year-to-date period ended
(millions)	September 30, 2017			October 1, 2016			September 30, 2017			October 1, 2016
Service cost	$	5		$	5		$	14		$	15
Interest cost	10			10			28			29
Expected return on plan assets	(24		)	(22		)	(73		)	(67		)
Amortization of unrecognized prior service (gain)	(3		)	(2		)	(7		)	(7		)
Recognized net (gain) loss	—			—			(29		)	—
Net periodic benefit cost	(12		)	(9		)	(67		)	(30		)
Curtailment loss	—			—			3			—
Total postretirement benefit (income) expense	$	(12	)	$	(9	)	$	(64	)	$	(30	)

Postemployment

	Quarter ended				Year-to-date period ended
(millions)	September 30, 2017		October 1, 2016		September 30, 2017		October 1, 2016
Service cost	$	1	$	1	$	4	$	5
Interest cost	—		1		2		3
Recognized net loss	—		1		1		3
Total postemployment benefit expense	$	1	$	3	$	7	$	11

Contributions to Employee Benefit Plans

(millions)	Pension		Nonpension postretirement		Total
Quarter ended:
September 30, 2017	$	2	$	3	$	5
October 1, 2016	$	3	$	3	$	6
Year-to-date period ended:
September 30, 2017	$	25	$	8	$	33
October 1, 2016	$	18	$	11	$	29
Full year:
Fiscal year 2017 (projected)	$	26	$	16	$	42
Fiscal year 2016 (actual)	$	18	$	15	$	33