Benefit Plans - Net Periodic Benefit Expense and Contributions for Defined Benefit Pension Plans and Other Postretirement Benefit Plans (Detail) - USD ($) $ in Millions	4 Months Ended
	Jun. 18, 2016	Jun. 20, 2015
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 0	$ 0
Interest cost	26	33
Expected return on assets	(44)	(44)
Amortization of prior service benefit	0	0
Amortization of net actuarial loss	14	24
Net periodic benefit expense (income)	(4)	13
Contributions to benefit plans	(1)	(26)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	0	0
Interest cost	1	1
Expected return on assets	0	0
Amortization of prior service benefit	(5)	(4)
Amortization of net actuarial loss	1	2
Net periodic benefit expense (income)	(3)	(1)
Contributions to benefit plans	$ 0	$ (11)