Comprehensive Income and Accumulated Other Comprehensive Loss - Summary of Items Reclassified Out of Pension and Postretirement Benefit Plan Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 12, 2015	Sep. 06, 2014	Sep. 12, 2015	Sep. 06, 2014
Pension and postretirement benefit plan obligations:
Total reclassifications	$ 15	$ 12	$ 37	$ 28
Income tax benefit	(6)	(5)	(14)	(10)
Total reclassifications, net of tax	9	7	23	18
Selling, General and Administrative Expenses [Member]
Pension and postretirement benefit plan obligations:
Amortization of amounts included in net periodic benefit cost	13	10	33	22
Cost of Sales [Member]
Pension and postretirement benefit plan obligations:
Amortization of amounts included in net periodic benefit cost	$ 2	$ 2	$ 4	$ 6