BENEFIT PLANS - Net Periodic Benefit Cost (Income) and Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) for Defined Benefit Pension and Other Postretirement Benefit Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Feb. 25, 2017	Feb. 27, 2016	Feb. 28, 2015
Pension Benefits
Net Periodic Benefit Cost
Service cost	$ 0	$ 0	$ 0
Interest cost	84	106	121
Expected return on plan assets	(141)	(142)	(149)
Amortization of prior service benefit	0	0	0
Amortization of net actuarial loss	43	79	68
Settlement	42	0	64
Net periodic benefit cost (income)	28	43	104
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss)
Prior service benefit	0	0	0
Amortization of prior service benefit	0	0	0
Amortization of net actuarial loss	(172)	76	195
Amortization of net actuarial loss	43	79	66
Total expense (benefit) recognized in Other comprehensive income (loss)	(215)	(3)	129
Total expense (benefit) recognized in net periodic benefit cost (income) and Other comprehensive income (loss)	(187)	40	233
Other Postretirement Benefits
Net Periodic Benefit Cost
Service cost	1	0	1
Interest cost	2	3	4
Expected return on plan assets	0	0	0
Amortization of prior service benefit	(15)	(15)	(16)
Amortization of net actuarial loss	2	3	3
Settlement	0	0	0
Net periodic benefit cost (income)	(10)	(9)	(8)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss)
Prior service benefit	(7)	(21)	(5)
Amortization of prior service benefit	15	15	16
Amortization of net actuarial loss	(3)	(7)	6
Amortization of net actuarial loss	2	3	3
Total expense (benefit) recognized in Other comprehensive income (loss)	3	(16)	14
Total expense (benefit) recognized in net periodic benefit cost (income) and Other comprehensive income (loss)	$ (7)	$ (25)	$ 6