Comprehensive Income and Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Sep. 08, 2018	Sep. 09, 2017	Sep. 08, 2018	Sep. 09, 2017	Feb. 24, 2018	Feb. 25, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss		$ 435	$ 373	$ 435	$ 373	$ 507	$ 383
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax				0	(1)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax				0	1
Net current-period Other comprehensive income	[1]	0	1	0	1
Net current-period Other comprehensive income		0	0	0	0
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss		(271)	(277)	(271)	(277)	(210)	(276)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax				0	(1)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax				0	0
Net current-period Other comprehensive income				0	1
Adoption of ASU 2018-02				(61)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss		0	(1)	0	(1)	0	(2)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax				0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax					1
Net current-period Other comprehensive income				0	1
Adoption of ASU 2018-02				0
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss		$ (271)	$ (278)	(271)	(278)	$ (210)	$ (278)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Net current-period Other comprehensive income				0	$ 0
Adoption of ASU 2018-02				$ (61)

[1] Amounts are net of tax expense (benefit) of $0, $0, $0 and $(1) for the second quarters of fiscal 2019 and 2018, and for fiscal 2019 and 2018 year-to-date, respectively.