Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($)	12 Months Ended
	Feb. 23, 2019	Feb. 24, 2018	Feb. 25, 2017
Income Statement [Abstract]
Net sales and other revenue	$ 60,534,500,000	$ 59,924,600,000	$ 59,678,200,000
Cost of sales	43,639,900,000	43,563,500,000	43,037,700,000
Gross profit	16,894,600,000	16,361,100,000	16,640,500,000
Selling and administrative expenses	16,107,300,000	16,275,400,000	16,032,900,000
Goodwill impairment	0	142,300,000	0
Operating income (loss)	787,300,000	(56,600,000)	607,600,000
Interest expense, net	830,800,000	874,800,000	1,003,800,000
Loss (gain) on debt extinguishment	8,700,000	(4,700,000)	111,700,000
Other income	(104,400,000)	(9,200,000)	(44,300,000)
Income (loss) before income taxes	52,200,000	(917,500,000)	(463,600,000)
Income tax benefit	(78,900,000)	(963,800,000)	(90,300,000)
Net income (loss)	131,100,000	46,300,000	(373,300,000)
Other comprehensive income (loss):
(Loss) gain on interest rate swaps, net of tax	(15,500,000)	47,000,000.0	39,400,000
Recognition of pension (loss) gain, net of tax	(83,100,000)	92,200,000	82,000,000.0
Foreign currency translation adjustment, net of tax	(300,000)	65,000,000.0	(20,500,000)
Other	(900,000)	(300,000)	(1,000,000.0)
Current-period other comprehensive loss, net	(99,800,000)	203,900,000	99,900,000
Comprehensive income (loss)	$ 31,300,000	$ 250,200,000	$ (273,400,000)