Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Class A Common Stock	Additional paid in capital	Treasury Stock	Accumulated other comprehensive income loss	Retained earnings
Beginning balance (in shares) at Feb. 29, 2020		582,997,251		(3,671,621)
Beginning balance at Feb. 29, 2020	$ 2,278.1	$ 5.8	$ 1,824.3	$ (25.8)	$ (118.5)	$ 592.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock to Company's parents (in shares)		1,312,859
Equity-based compensation	19.0		19.0
Shares issued and employee tax withholding on vesting of restricted stock	(6.2)		(6.2)
Repurchase of common stock (in shares)				101,611,736
Repurchase of common stock	(1,680.0)			$ (1,680.0)
Dividends accrued on convertible preferred stock	(3.9)					(3.9)
Net income	586.2					586.2
Other comprehensive income, net of tax	1.7				1.7
Ending balance (in shares) at Jun. 20, 2020		584,310,110		(105,283,357)
Ending balance at Jun. 20, 2020	1,194.9	$ 5.8	1,837.1	$ (1,705.8)	(116.8)	1,174.6
Beginning balance (in shares) at Feb. 27, 2021		585,574,666		(120,009,647)
Beginning balance at Feb. 27, 2021	1,324.3	$ 5.9	1,898.9	$ (1,907.0)	63.5	1,263.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation	22.2		22.2
Shares issued and employee tax withholding on vesting of restricted stock (in shares)		945,942
Shares issued and employee tax withholding on vesting of restricted stock	(10.0)		(10.0)
Dividends declared on common stock	(46.5)					(46.5)
Dividends accrued on convertible preferred stock	(36.4)					(36.4)
Net income	444.8					444.8
Other comprehensive income, net of tax	0.1				0.1
Other activity	(0.1)		0.0			(0.1)
Ending balance (in shares) at Jun. 19, 2021		586,520,608		(120,009,647)
Ending balance at Jun. 19, 2021	$ 1,698.4	$ 5.9	$ 1,911.1	$ (1,907.0)	$ 63.6	$ 1,624.8