Income Taxes Components of Income Tax Expense and Sources of Income (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 24, 2017	Feb. 26, 2016	Feb. 27, 2015
Sources of Income (Loss) Before Income Tax Expense [Abstract]
Domestic	$ 136.0	$ 114.9	$ 146.2
Foreign	60.3	59.9	(9.2)
Income before income tax expense	196.3	174.8	137.0
Current Income Taxes [Abstract]
Federal	18.4	47.7	40.0
State and Local	9.5	12.5	8.8
Foreign	17.0	12.6	1.7
Current Income Taxes	44.9	72.8	50.5
Deferred Income Taxes [Abstract]
Federal	21.4	(12.7)	4.9
State and Local	1.2	(3.3)	1.3
Foreign	4.2	(52.3)	(5.8)
Deferred income taxes	26.8	(68.3)	0.4
Income tax expense	$ 71.7	$ 4.5	$ 50.9