Unaudited Quarterly Results (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Feb. 24, 2017	Nov. 25, 2016	Aug. 26, 2016	May 27, 2016	Feb. 26, 2016	Nov. 27, 2015	Aug. 28, 2015	May 29, 2015	Feb. 24, 2017	Feb. 26, 2016	Feb. 27, 2015
Unaudited Quarterly Results [Abstract]
Revenue	$ 769.1	$ 786.5	$ 758.0	$ 718.8	$ 747.9	$ 787.6	$ 819.0	$ 705.5	$ 3,032.4	$ 3,060.0	$ 3,059.7
Gross profit	255.6	261.9	263.1	229.8	234.3	253.5	266.8	216.6	1,010.4	971.2	916.0
Operating income (loss)	50.4	54.6	61.9	33.3	25.8	55.2	60.1	33.5	200.2	174.6	144.9
Net income	$ 25.8	$ 41.2	$ 38.2	$ 19.4	$ 77.5	$ 35.6	$ 37.2	$ 20.0	$ 124.6	$ 170.3	$ 86.1
Earnings per share, basic	$ 0.22	$ 0.34	$ 0.32	$ 0.16	$ 0.63	$ 0.29	$ 0.30	$ 0.16	$ 1.03	$ 1.37	$ 0.69
Earnings per share, diluted	$ 0.21	$ 0.34	$ 0.31	$ 0.16	$ 0.62	$ 0.28	$ 0.30	$ 0.16	$ 1.03	$ 1.36	$ 0.68