Revenue (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Nov. 23, 2018	Nov. 24, 2017	Nov. 23, 2018	Nov. 24, 2017	Feb. 23, 2018
Contract with Customer, Liability		$ 24.3		$ 24.3		$ 28.2
Revenues		901.0	$ 772.1	2,530.8	$ 2,282.8
UNITED STATES
Revenues		586.0	385.7	1,640.1	1,340.7
Foreign locations [Member]
Revenues		315.0	386.4	890.7	942.1
Systems and storage [Member] | Americas [Member]
Revenues		337.6	295.5	906.6	850.0
Systems and storage [Member] | EMEA [Member]
Revenues		49.6	53.8	174.3	158.2
Systems and storage [Member] | Other category [Member]
Revenues		13.8	13.4	41.6	48.3
Seating [Member] | Americas [Member]
Revenues		195.5	181.3	541.4	526.2
Seating [Member] | EMEA [Member]
Revenues		33.1	34.2	121.4	111.0
Seating [Member] | Other category [Member]
Revenues		26.4	16.8	67.9	59.0
Other Product Category [Member] | Americas [Member]
Revenues	[1]	105.5	76.0	380.5	280.1
Other Product Category [Member] | EMEA [Member]
Revenues	[1]	88.2	53.1	145.8	103.2
Other Product Category [Member] | Other category [Member]
Revenues	[1]	$ 51.3	$ 48.0	151.3	$ 146.8
Deposits [Member]
contract with customer, increases in liability due to deposits received				21.4
Contract with Customer, Liability, Revenue Recognized				$ (25.3)

[1] The Other product category data by segment consists primarily of consolidated dealers, textiles and surface materials, worktools, architecture, technology, other uncategorized product lines and services.