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Goodwill & Other Intangible Assets Goodwill (Details) - USD ($) $ in Millions		12 Months Ended
		Feb. 23, 2018	Feb. 24, 2017	Feb. 26, 2016
Goodwill [Line Items]
Goodwill, Acquired During Period	[1]	$ 31.2
Goodwill [Roll Forward]
Goodwill		471.4
Accumulated impairment losses		364.7	$ 364.7
Currency translation adjustments		0.3	0.3
Goodwill		502.9	471.4
Goodwill, net		138.2	106.7	$ 106.4
Asia Pacific Reporting Unit [Member] [Domain]
Goodwill [Roll Forward]
Goodwill, net				0.0
Americas [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	[1]	31.2
Goodwill [Roll Forward]
Goodwill		89.9
Accumulated impairment losses		1.7	1.7
Currency translation adjustments		0.3	0.3
Goodwill		121.4	89.9
Goodwill, net		119.7	88.2	87.9
EMEA [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period		0.0
Goodwill [Roll Forward]
Goodwill		265.0
Accumulated impairment losses		265.0	265.0
Currency translation adjustments		0.0	0.0
Goodwill		265.0	265.0
Goodwill, net		0.0	0.0	0.0
Other category [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period		0.0
Intangible asset impairment charges		0.0	0.0
Goodwill [Roll Forward]
Goodwill		116.5
Accumulated impairment losses		98.0	98.0
Currency translation adjustments		0.0	0.0
Goodwill		116.5	116.5
Goodwill, net		$ 18.5	$ 18.5	$ 18.5
[1] (1)In 2018, we acquired AMQ Solutions and certain assets of Tricom Vision Limited resulting in a goodwill addition in the Americas segment. See Note 18 for additional information.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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