Restructuring Activities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended				12 Months Ended		9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Nov. 23, 2012	Nov. 25, 2011	Nov. 23, 2012	Nov. 25, 2011	Nov. 23, 2012 Cost of Sales [Member]	Nov. 25, 2011 Cost of Sales [Member]	Nov. 23, 2012 Cost of Sales [Member]	Nov. 25, 2011 Cost of Sales [Member]	Nov. 23, 2012 Operating Expense [Member]	Nov. 25, 2011 Operating Expense [Member]	Nov. 23, 2012 Operating Expense [Member]	Nov. 25, 2011 Operating Expense [Member]	Nov. 23, 2012 PolyVision Technology SES Integration Plan Announced Q2 2013 [Member]	Nov. 23, 2012 Americas Modernization Plan Announced Q4 2011 [Member]	Feb. 24, 2012 Americas Modernization Plan Announced Q4 2011 [Member]	Feb. 25, 2011 Americas Modernization Plan Announced Q4 2011 [Member]	Nov. 23, 2012 Employee Severance [Member]	Nov. 23, 2012 Employee Severance [Member] PolyVision Technology SES Integration Plan Announced Q2 2013 [Member]	Nov. 23, 2012 Employee Severance [Member] PolyVision Technology SES Integration Plan Announced Q2 2013 [Member]	Nov. 23, 2012 Employee Severance [Member] Americas Modernization Plan Announced Q4 2011 [Member]	Nov. 23, 2012 Employee Severance [Member] Americas Modernization Plan Announced Q4 2011 [Member]	Nov. 23, 2012 Other Restructuring [Member]	Nov. 23, 2012 Other Restructuring [Member] PolyVision Technology SES Integration Plan Announced Q2 2013 [Member]	Nov. 23, 2012 Other Restructuring [Member] PolyVision Technology SES Integration Plan Announced Q2 2013 [Member]	Nov. 23, 2012 Other Restructuring [Member] Americas Modernization Plan Announced Q4 2011 [Member]	Nov. 23, 2012 Other Restructuring [Member] Americas Modernization Plan Announced Q4 2011 [Member]	Nov. 23, 2012 Americas [Member] Cost of Sales [Member]	Nov. 25, 2011 Americas [Member] Cost of Sales [Member]	Nov. 23, 2012 Americas [Member] Cost of Sales [Member]	Nov. 25, 2011 Americas [Member] Cost of Sales [Member]	Nov. 23, 2012 Americas [Member] Operating Expense [Member]	Nov. 25, 2011 Americas [Member] Operating Expense [Member]	Nov. 23, 2012 Americas [Member] Operating Expense [Member]	Nov. 25, 2011 Americas [Member] Operating Expense [Member]	Nov. 23, 2012 EMEA [Member] Cost of Sales [Member]	Nov. 25, 2011 EMEA [Member] Cost of Sales [Member]	Nov. 23, 2012 EMEA [Member] Cost of Sales [Member]	Nov. 25, 2011 EMEA [Member] Cost of Sales [Member]	Nov. 23, 2012 EMEA [Member] Operating Expense [Member]	Nov. 25, 2011 EMEA [Member] Operating Expense [Member]	Nov. 23, 2012 EMEA [Member] Operating Expense [Member]	Nov. 25, 2011 EMEA [Member] Operating Expense [Member]	Nov. 23, 2012 Other category [Member] Cost of Sales [Member]	Nov. 25, 2011 Other category [Member] Cost of Sales [Member]	Nov. 23, 2012 Other category [Member] Cost of Sales [Member]	Nov. 25, 2011 Other category [Member] Cost of Sales [Member]	Nov. 23, 2012 Other category [Member] Operating Expense [Member]	Nov. 25, 2011 Other category [Member] Operating Expense [Member]	Nov. 23, 2012 Other category [Member] Operating Expense [Member]	Nov. 25, 2011 Other category [Member] Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost													$ 4	$ 42					$ 2		$ 29			$ 2		$ 13
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period			17.6														12.9					4.7
Restructuring costs	6.0	3.8	14.8	26.0	3.3	3.3	11.8	24.7	2.7	0.5	3.0	1.3			17.9	10.1	6.2	1.1		0.9	3.7	8.6	0.5		2.1	7.3	3.2	2.9	11.4	15.4	1.8	0.5	1.8	0.5	0.1	0.4	0.4	8.2	0.4	0.2	0.4	1.0	0	0	0	1.1	0.5	(0.2)	0.8	(0.2)
Restructuring reserve, settled with cash			(22.5)														(11.8)					(10.7)
Restructuring reserve, accrual adjustment			0														(0.2)					0.2
Restructuring reserve, end of period	$ 9.9		$ 9.9														$ 7.1					$ 2.8
Document Period End Date			Nov. 23, 2012