PENSION PLANS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended		12 Months Ended
	Jan. 29, 2012	Jul. 31, 2011	Jan. 30, 2011	Jan. 29, 2012	Jan. 30, 2011	Apr. 29, 2012 Scenario, Forecast [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 9.3		$ 9.2	$ 28.0	$ 27.7
Interest cost	19.0		18.7	57.0	56.2
Expected return on plan assets	(19.9)		(16.0)	(59.7)	(48.0)
Net amortization	5.9		8.5	17.6	25.5
Pension expense	14.3		20.4	42.9	61.4
Current Year Employer Contributions [Abstract]
Voluntary Contribution to Qualified Pension Plans		$ 100.0
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year, Description						approximately $140.0 million