RETIREMENT AND BENEFIT PLANS Benefit Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2016	Feb. 01, 2015	Feb. 02, 2014
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit payments	$ (49.1)	$ (29.1)
Actuarial (gain) loss on retirement and benefit plans	20.2	(138.9)	$ 52.5
Pension Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance at beginning of year	734.8	571.5
Service cost	29.9	19.4
Interest cost	27.8	28.5	26.4
Benefit payments	(49.1)	(29.1)
Benefit payments, net of retiree contributions	0.0	0.0
Medicare subsidy	0.0	0.0
Actuarial (gain) loss on retirement and benefit plans	(91.7)	144.5
Balance at end of year	651.7	734.8	571.5
SERP Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance at beginning of year	98.5	80.8
Service cost	5.6	4.5
Interest cost	3.7	4.0	3.6
Benefit payments	(10.1)	(4.7)
Benefit payments, net of retiree contributions	0.0	0.0
Medicare subsidy	0.0	0.0
Actuarial (gain) loss on retirement and benefit plans	(9.1)	13.9
Balance at end of year	88.6	98.5	80.8
Postretirement Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance at beginning of year	18.1	16.1
Service cost	0.0	0.0
Interest cost	0.6	0.8	0.9
Benefit payments	0.0	0.0
Benefit payments, net of retiree contributions	(1.9)	(2.1)
Medicare subsidy	0.0	0.1
Actuarial (gain) loss on retirement and benefit plans	(1.0)	3.2
Balance at end of year	$ 15.8	$ 18.1	$ 16.1