Retirement Plans (Reconciliation Of Benefit Obligations, Plan Assets, And Funded Status Of The Supplementary Retirement Plan) (Details) (Supplemental Employee Retirement Plan, USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Supplemental Employee Retirement Plan
Projected benefit obligation, beginning of year	$ 770	$ 795
Service cost	0	6	6
Interest cost	33	32	35
Actuarial (gain) loss	170	(17)
Defined Benefit Plan, Plan Amendments	0	8
Benefits paid	(53)	(54)
Projected benefit obligation, end of year	920	770	795
Fair value of plan assets, beginning of year	0	0
Company contributions	53	54
Fair value of plan assets, end of year	0	0	0
Funded status at end of year	920	770
Accounts payable and accrued liabilities	(69)	(59)
Defined Benefit Pension Plan, Liabilities, Noncurrent	(851)	(711)
Defined Benefit Plan, Amounts Recognized in Balance Sheet	(920)	(770)
Net actuarial (gain) loss	341	176
Prior service credit	8	8
Total included in accumulated other comprehensive income	$ 349	$ 184