Postretirement Health Care and Life Insurance Benefits (Narrative) (Details) (Postretirement Obligations, USD $) In Millions, unless otherwise specified	12 Months Ended
Feb. 01, 2014
Postretirement Obligations
Estimated net actuarial gain of postretirement benefit obligations	$ 4

Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

No definition available.

Name:	us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration