Change in Accounting Policy (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Nov. 02, 2014	Nov. 02, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Change in Accounting Policy, Effect of Change on Operating Expenses	$ 142	$ 424
Change in Accounting Policy, Effect of Change on Cost of Sales	$ 142	$ 424

Effect on operating expenses due to change in accounting policy.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration