Income Taxes Income Taxes (Unrecognized Tax Benefits) Details (Details) (USD $)	12 Months Ended
	Jan. 26, 2014	Jan. 27, 2013	Jan. 29, 2012
Income Tax Contingency [Line Items]
Undistributed Earnings Of Non United States Subsidiaries	$ 1,960,000,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	215,400,000
Reduction of deferred tax asset included in unrecognized tax benefit	108,300,000
Income Tax Reconciliation, Tax Contingencies [Abstract]
Balance at beginning of period	220,543,000	138,262,000	121,034,000
Increases in tax positions for prior years	0	18,800,000	385,000
Decreases in tax positions for prior years	(714,000)	(304,000)	(293,000)
Increases in tax positions for current year	22,787,000	67,764,000	22,181,000
Settlements	0	0	0
Lapse in statute of limitations	(4,878,000)	(3,979,000)	(5,045,000)
Balance at end of period	237,738,000	220,543,000	138,262,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	12,900,000	11,300,000	9,500,000
Accrued Income Taxes, Noncurrent	119,977,000	115,267,000
Unrecognized tax benefit (non current)	107,100,000
State and Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	40,300,000
Foreign Country [Member]
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 200,000