Long-term debt (Tables)

3 Months Ended

Apr. 27, 2014

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

	April 27, 2014			January 26, 2014
	(In thousands)
Amount of the equity component	$	125,725		$	125,725
1.00% convertible senior notes due 2018	$	1,500,000		$	1,500,000
Unamortized debt discount (1)	(136,724		)	(143,625		)
Net carrying amount	$	1,363,276		$	1,356,375

(1) As of April 27, 2014, the remaining period over which the unamortized debt discount will be amortized is 4.6 years.

The following table presents the interest expense for the contractual interest and the accretion of debt discount:

	Three Months Ended
	April 27, 2014
	(In thousands)
Contractual coupon interest expense	$	3,750
Amortization of debt discount	6,901
Amortization of debt issuance costs	49
Total interest expense related to Notes	$	10,700