Convertible Senior Notes (Details Textual) (USD $)	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 30, 2014 0.25% Convertible Senior Notes due 2016 [Member]	Jan. 01, 2012 0.25% Convertible Senior Notes due 2016 [Member]	Mar. 30, 2014 0.625% Convertible Senior Notes due 2014 [Member]	Dec. 30, 2007 0.625% Convertible Senior Notes due 2014 [Member]
Debt Instrument [Line Items]
Issuance of convertible senior notes		$ 920,000,000		$ 400,000,000
Interest rate on convertible senior notes		0.25%		0.625%
Debt Instrument, Maturity Date		Mar. 15, 2016		Feb. 15, 2014
Effective interest rates of liability component		4.50%		8.30%
Conversion rate per $1,000 principal amount of notes (in shares per thousand dollars)		11.9687
Principal amount used in calculating incremental share settlement amount		1,000
Conversion price (in dollars per share)		$ 83.55
Circumstances of converting notes at referred conversion ratio		(1) during the five business-day period after any 10 consecutive trading day period (the “measurement period”) in which the trading price per 2016 Note for each day of such measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such day; (2) during any calendar quarter (and only during that quarter) after the calendar quarter ending March 31, 2011, if the last reported sale price of the Company’s common stock for 20 or more trading days in the period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter exceeds 130% of the applicable conversion price in effect on the last trading day of the immediately preceding calendar quarter; (3) upon the occurrence of specified events described in the indenture for the 2016 Notes; and (4) at any time on or after December 15, 2015 through the second scheduled trading day immediately preceding the maturity date.
Number of consecutive trading days on which trading price is examined for triggering of conversion (in days)		30 days
Number of consecutive trading days in the measurement period (in days)		10 days
Conversion triggering common stock trading price as a percentage of price last reported in Measurement period converted at conversion rate		less than 98%
Number of days in which common stock prices needed to exceed triggering price in order to trigger conversion (in days)		20 or more
Conversion triggering common stock price as a percentage of applicable conversion price in effect on the last trading day of the immediately preceding calendar quarter		exceeds 130%
Date after which notes will become convertible at any time		Dec. 15, 2015
Convertible senior note conversion start period	Apr. 01, 2014		Apr. 01, 2012
Convertible senior note conversion end period	Jun. 30, 2014		Feb. 12, 2014
If-converted value in excess of principal	$ 817,800,000