The 2016 Notes may be converted at any time prior to the close of business on the business day immediately preceding February 15, 2016, at the option of the holder, only under the following circumstances: 1) during the five business-day period after any ten consecutive trading-day period (the "measurement period") in which the trading price per $1,000 principal amount of 2016 notes 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 applicable conversion rate on each such trading day; 2) during any fiscal quarter commencing after the fiscal quarter ending September 25, 2011, if the last reported sale price of the Company's common stock for 20 or more trading days in a period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price in effect on the last trading day of the immediately preceding fiscal quarter; or 3) upon the occurrence of specified corporate events. On and after February 15, 2016 until the close of business on the second scheduled trading day immediately preceding the maturity date of May 15, 2016, holders may convert their notes at any time, regardless of the foregoing circumstances.

Upon conversion, a holder will receive the conversion value of the 2016 Notes to be converted equal to the conversion rate multiplied by the volume weighted average price of the Company's common stock during a specified period following the conversion date. The conversion value of each 2016 Note will be paid in: 1) cash equal to the principal amount of the note and 2) to the extent the conversion value exceeds the principal amount of the note, common stock (plus cash in lieu of any fractional shares of common stock). The conversion price will be subject to adjustment in some events but will not be adjusted for accrued interest. Upon a "fundamental change" at any time, as defined, the Company will in some cases increase the conversion rate for a holder who elects to convert its 2016 Notes in connection with such fundamental change. In addition, the holders may require the Company to repurchase for cash all or a portion of their notes upon a "designated event" at a price equal to 100% of the principal amount of the notes being repurchased plus accrued and unpaid interest, if any.

Percentage of principal amounts being repurchased

100.00%

Annual interest rate paid by cash semi-annually

0.50%

Cost of convertible bond hedge

76,200,000

Convertible bond hedge at inception of the transaction on stockholders equity

28,200,000

Proceeds from sale of warrants

57,600,000

Warrant conversion price

$ 71.34

Shares issued under warrants

7.1

Fair value of notes

423,800,000

0.50% Convertible Senior Notes Due 2016 [Member] | Convertible Note Hedge [Member]

Long Term Debt [Line Items]

Warrant conversion price

$ 71.34

1.25% Convertible Senior Notes Due 2018 [Member]

Long Term Debt [Line Items]

Aggregate principal amount of notes

450,000,000

Initial conversion rate of common stock shares

15.8687

Principal amount of convertible debt conversion increments

1,000

Convertible senior notes principal amount of initial conversion price per share

$ 63.02

Principal amount of the liability component

345,100,000

Discount rate on recognized principal amount value

5.27%

Effective interest rates on the liability component

5.27%

Unamortized discount balance

96,900,000

103,200,000

Carrying value of equity components

104,900,000

Remaining life of bond discount, years

6.4

Percentage of product last reported sale price of common stock

98.00%

Period of time that common stock sale price for preceding quarter exceeds conversion price

Number of consecutive trading days period required

Stock price percentage of conversion price

130.00%

Terms and conditions for holders to convert notes

The 2018 Notes may be converted at any time prior to the close of business on the business day immediately preceding February 15, 2018, at the option of the holder only under the following circumstances: 1) during the five business-day period after any ten consecutive trading-day period (the "measurement period") in which the trading price per 1,000 principal amount of 2018 notes 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 applicable conversion rate on each such trading day; 2) during any fiscal quarter commencing after the fiscal quarter ending September 25, 2011, if the last reported sale price of the Company's common stock for 20 or more trading days in a period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price in effect on the last trading day of the immediately preceding fiscal quarter; or 3) upon the occurrence of specified corporate events. On and after February 15, 2018 until the close of business on the second scheduled trading day immediately preceding the maturity date of May 15, 2018, holders may convert their notes at any time, regardless of the foregoing circumstances.

Upon conversion, a holder will receive the conversion value of the 2018 Notes to be converted equal to the conversion rate multiplied by the volume weighted average price of the Company's common stock during a specified period following the conversion date. The conversion value of each 2018 Notes will be paid in: 1) cash equal to the principal amount of the note, and 2) to the extent the conversion value exceeds the principal amount of the note, common stock (plus cash in lieu of any fractional shares of common stock). The conversion price will be subject to adjustment in some events but will not be adjusted for accrued interest. Upon a "fundamental change" at any time, as defined, the Company will in some cases increase the conversion rate for a holder who elects to convert its 2018 Notes in connection with such fundamental change. In addition, the holders may require the Company to repurchase for cash all or a portion of their notes upon a "designated event" at a price equal to 100% of the principal amount of the notes being repurchased plus accrued and unpaid interest, if any.

Percentage of principal amounts being repurchased

100.00%

Annual interest rate paid by cash semi-annually

1.25%

Cost of convertible bond hedge

104,900,000

Convertible bond hedge at inception of the transaction on stockholders equity

38,800,000

Shares of common stock agreed to sell

7.1

Proceeds from sale of warrants

76,300,000