CONVERTIBLE SENIOR NOTES	6 Months Ended
May 31, 2014
Debt Disclosure [Abstract]
CONVERTIBLE SENIOR NOTES	CONVERTIBLE SENIOR NOTES Description of Convertible Senior Notes In April 2012, we issued convertible senior notes (the “Notes”) in an aggregate principal amount of $600.0 million due May 1, 2032. The Notes bear interest at a rate of 2.25% per annum. The Notes do not contain any financial covenants or any restrictions on the payment of dividends, the incurrence of senior debt or other indebtedness, or the issuance or repurchase of securities by us. Each $1,000 principal amount of Notes is initially convertible, at the option of the holders, at a rate of 19.7750 shares of our common stock, which represents an initial conversion price of approximately $50.57 per share, which is subject to adjustment upon the occurrence of certain events specified in the indenture. On conversion of a Note, we will deliver cash in an amount generally equal to the lesser of the conversion value and the principal amount of each Note and, for any conversion value greater than the principal amount, we will deliver shares of common stock. Holders may convert Notes prior to February 1, 2032, and other than during the period from February 1, 2017 to May 5, 2017, under the following circumstances: (1) if the Notes are called for redemption, at any time prior to the redemption date; (2) during any fiscal quarter, if our last reported sale price of a share of common stock for at least 20 trading days during 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 on each applicable trading day; (3) during any five consecutive trading day period when the trading price per $1,000 principal amount of Notes is less than 98% of the product of the last reported sale price of a share of common stock and the conversion rate; and (4) upon the occurrence of certain distributions or corporate events as specified in the indenture governing the Notes. From February 1, 2017 to May 5, 2017, and from February 1, 2032 until the maturity date, holders may convert Notes at any time, regardless of the foregoing circumstances. After May 5, 2017, we may redeem for cash all or part of the Notes. The redemption price will be equal to the principal amount of the Notes to be redeemed, plus accrued and unpaid interest. Holders may require us to repurchase all or a portion of their Notes on May 5, 2017, May 1, 2022 and May 1, 2027 in cash at a price equal to the principal amount, plus accrued and unpaid interest. Upon the occurrence of a fundamental change under the indenture for the Notes such as in the event of a change in control, the holders may require us to repurchase all or a portion of their Notes at the principal amount of the Notes plus accrued and unpaid interest. Following certain corporate transactions that constitute a fundamental change, the conversion rate may increase for a holder who elects to convert the Notes. Upon conversion, we will deliver an amount of cash and a number of shares of common stock, if any, equal to the sum of the daily settlement amounts for each daily volume weighted average price in the 35 day observation period for such Note as determined pursuant to the indenture for the Notes. Accounting of Convertible Senior Notes Accounting guidance requires that convertible debt that can be settled for cash, such as the Notes, be separated into the liability and equity component at issuance and each be assigned a value. The value assigned to the liability component is the estimated fair value, as of the issuance date, of a similar debt without the conversion feature. The difference between the cash proceeds and estimated fair value of the liability component, representing the value of the conversion premium assigned to the equity component, is recorded as a debt discount on the issuance date. This debt discount is amortized to interest expense using the effective interest method over the period from the issuance date through the first stated repurchase date on May 5, 2017. We estimated the straight debt borrowing rates at debt origination to be 5.50% for the Notes and determined the debt discount to be $84.6 million. As a result, a conversion premium after tax of $52.6 million was recorded in additional paid-in capital. As of May 31, 2014, the carrying value of the Notes was $548.1 million, which consisted of $600.0 million outstanding principal amount net of $51.9 million unamortized debt discount. In connection with the issuance of the Notes, we incurred $15.6 million of issuance costs, which primarily consisted of investment banker fees and legal and other professional service fees. Deferred issuance costs of $13.4 million attributable to the liability component are being amortized to interest expense through May 5, 2017, and $2.2 million ($1.4 million net of tax) of transaction costs attributable to the equity component were netted with the equity component in additional paid-in capital at the issuance date. The deferred debt issuance costs are recorded within other assets in accordance with short- and long-term classification. If the holders require conversion of some or all of the Notes when the conversion requirements are met, we would accelerate amortization of the pro rata share of the unamortized balance of the issuance cost to additional paid-in capital on such date. For the second quarter ended May 31, 2014, we recognized interest expense of $8.1 million related to the Notes, comprised of $3.3 million for the contractual coupon interest, $4.1 million related to the amortization of debt discount and $0.7 million related to the amortization of deferred debt issuance costs. The Notes are carried at face value less any unamortized debt discount and also require disclosure of an estimate of fair value (Level 2 of the three-tier value hierarchy). The fair value of the Notes at each balance sheet date is determined based on recent quoted market prices or dealer quotes for the Notes, if available. Otherwise, the fair value is determined using cash-flow models of the scheduled payments discounted at market interest rates for comparable debt without the conversion feature. As of May 31, 2014, the estimated fair value of the Notes was approximately $608.1 million.

CONVERTIBLE SENIOR NOTES

Description of Convertible Senior Notes

In April 2012, we issued convertible senior notes (the “Notes”) in an aggregate principal amount of $600.0 million due May 1, 2032. The Notes bear interest at a rate of 2.25% per annum. The Notes do not contain any financial covenants or any restrictions on the payment of dividends, the incurrence of senior debt or other indebtedness, or the issuance or repurchase of securities by us. Each $1,000 principal amount of Notes is initially convertible, at the option of the holders, at a rate of 19.7750 shares of our common stock, which represents an initial conversion price of approximately $50.57 per share, which is subject to adjustment upon the occurrence of certain events specified in the indenture. On conversion of a Note, we will deliver cash in an amount generally equal to the lesser of the conversion value and the principal amount of each Note and, for any conversion value greater than the principal amount, we will deliver shares of common stock. Holders may convert Notes prior to February 1, 2032, and other than during the period from February 1, 2017 to May 5, 2017, under the following circumstances: (1) if the Notes are called for redemption, at any time prior to the redemption date; (2) during any fiscal quarter, if our last reported sale price of a share of common stock for at least 20 trading days during 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 on each applicable trading day; (3) during any five consecutive trading day period when the trading price per $1,000 principal amount of Notes is less than 98% of the product of the last reported sale price of a share of common stock and the conversion rate; and (4) upon the occurrence of certain distributions or corporate events as specified in the indenture governing the Notes. From February 1, 2017 to May 5, 2017, and from February 1, 2032 until the maturity date, holders may convert Notes at any time, regardless of the foregoing circumstances.

After May 5, 2017, we may redeem for cash all or part of the Notes. The redemption price will be equal to the principal amount of the Notes to be redeemed, plus accrued and unpaid interest. Holders may require us to repurchase all or a portion of their Notes on May 5, 2017, May 1, 2022 and May 1, 2027 in cash at a price equal to the principal amount, plus accrued and unpaid interest.

Upon the occurrence of a fundamental change under the indenture for the Notes such as in the event of a change in control, the holders may require us to repurchase all or a portion of their Notes at the principal amount of the Notes plus accrued and unpaid interest. Following certain corporate transactions that constitute a fundamental change, the conversion rate may increase for a holder who elects to convert the Notes. Upon conversion, we will deliver an amount of cash and a number of shares of common stock, if any, equal to the sum of the daily settlement amounts for each daily volume weighted average price in the 35 day observation period for such Note as determined pursuant to the indenture for the Notes.

Accounting of Convertible Senior Notes

Accounting guidance requires that convertible debt that can be settled for cash, such as the Notes, be separated into the liability and equity component at issuance and each be assigned a value. The value assigned to the liability component is the estimated fair value, as of the issuance date, of a similar debt without the conversion feature. The difference between the cash proceeds and estimated fair value of the liability component, representing the value of the conversion premium assigned to the equity component, is recorded as a debt discount on the issuance date. This debt discount is amortized to interest expense using the effective interest method over the period from the issuance date through the first stated repurchase date on May 5, 2017. We estimated the straight debt borrowing rates at debt origination to be 5.50% for the Notes and determined the debt discount to be $84.6 million. As a result, a conversion premium after tax of $52.6 million was recorded in additional paid-in capital.

As of May 31, 2014, the carrying value of the Notes was $548.1 million, which consisted of $600.0 million outstanding principal amount net of $51.9 million unamortized debt discount.

In connection with the issuance of the Notes, we incurred $15.6 million of issuance costs, which primarily consisted of investment banker fees and legal and other professional service fees. Deferred issuance costs of $13.4 million attributable to the liability component are being amortized to interest expense through May 5, 2017, and $2.2 million ($1.4 million net of tax) of transaction costs attributable to the equity component were netted with the equity component in additional paid-in capital at the issuance date. The deferred debt issuance costs are recorded within other assets in accordance with short- and long-term classification. If the holders require conversion of some or all of the Notes when the conversion requirements are met, we would accelerate amortization of the pro rata share of the unamortized balance of the issuance cost to additional paid-in capital on such date.

For the second quarter ended May 31, 2014, we recognized interest expense of $8.1 million related to the Notes, comprised of $3.3 million for the contractual coupon interest, $4.1 million related to the amortization of debt discount and $0.7 million related to the amortization of deferred debt issuance costs.

The Notes are carried at face value less any unamortized debt discount and also require disclosure of an estimate of fair value (Level 2 of the three-tier value hierarchy). The fair value of the Notes at each balance sheet date is determined based on recent quoted market prices or dealer quotes for the Notes, if available. Otherwise, the fair value is determined using cash-flow models of the scheduled payments discounted at market interest rates for comparable debt without the conversion feature. As of May 31, 2014, the estimated fair value of the Notes was approximately $608.1 million.