Subsequent Events	3 Months Ended
Mar. 31, 2014
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS Convertible Notes Offering On April 30, 2014, the Company completed a private placement of $1.25 billion principal amount of 0.500% Convertible Senior Notes due 2019 (the “Convertible Notes”). The net proceeds from this offering were approximately $1.23 billion, after deducting the initial purchasers’ discounts and commissions and the estimated offering expenses payable by the Company. The Company used approximately $71.8 million of the net proceeds to pay the cost of the Initial Bond Hedges described below (after such cost was partially offset by the proceeds to the Company from the Initial Warrant Transactions described below). The Company used the remainder of the net proceeds from the offering and a portion of its existing cash and investments to purchase an aggregate of approximately $1.5 billion of its common stock, as authorized under its share repurchase program. The Company used approximately $101.0 million to purchase shares of common stock from certain purchasers of the Convertible Notes in privately negotiated transactions concurrently with the closing of the offering, and the remaining $1.4 billion to purchase additional shares of common stock through an ASR, which the Company entered into with Citibank, N.A. (the “ASR Counterparty”) on April 25, 2014 (the “ASR Agreement”). On May 6, 2014, the Company issued an additional $187.5 million principal amount of Convertible Notes (such additional Convertible Notes, the "Additional Notes") pursuant to the full exercise of the over-allotment option granted to the initial purchasers in the offering, (the “Over-Allotment Option”). The net proceeds from the sale of the Additional Notes were approximately $184.9 million, after deducting the initial purchasers’ discounts and commissions payable by us. The Company used approximately $10.8 million of the net proceeds from the exercise of the Over-Allotment Option to pay the cost of Additional Bond Hedges (after such cost was partially offset by the proceeds to the Company from Additional Warrant Transactions), as defined below. The Company intends to use the remainder of the net proceeds for working capital and general corporate purposes. The Convertible Notes are governed by the terms of an indenture, dated as of April 30, 2014 (the “Indenture”), between the Company and Wilmington Trust, National Association, as trustee (the “Trustee”). The Convertible Notes are the senior unsecured obligations of the Company and bear interest at a rate of 0.500% per annum, payable semi-annually in arrears on April 15 and October 15 of each year, commencing October 15, 2014. The Convertible Notes will mature on April 15, 2019, unless earlier repurchased or converted. At any time prior to the close of business on the business day immediately preceding October 15, 2018, holders may convert their Convertible Notes at their option only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on September 30, 2014 (and only during such calendar quarter), if the last reported sale price of the common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “measurement period”) in which the trading price per $1,000 principal amount of Convertible Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the common stock and the conversion rate on each such trading day; or (3) upon the occurrence of specified corporate events. On or after October 15, 2018 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their notes at any time, regardless of the foregoing circumstances. Upon conversion, the Company will pay cash up to the aggregate principal amount of the Convertible Notes to be converted and pay or deliver, as the case may be, cash, shares of common stock or a combination of cash and shares of common stock, at the Company’s election, in respect of the remainder, if any, of the Company’s conversion obligation in excess of the aggregate principal amount of the Convertible Notes being converted. Holders will not receive any additional cash payment or additional shares of the Company's common stock representing accrued and unpaid interest, if any, upon conversion of a Convertible Note, except in limited circumstances. Instead, interest will be deemed to be paid by the cash and shares, if any, of the Company’s common stock paid or delivered, as the case may be, to such holder upon conversion of a Convertible Note. The conversion rate for the Convertible Notes will initially be 11.1111 shares of common stock per $1,000 principal amount of Convertible Notes, which corresponds to an initial conversion price of approximately $90.00 per share of common stock. The conversion rate is subject to adjustment from time to time upon the occurrence of certain events, including, but not limited to, the issuance of certain stock dividends on common stock, the issuance of certain rights or warrants, subdivisions, combinations, distributions of capital stock, indebtedness, or assets, the payment of cash dividends and certain issuer tender or exchange offers. The Company may not redeem the Convertible Notes prior to the maturity date and no “sinking fund” is provided for the Convertible Notes, which means that the Company is not required to periodically redeem or retire the Convertible Notes. Upon the occurrence of certain fundamental changes involving the Company, holders of the Convertible Notes may require the Company to repurchase for cash all or part of their Convertible Notes in principal amounts of $1,000 or an integral multiple thereof at a repurchase price equal to 100% of the principal amount of the Convertible Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date. The Indenture does not contain any financial or maintenance covenants or restrictions on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by the Company or any of its subsidiaries. The Indenture contains customary terms and covenants and events of default. If an event of default (other than certain events of bankruptcy, insolvency or reorganization involving the Company) occurs and is continuing, the Trustee by notice to the Company, or the holders of at least 25% in principal amount of the outstanding Convertible Notes by written notice to the Company and the Trustee, may declare 100% of the principal of and accrued and unpaid interest, if any, on all the Convertible Notes to be due and payable. Upon such a declaration of acceleration, such principal and accrued and unpaid interest, if any, will be due and payable immediately. Upon the occurrence of certain events of bankruptcy, insolvency or reorganization involving the Company, 100% of the principal of and accrued and unpaid interest, if any, on all of the Convertible Notes will become due and payable automatically. Notwithstanding the foregoing, the Indenture provides that, to the extent the Company elects and for up to 270 days, the sole remedy for an event of default relating to certain failures by the Company to comply with certain reporting covenants in the Indenture consists exclusively of the right to receive additional interest on the Convertible Notes. Convertible Note Hedge and Warrant Transactions In connection with the pricing of the Convertible Notes, on April 24, 2014, the Company entered into convertible note hedge transactions relating to approximately 13.9 million shares of common stock (the “Initial Bond Hedges”) with JPMorgan Chase Bank, National Association, London Branch; Goldman, Sachs & Co.; Bank of America, N.A.; and Royal Bank of Canada (the “Option Counterparties”). On April 24, 2014, the Company also entered into separate warrant transactions (the “Initial Warrant Transactions”) with each of the Option Counterparties relating to approximately 13.9 million shares of common stock. In connection with the exercise of the Over-Allotment Option, on May 1, 2014, the Company entered into additional convertible note hedge transactions (the “Additional Bond Hedges”, and together with the Initial Bond Hedges, the “Bond Hedges”) with the Option Counterparties relating to approximately 2.1 million shares of common stock. On May 1, 2014, the Company also entered into separate additional warrant transactions (the “Additional Warrant Transactions”, and together with the Initial Warrant Transactions, the “Warrant Transactions”) with each of the Option Counterparties relating to approximately 2.1 million shares of common stock. The Bond Hedges are expected generally to reduce the potential dilution upon conversion of the Convertible Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of the Convertible Notes upon conversion of any Convertible Notes, as the case may be, in the event that the market price per share of common stock, as measured under the terms of the Bond Hedges, is greater than the strike price of the Bond Hedges, which initially corresponds to the conversion price of the Convertible Notes and is subject to anti-dilution adjustments substantially similar to those applicable to the conversion rate of the Convertible Notes. The Warrant Transactions will separately have a dilutive effect to the extent that the market value per share of common stock, as measured under the terms of the Warrant Transactions, exceeds the applicable strike price of the warrants issued pursuant to the Warrant Transactions (the “Warrants”). The initial strike price of the Warrants is $120.00 per share. Aside from the initial payment of a premium to the Option Counterparties under the Bond Hedges, which amount is partially offset by the receipt of a premium under the Warrant Transactions, the Company is not required to make any cash payments to the Option Counterparties under the Bond Hedges and will not receive any proceeds if the Warrants are exercised. Accelerated Share Repurchase Program On April 25, 2014, the Company entered into the ASR Agreement as part of the Company’s previously announced share repurchase program. On April 30, 2014, under the ASR Agreement, the Company paid $1.4 billion to the ASR Counterparty and received approximately 19.2 million shares of its common stock from the ASR Counterparty. The total number of shares of common stock that the Company will repurchase under the ASR Agreement will be based on the average of the daily volume-weighted average prices of the common stock during the term of the ASR Agreement, less a discount. At settlement, the ASR Counterparty may be required to deliver additional shares of the Company’s common stock to the Company or, under certain circumstances, the Company may be required to deliver shares of its common stock or make a cash payment to the ASR Counterparty. Final settlement of the ASR Agreement is expected to be completed by the end of December 2014, although the settlement may be accelerated at the ASR Counterparty’s option. The ASR Agreement provides that the ASR Counterparty can terminate the transaction following the occurrence of certain specified events, including major corporate transactions involving the Company.

SUBSEQUENT EVENTS

Convertible Notes Offering

On April 30, 2014, the Company completed a private placement of $1.25 billion principal amount of 0.500% Convertible Senior Notes due 2019 (the “Convertible Notes”). The net proceeds from this offering were approximately $1.23 billion, after deducting the initial purchasers’ discounts and commissions and the estimated offering expenses payable by the Company. The Company used approximately $71.8 million of the net proceeds to pay the cost of the Initial Bond Hedges described below (after such cost was partially offset by the proceeds to the Company from the Initial Warrant Transactions described below). The Company used the remainder of the net proceeds from the offering and a portion of its existing cash and investments to purchase an aggregate of approximately $1.5 billion of its common stock, as authorized under its share repurchase program. The Company used approximately $101.0 million to purchase shares of common stock from certain purchasers of the Convertible Notes in privately negotiated transactions concurrently with the closing of the offering, and the remaining $1.4 billion to purchase additional shares of common stock through an ASR, which the Company entered into with Citibank, N.A. (the “ASR Counterparty”) on April 25, 2014 (the “ASR Agreement”).

On May 6, 2014, the Company issued an additional $187.5 million principal amount of Convertible Notes (such additional Convertible Notes, the "Additional Notes") pursuant to the full exercise of the over-allotment option granted to the initial purchasers in the offering, (the “Over-Allotment Option”). The net proceeds from the sale of the Additional Notes were approximately $184.9 million, after deducting the initial purchasers’ discounts and commissions payable by us. The Company used approximately $10.8 million of the net proceeds from the exercise of the Over-Allotment Option to pay the cost of Additional Bond Hedges (after such cost was partially offset by the proceeds to the Company from Additional Warrant Transactions), as defined below. The Company intends to use the remainder of the net proceeds for working capital and general corporate purposes.

The Convertible Notes are governed by the terms of an indenture, dated as of April 30, 2014 (the “Indenture”), between the Company and Wilmington Trust, National Association, as trustee (the “Trustee”). The Convertible Notes are the senior unsecured obligations of the Company and bear interest at a rate of 0.500% per annum, payable semi-annually in arrears on April 15 and October 15 of each year, commencing October 15, 2014. The Convertible Notes will mature on April 15, 2019, unless earlier repurchased or converted. At any time prior to the close of business on the business day immediately preceding October 15, 2018, holders may convert their Convertible Notes at their option only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on September 30, 2014 (and only during such calendar quarter), if the last reported sale price of the common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “measurement period”) in which the trading price per $1,000 principal amount of Convertible Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the common stock and the conversion rate on each such trading day; or (3) upon the occurrence of specified corporate events. On or after October 15, 2018 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their notes at any time, regardless of the foregoing circumstances.

Upon conversion, the Company will pay cash up to the aggregate principal amount of the Convertible Notes to be converted and pay or deliver, as the case may be, cash, shares of common stock or a combination of cash and shares of common stock, at the Company’s election, in respect of the remainder, if any, of the Company’s conversion obligation in excess of the aggregate principal amount of the Convertible Notes being converted. Holders will not receive any additional cash payment or additional shares of the Company's common stock representing accrued and unpaid interest, if any, upon conversion of a Convertible Note, except in limited circumstances. Instead, interest will be deemed to be paid by the cash and shares, if any, of the Company’s common stock paid or delivered, as the case may be, to such holder upon conversion of a Convertible Note.

The conversion rate for the Convertible Notes will initially be 11.1111 shares of common stock per $1,000 principal amount of Convertible Notes, which corresponds to an initial conversion price of approximately $90.00 per share of common stock. The conversion rate is subject to adjustment from time to time upon the occurrence of certain events, including, but not limited to, the issuance of certain stock dividends on common stock, the issuance of certain rights or warrants, subdivisions, combinations, distributions of capital stock, indebtedness, or assets, the payment of cash dividends and certain issuer tender or exchange offers.

The Company may not redeem the Convertible Notes prior to the maturity date and no “sinking fund” is provided for the Convertible Notes, which means that the Company is not required to periodically redeem or retire the Convertible Notes. Upon the occurrence of certain fundamental changes involving the Company, holders of the Convertible Notes may require the Company to repurchase for cash all or part of their Convertible Notes in principal amounts of $1,000 or an integral multiple thereof at a repurchase price equal to 100% of the principal amount of the Convertible Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date.

The Indenture does not contain any financial or maintenance covenants or restrictions on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by the Company or any of its subsidiaries. The Indenture contains customary terms and covenants and events of default. If an event of default (other than certain events of bankruptcy, insolvency or reorganization involving the Company) occurs and is continuing, the Trustee by notice to the Company, or the holders of at least 25% in principal amount of the outstanding Convertible Notes by written notice to the Company and the Trustee, may declare 100% of the principal of and accrued and unpaid interest, if any, on all the Convertible Notes to be due and payable. Upon such a declaration of acceleration, such principal and accrued and unpaid interest, if any, will be due and payable immediately. Upon the occurrence of certain events of bankruptcy, insolvency or reorganization involving the Company, 100% of the principal of and accrued and unpaid interest, if any, on all of the Convertible Notes will become due and payable automatically. Notwithstanding the foregoing, the Indenture provides that, to the extent the Company elects and for up to 270 days, the sole remedy for an event of default relating to certain failures by the Company to comply with certain reporting covenants in the Indenture consists exclusively of the right to receive additional interest on the Convertible Notes.

Convertible Note Hedge and Warrant Transactions

In connection with the pricing of the Convertible Notes, on April 24, 2014, the Company entered into convertible note hedge transactions relating to approximately 13.9 million shares of common stock (the “Initial Bond Hedges”) with JPMorgan Chase Bank, National Association, London Branch; Goldman, Sachs & Co.; Bank of America, N.A.; and Royal Bank of Canada (the “Option Counterparties”). On April 24, 2014, the Company also entered into separate warrant transactions (the “Initial Warrant Transactions”) with each of the Option Counterparties relating to approximately 13.9 million shares of common stock.

In connection with the exercise of the Over-Allotment Option, on May 1, 2014, the Company entered into additional convertible note hedge transactions (the “Additional Bond Hedges”, and together with the Initial Bond Hedges, the “Bond Hedges”) with the Option Counterparties relating to approximately 2.1 million shares of common stock. On May 1, 2014, the Company also entered into separate additional warrant transactions (the “Additional Warrant Transactions”, and together with the Initial Warrant Transactions, the “Warrant Transactions”) with each of the Option Counterparties relating to approximately 2.1 million shares of common stock.

The Bond Hedges are expected generally to reduce the potential dilution upon conversion of the Convertible Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of the Convertible Notes upon conversion of any Convertible Notes, as the case may be, in the event that the market price per share of common stock, as measured under the terms of the Bond Hedges, is greater than the strike price of the Bond Hedges, which initially corresponds to the conversion price of the Convertible Notes and is subject to anti-dilution adjustments substantially similar to those applicable to the conversion rate of the Convertible Notes. The Warrant Transactions will separately have a dilutive effect to the extent that the market value per share of common stock, as measured under the terms of the Warrant Transactions, exceeds the applicable strike price of the warrants issued pursuant to the Warrant Transactions (the “Warrants”). The initial strike price of the Warrants is $120.00 per share.

Aside from the initial payment of a premium to the Option Counterparties under the Bond Hedges, which amount is partially offset by the receipt of a premium under the Warrant Transactions, the Company is not required to make any cash payments to the Option Counterparties under the Bond Hedges and will not receive any proceeds if the Warrants are exercised.

Accelerated Share Repurchase Program

On April 25, 2014, the Company entered into the ASR Agreement as part of the Company’s previously announced share repurchase program. On April 30, 2014, under the ASR Agreement, the Company paid $1.4 billion to the ASR Counterparty and received approximately 19.2 million shares of its common stock from the ASR Counterparty. The total number of shares of common stock that the Company will repurchase under the ASR Agreement will be based on the average of the daily volume-weighted average prices of the common stock during the term of the ASR Agreement, less a discount. At settlement, the ASR Counterparty may be required to deliver additional shares of the Company’s common stock to the Company or, under certain circumstances, the Company may be required to deliver shares of its common stock or make a cash payment to the ASR Counterparty. Final settlement of the ASR Agreement is expected to be completed by the end of December 2014, although the settlement may be accelerated at the ASR Counterparty’s option. The ASR Agreement provides that the ASR Counterparty can terminate the transaction following the occurrence of certain specified events, including major corporate transactions involving the Company.