SECURITIES REPURCHASES AND SHARE ISSUANCES	12 Months Ended
Dec. 31, 2015
Equity [Abstract]
SECURITIES REPURCHASES AND SHARE ISSUANCES	SECURITIES REPURCHASES AND SHARE ISSUANCES Securities Repurchase Programs On November 19, 2012, the Company announced that its Board of Directors had approved a new securities repurchase program (the “2012 Securities Repurchase Program”). Under the 2012 Securities Repurchase Program, which commenced on November 15, 2012, the Company could make purchases of up to $1.50 billion of senior notes, common shares and/or other future debt or shares, subject to any restrictions in the Company’s financing agreements and applicable law. The 2012 Securities Repurchase Program terminated on November 14, 2013. On November 21, 2013, the Company’s Board of Directors approved a new securities repurchase program (the “2013 Securities Repurchase Program”). Under the 2013 Securities Repurchase Program, which commenced on November 22, 2013, the Company could make purchases of up to $1.50 billion of its convertible notes, senior notes, common shares and/or other future debt or shares, subject to any restrictions in the Company’s financing agreements and applicable law. The 2013 Securities Repurchase Program terminated on November 21, 2014. On November 20, 2014, the Company’s Board of Directors approved a new securities repurchase program (the “2014 Securities Repurchase Program”). Under the 2014 Securities Repurchase Program, which commenced on November 21, 2014, the Company could make purchases of up to $2.00 billion of its convertible notes, senior notes, common shares and/or other future debt or shares, subject to any restrictions in the Company’s financing agreements and applicable law. The 2014 Securities Repurchase Program terminated on November 20, 2015. On November 18, 2015, the Company’s Board of Directors approved a new securities repurchase program (the “2015 Securities Repurchase Program”). Under the 2015 Securities Repurchase Program, which commenced on November 21, 2015, the Company could make purchases of up to $3.00 billion of its convertible notes, senior notes, common shares and/or other future debt or shares, subject to any restrictions in the Company’s financing agreements and applicable law. The 2015 Securities Repurchase Program will terminate on November 20, 2016. The Board of Directors also approved a sub-limit under the 2015 Securities Repurchase Program for the repurchase of an amount of common shares equal to the greater of 10% of the Company’s public float or 5% of the Company’s issued and outstanding common shares, in each case calculated as of the date of the commencement of the 2015 Securities Repurchase Program. The Company may initially purchase up to 5% of the Company's issued and outstanding common shares, calculated as of the date of the commencement of the 2015 Securities Repurchase Program, through the facilities of the New York Stock Exchange (“NYSE”). Subject to completion of appropriate filings with and approval by the Toronto Stock Exchange (“TSX”), the Company may also make purchases of its common shares over the facilities of the TSX. Purchases of common shares will be made at prevailing market prices of such shares on the NYSE or the TSX, as the case may be, at the time of the acquisition and shall be made in accordance with the respective rules and guidelines of the NYSE and the TSX and applicable law. Repurchases of Shares and Senior Notes During the year ended December 31, 2015, no common shares were repurchased under the 2015 Securities Repurchase Program. During the year ended December 31, 2015, under the 2014 Securities Repurchase Program, the Company repurchased 424,215 of its common shares for an aggregate purchase price of $72 million. The excess of the purchase price over the carrying value of the common shares repurchased of $60 million was charged to the accumulated deficit. These common shares were subsequently cancelled. During the years ended December 31, 2014 and 2013, no common shares were repurchased under the 2013 Securities Repurchase Program or the 2014 Securities Repurchase Program. During the year ended December 31, 2013, under the 2012 Securities Repurchase Program, the Company repurchased 507,957 of its common shares for an aggregate purchase price of $36 million. The excess of the purchase price over the carrying value of the common shares repurchased of $26 million was charged to the accumulated deficit. These common shares were subsequently cancelled. During the years ended December 31, 2015, 2014, and 2013, the Company did not make any purchases of its senior notes under the applicable securities repurchase programs. Additional Repurchases outside the 2012 Securities Repurchase Program In addition to the repurchases made under the 2012 Securities Repurchase Program, during the second quarter of 2013, the Company repurchased an additional 217,294 of its common shares on behalf of certain members of the Company’s Board of Directors, in connection with the share settlement of certain deferred stock units and restricted stock units held by such directors following the termination of the applicable equity program. These common shares were subsequently transferred to such directors. These common shares were repurchased for an aggregate purchase price of $20 million. The excess of the purchase price over the carrying value of the common shares repurchased of $16 million was charged to the accumulated deficit. As the common shares were repurchased on behalf of certain of the Company’s directors, these repurchases were not made under the 2012 Securities Repurchase Program. Issuances of Common Stock On June 10, 2015, the Company issued 213,610 common shares, representing a portion of the consideration transferred in connection with the acquisition of certain assets of Dendreon. The shares had an aggregate value of approximately $50 million as of the date of issuance. See Note 4 for additional information regarding the acquisition of certain assets of Dendreon. On March 27, 2015, the Company completed, pursuant to an Underwriting Agreement dated March 17, 2015 with Deutsche Bank Securities Inc. on behalf of several underwriters, a registered offering in the United States of 7,286,432 of its common shares, no par value, at a price of $199.00 per common share, for aggregate gross proceeds of approximately $1.45 billion. In connection with the issuance of these new common shares, the Company incurred approximately $18 million of issuance costs, which has been reflected as reduction to the gross proceeds from the equity issuance. The proceeds of this offering were used to fund the Salix Acquisition. The Company granted the underwriters an option to purchase additional common shares equal to up to 15% of the common shares initially issued in the offering. This option was not exercised by the underwriters. On June 24, 2013, the Company completed, pursuant to an Underwriting Agreement with Goldman Sachs & Co. and Goldman Sachs Canada, Inc., a public offering for the sale of 27,058,824 of its common shares, no par value, at a price of $85.00 per share, or aggregate gross proceeds of approximately $2.3 billion. In connection with the issuance of these new common shares, the Company incurred approximately $31 million of issuance costs, which has been reflected as reduction to the gross proceeds from the equity issuance.

SECURITIES REPURCHASES AND SHARE ISSUANCES

Securities Repurchase Programs

On November 19, 2012, the Company announced that its Board of Directors had approved a new securities repurchase program (the “2012 Securities Repurchase Program”). Under the 2012 Securities Repurchase Program, which commenced on November 15, 2012, the Company could make purchases of up to $1.50 billion of senior notes, common shares and/or other future debt or shares, subject to any restrictions in the Company’s financing agreements and applicable law. The 2012 Securities Repurchase Program terminated on November 14, 2013.

On November 21, 2013, the Company’s Board of Directors approved a new securities repurchase program (the “2013 Securities Repurchase Program”). Under the 2013 Securities Repurchase Program, which commenced on November 22, 2013, the Company could make purchases of up to $1.50 billion of its convertible notes, senior notes, common shares and/or other future debt or shares, subject to any restrictions in the Company’s financing agreements and applicable law. The 2013 Securities Repurchase Program terminated on November 21, 2014.

On November 20, 2014, the Company’s Board of Directors approved a new securities repurchase program (the “2014 Securities Repurchase Program”). Under the 2014 Securities Repurchase Program, which commenced on November 21, 2014, the Company could make purchases of up to $2.00 billion of its convertible notes, senior notes, common shares and/or other future debt or shares, subject to any restrictions in the Company’s financing agreements and applicable law. The 2014 Securities Repurchase Program terminated on November 20, 2015.

On November 18, 2015, the Company’s Board of Directors approved a new securities repurchase program (the “2015 Securities Repurchase Program”). Under the 2015 Securities Repurchase Program, which commenced on November 21, 2015, the Company could make purchases of up to $3.00 billion of its convertible notes, senior notes, common shares and/or other future debt or shares, subject to any restrictions in the Company’s financing agreements and applicable law. The 2015 Securities Repurchase Program will terminate on November 20, 2016.

The Board of Directors also approved a sub-limit under the 2015 Securities Repurchase Program for the repurchase of an amount of common shares equal to the greater of 10% of the Company’s public float or 5% of the Company’s issued and outstanding common shares, in each case calculated as of the date of the commencement of the 2015 Securities Repurchase Program. The Company may initially purchase up to 5% of the Company's issued and outstanding common shares, calculated as of the date of the commencement of the 2015 Securities Repurchase Program, through the facilities of the New York Stock Exchange (“NYSE”). Subject to completion of appropriate filings with and approval by the Toronto Stock Exchange (“TSX”), the Company may also make purchases of its common shares over the facilities of the TSX. Purchases of common shares will be made at prevailing market prices of such shares on the NYSE or the TSX, as the case may be, at the time of the acquisition and shall be made in accordance with the respective rules and guidelines of the NYSE and the TSX and applicable law.

Repurchases of Shares and Senior Notes

During the year ended December 31, 2015, no common shares were repurchased under the 2015 Securities Repurchase Program.

During the year ended December 31, 2015, under the 2014 Securities Repurchase Program, the Company repurchased 424,215 of its common shares for an aggregate purchase price of $72 million. The excess of the purchase price over the carrying value of the common shares repurchased of $60 million was charged to the accumulated deficit. These common shares were subsequently cancelled.

During the years ended December 31, 2014 and 2013, no common shares were repurchased under the 2013 Securities Repurchase Program or the 2014 Securities Repurchase Program.

During the year ended December 31, 2013, under the 2012 Securities Repurchase Program, the Company repurchased 507,957 of its common shares for an aggregate purchase price of $36 million. The excess of the purchase price over the carrying value of the common shares repurchased of $26 million was charged to the accumulated deficit. These common shares were subsequently cancelled.

During the years ended December 31, 2015, 2014, and 2013, the Company did not make any purchases of its senior notes under the applicable securities repurchase programs.

Additional Repurchases outside the 2012 Securities Repurchase Program

In addition to the repurchases made under the 2012 Securities Repurchase Program, during the second quarter of 2013, the Company repurchased an additional 217,294 of its common shares on behalf of certain members of the Company’s Board of Directors, in connection with the share settlement of certain deferred stock units and restricted stock units held by such directors following the termination of the applicable equity program. These common shares were subsequently transferred to such directors. These common shares were repurchased for an aggregate purchase price of $20 million. The excess of the purchase price over the carrying value of the common shares repurchased of $16 million was charged to the accumulated deficit. As the common shares were repurchased on behalf of certain of the Company’s directors, these repurchases were not made under the 2012 Securities Repurchase Program.

Issuances of Common Stock

On June 10, 2015, the Company issued 213,610 common shares, representing a portion of the consideration transferred in connection with the acquisition of certain assets of Dendreon. The shares had an aggregate value of approximately $50 million as of the date of issuance. See Note 4 for additional information regarding the acquisition of certain assets of Dendreon.

On March 27, 2015, the Company completed, pursuant to an Underwriting Agreement dated March 17, 2015 with Deutsche Bank Securities Inc. on behalf of several underwriters, a registered offering in the United States of 7,286,432 of its common shares, no par value, at a price of $199.00 per common share, for aggregate gross proceeds of approximately $1.45 billion. In connection with the issuance of these new common shares, the Company incurred approximately $18 million of issuance costs, which has been reflected as reduction to the gross proceeds from the equity issuance. The proceeds of this offering were used to fund the Salix Acquisition. The Company granted the underwriters an option to purchase additional common shares equal to up to 15% of the common shares initially issued in the offering. This option was not exercised by the underwriters.

On June 24, 2013, the Company completed, pursuant to an Underwriting Agreement with Goldman Sachs & Co. and Goldman Sachs Canada, Inc., a public offering for the sale of 27,058,824 of its common shares, no par value, at a price of $85.00 per share, or aggregate gross proceeds of approximately $2.3 billion. In connection with the issuance of these new common shares, the Company incurred approximately $31 million of issuance costs, which has been reflected as reduction to the gross proceeds from the equity issuance.