LONG-TERM DEBT (Details 3) € in Millions						3 Months Ended				9 Months Ended
	Mar. 27, 2015 USD ($)	Mar. 27, 2015 EUR (€)	Feb. 20, 2015 USD ($)	Feb. 17, 2015 USD ($)	Jan. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Apr. 01, 2015 USD ($)	Dec. 31, 2014
Debt Instrument [Line Items]
Issuance of long-term debt, net of discount						$ 0			$ 555,000,000	$ 16,925,800,000	$ 963,400,000
Loss on extinguishment of debt						$ 0			$ 0	20,000,000	$ 93,700,000
Issuance of common stock	$ 1,450,000,000									$ 1,481,000,000
Salix
Debt Instrument [Line Items]
Restricted cash								$ 10,340,000,000
Issuance of common stock	1,450,000,000
5.50% Senior Notes due March 2023
Debt Instrument [Line Items]
Proceeds from issuance of debt					$ 1,000,000,000
Stated interest rate on debt (as a percent)					5.50%	5.50%				5.50%			5.50%
Underwriting fees					$ 8,000,000
Issuance of long-term debt, net of discount					$ 992,000,000
Maximum percentage of the aggregate principal amount that may be redeemed with the net proceeds of certain equity offerings					40.00%
Redemption price, using proceeds from certain equity offerings as a percentage of the principal amount					105.50%
Redemption price as a percentage of principal amount as per the merger agreement					101.00%
6.875% Senior Notes due in December 2018
Debt Instrument [Line Items]
Stated interest rate on debt (as a percent)				6.875%	6.875%	6.875%				6.875%			6.875%
Aggregate principal amount of notes repurchased				$ 500,000,000
Repurchases of convertible debt				524,000,000
Call premium				$ 17,000,000
Loss on extinguishment of debt								20,000,000
5.375% Senior Notes due March 2020
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 2,000,000,000
Stated interest rate on debt (as a percent)	5.375%	5.375%				5.375%				5.375%			5.375%
Redemption price, using proceeds from certain equity offerings as a percentage of the principal amount	105.375%	105.375%
5.875% Senior Notes due May 2023
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 3,250,000,000
Stated interest rate on debt (as a percent)	5.875%	5.875%				5.875%				5.875%			5.875%
Redemption price, using proceeds from certain equity offerings as a percentage of the principal amount	105.875%	105.875%
4.50% Senior Notes due May 2023
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 1,500,000,000	€ 1,500
Stated interest rate on debt (as a percent)	4.50%	4.50%				4.50%				4.50%			4.50%
Redemption price, using proceeds from certain equity offerings as a percentage of the principal amount	104.50%	104.50%
6.125% Senior Notes due April 2025
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 3,250,000,000
Stated interest rate on debt (as a percent)	6.125%	6.125%				6.125%				6.125%			6.125%
Redemption price, using proceeds from certain equity offerings as a percentage of the principal amount	106.125%	106.125%
5.375%, 5.875%, 4.50% and 6.125% Senior Unsecured Notes
Debt Instrument [Line Items]
Underwriting fees	$ 114,000,000
Maximum percentage of the aggregate principal amount that may be redeemed with the net proceeds of certain equity offerings	40.00%	40.00%
Redemption price as a percentage of principal amount as per the merger agreement	101.00%	101.00%
5.375%, 5.875%, 4.50% and 6.125% Senior Unsecured Notes | Salix
Debt Instrument [Line Items]
Proceeds from issuance of debt			$ 10,100,000,000
Senior Secured Credit Facilities | Salix
Debt Instrument [Line Items]
Maximum borrowing capacity			5,550,000,000.00
Senior Unsecured Bridge Facility | Salix
Debt Instrument [Line Items]
Maximum borrowing capacity			9,600,000,000.00
Incremental Term Loan B Facility | Salix
Debt Instrument [Line Items]
Maximum borrowing capacity			15,250,000,000.00
Incremental Term Loan Facilities | Salix
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 5,150,000,000.00									$ 5,150,000,000.00
Series F Tranche B Term Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity												4,150,000,000.00
Series A-4 Tranche Term Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity												$ 1,000,000,000.00
Amended and Restated Commitment Letter | Salix
Debt Instrument [Line Items]
Deferred financing costs expensed								$ 72,000,000
Convertible Debt | 2.75% Convertible Notes Due May 2015
Debt Instrument [Line Items]
Stated interest rate on debt (as a percent)								2.75%				2.75%
Convertible debt												$ 345,000,000
Average conversion price							$ 3,729.46
Convertible Debt | 2.75% Convertible Notes Due May 2015 | Salix
Debt Instrument [Line Items]
Stated interest rate on debt (as a percent)												2.75%
Convertible Debt | 1.5% Convertible Notes Due March 2019
Debt Instrument [Line Items]
Stated interest rate on debt (as a percent)								1.50%				1.50%
Convertible debt												$ 690,000,000
Average conversion price						$ 2,628.68	$ 2,663.26
Convertible Debt | 1.5% Convertible Notes Due March 2019 | Salix
Debt Instrument [Line Items]
Stated interest rate on debt (as a percent)												1.50%