SHAREHOLDERS' EQUITY (Details) - USD ($)			12 Months Ended
	Jun. 10, 2015	Mar. 27, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Nov. 18, 2015	Nov. 20, 2014	Nov. 21, 2013
Equity, Class of Treasury Stock [Line Items]
Aggregate repurchase price of the entity's common shares repurchased			$ 0	$ 72,000,000	$ 0
Issuance of common stock (in shares)		7,286,432
Price per share (dollars per share)		$ 199.00
Issuance of common shares		$ 1,450,000,000		$ 1,482,000,000
Issuance costs		$ 18,000,000
Maximum additional purchase option as a percentage of shares issued in IPO		15.00%
Dendreon Corporation
Equity, Class of Treasury Stock [Line Items]
Equity issued (in shares)	213,610
Equity issued	$ 50,000,000
2015 Securities Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Authorized amount of shares for repurchase						$ 3,000,000,000.00
Common shares repurchased (in shares)			0	0
2014 Securities Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Authorized amount of shares for repurchase							$ 2,000,000,000.00
Common shares repurchased (in shares)				424,215	0
Aggregate repurchase price of the entity's common shares repurchased				$ 72,000,000
Excess of repurchase price over carrying value of securities repurchased, charged to accumulated deficit				$ 60,000,000
2013 Securities Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Authorized amount of shares for repurchase								$ 1,500,000,000.00
Common shares repurchased (in shares)					0