CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (9,980)	$ 92,928	$ 55,010	$ 136,165
Other comprehensive income (loss):
Net unrealized gains (losses) on derivatives	101		195
Net unrealized gains (losses) on derivatives		10,793		5,629
Change in Supplemental Executive Retirement Plan obligation and other	68	78	137	182
Foreign currency translation adjustment	(745)	(11,327)	(83)	(3,675)
Reclassification adjustment realized in net income (loss)	0	17,683	0	17,808
Total other comprehensive income (loss)	(576)	17,227	249	19,944
Total comprehensive income (loss)	(10,556)	110,155	55,259	156,109
Total comprehensive income (loss) attributable to noncontrolling interests	(3,617)	(2,986)	(7,137)	(5,991)
Total comprehensive income (loss) attributable to HCP, Inc.	$ (14,173)	$ 107,169	$ 48,122	$ 150,118