CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Units	Capital - Common Unitholders	Accumulated Other Comprehensive Income (Loss)	Total Capital - Common Units	Capital - Series A Preferred Units	Capital - Series B Preferred Units	Noncontrolling Interests
Balance at Dec. 31, 2016	$ 16,485,735		$ 5,506,375	$ (49,096)	$ 5,457,279	$ 332,988	$ 149,566	$ 10,545,902
Balance (in units) at Dec. 31, 2016		452,380,335
Increase (Decrease) in Partners' Capital
Net Income (Loss)	776,961		259,343		259,343	5,822	2,519	509,277
Other Comprehensive Income (Loss)- Foreign Currency Translation (Net of Tax)	16,576			5,744	5,744			10,832
Changes in Consolidation	(71,657)							(71,657)
Transfer of interests under common control and Other (See Note 15 Equity)			12,269	(1,988)	10,281			(10,281)
Exchange of KKR Holdings L.P. Units and Other Securities to KKR & Co. L.P. Common Units			43,564	(388)	43,176			(43,176)
Exchange of KKR Holdings L.P. Units and Other Securities to KKR & Co. L.P. Common Units (in units)		3,190,630
Tax Effects Resulting from Exchange of KKR Holdings L.P. Units and delivery of KKR & Co. L.P. Common Units and Other	1,969		1,802	167	1,969
Equity-Based and Other Non-Cash Compensation	111,036		49,943		49,943			61,093
Capital Contributions	528,833							528,833
Capital Distributions	(343,083)		(72,381)		(72,381)	(5,822)	(2,519)	(262,361)
Balance at Mar. 31, 2017	17,506,370		5,800,915	(45,561)	5,755,354	332,988	149,566	11,268,462
Balance (in units) at Mar. 31, 2017		455,570,965
Balance at Dec. 31, 2016	632,348
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income (Loss)	20,933
Capital Contributions	128,499
Capital Distributions	(352)
Balance at Mar. 31, 2017	781,428
Balance at Dec. 31, 2017	20,052,260		6,722,863	(19,481)	6,703,382	332,988	149,566	12,866,324
Balance (in units) at Dec. 31, 2017		486,174,736
Increase (Decrease) in Partners' Capital
Net Income (Loss)	577,220		170,102		170,102	5,822	2,519	398,777
Other Comprehensive Income (Loss)- Foreign Currency Translation (Net of Tax)	3,624			4,351	4,351			(727)
Exchange of KKR Holdings L.P. Units and Other Securities to KKR & Co. L.P. Common Units			51,221	(132)	51,089			(51,089)
Exchange of KKR Holdings L.P. Units and Other Securities to KKR & Co. L.P. Common Units (in units)		3,067,306
Tax Effects Resulting from Exchange of KKR Holdings L.P. Units and delivery of KKR & Co. L.P. Common Units and Other	4,222		4,205	17	4,222
Equity-Based and Other Non-Cash Compensation	100,491		67,796		67,796			32,695
Capital Contributions	1,270,723				0			1,270,723
Capital Distributions	(930,232)		(82,757)		(82,757)	(5,822)	(2,519)	(839,134)
Balance at Mar. 31, 2018	21,078,308		$ 6,933,430	$ (15,245)	$ 6,918,185	$ 332,988	$ 149,566	$ 13,677,569
Balance (in units) at Mar. 31, 2018		489,242,042
Balance at Dec. 31, 2017	610,540
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income (Loss)	25,674
Capital Contributions	56,950
Capital Distributions	(2,534)
Balance at Mar. 31, 2018	$ 690,630