Partners' Capital and Distributions - Exchange Rights and Shares Activity (Details) - shares	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Class A Shares
Activity for Class A shares, Class B shares and Class C shares
Balance, beginning of period (shares)	184,240,079	182,138,592	159,485,588	159,485,588
Exchange Right exercises (shares)		2,101,487	7,331,745
Other (shares)	20,099
Balance, end of period (shares)	184,260,178	184,240,079	166,817,333	159,485,588
Class B Shares
Activity for Class A shares, Class B shares and Class C shares
Balance, beginning of period (shares)	63,037,384	65,785,702	119,512,666	119,604,338
Conversion of AAP Management Units (shares)	35,349	559,768
Exchange Right exercises (shares)		(2,101,487)	(7,331,745)
Redemption Right exercises (shares)	(40,679)	(1,206,599)	(12,193,771)	(91,672)
Balance, end of period (shares)	63,032,054	63,037,384	99,987,150	119,512,666
Class C Shares
Activity for Class A shares, Class B shares and Class C shares
Balance, beginning of period (shares)	550,769,169	549,538,139	517,256,766	516,938,280
Redemption Right exercises (shares)	40,679	1,206,599	12,193,771	91,672
Other (shares)	27,292	24,431	603,456	226,814
Balance, end of period (shares)	550,837,140	550,769,169	530,053,993	517,256,766