Consolidated Statements of Changes in Partnership Capital Subject to Mandatory Redemption - USD ($) $ in Millions	Total	Limited Partnership Capital [Member]	Subordinated Limited Partnership Capital [Member]	General Partnership Capital [Member]
Reserve for anticipated withdrawals	$ (407)	$ (110)	$ (43)	$ (254)
TOTAL PARTNERSHIP CAPITAL SUBJECT TO MANDATORY REDEMPTION at Dec. 31, 2019	3,364	1,359	566	1,439
Partnership capital subject to mandatory redemption, net of reserve for anticipated withdrawals at Dec. 31, 2019	2,957	1,249	523	1,185
Partnership loans outstanding at beginning of year at Dec. 31, 2019	360	0	4	356
Total partnership capital, including capital financed with partnership loans, net of reserve for anticipated withdrawals at Dec. 31, 2019	3,317	1,249	527	1,541
Issuance of partnership interests	213	1	49	163
Redemption of partnership interests	(244)	(13)	(37)	(194)
Income allocated to partners	1,285	189	149	947
Distributions	(641)	(64)	(93)	(484)
Total partnership capital, including capital financed with partnership loans at Dec. 31, 2020	3,930	1,362	595	1,973
Partnership loans outstanding at end of year at Dec. 31, 2020	(341)	0	(1)	(340)
TOTAL PARTNERSHIP CAPITAL SUBJECT TO MANDATORY REDEMPTION at Dec. 31, 2020	3,589	1,362	594	1,633
Partnership capital subject to mandatory redemption, net of reserve for anticipated withdrawals at Dec. 31, 2020	3,075	1,237	538	1,300
Total partnership capital, including capital financed with partnership loans, net of reserve for anticipated withdrawals at Dec. 31, 2020	3,416	1,237	539	1,640
Reserve for anticipated withdrawals	(514)	(125)	(56)	(333)
Issuance of partnership interests	288	5	61	222
Redemption of partnership interests	(313)	(17)	(19)	(277)
Income allocated to partners	1,605	208	189	1,208
Distributions	(920)	(72)	(130)	(718)
Total partnership capital, including capital financed with partnership loans at Dec. 31, 2021	4,076	1,361	640	2,075
Partnership loans outstanding at end of year at Dec. 31, 2021	(321)	0	0	(321)
TOTAL PARTNERSHIP CAPITAL SUBJECT TO MANDATORY REDEMPTION at Dec. 31, 2021	3,755	1,361	640	1,754
Partnership capital subject to mandatory redemption, net of reserve for anticipated withdrawals at Dec. 31, 2021	3,235	1,225	581	1,429
Total partnership capital, including capital financed with partnership loans, net of reserve for anticipated withdrawals at Dec. 31, 2021	3,556	1,225	581	1,750
Reserve for anticipated withdrawals	(520)	(136)	(59)	(325)
Issuance of partnership interests	339	4	58	277
Redemption of partnership interests	(352)	(17)	(21)	(314)
Income allocated to partners	1,404	165	165	1,074
Distributions	(793)	(65)	(112)	(616)
Total partnership capital, including capital financed with partnership loans at Dec. 31, 2022	4,154	1,312	671	2,171
Partnership loans outstanding at end of year at Dec. 31, 2022	(335)	0	0	(335)
TOTAL PARTNERSHIP CAPITAL SUBJECT TO MANDATORY REDEMPTION at Dec. 31, 2022	3,819	1,312	671	1,836
Partnership capital subject to mandatory redemption, net of reserve for anticipated withdrawals at Dec. 31, 2022	3,355	1,212	618	1,525
Reserve for anticipated withdrawals	$ (464)	$ (100)	$ (53)	$ (311)