Summary of Significant Accounting Policies - Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents [Roll Forward]
Purchases of invested margin deposits	$ (1,431)	$ (1,644)
Proceeds from sales of invested margin deposits (within investing activities)	3,815	2,222
Net cash provided by investing activities	2,843	1,544
Change in cash and cash equivalent margin deposits and guaranty funds (within financing activities)		7,780
Net cash provided by/(used in) financing activities	19,238	5,262
Net increase in cash and cash equivalents, restricted cash and cash equivalents, and cash and cash equivalent margin deposits and guaranty funds	23,787	8,413
Cash and cash equivalents, restricted cash and cash equivalents, and cash and cash equivalent margin deposits and guaranty funds at beginning of period	147,976	83,619
Cash and cash equivalents, restricted cash and cash equivalents, and cash and cash equivalent margin deposits and guaranty funds at end of period	$ 171,763	92,032
As Previously Presented
Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents [Roll Forward]
Purchases of invested margin deposits		0
Proceeds from sales of invested margin deposits (within investing activities)		0
Net cash provided by investing activities		966
Change in cash and cash equivalent margin deposits and guaranty funds (within financing activities)		0
Net cash provided by/(used in) financing activities		(2,518)
Net increase in cash and cash equivalents, restricted cash and cash equivalents, and cash and cash equivalent margin deposits and guaranty funds		55
Cash and cash equivalents, restricted cash and cash equivalents, and cash and cash equivalent margin deposits and guaranty funds at beginning of period		1,991
Cash and cash equivalents, restricted cash and cash equivalents, and cash and cash equivalent margin deposits and guaranty funds at end of period		2,046
Adjustment
Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents [Roll Forward]
Purchases of invested margin deposits		(1,644)
Proceeds from sales of invested margin deposits (within investing activities)		2,222
Net cash provided by investing activities		578
Change in cash and cash equivalent margin deposits and guaranty funds (within financing activities)		7,780
Net cash provided by/(used in) financing activities		7,780
Net increase in cash and cash equivalents, restricted cash and cash equivalents, and cash and cash equivalent margin deposits and guaranty funds		8,358
Cash and cash equivalents, restricted cash and cash equivalents, and cash and cash equivalent margin deposits and guaranty funds at beginning of period		81,628
Cash and cash equivalents, restricted cash and cash equivalents, and cash and cash equivalent margin deposits and guaranty funds at end of period		$ 89,986