Total Equity - Components of Period Changes in OCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
After-tax Gain (Loss)
Net OCI	$ (754)	$ (182)	$ (2,798)	$ (803)
Foreign Currency Translation Adjustment Attributable to Parent
After-tax Gain (Loss)
OCI activity	(207)	(65)	(490)	(165)
Reclassified to earnings	0	0	59	0
Net OCI	(207)	(65)	(431)	(165)
Foreign Currency Translation Adjustment Including Noncontrolling Interest
Pre-tax Gain (Loss)
OCI activity	(85)	(14)	(279)	(106)
Reclassified to earnings	0	0	0	0
Net OCI	(85)	(14)	(279)	(106)
Income Tax Benefit (Provision)
OCI activity	(183)	(64)	(441)	(150)
Reclassified to earnings	0	0	59	0
Net OCI	(183)	(64)	(382)	(150)
After-tax Gain (Loss)
OCI activity	(268)	(78)	(720)	(256)
Reclassified to earnings	0	0	59	0
Net OCI	(268)	(78)	(661)	(256)
Foreign Currency Translation Adjustment Attributable to Noncontrolling Interest
After-tax Gain (Loss)
OCI activity	(61)	(13)	(230)	(91)
Reclassified to earnings	0	0	0	0
Net OCI	(61)	(13)	(230)	(91)
Change in Net Unrealized Gains (Losses) on AFS Securities Attributable to Parent
After-tax Gain (Loss)
OCI activity	(1,300)	(243)	(4,724)	(879)
Reclassified to earnings	(7)	(13)	(54)	(160)
Net OCI	(1,307)	(256)	(4,778)	(1,039)
Change in Net Unrealized Gains (Losses) on AFS Securities Including Noncontrolling Interest
Pre-tax Gain (Loss)
OCI activity	(1,698)	(317)	(6,169)	(1,146)
Reclassified to earnings	(9)	(17)	(71)	(209)
Net OCI	(1,707)	(334)	(6,240)	(1,355)
Income Tax Benefit (Provision)
OCI activity	398	74	1,445	267
Reclassified to earnings	2	4	17	49
Net OCI	400	78	1,462	316
After-tax Gain (Loss)
OCI activity	(1,300)	(243)	(4,724)	(879)
Reclassified to earnings	(7)	(13)	(54)	(160)
Net OCI	(1,307)	(256)	(4,778)	(1,039)
Change in Net Unrealized Gains (Losses) on AFS Securities Attributable to Noncontrolling Interest
After-tax Gain (Loss)
OCI activity	0	0	0	0
Reclassified to earnings	0	0	0	0
Net OCI	0	0	0	0
Pension, Postretirement and Other Attributable to Parent
After-tax Gain (Loss)
OCI activity	1	0	(1)	8
Reclassified to earnings	4	5	14	14
Net OCI	5	5	13	22
Pension, Postretirement and Other Including Noncontrolling Interest
Pre-tax Gain (Loss)
OCI activity	1	0	(1)	8
Reclassified to earnings	6	7	17	21
Net OCI	7	7	16	29
Income Tax Benefit (Provision)
OCI activity	0	0	0	0
Reclassified to earnings	(2)	(2)	(3)	(7)
Net OCI	(2)	(2)	(3)	(7)
After-tax Gain (Loss)
OCI activity	1	0	(1)	8
Reclassified to earnings	4	5	14	14
Net OCI	5	5	13	22
Pension, Postretirement and Other Attributable to Noncontrolling Interest
After-tax Gain (Loss)
OCI activity	0	0	0	0
Reclassified to earnings	0	0	0	0
Net OCI	0	0	0	0
Change in Net DVA Attributable to Parent
After-tax Gain (Loss)
OCI activity	772	132	2,541	416
Reclassified to earnings	0	6	(1)	27
Net OCI	772	138	2,540	443
Change in Net DVA Including Noncontrolling Interest
Pre-tax Gain (Loss)
OCI activity	1,082	187	3,474	591
Reclassified to earnings	0	9	(1)	36
Net OCI	1,082	196	3,473	627
Income Tax Benefit (Provision)
OCI activity	(266)	(46)	(845)	(148)
Reclassified to earnings	0	(3)	0	(9)
Net OCI	(266)	(49)	(845)	(157)
After-tax Gain (Loss)
OCI activity	816	141	2,629	443
Reclassified to earnings	0	6	(1)	27
Net OCI	816	147	2,628	470
Change in Net DVA Attributable to Noncontrolling Interest
After-tax Gain (Loss)
OCI activity	44	9	88	27
Reclassified to earnings	0	0	0	0
Net OCI	$ 44	$ 9	$ 88	$ 27