Netting Arrangements (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Assets:
Derivative assets, gross amount	$ 659	$ 408
Derivative assets, gross amount offset	(163)	(237)
Derivative assets, net amount presented in our condensed consolidated balance sheets	496	171
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	(307)	(133)
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	(1)	0
Derivative assets, net amount	188	38
Securities purchased under agreements to resell, gross amount	47,050	64,843
Securities purchased under agreements to resell, gross amount offset	0	0
Securities purchased under agreements to resell, under master netting arrangements,	47,050	64,843
Securities purchased under agreements to resell, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	0	0
Securities purchased under agreements to resell, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	(47,050)	(64,843)
Securities purchased under agreements to resell, net amount	0	0
Total assets, gross amount	47,709	65,251
Total assets, gross amount offset	(163)	(237)
Total assets, net amount presented in our condensed consolidated balance sheets	47,546	65,014
Total assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	307	133
Total assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	(47,051)	(64,843)
Total assets, net amount	188	38
Liabilities:
Total liabilities, gross amount	(5,691)	(1,385)
Total liabilities, gross amount offset	4,833	1,173
Total liabilities, net amount presented in our condensed consolidated balance sheets	(858)	(212)
Total liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	307	133
Total liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	3	66
Total liabilities, net amount	(548)	(13)
Mortgage commitment derivatives
Assets:
Derivative assets, gross amount	420	169
Derivative assets, gross amount offset	0	0
Derivative assets, net amount presented in our condensed consolidated balance sheets	420	169
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	(307)	(133)
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	(1)	0
Derivative assets, net amount	112	36
Liabilities:
Derivative liabilities, gross amount	(814)	(197)
Derivative liabilities, gross amount offset	0	0
Derivative liabilities, net amount presented in our condensed consolidated balance sheets	(814)	(197)
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	307	133
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	2	56
Derivative liabilities, net amount	(505)	(8)
Over the Counter | Risk Management Derivatives
Assets:
Derivative assets, gross amount	239	239
Derivative assets, gross amount offset	(233)	(237)
Derivative assets, net amount presented in our condensed consolidated balance sheets	6	2
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	0	0
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	0	0
Derivative assets, net amount	6	2
Liabilities:
Derivative liabilities, gross amount	(4,877)	(1,188)
Derivative liabilities, gross amount offset	4,834	1,183
Derivative liabilities, net amount presented in our condensed consolidated balance sheets	(43)	(5)
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	0	0
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	0	0
Derivative liabilities, net amount	(43)	(5)
Exchange Cleared | Risk Management Derivatives
Assets:
Derivative assets, gross amount	0	0
Derivative assets, gross amount offset	70	0
Derivative assets, net amount presented in our condensed consolidated balance sheets	70	0
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	0	0
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	0	0
Derivative assets, net amount	70	0
Liabilities:
Derivative liabilities, gross amount	0	0
Derivative liabilities, gross amount offset	(1)	(10)
Derivative liabilities, net amount presented in our condensed consolidated balance sheets	(1)	(10)
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	0	0
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	1	10
Derivative liabilities, net amount	$ 0	$ 0