Netting Arrangements (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Assets:
Derivative assets, gross amount	$ 826	$ 408
Derivative assets, gross amount offset	63	(237)
Derivative assets, net amount presented in our condensed consolidated balance sheets	889	171
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	(461)	(133)
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	0	0
Derivative assets, net amount	428	38
Securities purchased under agreements to resell, gross amount	49,191	64,843
Securities purchased under agreements to resell, gross amount offset	0	0
Securities purchased under agreements to resell, under master netting arrangements,	49,191	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	(49,191)	(64,843)
Securities purchased under agreements to resell, net amount	0	0
Total assets, gross amount	50,017	65,251
Total assets, gross amount offset	63	(237)
Total assets, net amount presented in our condensed consolidated balance sheets	50,080	65,014
Total assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	(461)	(133)
Total assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	(49,191)	(64,843)
Total assets, net amount	428	38
Liabilities:
Derivative liabilities, gross amount	(4,117)
Derivative liabilities, gross amount offset	3,540
Derivative liabilities, net amount presented in our condensed consolidated balance sheets	(577)
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	461
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	79
Derivative liabilities, net amount	(37)
Securities sold under agreements to repurchase, gross	(1,466)
Securities sold under agreements to repurchase, gross amount offset	0
Securities sold under agreements to repurchase, net amount presented in our condensed consolidated balance sheets	(1,466)
Securities sold under agreements to repurchase, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	0
Securities sold under agreements to repurchase, collateral	1,461
Securities sold under agreements to repurchase, net amount	(5)
Total liabilities, gross amount	(5,583)	(1,385)
Total liabilities, gross amount offset	3,540	1,173
Total liabilities, net amount presented in our condensed consolidated balance sheets	(2,043)	(212)
Total liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	461	133
Total liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	1,540	66
Total liabilities, net amount	(42)	(13)
Mortgage commitment derivatives
Assets:
Derivative assets, gross amount	631	169
Derivative assets, gross amount offset	0	0
Derivative assets, net amount presented in our condensed consolidated balance sheets	631	169
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	(461)	(133)
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	0	0
Derivative assets, net amount	170	36
Liabilities:
Derivative liabilities, gross amount	(498)	(197)
Derivative liabilities, gross amount offset	0	0
Derivative liabilities, net amount presented in our condensed consolidated balance sheets	(498)	(197)
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	461	133
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	0	56
Derivative liabilities, net amount	(37)	(8)
Over the Counter | Risk Management Derivatives
Assets:
Derivative assets, gross amount	195	239
Derivative assets, gross amount offset	59	(237)
Derivative assets, net amount presented in our condensed consolidated balance sheets	254	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	254	2
Liabilities:
Derivative liabilities, gross amount	(3,619)	(1,188)
Derivative liabilities, gross amount offset	3,619	1,183
Derivative liabilities, net amount presented in our condensed consolidated balance sheets	0	(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	0	(5)
Exchange Cleared | Risk Management Derivatives
Assets:
Derivative assets, gross amount	0	0
Derivative assets, gross amount offset	4	0
Derivative assets, net amount presented in our condensed consolidated balance sheets	4	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	4	0
Liabilities:
Derivative liabilities, gross amount	0	0
Derivative liabilities, gross amount offset	(79)	(10)
Derivative liabilities, net amount presented in our condensed consolidated balance sheets	(79)	(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	79	10
Derivative liabilities, net amount	$ 0	$ 0