Netting Arrangements (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Assets:
Derivative assets, gross amount	$ 326,000,000	$ 408,000,000
Derivative asset, gross amount offset	(154,000,000)	(237,000,000)
Derivative assets, net amount presented in our consolidated balance sheets	172,000,000	171,000,000
Derivative assets, under master netting arrangements, amounts not offset in our consolidated balance sheets, financial instruments	(50,000,000)	(133,000,000)
Derivative assets, under master netting arrangements, amounts not offset in our consolidated balance sheets, collateral	(12,000,000)	0
Derivative assets, net amount	110,000,000	38,000,000
Securities purchased under agreements to resell, or similar arrangements, gross amount	69,415,000,000	64,843,000,000
Securities purchased under agreements to resell or similar arrangements, gross amount offset	0	0
Securities purchased under agreements to resell or similar arrangements, net amount presented in our consolidated balance sheets	69,415,000,000	64,843,000,000
Securities purchased under agreements to resell, under master netting arrangement, amounts not offset in our consolidated balance sheets, financial instruments	0	0
Securities purchased under agreements to resell or similar arrangements, under master netting arrangements, amounts not offset in our consolidated balance sheets, collateral	(69,415,000,000)	(64,843,000,000)
Securities purchased under agreements to resell or similar arrangements, net amount	0	0
Total assets, gross amount	69,741,000,000	65,251,000,000
Total assets, gross amount offset	(154,000,000)	(237,000,000)
Total assets, net amount presented in the consolidated balance sheets	69,587,000,000	65,014,000,000
Total assets, under the master netting arrangements, not offset in our consolidated balance sheets, financial instruments	(50,000,000)	(133,000,000)
Total assets, under master netting arrangements, not offset in our consolidated balance sheets, collateral	(69,427,000,000)	(64,843,000,000)
Total assets, net amount	110,000,000	38,000,000
Liabilities:
Total liabilities, gross amount	(4,764,000,000)	(1,385,000,000)
Total liabilities, gross amount offset	4,662,000,000	1,173,000,000
Total liabilities, net amount presented in our consolidated balance sheets	(102,000,000)	(212,000,000)
Total liabilities, under master netting arrangements, amounts not offset in our consolidated balance sheets, financial statements	50,000,000	133,000,000
Total liabilities, under master netting arrangements, amounts not offset in our consolidated balance sheets, collateral	7,000,000	66,000,000
Total liabilities, net amount	(45,000,000)	(13,000,000)
Securities received as collateral	69,500,000,000	64,900,000,000
Fair value of securities received as collateral that can be resold or repledged	28,700,000,000	25,600,000,000
Fair value of securities received as collateral that have been resold or repledged	0	0
Derivative asset, not subject to master netting arrangement	3,000,000	0
Derivative liability, not subject to master netting arrangement	66,000,000	21,000,000
Securities purchased under agreements to resell or similar arrangements	14,565,000,000	20,743,000,000
Asset Pledged as Collateral with Right
Assets:
Total assets, under master netting arrangements, not offset in our consolidated balance sheets, collateral	(2,100,000,000)	(2,500,000,000)
Mortgage commitment derivatives
Assets:
Derivative assets, gross amount	89,000,000	169,000,000
Derivative asset, gross amount offset	0	0
Derivative assets, net amount presented in our consolidated balance sheets	89,000,000	169,000,000
Derivative assets, under master netting arrangements, amounts not offset in our consolidated balance sheets, financial instruments	(50,000,000)	(133,000,000)
Derivative assets, under master netting arrangements, amounts not offset in our consolidated balance sheets, collateral	(12,000,000)	0
Derivative assets, net amount	27,000,000	36,000,000
Liabilities:
Derivative liabilities, gross amount	(78,000,000)	(197,000,000)
Derivative liabilities, gross amount offset	0	0
Derivative liabilities, net amount presented in our consolidated balance sheets	(78,000,000)	(197,000,000)
Derivative liabilities, under master netting arrangements, amounts not offset in our consolidated balance sheets, financial instruments	50,000,000	133,000,000
Derivative liabilities, under master netting arrangements, amounts not offset in our consolidated balance sheets, collateral	7,000,000	56,000,000
Derivative liabilities, net amount	(21,000,000)	(8,000,000)
OTC risk management derivatives | Risk management derivatives
Assets:
Derivative assets, gross amount	237,000,000	239,000,000
Derivative asset, gross amount offset	(234,000,000)	(237,000,000)
Derivative assets, net amount presented in our consolidated balance sheets	3,000,000	2,000,000
Derivative assets, under master netting arrangements, amounts not offset in our consolidated balance sheets, financial instruments	0	0
Derivative assets, under master netting arrangements, amounts not offset in our consolidated balance sheets, collateral	0	0
Derivative assets, net amount	3,000,000	2,000,000
Liabilities:
Derivative liabilities, gross amount	(4,686,000,000)	(1,188,000,000)
Derivative liabilities, gross amount offset	4,662,000,000	1,183,000,000
Derivative liabilities, net amount presented in our consolidated balance sheets	(24,000,000)	(5,000,000)
Derivative liabilities, under master netting arrangements, amounts not offset in our consolidated balance sheets, financial instruments	0	0
Derivative liabilities, under master netting arrangements, amounts not offset in our consolidated balance sheets, collateral	0	0
Derivative liabilities, net amount	(24,000,000)	(5,000,000)
Cleared risk management derivatives | Risk management derivatives
Assets:
Derivative assets, gross amount	0	0
Derivative asset, gross amount offset	80,000,000	0
Derivative assets, net amount presented in our consolidated balance sheets	80,000,000	0
Derivative assets, under master netting arrangements, amounts not offset in our consolidated balance sheets, financial instruments	0	0
Derivative assets, under master netting arrangements, amounts not offset in our consolidated balance sheets, collateral	0	0
Derivative assets, net amount	80,000,000	0
Liabilities:
Derivative liabilities, gross amount	0	0
Derivative liabilities, gross amount offset	0	(10,000,000)
Derivative liabilities, net amount presented in our consolidated balance sheets	0	(10,000,000)
Derivative liabilities, under master netting arrangements, amounts not offset in our consolidated balance sheets, financial instruments	0	0
Derivative liabilities, under master netting arrangements, amounts not offset in our consolidated balance sheets, collateral	0	10,000,000
Derivative liabilities, net amount	0	0
Cash and Cash Equivalents
Liabilities:
Securities purchased under agreements to resell or similar arrangements	45,200,000,000	29,100,000,000
Restricted Cash and Cash Equivalent
Liabilities:
Securities purchased under agreements to resell or similar arrangements	$ 9,700,000,000	$ 15,000,000,000