Netting Arrangements (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Assets:
Derivative assets, gross amount	$ 657	$ 332
Derivative assets, gross amount offset	(206)	(199)
Derivative assets, net amount presented in our condensed consolidated balance sheets	451	133
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	(202)	(24)
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	(36)	(1)
Derivative assets, net amount	213	108
Securities purchased under agreements to resell, gross amount	33,450	45,650
Securities purchased under agreements to resell, gross amount offset	0	0
Securities purchased under agreements to resell, net amount presented in our condensed consolidated balance sheets	33,450	45,650
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	(33,450)	(45,650)
Securities purchased under agreements to resell, net amount	0	0
Total assets, gross amount	34,107	45,982
Total assets, gross amount offset	(206)	(199)
Total assets, net amount presented in our condensed consolidated balance sheets	33,901	45,783
Total assets, under the master netting arrangements, not offset in our consolidated balance sheets, financial instruments	(202)	(24)
Total assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	(33,486)	(45,651)
Total assets, net amount	213	108
Liabilities:
Total liabilities, gross amount	(3,194)	(1,387)
Total liabilities, gross amount offset	2,641	1,242
Total liabilities, net amount presented in our condensed consolidated balance sheets	(553)	(145)
Total liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	202	24
Total liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	77	113
Total liabilities, net amount	(274)	(8)
Derivative assets not subject to enforceable master netting arrangements	48	44
Derivative liabilities not subject to enforceable master netting arrangements	(87)	(7)
Risk management derivatives | OTC risk management derivatives
Assets:
Derivative assets, gross amount	416	277
Derivative assets, gross amount offset	(406)	(266)
Derivative assets, net amount presented in our condensed consolidated balance sheets	10	11
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	(4)	0
Derivative assets, net amount	6	11
Liabilities:
Derivative liabilities, gross amount	(2,665)	(1,256)
Derivative liabilities, gross amount offset	2,643	1,244
Derivative liabilities, net amount presented in our condensed consolidated balance sheets	(22)	(12)
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	4	10
Derivative liabilities, net amount	(18)	(2)
Risk management derivatives | Cleared risk management derivatives
Assets:
Derivative assets, gross amount	0	0
Derivative assets, gross amount offset	200	67
Derivative assets, net amount presented in our condensed consolidated balance sheets	200	67
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	200	67
Liabilities:
Derivative liabilities, gross amount	0	0
Derivative liabilities, gross amount offset	(2)	(2)
Derivative liabilities, net amount presented in our condensed consolidated balance sheets	(2)	(2)
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	2	2
Derivative liabilities, net amount	0	0
Mortgage commitment derivatives
Assets:
Derivative assets, gross amount	241	55
Derivative assets, gross amount offset	0	0
Derivative assets, net amount presented in our condensed consolidated balance sheets	241	55
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	(202)	(24)
Derivative assets, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	(32)	(1)
Derivative assets, net amount	7	30
Liabilities:
Derivative liabilities, gross amount	(529)	(131)
Derivative liabilities, gross amount offset	0	0
Derivative liabilities, net amount presented in our condensed consolidated balance sheets	(529)	(131)
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, financial instruments	202	24
Derivative liabilities, under master netting arrangements, amounts not offset in our condensed consolidated balance sheets, collateral	71	101
Derivative liabilities, net amount	$ (256)	$ (6)