Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Offsetting [Abstract]
Derivative assets, gross amounts of recognized assets/liabilities	$ 1	$ 12
Derivative assets, gross amounts offset on the Condensed Consolidated Balance Sheet	0	0
Derivative assets, net amounts of assets/liabilities presented on the Condensed Consolidated Balance Sheet	1	12
Derivative assets, gross amounts not offset on the Condensed Consolidated Balance Sheet, financial instruments	0	0
Derivative assets, gross amounts not offset on the Condensed Consolidated Balance Sheet, collateral	(1)	(10)
Derivative assets, net amount	0	2
Total assets, gross amounts of recognized assets/liabilities	1	12
Total assets, gross amounts offset on the Condensed Consolidated Balance Sheet	0	0
Total assets, net amounts of assets/liabilities presented on the Condensed Consolidated Balance Sheet	1	12
Total assets, gross amounts not offset on the Condensed Consolidated Balance Sheet, financial instruments	0	0
Total assets, gross amounts not offset on the Condensed Consolidated Balance Sheet, collateral	(1)	(10)
Total assets, net amount	0	2
Derivative liabilities, gross amounts of recognized assets/liabilities	7	4
Derivative liabilities, gross amounts offset on the Condensed Consolidated Balance Sheet	0	0
Derivative liabilities, net amounts of assets/liabilities presented on the Condensed Consolidated Balance Sheet	7	4
Derivative liabilities, gross amounts not offset on the Condensed Consolidated Balance Sheet, financial instruments	0	0
Derivative liabilities, gross amounts not offset on the Condensed Consolidated Balance Sheet, collateral	(2)	0
Derivative liabilities, net amount	5	4
Securities sold under agreement to repurchase, gross amounts of recognized assets/liabilities	931
Securities sold under agreements to repurchase, gross amounts offset on the Condensed Consolidated Balance Sheet - gross amounts offset on the consolidated balance sheet	0
Securities sold under agreements to repurchase, net amounts of assets/liabilities presented on the Condensed Consolidated Balance Sheet	931
Securities sold under agreement to repurchase, gross amounts not offset on the Condensed Consolidated Balance Sheet, financial instruments	0
Securities sold under agreement to repurchase, gross amounts not offset on the Condensed Consolidated Balance Sheet, collateral	(931)
Securities sold under agreements to repurchase, net amount	0
Total liabilities, gross amounts of recognized assets/liabilities	938	4
Total liabilities, gross amounts offset on the Condensed Consolidated Balance Sheet	0	0
Total liabilities, net amounts of assets/liabilities presented on the Condensed Consolidated Balance Sheet	938	4
Total liabilities, gross amounts not offset on the Condensed Consolidated Balance Sheet, financial instruments	0	0
Total liabilities, gross amounts not offset on the Condensed Consolidated Balance Sheet, collateral	(933)	0
Total liabilities, net amount	5	4
Derivative liabilities with no offsetting arrangements	$ 4	4
Derivative assets with no offsetting arrangements		$ 1