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Business Combinations - PCD Loans Acquired (Details) - USD ($) $ in Millions		3 Months Ended
	Mar. 20, 2023	Mar. 31, 2024	Mar. 31, 2023
Business Acquisition [Line Items]
ACL at acquisition		$ 0	$ (13)
Signature Bridge Bank
Business Acquisition [Line Items]
Par value (UPB)	$ 583
ACL at acquisition	(13)
Non-credit (discount)	(76)
Fair value	$ 494

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Amount, excluding accrued interest, of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount at par value of financing receivable purchased with credit deterioration.

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Amount of discount (premium) attributable to other factors on financing receivable purchased with credit deterioration.

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