Amount, after the effects of master netting arrangements, of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes purchases of participations in pools of securities that are subject to a resale agreement, assets not subject to a master netting arrangement and not elected to be offset.

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Name:	us-gaap_SecuritiesPurchasedUnderAgreementsToResell
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Subsequent Events (Details) - Subsequent Event - USD ($) $ in Millions	Feb. 28, 2019	Feb. 01, 2019	Jan. 03, 2019
Pacific Union Financial, LLC
Subsequent Event [Line Items]
Purchase price from cash payment		$ 128
Seterus Mortgage Servicing Platform And Related IBM Assets
Subsequent Event [Line Items]
Purchase price from cash payment	$ 8
GSE Mortgages
Subsequent Event [Line Items]
Securities purchased under agreements			$ 24,000
Mortgages
Subsequent Event [Line Items]
Securities purchased under agreements			$ 24,000