Federal Funds Sold and Securities Financing Activities (Tables)

12 Months Ended

Dec. 31, 2017

Securities Purchased under Agreements to Resell [Abstract]

Schedule of Resale Agreements [Table Text Block]

Fed Funds sold and securities borrowed or purchased under agreements to resell were as follows:



(Dollars in millions)	December 31, 2017		December 31, 2016
Fed funds sold		$65		$58
Securities borrowed	298		270
Securities purchased under agreements to resell	1,175		979
Total Fed funds sold and securities borrowed or purchased under agreements to resell		$1,538		$1,307

Securities sold under agreements to repurchase remaining contractual maturity [Table Text Block]

Securities sold under agreements to repurchase are accounted for as secured borrowings. The following table presents the Company’s related activity, by collateral type and remaining contractual maturity:



	December 31, 2017								December 31, 2016
(Dollars in millions)	Overnight and Continuous		Up to 30 days		30-90 days		Total		Overnight and Continuous		Up to 30 days		30-90 days		Total
U.S. Treasury securities		$95		$—		$—		$95		$27		$—		$—		$27
Federal agency securities	101		15		—		116		288		24		—		312
MBS - agency	694		135		—		829		793		51		—		844
CP	19		—		—		19		49		—		—		49
Corporate and other debt securities	316		88		40		444		311		50		40		401
Total securities sold under agreements to repurchase		$1,225		$238		$40		$1,503		$1,468		$125		$40		$1,633

Netting of Financial Instruments - Repurchase Agreements [Table Text Block]

The following table includes the amount of collateral pledged or received related to exposures subject to enforceable MRAs. While these agreements are typically over-collateralized, the amount of collateral presented in this table is limited to the amount of the related recognized asset or liability for each counterparty.



(Dollars in millions)	Gross Amount		Amount Offset		Net Amount Presented in Consolidated Balance Sheets			Held/Pledged Financial Instruments		Net Amount
December 31, 2017
Financial assets:
Securities borrowed or purchased under agreements to resell		$1,473		$—		$1,473	¹		$1,462		$11
Financial liabilities:
Securities sold under agreements to repurchase	1,503		—		1,503			1,503		—

December 31, 2016
Financial assets:
Securities borrowed or purchased under agreements to resell		$1,249		$—		$1,249	¹		$1,241		$8
Financial liabilities:
Securities sold under agreements to repurchase	1,633		—		1,633			1,633		—

¹Excludes $65 million and $58 million of Fed Funds sold, which are not subject to a master netting agreement at December 31, 2017 and 2016, respectively