Securities Financing Agreements (Tables)

12 Months Ended

Dec. 31, 2018

Transfers and Servicing [Abstract]

Secured Borrowings by Contractual Maturity and Class of Collateral Pledged

he following tables present the gross obligations for securities sold under agreements to repurchase and securities loaned by remaining contractual maturity and class of collateral pledged as of December 31, 2018 and December 31, 2017.

	December 31, 2018
	Overnight and		Up to		31 - 90		Greater than
(Dollars in millions)	continuous		30 days		days		90 days		Total
Securities sold under agreements to repurchase:
U.S. Treasury securities	$	9,416	$	2,945	$	2,991	$	335	$	15,687
U.S. agency securities	264		—		55		—		319
Money market securities	—		—		49		—		49
Asset-backed securities	—		—		282		—		282
Mortgage-backed securities	9,803		1,640		7,569		—		19,012
Corporate bonds	682		130		1,227		—		2,039
Municipal securities	115		245		188		—		548
Equities	387		220		255		—		862
Total	$	20,667	$	5,180	$	12,616	$	335	$	38,798
Securities loaned:
Corporate bonds	$	1	$	—	$	—	$	—	$	1
Equities	92		—		—		—		92
Total	$	93	$	—	$	—	$	—	$	93

	December 31, 2017
	Overnight and		Up to		31 - 90		Greater than
(Dollars in millions)	continuous		30 days		days		90 days		Total
Securities sold under agreements to repurchase:
U.S. Treasury securities	$	8,244	$	2,370	$	1,046	$	1,158	$	12,818
U.S. agency securities	115		38		63		—		216
Other sovereign government obligations	—		—		4		—		4
Money market securities	1		—		6		—		7
Asset-backed securities	32		—		164		—		196
Mortgage-backed securities	8,322		4,972		5,859		250		19,403
Corporate bonds	580		620		1,125		—		2,325
Municipal securities	283		—		276		—		559
Equities	416		376		189		—		981
Total	$	17,993	$	8,376	$	8,732	$	1,408	$	36,509
Securities loaned:
Corporate bonds	$	—	$	322	$	—	$	—	$	322
Equities	446		10		101		—		557
Total	$	446	$	332	$	101	$	—	$	879

Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]

Offsetting Liabilities

The following tables present the offsetting of financial assets and liabilities as of December 31, 2018 and December 31, 2017.

	December 31, 2018
							Gross Amounts Not Offset in Balance Sheet
(Dollars in millions)	Gross Amounts of Recognized Assets/Liabilities		Gross Amounts Offset in Balance Sheet		Net Amounts Presented in Balance Sheet		Financial Instruments		Cash Collateral Received/Pledged		Net Amount
Financial Assets:
Derivative assets	$	871	$	354	$	517	$	14	$	—	$	503
Securities borrowed or purchased under resale agreements	33,974		11,606		22,368		22,291		—		77
Total	$	34,845	$	11,960	$	22,885	$	22,305	$	—	$	580
Financial Liabilities:
Derivative liabilities	$	804	$	322	$	482	$	69	$	—	$	413
Securities loaned or sold under repurchase agreements	38,891		11,606		27,285		26,434		—		851
Total	$	39,695	$	11,928	$	27,767	$	26,503	$	—	$	1,264

	December 31, 2017
							Gross Amounts Not Offset in Balance Sheet
(Dollars in millions)	Gross Amounts of Recognized Assets/Liabilities		Gross Amounts Offset in Balance Sheet		Net Amounts Presented in Balance Sheet		Financial Instruments		Cash Collateral Received/Pledged		Net Amount
Financial Assets:
Derivative assets	$	1,322	$	607	$	715	$	25	$	—	$	690
Securities borrowed or purchased under resale agreements	31,845		10,951		20,894		20,816		—		78
Total	$	33,167	$	11,558	$	21,609	$	20,841	$	—	$	768
Financial Liabilities:
Derivative liabilities	$	1,127	$	620	$	507	$	142	$	—	$	365
Securities loaned or sold under repurchase agreements	37,388		10,951		26,437		25,639		—		798
Total	$	38,515	$	11,571	$	26,944	$	25,781	$	—	$	1,163

Offsetting Assets

The following tables present the offsetting of financial assets and liabilities as of December 31, 2018 and December 31, 2017.

	December 31, 2018
							Gross Amounts Not Offset in Balance Sheet
(Dollars in millions)	Gross Amounts of Recognized Assets/Liabilities		Gross Amounts Offset in Balance Sheet		Net Amounts Presented in Balance Sheet		Financial Instruments		Cash Collateral Received/Pledged		Net Amount
Financial Assets:
Derivative assets	$	871	$	354	$	517	$	14	$	—	$	503
Securities borrowed or purchased under resale agreements	33,974		11,606		22,368		22,291		—		77
Total	$	34,845	$	11,960	$	22,885	$	22,305	$	—	$	580
Financial Liabilities:
Derivative liabilities	$	804	$	322	$	482	$	69	$	—	$	413
Securities loaned or sold under repurchase agreements	38,891		11,606		27,285		26,434		—		851
Total	$	39,695	$	11,928	$	27,767	$	26,503	$	—	$	1,264

	December 31, 2017
							Gross Amounts Not Offset in Balance Sheet
(Dollars in millions)	Gross Amounts of Recognized Assets/Liabilities		Gross Amounts Offset in Balance Sheet		Net Amounts Presented in Balance Sheet		Financial Instruments		Cash Collateral Received/Pledged		Net Amount
Financial Assets:
Derivative assets	$	1,322	$	607	$	715	$	25	$	—	$	690
Securities borrowed or purchased under resale agreements	31,845		10,951		20,894		20,816		—		78
Total	$	33,167	$	11,558	$	21,609	$	20,841	$	—	$	768
Financial Liabilities:
Derivative liabilities	$	1,127	$	620	$	507	$	142	$	—	$	365
Securities loaned or sold under repurchase agreements	37,388		10,951		26,437		25,639		—		798
Total	$	38,515	$	11,571	$	26,944	$	25,781	$	—	$	1,163