AOCI (Tables)

12 Months Ended

Dec. 31, 2016

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Changes in AOCI

Year Ended December 31, 2016	Unrecognized Net Pension and Postretirement Costs			Unrealized Net Gains (Losses) on Cash Flow Hedges			Unrealized Net Gains (Losses) on AFS Securities			FDIC's Share of Unrealized (Gains) Losses on AFS Securities			Other, net			Total
	(Dollars in millions)
AOCI balance, January 1, 2016	$	(723	)	$	(83	)	$	(34	)	$	(169	)	$	(19	)	$	(1,028	)
OCI before reclassifications, net of tax	(91		)	(16		)	(201		)	148			1			(159		)
Amounts reclassified from AOCI:
Personnel expense	80			—			—			—			—			80
Interest income	—			—			7			—			1			8
Interest expense	—			11			—			—			—			11
FDIC loss share income, net	—			—			—			33			—			33
Securities (gains) losses, net	—			—			(46		)	—			—			(46		)
Total before income taxes	80			11			(39		)	33			1			86
Less: Income taxes	30			4			(15		)	12			—			31
Net of income taxes	50			7			(24		)	21			1			55
Net change in AOCI	(41		)	(9		)	(225		)	169			2			(104		)
AOCI balance, December 31, 2016	$	(764	)	$	(92	)	$	(259	)	$	—		$	(17	)	$	(1,132	)

Year Ended December 31, 2015	Unrecognized Net Pension and Postretirement Costs			Unrealized Net Gains (Losses) on Cash Flow Hedges			Unrealized Net Gains (Losses) on AFS Securities			FDIC's Share of Unrealized (Gains) Losses on AFS Securities			Other, net			Total
	(Dollars in millions)
AOCI balance, January 1, 2015	$	(626	)	$	(54	)	$	152		$	(207	)	$	(16	)	$	(751	)
OCI before reclassifications, net of tax	(139		)	(81		)	(206		)	19			(9		)	(416		)
Amounts reclassified from AOCI:
Personnel expense	67			—			—			—			—			67
Interest income	—			—			29			—			9			38
Interest expense	—			83			—			—			—			83
FDIC loss share income, net	—			—			—			31			—			31
Securities (gains) losses, net	—			—			3			—			—			3
Total before income taxes	67			83			32			31			9			222
Less: Income taxes	25			31			12			12			3			83
Net of income taxes	42			52			20			19			6			139
Net change in AOCI	(97		)	(29		)	(186		)	38			(3		)	(277		)
AOCI balance, December 31, 2015	$	(723	)	$	(83	)	$	(34	)	$	(169	)	$	(19	)	$	(1,028	)

Year Ended December 31, 2014	Unrecognized Net Pension and Postretirement Costs			Unrealized Net Gains (Losses) on Cash Flow Hedges			Unrealized Net Gains (Losses) on AFS Securities			FDIC's Share of Unrealized (Gains) Losses on AFS Securities			Other, net			Total
	(Dollars in millions)
AOCI balance, January 1, 2014	$	(303	)	$	2		$	(42	)	$	(235	)	$	(15	)	$	(593	)
OCI before reclassifications, net of tax	(334		)	(107		)	207			—			(5		)	(239		)
Amounts reclassified from AOCI:
Personnel expense	17			—			—			—			—			17
Interest income	—			—			(24		)	—			6			(18		)
Interest expense	—			82			—			—			—			82
FDIC loss share income, net	—			—			—			45			—			45
Securities (gains) losses, net	—			—			3			—			—			3
Total before income taxes	17			82			(21		)	45			6			129
Less: Income taxes	6			31			(8		)	17			2			48
Net of income taxes	11			51			(13		)	28			4			81
Net change in AOCI	(323		)	(56		)	194			28			(1		)	(158		)
AOCI balance, December 31, 2014	$	(626	)	$	(54	)	$	152		$	(207	)	$	(16	)	$	(751	)