AOCI

12 Months Ended

Dec. 31, 2021

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

AOCI

AOCIAOCI includes the after-tax change in unrecognized net costs related to defined benefit pension and OPEB plans as well as unrealized gains and losses on cash flow hedges and AFS securities.

(Dollars in millions)	Pension and OPEB Costs		Cash Flow Hedges		AFS Securities		Other, net		Total
AOCI balance, January 1, 2019	$	(1,164)	$	(31)	$	(500)	$	(20)	$	(1,715)
OCI before reclassifications, net of tax	(42)		(89)		790		18		677
Amounts reclassified from AOCI:
Before tax	111		25		119		1		256
Tax effect	27		6		29		—		62
Amounts reclassified, net of tax	84		19		90		1		194
Total OCI, net of tax	42		(70)		880		19		871
AOCI balance, December 31, 2019	(1,122)		(101)		380		(1)		(844)
OCI before reclassifications, net of tax	190		1		1,298		2		1,491
Amounts reclassified from AOCI:
Before tax	75		48		(32)		—		91
Tax effect	18		12		(8)		—		22
Amounts reclassified, net of tax	57		36		(24)		—		69
Total OCI, net of tax	247		37		1,274		2		1,560
AOCI balance, December 31, 2020	(875)		(64)		1,654		1		716
OCI before reclassifications, net of tax	767		—		(3,459)		—		(2,692)
Amounts reclassified from AOCI:
Before tax	29		72		384		—		485
Tax effect	7		17		89		—		113
Amounts reclassified, net of tax	22		55		295		—		372
Total OCI, net of tax	789		55		(3,164)		—		(2,320)
AOCI balance, December 31, 2021	$	(86)	$	(9)	$	(1,510)	$	1	$	(1,604)
Primary income statement location of amounts reclassified from AOCI	Other expense		Net interest income and Other expense		Securities gains (losses) and Net interest income		Net interest income