Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2020

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Other comprehensive income (loss) on a pre-tax and after-tax basis

Components of other comprehensive income (loss) on a pre-tax and after-tax basis
	For the years ended December 31,
	2020						2019						2018
($ in millions)	Pre-tax		Tax		After-tax		Pre-tax		Tax		After-tax		Pre-tax		Tax		After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	$	2,512	$	(532)	$	1,980	$	2,807	$	(592)	$	2,215	$	(1,142)	$	241	$	(901)
Less: reclassification adjustment of realized capital gains and losses	870		(183)		687		413		(87)		326		(186)		39		(147)
Unrealized net capital gains and losses	1,642		(349)		1,293		2,394		(505)		1,889		(956)		202		(754)
Unrealized foreign currency translation adjustments	66		(14)		52		(13)		3		(10)		(61)		13		(48)
Unamortized pension and other postretirement prior service credit (1)	12		(3)		9		(59)		12		(47)		(77)		18		(59)
Other comprehensive income (loss)	$	1,720	$	(366)	$	1,354	$	2,322	$	(490)	$	1,832	$	(1,094)	$	233	$	(861)

(1)Represents prior service credits reclassified out of other comprehensive income and amortized into operating costs and expenses.