Other Comprehensive Income

9 Months Ended

Sep. 30, 2018

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

Other Comprehensive Income

Note 15 Other Comprehensive Income

Components of other comprehensive income (loss) on a pre-tax and after-tax basis
($ in millions)	Three months ended September 30,
	2018									2017
	Pre-tax			Tax			After-tax			Pre-tax			Tax			After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	$	(116	)	$	25		$	(91	)	$	300		$	(105	)	$	195
Less: reclassification adjustment of realized capital gains and losses	(26		)	5			(21		)	107			(37		)	70
Unrealized net capital gains and losses	(90		)	20			(70		)	193			(68		)	125
Unrealized foreign currency translation adjustments	(18		)	4			(14		)	43			(15		)	28
Unrecognized pension and other postretirement benefit cost arising during the period	—			—			—			(5		)	3			(2		)
Less: reclassification adjustment of net periodic cost recognized in operating costs and expenses	(86		)	18			(68		)	(116		)	41			(75		)
Unrecognized pension and other postretirement benefit cost	86			(18		)	68			111			(38		)	73
Other comprehensive (loss) income	$	(22	)	$	6		$	(16	)	$	347		$	(121	)	$	226
	Nine months ended September 30,
	2018									2017
	Pre-tax			Tax			After-tax			Pre-tax			Tax			After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	$	(1,103	)	$	233		$	(870	)	$	1,165		$	(408	)	$	757
Less: reclassification adjustment of realized capital gains and losses	(129		)	27			(102		)	245			(86		)	159
Unrealized net capital gains and losses	(974		)	206			(768		)	920			(322		)	598
Unrealized foreign currency translation adjustments	(32		)	7			(25		)	55			(19		)	36
Unrecognized pension and other postretirement benefit cost arising during the period	4			(1		)	3			(8		)	5			(3		)
Less: reclassification adjustment of net periodic cost recognized in operating costs and expenses	(139		)	29			(110		)	(174		)	61			(113		)
Unrecognized pension and other postretirement benefit cost	143			(30		)	113			166			(56		)	110
Other comprehensive (loss) income	$	(863	)	$	183		$	(680	)	$	1,141		$	(397	)	$	744