Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net earnings, including noncontrolling interests	$ 113	$ 66	$ 280	$ 240
Net unrealized gains (losses) on securities:
Unrealized holding gains (losses) on securities arising during the period	89	(110)	427	(255)
Reclassification adjustment for realized (gains) losses included in net earnings	(1)	10	20	(3)
Total net unrealized gains (losses) on securities	88	(100)	447	(258)
Net unrealized gains on cash flow hedges	0	2	4	2
Foreign currency translation adjustments	(3)	(7)	4	(15)
Pension and other postretirement plans adjustments	0	1	1	1
Other comprehensive income (loss), net of tax	85	(104)	456	(270)
Total comprehensive income (loss), net of tax	198	(38)	736	(30)
Less: Comprehensive income attributable to noncontrolling interests	5	1	23	13
Comprehensive income (loss) attributable to shareholders	$ 193	$ (39)	$ 713	$ (43)