Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net earnings, including noncontrolling interests	$ 63	$ 149	$ 167	$ 174
Net unrealized gains (losses) on securities:
Unrealized holding gains (losses) on securities arising during the period	213	(214)	338	(145)
Reclassification adjustment for realized (gains) losses included in net earnings	10	(1)	21	(13)
Total net unrealized gains (losses) on securities	223	(215)	359	(158)
Net unrealized gains (losses) on cash flow hedges	1	(1)	4	0
Foreign currency translation adjustments	1	0	7	(8)
Pension and other postretirement plans adjustments	0	0	1	0
Other comprehensive income (loss), net of tax	225	(216)	371	(166)
Total comprehensive income (loss), net of tax	288	(67)	538	8
Less: Comprehensive income attributable to noncontrolling interests	13	5	18	12
Comprehensive income (loss) attributable to shareholders	$ 275	$ (72)	$ 520	$ (4)