Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings, including noncontrolling interests	$ 104	$ 25
Net unrealized gains on securities:
Unrealized holding gains on securities arising during the period	125	69
Reclassification adjustment for realized (gains) losses included in net earnings	11	(12)
Total net unrealized gains on securities	136	57
Net unrealized gains on cash flow hedges	3	1
Foreign currency translation adjustments	6	(8)
Pension and other postretirement plans adjustments	1	0
Other comprehensive income, net of tax	146	50
Total comprehensive income, net of tax	250	75
Less: Comprehensive income attributable to noncontrolling interests	5	7
Comprehensive income attributable to shareholders	$ 245	$ 68