Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings, including noncontrolling interests	$ 155	$ 104
Net unrealized gains on securities:
Unrealized holding gains on securities arising during the period	125	125
Reclassification adjustment for realized (gains) losses included in net earnings	0	11
Total net unrealized gains on securities	125	136
Net unrealized gains (losses) on cash flow hedges	(1)	3
Foreign currency translation adjustments	0	6
Pension and other postretirement plans adjustments	0	1
Other comprehensive income, net of tax	124	146
Total comprehensive income, net of tax	279	250
Less: Comprehensive income attributable to noncontrolling interests	2	5
Comprehensive income attributable to shareholders	$ 277	$ 245