Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 66	$ 233
Other Comprehensive Income (Loss), Net of Tax, Changes In:
Net unrealized gains (losses) on investments with other-than-temporary impairments	5	(1)
Net unrealized gains (losses) on other investments	234	112
Net unrealized gains (losses) on investments	239	111
Foreign currency translation adjustment	14	(96)
Pension and postretirement benefits	6	6
Other comprehensive income (loss), net of tax	259	21
Total comprehensive income (loss)	$ 325	$ 254