Consolidated Statements of Income (Unaudited) (Parenthetical) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Net tax effect on income (loss) from discontinued operations	$ (2,000,000)	$ (10,000,000)	$ 3,000,000	$ (24,000,000)
Net securities gains (losses)	(1,000,000)	1,000,000	$ (1,000,000)
Impairment losses related to securities	$ 0	$ 0