Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues
Net earned premiums	$ 1,751	$ 1,810	$ 5,173	$ 5,427
Net investment income	354	480	1,412	1,556
Net realized investment gains (losses):
Other-than-temporary impairment losses	(56)	(10)	(99)	(17)
Portion of other-than-temporary impairments recognized in Other comprehensive income	0	0	0	0
Net other-than-temporary impairment losses recognized in earnings	(56)	(10)	(99)	(17)
Other net realized investment gains (loss)	7	47	60	86
Net realized investment gains (losses)	(49)	37	(39)	69
Other revenues	97	84	286	262
Total revenues	2,153	2,411	6,832	7,314
Claims, Benefits and Expenses
Insurance claims and policyholders' benefits	1,200	1,354	4,008	4,241
Amortization of deferred acquisition costs	319	332	936	996
Other operating expenses	362	384	1,061	984
Interest	39	48	117	138
Total claims, benefits and expenses	1,920	2,118	6,122	6,359
Income (loss) from continuing operations before income tax	233	293	710	955
Income tax (expense) benefit	(55)	(84)	(161)	(265)
Net income (loss) from continuing operations	178	209	549	690
(Loss) income from discontinued operations, net of income tax benefit (expense)	0	4	0	(197)
Net income (loss)	$ 178	$ 213	$ 549	$ 493
Basic Earnings (Loss) Per Share Attributable to CNA
Income from continuing operations	$ 0.66	$ 0.77	$ 2.03	$ 2.56
(Loss) income from discontinued operations	0.00	0.02	0.00	(0.73)
Basic earnings per share	0.66	0.79	2.03	1.83
Diluted Earnings (Loss) Per Share Attributable to CNA
Income (loss) from continuing operations	0.66	0.77	2.03	2.55
(Loss) income from discontinued operations	0.00	0.02	0.00	(0.73)
Diluted earnings (loss) per share	0.66	0.79	2.03	1.82
Common Stock, Dividends, Per Share, Declared	$ 0.25	$ 0.25	$ 2.75	$ 1.75
Weighted Average Outstanding Common Stock and Common Stock Equivalents
Basic	270.3	269.9	270.2	269.9
Diluted	270.8	270.6	270.7	270.6