Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Revenues
Net earned premiums	$ 6,924		$ 6,921		$ 7,212
Net Investment Income	1,988		1,840		2,067
Net realized investment gains (losses):
Other-than-temporary impairment losses	(81)		(156)		(77)
Other net realized investment gains (loss)	131		89		134
Net realized investment gains (losses)	50		(67)		57
Other revenues	404		407		356
Total revenues	9,366		9,101		9,692
Claims, Benefits and Expenses
Insurance claims and policyholders' benefits	5,283		5,384		5,591
Amortization of deferred acquisition costs	1,235		1,540		1,317
Other operating expenses	1,552		1,473		1,394
Interest	159		155		183
Total claims, benefits and expenses	8,229		8,552		8,485
Income (loss) from continuing operations before income tax	1,137		549		1,207
Income tax expense (benefit)	(278)		(70)		(319)
Net income (loss) from continuing operations	859		479		888
(Loss) income from discontinued operations, net of income tax benefit (expense)	0		0		(197)
Net income (loss)	$ 859	[1]	$ 479	[1],[2]	$ 691
Basic Earnings (Loss) Per Share Attributable to CNA
Income (loss) from continuing operations	$ 3.18		$ 1.77		$ 3.29
(Loss) income from discontinued operations	0.00		0.00		(0.73)
Basic earnings (loss) per share	3.18		1.77		2.56
Diluted Earnings (Loss) Per Share Attributable to CNA
Income (loss) from continuing operations	3.17		1.77		3.28
(Loss) income from discontinued operations	0.00		0.00		(0.73)
Diluted earnings (loss) per share	3.17		1.77		2.55
Dividends per share	$ 3.00		$ 3.00		$ 2.00
Weighted Average Outstanding Common Stock and Common Stock Equivalents
Basic	270.4		270.2		269.9
Diluted	271.1		270.7		270.6

[1] Net income (loss) in the first quarter of 2016 and the second quarter of 2015 included a charge related to the application of retroactive reinsurance accounting to adverse reserve development ceded under the 2010 A&EP Loss Portfolio Transfer in our Corporate & Other Non-Core segment.

[2] Net income (loss) in the fourth quarter of 2015 included a charge related to recognition of a premium deficiency in our long term care business.