Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets
Fixed maturity securities at fair value (amortized cost of $38,170 and $37,345)	$ 42,633	$ 39,937
Equity securities at fair value (cost of $228 and $288)	249	304
Limited partnership investments	2,462	2,245
Other invested assets	59	12
Mortgage loans	401	234
Short term investments	1,832	1,641
Total investments	47,636	44,373
Cash	156	75
Reinsurance receivables (less allowance for uncollectible receivables of $73 and $91)	6,158	6,001
Insurance receivables (less allowance for uncollectible receivables of $101 and $112)	1,882	1,614
Accrued investment income	434	436
Deferred acquisition costs	598	552
Deferred income taxes	93	415
Property and equipment at cost (less accumulated depreciation of $404 and $420)	326	309
Goodwill	154	123
Other assets (includes $4 and $130 due from Loews Corporation)	773	795
Separate account business	312	417
Total assets	58,522	55,110
Liabilities and Equity
Claim and claim adjustment expenses	24,763	24,303
Unearned premiums	3,610	3,250
Future policy benefits	11,475	9,810
Policyholders’ funds	157	191
Participating policyholders’ funds	76	68
Short term debt	13	83
Long term debt	2,557	2,525
Other liabilities	3,245	2,975
Separate account business	312	417
Total liabilities	46,208	43,622
Commitments and contingencies (Notes C, H and L)
Equity:
Common stock ($2.50 par value; 500,000,000 shares authorized; 273,040,243 shares issued; 269,399,390 and 269,274,900 shares outstanding)	683	683
Additional paid-in capital	2,146	2,141
Retained earnings	8,774	8,308
Accumulated other comprehensive income (loss)	831	480
Treasury stock (3,640,853 and 3,765,343 shares), at cost	(99)	(102)
Notes receivable for the issuance of common stock	(21)	(22)
Total CNA stockholders’ equity	12,314	11,488
Total liabilities and equity	$ 58,522	$ 55,110