Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets
Fixed maturity securities at fair value (amortized cost of $37,885 and $37,345)	$ 41,367	$ 39,937
Equity securities at fair value (cost of $252 and $288)	290	304
Limited partnership investments	2,242	2,245
Other invested assets	11	12
Mortgage loans	339	234
Short term investments	1,752	1,641
Total investments	46,001	44,373
Cash	100	75
Reinsurance receivables (less allowance for uncollectible receivables of $71 and $91)	5,751	6,001
Insurance receivables (less allowance for uncollectible receivables of $110 and $112)	1,794	1,614
Accrued investment income	446	436
Deferred acquisition costs	584	552
Deferred income taxes	127	415
Property and equipment at cost (less accumulated depreciation of $428 and $420)	310	309
Goodwill and other intangible assets	139	139
Other assets (includes $0 and $130 due from Loews Corporation)	877	779
Separate account business	370	417
Total assets	56,499	55,110
Liabilities and Equity
Claim and claim adjustment expenses	24,007	24,303
Unearned premiums	3,478	3,250
Future policy benefits	10,352	9,810
Policyholders’ funds	167	191
Participating policyholders’ funds	71	68
Short term debt	83	83
Long term debt	2,526	2,525
Other liabilities (includes $18 and $0 due to Loews Corporation)	3,231	2,975
Separate account business	370	417
Total liabilities	44,285	43,622
Commitments and contingencies (Notes C, G and I)
Equity:
Common stock ($2.50 par value; 500,000,000 shares authorized; 273,040,243 shares issued; 269,397,139 and 269,274,900 shares outstanding)	683	683
Additional paid-in capital	2,141	2,141
Retained earnings	8,643	8,308
Accumulated other comprehensive income (loss)	867	480
Treasury stock (3,643,104 and 3,765,343 shares), at cost	(99)	(102)
Notes receivable for the issuance of common stock	(21)	(22)
Total CNA stockholders’ equity	12,214	11,488
Total liabilities and equity	$ 56,499	$ 55,110