Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets
Fixed maturity securities at fair value (amortized cost of $37,810 and $37,345)	$ 40,837	$ 39,937
Equity securities at fair value (cost of $278 and $288)	298	304
Limited partnership investments	2,400	2,245
Other invested assets	11	12
Mortgage loans	281	234
Short term investments	1,638	1,641
Total investments	45,465	44,373
Cash	59	75
Reinsurance receivables (less allowance for uncollectible receivables of $91 and $91)	5,898	6,001
Insurance receivables (less allowance for uncollectible receivables of $113 and $112)	1,664	1,614
Accrued investment income	478	436
Deferred acquisition costs	576	552
Deferred income taxes	201	415
Property and equipment at cost (less accumulated depreciation of $425 and $420)	307	309
Goodwill and other intangible assets	139	139
Other assets (includes $12 and $130 due from Loews Corporation)	818	779
Separate account business	402	417
Total assets	56,007	55,110
Liabilities and Equity
Claim and claim adjustment expenses	24,203	24,303
Unearned premiums	3,383	3,250
Future policy benefits	9,959	9,810
Policyholders’ funds	169	191
Participating policyholders’ funds	68	68
Short term debt	83	83
Long term debt	2,526	2,525
Other liabilities	3,233	2,975
Separate account business	402	417
Total liabilities	44,026	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; 269,356,268 and 269,274,900 shares outstanding)	683	683
Additional paid-in capital	2,140	2,141
Retained earnings	8,517	8,308
Accumulated other comprehensive income (loss)	764	480
Treasury stock (3,683,975 and 3,765,343 shares), at cost	(100)	(102)
Notes receivable for the issuance of common stock	(23)	(22)
Total CNA stockholders’ equity	11,981	11,488
Total liabilities and equity	$ 56,007	$ 55,110