Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Assets
Fixed maturities available for sale, at fair value (amortized cost - $43,758 and $40,450) (includes hybrid financial instruments of $410 and $357)	$ 46,504		$ 41,967
Fixed maturities held to maturity, at amortized cost (fair value - $7,879 and $8,605)	7,493		8,447
Equity securities, at fair value (cost - $741 and $671)	770		647
Short-term investments, at fair value and amortized cost	2,429		2,301
Other investments (cost - $2,385 and $2,112)	2,621		2,314
Total investments	59,817		55,676
Cash	690	[1]	614
Securities lending collateral	2,039		1,375
Accrued investment income	564		547
Insurance and reinsurance balances receivable	5,288		4,387
Reinsurance recoverable on losses and loss expenses	11,857		12,389
Reinsurance recoverable on policy benefits	246		249
Deferred policy acquisition costs	1,793		1,548
Value of business acquired	632		676
Goodwill and other intangible assets	4,990		4,799
Prepaid reinsurance premiums	1,613		1,541
Deferred tax assets	344		673
Investments in partially-owned insurance companies (cost - $352 and $345)	354		352
Other assets	3,281		2,495
Total assets	93,508		87,321
Liabilities
Unpaid losses and loss expenses	38,200		37,477
Unearned premiums	7,068		6,334
Future policy benefits	4,414		4,274
Insurance and reinsurance balances payable	3,448		3,542
Deposit liabilities	804		663
Securities lending payable	2,044		1,385
Payable for securities purchased	733		287
Accounts payable, accrued expenses, and other liabilities	4,542		3,948
Income taxes payable	221		159
Short-term debt	1,402		1,251
Long-term debt	3,360		3,360
Trust preferred securities	309		309
Total liabilities	66,545		62,989
Commitments and contingencies
Shareholders' equity
Common Shares (CHF 29.34 and CHF 30.27 par value; 342,832,412 shares issued; 339,735,109 and 336,927,276 shares outstanding)	9,759		10,095
Common Shares in treasury (3,097,303 and 5,905,136 shares)	(187)		(327)
Additional paid-in capital	5,109		5,326
Retained earnings	9,268		7,327
Accumulated other comprehensive income (AOCI)	3,014		1,911
Total shareholders' equity	26,963		24,332
Total liabilities and shareholders' equity	$ 93,508		$ 87,321

[1] ACE maintains two notional multicurrency cash pools (Pools) with a third-party bank. Various ACE entities participate in one or the other of the Pools, pursuant to which credit and debit balances in individual ACE accounts are translated daily into a single currency and pooled on a notional basis. Individual ACE entities are permitted to overdraw on their individual accounts provided the overall Pool balances do not fall below zero. At September 30, 2012, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.