Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2012

Supplemental Cash Flow Information

Schedule of supplemental cash flow information from collateralized securities received

($ in millions)	2012			2011			2010
Net change in proceeds managed
Net change in short-term investments	$	(341	)	$	21		$	171
Operating cash flow (used) provided		(341	)		21			171
Net change in cash		(5	)		1			3
Net change in proceeds managed	$	(346	)	$	22		$	174
Net change in liabilities
Liabilities for collateral, beginning of year	$	(462	)	$	(484	)	$	(658	)
Liabilities for collateral, end of year		(808	)		(462	)		(484	)
Operating cash flow provided (used)	$	346		$	(22	)	$	(174	)