Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2013

Supplemental Cash Flow Information

Schedule of supplemental cash flow information from collateralized securities received

($ in millions)		2013			2012
Net change in proceeds managed
Net change in short-term investments	$	(64	)	$	(173	)
Operating cash flow used	$	(64	)	$	(173	)
Net change in liabilities
Liabilities for collateral, beginning of year	$	(561	)	$	(263	)
Liabilities for collateral, end of period		(625	)		(436	)
Operating cash flow provided	$	64		$	173