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Supplemental Cash Flow Information (Tables)
 6 Months Ended
Jun. 30, 2012
Supplemental Cash Flow Information  
Schedule of supplemental cash flow information from collateralized securities received

 

($ in millions)

 

Six months ended June 30,

 

 

2012

 

 

2011

Net change in proceeds managed

 

 

 

 

 

 

 

Net change in short-term investments

$

(202

)

 

$

(421

)

Operating cash flow used

 

(202

)

 

 

(421

)

Net change in cash

 

(1

)

 

 

(2

)

Net change in proceeds managed

$

(203

)

 

$

(423

)

 

 

 

 

 

 

 

 

Net change in liabilities

 

 

 

 

 

 

 

Liabilities for collateral, beginning of year

$

(462

)

 

$

(484

)

Liabilities for collateral, end of period

 

(665

)

 

 

(907

)

Operating cash flow provided

$

203

 

 

$

423