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Derivative Financial Instruments (Tables)
 9 Months Ended
Sep. 30, 2012
Summary of Derivative Instruments [Abstract]  
Summary of recognized gains (losses) related to derivative financial instruments
Recognized Gains (Losses)
Periods ended September 30
Three Months
 
Nine Months
(In millions)
2012
 
2011
 
2012
 
2011
Without hedge designation
 
 
 
 
 
 
 
Currency forwards
$
(1
)
 
$
—

 
$
(1
)
 
$
(1
)
Forward commitments for mortgage-backed securities
—

 
1

 
—

 
1

Total without hedge designation
(1
)
 
1

 
(1
)
 
—

Trading activities
 
 
 
 
 
 
 
Futures sold, not yet purchased
(1
)
 
—

 
—

 
—

Total
$
(2
)
 
$
1

 
$
(1
)
 
$
—
Summary of aggregate contractual or notional amounts and gross estimated fair values related to derivative financial instruments
Derivative Financial Instruments
September 30, 2012
Contractual/
Notional
Amount
 
Estimated Fair Value
(In millions)
 
Asset
 
(Liability)
Without hedge designation
 
 
 
 
 
Credit default swaps - purchased protection
$
20

 
$
—

 
$
(1
)
Currency forwards
72

 
—

 
(2
)
Equity warrants
5

 
—

 
—

Total
$
97

 
$
—

 
$
(3
)

December 31, 2011
Contractual/
Notional
Amount
 
Estimated Fair Value
(In millions)
 
Asset
 
(Liability)
Without hedge designation
 
 
 
 
 
Credit default swaps - purchased protection
$
20

 
$
—

 
$
(1
)
Currency forwards
22

 
1

 
—

Equity warrants
4

 
—

 
—

Total
$
46

 
$
1

 
$
(1
)