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Representation and Warranty Reserve (Tables)
 9 Months Ended
Sep. 30, 2016
Representation and Warranty Reserve Disclosures [Abstract]  
Schedule of Representation and Warranty Reserve Activity
The following table shows the activity impacting the representation and warranty reserve:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2016
2015
 
2016
2015
 
(Dollars in millions)
 Balance, beginning of period
$
36

$
48

 
$
40

$
53

 Provision (benefit)
 
 
 
 
 
 
Gain on sale reduction for representation and warranty liability
1

2

 
4

6

 
Representation and warranty provision (benefit)
(6
)
(6
)
 
(12
)
(13
)
 
Total
(5
)
(4
)
 
(8
)
(7
)
 Charge-offs, net
1

1

 
—

(1
)
 Balance, end of period
$
32

$
45

 
$
32

$
45