XML 79 R40.htm IDEA: XBRL DOCUMENT v2.4.0.8
Other Investments (Tables)
 12 Months Ended
Dec. 31, 2013
Regulated Entity, Other Assets, Noncurrent [Abstract]  
Amortized Cost and Fair Value of the Trust Investments
The following table sets forth amortized cost and fair value of the trust investments:
 
Longest
Maturity Date
 
Amortized Cost
 
Fair Value
 
 
December 31,
(in millions)
 
 
2013
 
2012
 
2013
 
2012
Stocks
—
 
$
656

 
$
978

 
$
2,208

 
$
2,271

Municipal bonds
2051
 
675

 
518

 
756

 
644

U.S. government and agency securities
2044
 
902

 
547

 
947

 
603

Corporate bonds
2054
 
208

 
324

 
241

 
410

Short-term investments and receivables/payables
One-year
 
329

 
116

 
342

 
120

Total
 
 
$
2,770

 
$
2,483

 
$
4,494

 
$
4,048
Summary of Changes in the Fair Value of Trust
The following table sets forth a summary of changes in the fair value of the trusts:
 
Years ended December 31,
(in millions)
2013
 
2012
 
2011
Balance at beginning of period
$
4,048

 
$
3,592

 
$
3,480

Gross realized gains
300

 
73

 
108

Gross realized losses
(32
)
 
(5
)
 
(17
)
Unrealized gains (losses), net
160

 
276

 
(7
)
Other-than-temporary impairments
(47
)
 
(36
)
 
(47
)
Interest, dividends, contributions and other
65

 
148

 
75

Balance at end of period
$
4,494

 
$
4,048

 
$
3,592