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Debt and Interest Expense (Tables)
 9 Months Ended
Sep. 30, 2013
Table Text Block [Abstract]  
Debt Outstanding and Debt Activity Tables
The following summarizes the Company’s outstanding debt:
 
September 30,
 
December 31,
millions
2013
 
2012
Total debt at face value
$
15,302

 
$
14,952

Net unamortized discounts and premiums (1)
(1,655
)
 
(1,683
)
Total long-term debt
$
13,647

 
$
13,269

__________________________________________________________________
(1)
Unamortized discounts and premiums are amortized over the term of the related debt.

The following summarizes the Company’s debt activity during the nine months ended September 30, 2013:
 
Carrying
 
 
 
 
millions
Value
 
Description
Balance at December 31, 2012
$
13,269

 
 
 
 
Borrowings
385

 
WES revolving credit facility
Other, net
9

 
Amortization of debt discounts and premiums
Balance at March 31, 2013
$
13,663

 
 
 
 
Borrowings
110

 
WES revolving credit facility
Repayments
(245
)
 
WES revolving credit facility
Other, net
10

 
Amortization of debt discounts and premiums
Balance at June 30, 2013
$
13,538

 
 
 
 
Issuance
250

 
WES 2.600% Senior Notes due 2018
Borrowings
100

 
WES revolving credit facility
Repayments
(250
)
 
WES revolving credit facility
Other, net
9

 
Amortization of debt discounts and premiums
Balance at September 30, 2013
$
13,647

 
 
 
 
Interest Expense Table
The following summarizes interest expense:
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
millions
2013
 
2012
 
2013
 
2012
Current debt, long-term debt, and other
$
240

 
$
238

 
$
710

 
$
724

Capitalized interest
(63
)
 
(53
)
 
(197
)
 
(163
)
Interest expense
$
177

 
$
185

 
$
513

 
$
561