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Pension Plans (Tables)
 6 Months Ended
Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Net Periodic Benefit Cost Table
Total pension cost for the periods indicated included the following components:
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
 
2014
 
2013
 
2014
 
2013
 
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
U.S.
 
Foreign
 
 
(in millions)
Service cost
 
$
4

 
$
4

 
$
4

 
$
6

 
$
7

 
$
8

 
$
8

 
$
13

Interest cost
 
12

 
129

 
11

 
134

 
24

 
251

 
22

 
273

Expected return on plan assets
 
(16
)
 
(96
)
 
(16
)
 
(127
)
 
(32
)
 
(186
)
 
(31
)
 
(257
)
Amortization of prior service cost
 
1

 
1

 
2

 
—

 
3

 
2

 
3

 
—

Amortization of net loss
 
3

 
9

 
7

 
22

 
6

 
17

 
14

 
42

Total pension cost
 
$
4

 
$
47

 
$
8

 
$
35

 
$
8

 
$
92

 
$
16

 
$
71