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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS
6 Months Ended
Jun. 30, 2012
Compensation and Retirement Disclosure [Abstract]  
PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS
PENSION AND OTHER POSTRETIREMENT BENEFITS

Net Periodic Benefit Cost for All Significant Plans
Three Months Ended
 
Six Months Ended
In millions
Jun 30,
2012

 
Jun 30,
2011

 
Jun 30,
2012

 
Jun 30,
2011

Defined Benefit Pension Plans:
 
 
 
 
 
 
 
Service cost
$
7

 
$
6

 
$
14

 
$
12

Interest cost
47

 
50

 
94

 
100

Expected return on plan assets
(59
)
 
(63
)
 
(118
)
 
(126
)
Amortization of prior service cost
2

 
2

 
4

 
4

Amortization of net loss
15

 
21

 
30

 
42

Net periodic benefit cost
$
12

 
$
16

 
$
24

 
$
32

 
Other Postretirement Benefits:
 
 
 
 
 
 
 
Interest cost
$
4

 
$
5

 
$
8

 
$
10

Net periodic benefit cost
$
4

 
$
5

 
$
8

 
$
10