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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS
 6 Months Ended
Jun. 30, 2014
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,
2014

 
Jun 30,
2013

 
Jun 30,
2014

 
Jun 30,
2013

Defined Benefit Pension Plans:
 
 
 
 
 
 
 
Service cost
$
8

 
$
8

 
$
16

 
$
16

Interest cost
46

 
41

 
92

 
82

Expected return on plan assets
(58
)
 
(58
)
 
(116
)
 
(116
)
Amortization of prior service cost
1

 
2

 
2

 
4

Amortization of net loss
17

 
22

 
34

 
44

Net periodic benefit cost
$
14

 
$
15

 
$
28

 
$
30

 
 
 
 
 
 
 
 
Other Postretirement Benefits:
 
 
 
 
 
 
 
Interest cost
$
3

 
$
4

 
$
6

 
$
8

Amortization of net gain
(2
)
 
—

 
(4
)
 
—

Net periodic benefit cost
$
1

 
$
4

 
$
2

 
$
8