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Retirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Schedule of defined benefit plans expense [Table Text Block]
The pre-tax expense for our defined benefit pension and OPEB plans for the periods ended March 31 was as follows (in millions):
 
First Quarter
 
Pension Benefits
 
 
 
 
 
U.S. Plans
 
Non-U.S. Plans
 
Worldwide OPEB
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
Service cost
$
147

 
$
127

 
$
135

 
$
118

 
$
15

 
$
13

Interest cost
454

 
498

 
239

 
300

 
60

 
67

Expected return on assets
(689
)
 
(678
)
 
(349
)
 
(379
)
 
—

 
—

Amortization of:
 

 
 

 
 

 
 

 
 

 
 

Prior service costs/(credits)
39

 
39

 
12

 
14

 
(51
)
 
(57
)
(Gains)/Losses
116

 
51

 
205

 
148

 
36

 
24

Separation programs/other
2

 
—

 
7

 
16

 
(1
)
 
1

Recognition of (gains)/losses due to:
 
 
 
 
 
 
 
 
 
 
 
Curtailments
—

 
—

 
—

 
—

 
—

 
—

Settlements
—

 
—

 
—

 
14

 
—

 
—

  Total expense/(income)
$
69

 
$
37

 
$
249

 
$
231

 
$
59

 
$
48