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Changes in Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2017
Changes in Accumulated Other Comprehensive Loss [Abstract]  
Schedule of changes in accumulated other comprehensive income [Table Text Block]
  
Post-Employment Benefits, Net of Tax
 
Hedge Instruments, Net of Tax
 
Translation Adjustments and Other, Net of Tax
 
Total
 
(in millions)
Balance, December 31, 2016
$
(614
)
 
$
(22
)
 
$
(948
)
 
$
(1,584
)
Other comprehensive income before reclassifications, net of tax
30

 
2

 
124

 
156

Reclassifications from accumulated other comprehensive income (loss) to earnings
20

 
(3
)
 
—

 
17

Other comprehensive income (loss), net of tax
50

 
(1
)
 
124

 
173

Balance, December 31, 2017
$
(564
)
 
$
(23
)
 
$
(824
)
 
$
(1,411
)