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Goodwill Goodwill (Tables)
 12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill [Table Text Block]
Changes in the amounts of our goodwill for each of the years ended December 31, 2017 and 2016 are summarized by reporting unit as follows (in millions):  
 
Natural Gas Pipelines Regulated
 
Natural Gas Pipelines Non-Regulated
 
CO2
 
Products Pipelines
 
Products Pipelines Terminals
 
Terminals
 
Kinder
Morgan
Canada
 
Total
Historical Goodwill
$
17,527

 
$
5,812

 
$
1,528

 
$
2,125

 
$
221

 
$
1,584

 
$
556

 
$
29,353

Accumulated impairment losses
(1,643
)
 
(1,597
)
 
—

 
(1,197
)
 
(70
)
 
(679
)
 
(377
)
 
(5,563
)
December 31, 2015
15,884

 
4,215

 
1,528

 
928

 
151

 
905

 
179

 
23,790

Currency translation
—

 
—

 
—

 
—

 
—

 
—

 
6

 
6

Divestitures(a)
(1,635
)
 
—

 
—

 
—

 
—

 
(9
)
 
—

 
(1,644
)
December 31, 2016
14,249

 
4,215

 
1,528

 
928

 
151

 
896

 
185

 
22,152

Currency translation
—

 
—

 
—

 
—

 
—

 
—

 
13

 
13

Divestitures(b)
—

 
—

 
—

 
—

 
—

 
(3
)
 
—

 
(3
)
December 31, 2017
$
14,249

 
$
4,215

 
$
1,528

 
$
928

 
$
151

 
$
893

 
$
198

 
$
22,162

_______
(a)
2016 includes $1,635 million related to the sale of a 50% interest in our SNG natural gas pipeline system by Natural Gas Pipelines Regulated to Southern Company and $9 million related to certain terminal divestitures.
(b)
2017 includes $3 million related to certain terminal divestitures.