Reportable Segments Reportable Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 3,933	$ 3,381	$ 11,162	$ 9,059
Natural Gas Pipelines [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2,399	2,023	6,685	5,088
CO2 [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	508	456	1,445	1,345
Products Pipelines [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	520	474	1,578	1,371
Terminals [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	433	354	1,244	1,034
Kinder Morgan Canada [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	73	74	210	221
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	3,933	3,381	11,165	9,060
Operating Expense [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Increase in earnings from after tax sale of investments	1			(140)
Intersegment Eliminations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	0	0	(3)	(1)
Intersegment Eliminations [Member] | Natural Gas Pipelines [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	0	0	2	0
Intersegment Eliminations [Member] | Terminals [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 0	$ 0	$ 1	$ 1