CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current Assets
Accounts receivable, related party	$ 14	$ 12
Other current assets	1	0
Total current assets	15	12
Assets, Noncurrent [Abstract]
Investment in Kinder Morgan Energy Partners, L.P.	3,781	3,454
Deferred income taxes	0	10
Total Assets	3,796	3,476
Current liabilities
Accounts payable	4	4
Accrued other current liabilities	11	8
Total current liabilities	15	12
Liabilities, Noncurrent [Abstract]
Deferred income taxes	22	0
Equity [Abstract]
Retained deficit	(1,910)	(1,755)
Accumulated other comprehensive income	7	18
Total Shareholders' Equity	3,759	3,464
Total Liabilities and Shareholders' Equity	3,796	3,476
Voting Shares [Member]
Equity [Abstract]
Common shares	0	0
Listed Shares [Member]
Equity [Abstract]
Common shares	$ 5,662	$ 5,201