CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets
Accounts receivable, related party	$ 15	$ 12
Other current assets	1	0
Total current assets	16	12
Investment in Kinder Morgan Energy Partners, L.P.	3,550	3,454
Deferred income taxes	0	10
Total Assets	3,566	3,476
Current liabilities
Accounts payable	3	4
Accrued other current liabilities	13	8
Total current liabilities	16	12
Deferred income taxes	1	0
Retained deficit	(1,834)	(1,755)
Accumulated other comprehensive income	8	18
Total Shareholders' Equity	3,549	3,464
Total Liabilities and Shareholders' Equity	3,566	3,476
Voting Shares [Member]
Current liabilities
Common shares	0	0
Listed Shares [Member]
Current liabilities
Common shares	$ 5,375	$ 5,201