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Stockholders' Equity Common Equity (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
0 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 0 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mar. 04, 2014
|
Oct. 17, 2013
|
Mar. 31, 2014
|
Mar. 31, 2013
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Mar. 31, 2014
Class P [Member]
|
Mar. 31, 2013
Class P [Member]
|
Dec. 31, 2013
Class P [Member]
|
Dec. 31, 2012
Class P [Member]
|
Mar. 31, 2014
KMI EP Capital Trust I, due 2028 [Member]
Class P [Member]
|
Mar. 31, 2013
KMI EP Capital Trust I, due 2028 [Member]
Class P [Member]
|
Mar. 31, 2014
Conversion of EP Trust I Preferred Securities [Member]
|
Mar. 31, 2013
Conversion of EP Trust I Preferred Securities [Member]
|
Apr. 17, 2014
Subsequent Event [Member]
|
Mar. 31, 2014
Kinder Morgan, Inc. [Member]
Warrant [Member]
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| Class of Stock [Line Items] | ||||||||||||||||
| Stock and or Warrant Repurchase Program, Authorized Amount | $ 100 | $ 250 | ||||||||||||||
| Shares, Outstanding | 1,027,904,172 | 1,035,731,820 | 1,030,677,076 | 1,035,668,596 | ||||||||||||
| Stock Repurchased and Retired During Period, Shares | (2,780,337) | 0 | ||||||||||||||
| Stock Issued During Period, Shares, Conversion of Convertible Securities | 933 | 55,319 | ||||||||||||||
| Restriced shares vested (in shares) | 6,500 | 7,905 | ||||||||||||||
| Dividends Per Common Share Declared for the Period | $ 0.42 | $ 0.38 | $ 0.42 | $ 0.38 | $ 0.42 | |||||||||||
| Common Stock, Dividends, Per Share, Cash Paid | $ 0.41 | $ 0.37 | ||||||||||||||
| Class of Warrant or Right, Outstanding | 316,889,310 | 422,924,637 | 347,933,107 | 439,809,442 | ||||||||||||
| Number of Warrants Repurchased | (31,045,227) | (16,969,361) | ||||||||||||||
| Stock and Warrants Issued During Period Number of Warrants | 1,430 | 84,556 | ||||||||||||||
| Debt Instrument, Convertible, Conversion Ratio | 1 | |||||||||||||||
| Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 45 | |||||||||||||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | 40 | |||||||||||||||