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Debt Narrative - Debt and Credit Facilities - Energy (Details) (Energy Segment [Member], USD $) | 0 Months Ended | 9 Months Ended | 0 Months Ended |  |  |  |  |  |  | 0 Months Ended | 9 Months Ended |  |  |  | 9 Months Ended | 0 Months Ended
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Oct. 23, 2012 | Sep. 30, 2013 CVR Second Lien Notes [Member] | Oct. 23, 2012 2022 Notes [Member] Senior unsecured notes [Member] | Apr. 06, 2010 CVR Issuers [Member] CVR First Lien Notes [Member] Term Loan [Member] | Apr. 06, 2010 CVR Issuers [Member] CVR Second Lien Notes [Member] Term Loan [Member] | Dec. 15, 2011 CVR Issuers [Member] Additional CVR Notes [Member] Term Loan [Member] | Sep. 30, 2013 CRLLC [Member] ABL Credit Facility [Member] Revolving Credit Facility [Member] | Dec. 31, 2012 CRLLC [Member] ABL Credit Facility [Member] Revolving Credit Facility [Member] | Dec. 01, 2012 CRLLC [Member] ABL Credit Facility [Member] Revolving Credit Facility [Member] | Dec. 01, 2012 CRLLC [Member] ABL Credit Facility [Member] Letter of Credit [Member] | Sep. 30, 2013 CRLLC [Member] Letter of Credit [Member] Revolving Credit Facility [Member] | Jun. 04, 2012 CRLLC [Member] Debt repurchase percentage of principal amount authorized if change of control [Member] CVR Notes [Member] Term Loan [Member] | May 04, 2012 CRLLC [Member] Debt repurchase percentage of principal amount authorized if change of control [Member] CVR Notes [Member] Term Loan [Member] | Sep. 30, 2013 CRLLC [Member] Debt repurchase percentage of principal amount authorized if change of control [Member] CVR Notes [Member] Term Loan [Member] | Apr. 13, 2011 CRNF [Member] Term Loan [Member] | Sep. 30, 2013 CRNF [Member] Revolving Credit Facility [Member] | Apr. 13, 2011 CRNF [Member] Revolving Credit Facility [Member] | Sep. 30, 2013 CRNF [Member] Base Rate [Member] | Sep. 30, 2013 CRNF [Member] EuroDollar [Member] | Oct. 23, 2012 Extinguishment of Debt, Type [Domain] | Oct. 23, 2012 Payment of accrued interest [Member] | Oct. 23, 2012 Payment of premium [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term Loan Facility |  |  | $ 500,000,000 | $ 275,000,000 | $ 225,000,000 | $ 200,000,000 |  |  |  |  |  |  |  |  | $ 125,000,000 |  |  |  |  |  |  |
Interest rate, long-term debt |  |  | 6.50% | 9.00% | 10.875% | 9.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on extinguishment of debt |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Use of portion of debt proceeds | 323,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 348,000,000 | 2,000,000 | 23,000,000
Gross proceeds from sale of senior unsecured notes |  |  | 493,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Premium |  |  |  |  |  |  |  |  |  |  |  |  | 54,000,000 |  |  |  |  |  |  |  |  |
Redemption of debt instrument, premium written off |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,000,000 |  |  |  |  |  |  |  |
Redemption percentage of principal amount |  |  |  |  |  |  |  |  |  |  |  | 101.00% | 101.00% |  |  |  |  |  |  |  |  |
Line of credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,000,000 |  |  |  |  |
Senior credit facility, maximum borrowing availability |  |  |  |  |  |  | 373,000,000 |  | 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, incremental borrowing increase |  |  |  |  |  |  |  |  | 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit sublimit as a percentage of total facility commitment |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, potential increase in maximum borrowing capacity if covenant requirements met |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000 |  |  |  |  |
Line of credit facility, outstanding borowings |  |  |  |  |  |  | $ 27,000,000 | $ 0 |  |  | $ 0 |  |  |  |  | $ 0 |  |  |  |  |  |
Percentage spread on debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% | 3.50% |  |  |

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