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Debt Narrative - Debt and Credit Facilities - Energy (Details) (Energy Segment [Member], USD $) | 0 Months Ended | 3 Months Ended |  |  |  |  |  |  | 0 Months Ended | 3 Months Ended |  |  | 0 Months Ended
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Oct. 23, 2012 | Mar. 31, 2013 CVR Second Lien 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] | Mar. 31, 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] | Mar. 31, 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] | Mar. 31, 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] | Apr. 13, 2011 CRNF [Member] Revolving Credit Facility [Member] | Mar. 31, 2013 CRNF [Member] Base Rate [Member] | Mar. 31, 2013 CRNF [Member] EuroDollar [Member] | Oct. 23, 2012 Issuance of Debt [Member] 2022 Notes [Member] Senior unsecured notes [Member] | Oct. 23, 2012 Repayment of Debt [Member] | Oct. 23, 2012 Payment of accrued interest [Member] | Oct. 23, 2012 Payment of premium [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term Loan Facility |  |  | $ 275,000,000 | $ 225,000,000 | $ 200,000,000 |  |  |  |  |  |  |  |  | $ 125,000,000 |  |  |  | $ 500,000,000 |  |  |
Interest rate, long-term debt |  |  | 9.00% | 10.875% | 9.00% |  |  |  |  |  |  |  |  |  |  |  |  | 6.50% |  |  |
Gain on extinguishment of debt |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Use of portion of debt proceeds | 348,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 323,000,000 | 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 |  |  |  |  |  |  |  |  |  |  |
Percentage spread on debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% | 3.50% |  |  |  |

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- Definition The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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