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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 4, 17 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10A, 10B false 7 Long-term derivative asset 4 us-gaap_DerivativeAssetsNoncurrent us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 57000000 57 true false false 4 false true false false 57000000 57 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false true false false 57000000 57 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments which are expected to exist longer than one year or beyond the normal operating cycle, if longer, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 4, 17 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10A, 10B false 8 Short-term derivative liability 4 us-gaap_DerivativeLiabilitiesCurrent us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false -38000000 -38 true false false 4 false true false false -38000000 -38 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false true false false -25000000 -25 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10A, 10B Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 4, 17 false 9 Long-term derivative liability 4 us-gaap_DerivativeLiabilitiesNoncurrent us-gaap true credit instant No definition available. false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false -13000000 -13 true false false 4 false true false false -13000000 -13 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false true false false -12000000 -12 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of after one year or beyond the normal operating cycle, if longer, net of the effects of master netting arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 4, 17 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10A, 10B true 10 Total derivatives 4 us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet us-gaap true debit instant No definition available. false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 18000000 18 true false false 4 false true false false 18000000 18 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false true false false 54000000 54 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 4, 17 true 12 Asset Derivatives 4 us-gaap_DerivativeAssetsAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:stringItemType string No definition available. false 13 Total asset derivatives designated as hedging instruments under ASC 815-20 5 us-gaap_DerivativeAssetDesignatedAsHedgingInstrumentFairValue us-gaap true debit instant No definition available. false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 73000000 73 true false false 4 false true false false 73000000 73 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false true false false 4000000 4 true false false 24 false true false false 47000000 47 true false false 25 false true false false 1000000 1 true false false 26 false true false false 10000000 10 true false false 27 false true false false 11000000 11 true false false 28 false true false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false true false false 104000000 104 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false true false false 14000000 14 true false false 57 false true false false 17000000 17 true false false 58 false true false false 10000000 10 true false false 59 false true false false 20000000 20 true false false 60 false true false false 40000000 40 true false false 61 false true false false 3000000 3 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Fair value of a derivative asset (or nonderivative instrument) that is designated and qualifies as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 true 14 Total asset derivatives 5 us-gaap_DerivativeFairValueOfDerivativeAsset us-gaap true debit instant No definition available. false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 73000000 73 true false false 4 false true false false 73000000 73 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false true false false 104000000 104 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 true 15 Liability Derivatives 4 us-gaap_DerivativeLiabilitiesAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:stringItemType string No definition available. false 16 Total liability derivatives designated as hedging instruments under ASC 815-20 5 us-gaap_DerivativeLiabilityDesignatedAsHedgingInstrumentFairValue us-gaap true credit instant No definition available. false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 53000000 53 true false false 4 false true false false 53000000 53 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false true false false 38000000 38 true false false 26 false true false false 2000000 2 true false false 27 false true false false 1000000 1 true false false 28 false true false false 12000000 12 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false true false false 50000000 50 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false true false false 35000000 35 true false false 59 false true false false 0 0 true false false 60 false true false false 0 0 true false false 61 false true false false 15000000 15 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Fair value of a derivative liability (or nonderivative instrument) that is designated and qualifies as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 true 17 Total liability derivatives not designated as hedging instruments under ASC 815-20 5 bni_DerivativeLiabilitiesNotDesignatedAsHedgingInstrumentFairValue bni false credit instant Fair value of a derivative liability that is not designated or qualifying as a hedging instrument, presented on a gross basis... false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 2000000 2 true false false 4 false true false false 2000000 2 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false true false false 1000000 1 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false true false false 1000000 1 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false true false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false true false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false true false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Fair value of a derivative liability that is not designated or qualifying as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. No authoritative reference available. true 18 Total liability derivatives 5 us-gaap_DerivativeFairValueOfDerivativeLiability us-gaap true credit instant No definition available. false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 55000000 55 true false false 4 false true false false 55000000 55 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false true false false 50000000 50 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 true 19 Effects of Derivative Instruments Gains and Losses 3 us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:stringItemType string No definition available. false 20 Amount of Gain or (Loss) Recognized in OCI on Derivatives (Effective Portion) 4 us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false -58000000 -58 true false false 19 false true false false 10000000 10 true false false 20 false true false false 0 0 true false false 21 false true false false -58000000 -58 true false false 22 false true false false 10000000 10 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false true false false -79000000 -79 true false false 49 false true false false 204000000 204 true false false 50 false true false false 237000000 237 true false false 51 false true false false 0 0 true false false 52 false true false false 65000000 65 true false false 53 false true false false -79000000 -79 true false false 54 false true false false 204000000 204 true false false 55 false true false false 172000000 172 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b -Clause 2 true 21 Amount of Gain or (Loss) Recognized from AOCI into Income (Effective Portion) 4 us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false true false false 7000000 7 true false false 9 false true false false 14000000 14 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false 7000000 7 true false false 19 false true false false 14000000 14 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false true false false -6000000 -6 true false false 34 false true false false -60000000 -60 true false false 35 false true false false -166000000 -166 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false true false false -6000000 -6 true false false 49 false true false false -60000000 -60 true false false 50 false true false false -166000000 -166 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary The income statement location of the effective portion of net gain or loss reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b -Clause 3 true 22 Amount of Gain or (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing) 4 us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false true false false -7000000 -7 [1] true false false 9 false true false false 1000000 1 [1] true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false true false false -7000000 -7 [1] true false false 19 false true false false 1000000 1 [1] true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false true false false -7000000 -7 [1] true false false 34 false true false false 15000000 15 [1] true false false 35 false true false false 16000000 16 [1] true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false true false false -7000000 -7 [1] true false false 49 false true false false 15000000 15 [1] true false false 50 false true false false 16000000 16 [1] true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b true 23 Amount of Gain or (Loss) Recognized in Income on Derivatives Not Designated as Hedging Instruments under ASC 815-20 4 us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false -12000000 -12 true false false 4 false true false false 1000000 1 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false true false false -12000000 -12 true false false 11 false true false false 1000000 1 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false true false false 0 0 true false false 15 false true false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false true false false 0 0 true false false 30 false true false false 10000000 10 true false false 31 false true false false -32000000 -32 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false true false false 0 0 true false false 37 false true false false 0 0 true false false 38 false true false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false true false false 0 0 true false false 43 false true false false 10000000 10 true false false 44 false true false false -32000000 -32 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Net gain (loss) included in earnings for the period from the net change in fair value of derivative instrument not designated as hedging instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1)(b) true 24 Fair Value Interest Rate Hedges 3 us-gaap_GainLossOnFairValueHedgesRecognizedInEarningsAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:stringItemType string No definition available. false 25 Gain (Loss) on Fixed-rate Debt 4 us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false true false false -20000000 -20 true false false 17 false true false false -18000000 -18 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false true false false -6000000 -6 true false false 46 false true false false 30000000 30 true false false 47 false true false false 41000000 41 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Amount of unrealized gain (loss) included in earnings for the period related to the fair value of the hedged item in an interest rate fair value hedge, which was offset by the gain (loss) on the hedging instrument to the extent that the fair value hedge is determined to be effective. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) false 26 Gain (Loss) on Interest Rate Swaps 4 us-gaap_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false true false false 21000000 21 true false false 13 false true false false 19000000 19 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false true false false 6000000 6 true false false 40 false true false false -30000000 -30 true false false 41 false true false false -41000000 -41 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Amount of unrealized gain (loss) related to the fair value of interest rate derivatives designated as fair value hedging instruments. Recognized in earnings and offsets the gain (loss) on the hedged item to the extent that the fair value hedge is determined to be effective. No authoritative reference available. false 27 Derivative Activities (Textuals) [Abstract] 3 bni_DerivativeActivitiesTextualsAbstract bni false na duration Derivative Activities. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:stringItemType string Derivative Activities. false 28 Credit Rating for Counterparties 4 bni_CreditRatingForCounterparties bni false na instant Credit Rating for Counterparties. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 A2/A or higher false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:stringItemType string Credit Rating for Counterparties. No authoritative reference available. false 29 Gross derivative asset exposure to counterparty credit risk 4 us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 73000000 73 false false false 2 false true false false 104000000 104 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Reflects the maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A -Subparagraph b false 30 Net derivative asset exposure to counterparty credit risk 4 bni_ConcentrationRiskCreditRiskFinancialInstrumentNetExposure bni false debit instant Reflects the amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity... false false false false false false false false false false false verboselabel false 1 false true false false 67000000 67 false false false 2 false true false false 90000000 90 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Reflects the amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity, net of any master netting arrangements. No authoritative reference available. false 31 Estimate of hedge instrument losses that will be reclassified from accumulated other comprehensive income into earnings within twelve months 4 us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 8000000 8 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary The estimated net amount of existing gains (losses) on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(2) false 32 Fuel costs as a percent of total operating expenses 4 bni_FuelCostsAsPercentOfTotalOperatingExpenses bni false na duration Fuel costs as a percent of total operating expenses. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false true false false 0.24 0.24 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false true false false 0.25 0.25 true false false 30 false false false false 0 0 true false false 31 false true false false 0.21 0.21 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false us-types:percentItemType pure Fuel costs as a percent of total operating expenses. No authoritative reference available. false 33 Total fuel derivative position by year as a percentage of prior consumption 4 bni_TotalFuelDerivativePositionInPercentage bni false na duration Fuel-derivative position coverage of future years based on the average annual locomotive fuel consumption over the past three... false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false true false false 0.22 0.22 true false false 6 false true false false 0.03 0.03 true false false 7 false true false false 0.18 0.18 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:pureItemType pure Fuel-derivative position coverage of future years based on the average annual locomotive fuel consumption over the past three years. No authoritative reference available. false 34 Fuel derivative agreements, in gallons 4 invest_DerivativeNonmonetaryNotionalAmount invest false na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 432000000 432000000 false false false 2 false true false false 561000000 561000000 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:decimalItemType decimal Aggregate notional amount of derivative expressed in nonmonetary units. For example the number of barrels specified in a fuel oil forward purchase contract. No authoritative reference available. false 35 Fair value of open fuel derivative instruments under an agreement requiring collateral 4 us-gaap_DerivativeNetLiabilityPositionAggregateFairValue us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 16000000 16 false false false 2 false true false false 18000000 18 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain or loss on that instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44D -Subparagraph b false 36 Collateral outstanding 4 us-gaap_CollateralAlreadyPostedAggregateFairValue us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 false false false 2 false true false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44D -Subparagraph c false 37 Number of fair value hedge separate swap agreements 4 bni_NumberOfSeparateSwapsAgreement bni false na instant Number of fair value hedge separate swap agreements false false false false false false false false false false false verboselabel false 1 false false false false 0 0 9 false false false 2 false false false false 0 0 9 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:stringItemType string Number of fair value hedge separate swap agreements No authoritative reference available. false 38 Notional amount of interest rate swaps 4 us-gaap_NotionalAmountOfFairValueHedgeInstruments us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false true false false 650000000 650 true false false 65 false true false false 650000000 650 true false false xbrli:monetaryItemType monetary Aggregate notional amount of all derivatives designated as a fair value hedging instrument. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument. No authoritative reference available. false 39 Average fixed rate 4 us-gaap_DerivativeAverageFixedInterestRate us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false true false false 0.0628 0.0628 true false false 65 false false false false 0 0 true false false us-types:percentItemType pure Average fixed interest rate related to the group of interest rate derivatives. No authoritative reference available. false 40 Outstanding cash flow hedges 4 us-gaap_DescriptionOfInterestRateCashFlowHedgeActivities us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 0 0 false false false 2 false false false false 0 0 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:stringItemType string General discussion of the entity's interest rate cash flow hedge activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44 false 41 Unrecognized gains on closed interest rate hedges 4 us-gaap_UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncome us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 true true false false 8000000 8 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 true false false 63 false false false false 0 0 true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:monetaryItemType monetary Amount of unrealized gain (loss) related to the increase (decrease) in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 46 false 42 Minimum credit rating for which collateral threshold would be eliminated 4 us-gaap_DerivativeCreditRiskRelatedContingentFeaturesTriggeringCircumstances us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false 17 false false false false 0 0 true false false 18 false false false false 0 0 true false false 19 false false false false 0 0 true false false 20 false false false false 0 0 true false false 21 false false false false 0 0 true false false 22 false false false false 0 0 true false false 23 false false false false 0 0 true false false 24 false false false false 0 0 true false false 25 false false false false 0 0 true false false 26 false false false false 0 0 true false false 27 false false false false 0 0 true false false 28 false false false false 0 0 true false false 29 false false false false 0 0 true false false 30 false false false false 0 0 true false false 31 false false false false 0 0 true false false 32 false false false false 0 0 true false false 33 false false false false 0 0 true false false 34 false false false false 0 0 true false false 35 false false false false 0 0 true false false 36 false false false false 0 0 true false false 37 false false false false 0 0 true false false 38 false false false false 0 0 true false false 39 false false false false 0 0 true false false 40 false false false false 0 0 true false false 41 false false false false 0 0 true false false 42 false false false false 0 0 true false false 43 false false false false 0 0 true false false 44 false false false false 0 0 true false false 45 false false false false 0 0 true false false 46 false false false false 0 0 true false false 47 false false false false 0 0 true false false 48 false false false false 0 0 true false false 49 false false false false 0 0 true false false 50 false false false false 0 0 true false false 51 false false false false 0 0 true false false 52 false false false false 0 0 true false false 53 false false false false 0 0 true false false 54 false false false false 0 0 true false false 55 false false false false 0 0 true false false 56 false false false false 0 0 true false false 57 false false false false 0 0 true false false 58 false false false false 0 0 true false false 59 false false false false 0 0 true false false 60 false false false false 0 0 true false false 61 false false false false 0 0 true false false 62 false false false false 0 0 BB- (S&P) BB- (S&P) true false false 63 false false false false 0 0 Ba3 (Moody’s) Ba3 (Moody’s) true false false 64 false false false false 0 0 true false false 65 false false false false 0 0 true false false xbrli:stringItemType string Description of the circumstances in which credit-risk-related contingent features could be triggered in derivative instruments that are in a net liability position at the end of the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44D -Subparagraph a false 1 No portion of the gain or (loss) was excluded from the assessment of hedge effectiveness for the periods then ended. 65 37 false Millions UnKnown UnKnown true true