$NI
NISOURCE INC. Stock $ni

$ni Overview Financials Valuation SEC Filings Company Website

2013 Q2 Form 10-Q Financial Statement

#000111171113000038 Filed on July 31, 2013

Income Statement

Concept	2013 Q2	2012 Q2
Revenue	$1.202B	$1.039B
YoY Change	15.66%	-14.68%
Cost Of Revenue	$349.3M	$238.8M
YoY Change	46.27%	-48.37%
Gross Profit	$852.2M	$800.0M
YoY Change	6.53%	4.47%
Gross Profit Margin	70.93%	77.01%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$143.3M	$147.3M
YoY Change	-2.72%	9.52%
% of Gross Profit	16.82%	18.41%
Operating Expenses	$666.2M	$603.5M
YoY Change	10.39%	0.15%
Operating Profit	$194.0M	$202.4M
YoY Change	-4.15%	25.25%
Interest Expense	$102.0M	$103.2M
YoY Change	-1.16%	9.32%
% of Operating Profit	52.58%	50.99%
Other Income/Expense, Net	-$88.70M	-$100.4M
YoY Change	-11.65%	7.04%
Pretax Income	$105.3M	$104.6M
YoY Change	0.67%	45.89%
Income Tax	$32.90M	$36.30M
% Of Pretax Income	31.24%	34.7%
Net Earnings	$71.70M	$69.40M
YoY Change	3.31%	72.64%
Net Earnings / Revenue	5.97%	6.68%
Basic Earnings Per Share	$0.23	$0.24
Diluted Earnings Per Share	$0.23	$0.22
COMMON SHARES
Basic Shares Outstanding	312.2M shares	284.4M shares
Diluted Shares Outstanding	313.2M shares	295.8M shares

Balance Sheet

Concept	2013 Q2	2012 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$45.00M	$53.00M
YoY Change	-15.09%	-11.67%
Cash & Equivalents	$44.50M	$52.80M
Short-Term Investments
Other Short-Term Assets	$224.4M	$274.2M
YoY Change	-18.16%	-46.96%
Inventory	$420.0M	$428.0M
Prepaid Expenses
Receivables	$716.5M	$553.3M
Other Receivables	$87.00M	$44.00M
Total Short-Term Assets	$1.708B	$1.752B
YoY Change	-2.51%	0.38%
LONG-TERM ASSETS
Property, Plant & Equipment	$13.47B	$12.15B
YoY Change	10.91%	7.56%
Goodwill	$3.666B	$3.677B
YoY Change	-0.3%
Intangibles
YoY Change
Long-Term Investments	$469.0M	$368.0M
YoY Change	27.45%	5.75%
Other Assets	$5.972B	$6.140B
YoY Change	-2.75%	210.43%
Total Long-Term Assets	$19.91B	$18.66B
YoY Change	6.73%	6.0%
TOTAL ASSETS
Total Short-Term Assets	$1.708B	$1.752B
Total Long-Term Assets	$19.91B	$18.66B
Total Assets	$21.62B	$20.41B
YoY Change	5.94%	5.5%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$393.0M	$292.1M
YoY Change	34.54%	-7.56%
Accrued Expenses	$415.0M	$363.0M
YoY Change	14.33%	-1.36%
Deferred Revenue
YoY Change
Short-Term Debt	$377.7M	$327.6M
YoY Change	15.29%	-62.34%
Long-Term Debt Due	$71.00M	$767.0M
YoY Change	-90.74%	2456.67%
Total Short-Term Liabilities	$2.068B	$2.662B
YoY Change	-22.32%	4.08%
LONG-TERM LIABILITIES
Long-Term Debt	$7.617B	$6.807B
YoY Change	11.9%	7.37%
Other Long-Term Liabilities	$216.4M	$242.1M
YoY Change	-10.62%	-91.85%
Total Long-Term Liabilities	$6.234B	$5.835B
YoY Change	6.84%	-37.32%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.068B	$2.662B
Total Long-Term Liabilities	$6.234B	$5.835B
Total Liabilities	$8.302B	$8.497B
YoY Change	-2.29%	-40.76%
SHAREHOLDERS EQUITY
Retained Earnings	$1.164B	$980.9M
YoY Change	18.68%
Common Stock	$4.649B	$4.224B
YoY Change	10.07%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$48.50M	$40.50M
YoY Change	19.75%
Treasury Stock Shares
Shareholders Equity	$5.703B	$5.105B
YoY Change
Total Liabilities & Shareholders Equity	$21.62B	$20.41B
YoY Change	5.94%	5.5%

Cashflow Statement

Concept	2013 Q2	2012 Q2
OPERATING ACTIVITIES
Net Income	$71.70M	$69.40M
YoY Change	3.31%	72.64%
Depreciation, Depletion And Amortization	$143.3M	$147.3M
YoY Change	-2.72%	9.52%
Cash From Operating Activities	$445.4M	$291.8M
YoY Change	52.64%	-7.04%
INVESTING ACTIVITIES
Capital Expenditures	-$432.4M	-$326.9M
YoY Change	32.27%	38.75%
Acquisitions
YoY Change
Other Investing Activities	-$39.60M	$52.70M
YoY Change	-175.14%	-514.96%
Cash From Investing Activities	-$472.0M	-$274.2M
YoY Change	72.14%	10.43%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-30.30M	-3.300M
YoY Change	818.18%	-95.16%
NET CHANGE
Cash From Operating Activities	445.4M	291.8M
Cash From Investing Activities	-472.0M	-274.2M
Cash From Financing Activities	-30.30M	-3.300M
Net Change In Cash	-56.90M	14.30M
YoY Change	-497.9%	-650.0%
FREE CASH FLOW
Cash From Operating Activities	$445.4M	$291.8M
Capital Expenditures	-$432.4M	-$326.9M
Free Cash Flow	$877.8M	$618.7M
YoY Change	41.88%	12.59%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	538900000	USD
CY2013Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	393000000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	907300000	USD
CY2013Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	716500000	USD
CY2012Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	160600000	USD
CY2013Q2	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	156400000	USD
CY2013Q2	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	22900000	USD
CY2012Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	24800000	USD
CY2013Q2	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	9000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-65500000	USD
CY2013Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-62000000	USD
CY2013Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-62300000	USD
CY2013Q2	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	800000	USD
CY2013Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	4646000000	USD
CY2012Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	4597600000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8700000	USD
CY2013Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4400000	USD
CY2012Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4100000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7300000	USD
CY2013Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	32200000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	24000000	USD
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	4700000	USD
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	4600000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	500000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	600000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	0	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	3000000	USD
	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	1500000	USD
	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	600000	USD
	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	700000	USD
	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	0	USD
CY2012Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	160400000	USD
CY2013Q2	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	167100000	USD
CY2011Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	146400000	USD
CY2012Q2	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	149700000	USD
CY2013Q2	us-gaap	Assets Assets	21621600000	USD
CY2012Q4	us-gaap	Assets Assets	21844700000	USD
CY2013Q2	us-gaap	Assets Current AssetsCurrent	1707600000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	2352400000	USD
CY2012Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	26700000	USD
CY2013Q2	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	0	USD
CY2012Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	26700000	USD
CY2013Q2	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	0	USD
CY2013Q2	us-gaap	Available For Sale Securities AvailableForSaleSecurities	108600000	USD
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	111800000	USD
CY2012Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	107900000	USD
CY2013Q2	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	109700000	USD
	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	1300000	USD
CY2012	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	4000000	USD
	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	-2400000	USD
CY2012	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	-100000	USD
	us-gaap	Basis Of Accounting BasisOfAccounting	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Basis of Accounting Presentation</font></div><div style="line-height:120%;padding-top:6px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The accompanying Condensed Consolidated Financial Statements (unaudited) for NiSource (the “Company”) reflect all normal recurring adjustments that are necessary, in the opinion of management, to present fairly the results of operations in accordance with GAAP in the United States of America.</font></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The accompanying financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in NiSource’s Annual Report on Form 10-K for the fiscal year ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2012</font><font style="font-family:inherit;font-size:10pt;">. Income for interim periods may not be indicative of results for the calendar year due to weather variations and other factors.</font></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Condensed Consolidated Financial Statements (unaudited) have been prepared pursuant to the rules and regulations of the SEC. Certain information and note disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations, although NiSource believes that the disclosures made are adequate to make the information not misleading.</font></div></div>
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	105600000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	146500000	USD
CY2012Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	12373400000	USD
CY2013Q2	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	13319400000	USD
CY2013Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	44500000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	36300000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	11500000	USD
CY2012Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	52800000	USD
	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	121800000	USD
	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	-1600000	USD
	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	11200000	USD
	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	6900000	USD
CY2012Q4	us-gaap	Commercial Paper CommercialPaper	499600000	USD
CY2013Q2	us-gaap	Commercial Paper CommercialPaper	117600000	USD
CY2013Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.73
CY2012Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.24
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.70
CY2013Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.25
CY2013Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2013Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2013Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	312420078	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	310280867	shares
CY2013Q2	us-gaap	Common Stock Value CommonStockValue	3100000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	3100000	USD
CY2013Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	72000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	263500000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	335700000	USD
CY2012Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	71300000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	1047600000	USD
CY2013Q2	us-gaap	Cost Of Revenue CostOfRevenue	359900000	USD
CY2012Q2	us-gaap	Cost Of Revenue CostOfRevenue	238800000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	866200000	USD
CY2012Q4	us-gaap	Customer Deposits Current CustomerDepositsCurrent	269600000	USD
CY2013Q2	us-gaap	Customer Deposits Current CustomerDepositsCurrent	164700000	USD
CY2013Q2	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	7400000000	USD
CY2013Q2	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	7687400000	USD
CY2012Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	7326300000	USD
CY2012Q4	us-gaap	Deferred Gas Cost DeferredGasCost	45000000	USD
CY2013Q2	us-gaap	Deferred Gas Cost DeferredGasCost	600000	USD
	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	129000000	USD
	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	167400000	USD
CY2012Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	42800000	USD
CY2013Q2	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	5100000	USD
CY2012Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	0	USD
CY2013Q2	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	37200000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	2953300000	USD
CY2013Q2	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	3062700000	USD
CY2013Q2	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	7900000	USD
	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	14300000	USD
	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	12700000	USD
CY2012Q2	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	6900000	USD
CY2013Q2	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	143300000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	286900000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	292700000	USD
CY2012Q2	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	147300000	USD
CY2003Q3	us-gaap	Derivative Average Basis Spread On Variable Rate DerivativeAverageBasisSpreadOnVariableRate	0.0078
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	148200000	USD
CY2013Q2	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	73500000	USD
CY2013Q2	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	52500000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	115500000	USD
CY2003Q3	us-gaap	Derivative Fixed Interest Rate DerivativeFixedInterestRate	0.0540
CY2012Q4	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	92200000	USD
CY2013Q2	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	39600000	USD
CY2013Q2	us-gaap	Derivative Instruments And Hedges Liabilities DerivativeInstrumentsAndHedgesLiabilities	47500000	USD
CY2012Q4	us-gaap	Derivative Instruments And Hedges Liabilities DerivativeInstrumentsAndHedgesLiabilities	95200000	USD
CY2013Q2	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	33900000	USD
CY2012Q4	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	56000000	USD
CY2013Q2	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	36400000	USD
	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	0	USD
CY2013Q2	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	5000000	USD
CY2012Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	20300000	USD
CY2012Q2	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2012Q2	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	1900000	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	4100000	USD
CY2013Q2	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	-700000	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	13400000	USD
CY2012Q2	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	800000	USD
	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	5100000	USD
CY2013Q2	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	-300000	USD
	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	1700000	USD
CY2013Q1	us-gaap	Disposal Group Including Discontinued Operation Goodwill DisposalGroupIncludingDiscontinuedOperationGoodwill	11000000	USD
CY2012Q4	us-gaap	Disposal Group Including Discontinued Operation Other Assets DisposalGroupIncludingDiscontinuedOperationOtherAssets	5200000	USD
CY2012Q4	us-gaap	Disposal Group Including Discontinued Operation Other Liabilities DisposalGroupIncludingDiscontinuedOperationOtherLiabilities	3900000	USD
CY2012Q4	us-gaap	Disposal Group Including Discontinued Operation Property Plant And Equipment Net DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentNet	21500000	USD
	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	0	USD
	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	20300000	USD
CY2012Q2	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	9800000	USD
CY2013Q2	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	0	USD
CY2013Q2	us-gaap	Dividends Payable Current DividendsPayableCurrent	78100000	USD
CY2012Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	0	USD
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.93
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.06
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.06
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.89
CY2013Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.312
CY2012Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.347
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.347
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.344
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2013Q2	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.035
CY2012Q2	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	377100000	USD
	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	761800000	USD
	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	729700000	USD
CY2013Q2	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	384500000	USD
	us-gaap	Employee Service Share Based Compensation Cash Received From Exercise Of Stock Options EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions	15300000	USD
	us-gaap	Employee Service Share Based Compensation Cash Received From Exercise Of Stock Options EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions	21800000	USD
CY2013Q2	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	25200000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2500000	USD
CY2013Q2	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1400000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3000000	USD
CY2012Q2	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1400000	USD
CY2013Q2	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	38800000	USD
CY2012Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	71700000	USD
CY2012Q4	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	326600000	USD
CY2013Q2	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	266000000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	17200000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	12300000	USD
CY2013Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	281200000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	286600000	USD
	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	0	USD
	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	0	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	400000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	3100000	USD
	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	17500000	USD
CY2012Q2	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	282600000	USD
	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	1285500000	USD
	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	1156300000	USD
CY2013Q2	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	393300000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	3677300000	USD
CY2013Q2	us-gaap	Goodwill Goodwill	3666200000	USD
CY2013Q2	us-gaap	Gross Profit GrossProfit	852400000	USD
	us-gaap	Gross Profit GrossProfit	1959000000	USD
CY2012Q2	us-gaap	Gross Profit GrossProfit	800000000	USD
	us-gaap	Gross Profit GrossProfit	1820800000	USD
CY2013Q2	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	7720200000	USD
CY2013Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	72100000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	260400000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	287500000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	68300000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	104600000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	398600000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	438400000	USD
CY2013Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	104800000	USD
CY2013Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.23
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.92
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.92
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.25
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.88
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.23
CY2013Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.23
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.92
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	8300000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	2400000	USD
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	1100000	USD
CY2013Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-400000	USD
CY2013Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.01
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.14
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.01
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
CY2013Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.14
CY2012Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8500000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	16200000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	15100000	USD
CY2013Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8000000	USD
CY2012Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36300000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	150900000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	138200000	USD
CY2013Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32700000	USD
CY2013Q1	us-gaap	Income Tax Receivable IncomeTaxReceivable	15900000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	7000000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	6000000	USD
CY2012Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	130900000	USD
CY2013Q2	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	6400000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-147500000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-119200000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-304400000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-194500000	USD
	us-gaap	Increase Decrease In Customer Deposits IncreaseDecreaseInCustomerDeposits	-104900000	USD
	us-gaap	Increase Decrease In Customer Deposits IncreaseDecreaseInCustomerDeposits	-111700000	USD
	us-gaap	Increase Decrease In Deferred Gas Cost IncreaseDecreaseInDeferredGasCost	-54100000	USD
	us-gaap	Increase Decrease In Deferred Gas Cost IncreaseDecreaseInDeferredGasCost	-86900000	USD
	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	9500000	USD
	us-gaap	Incremental Common Shares Attributable To Equity Forward Agreements IncrementalCommonSharesAttributableToEquityForwardAgreements	9921000	shares
	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	8500000	USD
	us-gaap	Incremental Common Shares Attributable To Equity Forward Agreements IncrementalCommonSharesAttributableToEquityForwardAgreements	0	shares
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-79300000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-12600000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-200000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-124500000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	4700000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-8500000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-133600000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-73200000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1100000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-9400000	USD
	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	-34800000	USD
	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	-45400000	USD
	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-7300000	USD
	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-40900000	USD
	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-75900000	USD
	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-17400000	USD
	us-gaap	Increase Decrease In Risk Management Assets And Liabilities IncreaseDecreaseInRiskManagementAssetsAndLiabilities	20100000	USD
	us-gaap	Increase Decrease In Risk Management Assets And Liabilities IncreaseDecreaseInRiskManagementAssetsAndLiabilities	-4100000	USD
CY2013Q2	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	350000	shares
	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	270000	shares
	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	327000	shares
CY2012Q2	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	284000	shares
CY2013Q2	us-gaap	Incremental Common Shares Attributable To Equity Forward Agreements IncrementalCommonSharesAttributableToEquityForwardAgreements	0	shares
CY2012Q2	us-gaap	Incremental Common Shares Attributable To Equity Forward Agreements IncrementalCommonSharesAttributableToEquityForwardAgreements	10292000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	466000	shares
CY2013Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	471000	shares
CY2012Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	620000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	607000	shares
	us-gaap	Interest Expense InterestExpense	206500000	USD
	us-gaap	Interest Expense InterestExpense	200600000	USD
CY2013Q2	us-gaap	Interest Expense InterestExpense	102000000	USD
CY2012Q2	us-gaap	Interest Expense InterestExpense	103200000	USD
CY2013Q2	us-gaap	Interest Payable Current InterestPayableCurrent	125200000	USD
CY2012Q4	us-gaap	Interest Payable Current InterestPayableCurrent	133700000	USD
CY2012Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	97400000	USD
CY2013Q2	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	114900000	USD
CY2012Q4	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	437700000	USD
CY2013Q2	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	468500000	USD
CY2013Q2	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	279400000	USD
CY2012Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	243300000	USD
CY2013Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	21621600000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	21844700000	USD
CY2013Q2	us-gaap	Liabilities Current LiabilitiesCurrent	2068000000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3301600000	USD
CY2013Q2	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	0	USD
CY2012Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	6169700000	USD
CY2013Q2	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	6234200000	USD
CY2012Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	3900000	USD
CY2013Q2	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	0	USD
CY2012Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	3900000	USD
CY2013Q2	us-gaap	Line Of Credit Facility Amount Outstanding LineOfCreditFacilityAmountOutstanding	0	USD
CY2012Q4	us-gaap	Line Of Credit Facility Amount Outstanding LineOfCreditFacilityAmountOutstanding	44000000	USD
CY2012Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	6819100000	USD
CY2013Q2	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	7616700000	USD
CY2013Q2	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	70700000	USD
CY2012Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	507200000	USD
CY2013Q2	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	8296200000	USD
	us-gaap	Natural Gas Midstream Revenue NaturalGasMidstreamRevenue	835000000	USD
CY2013Q2	us-gaap	Natural Gas Midstream Revenue NaturalGasMidstreamRevenue	366500000	USD
CY2012Q2	us-gaap	Natural Gas Midstream Revenue NaturalGasMidstreamRevenue	356200000	USD
	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	133000000	USD
	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	5300000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-168200000	USD
CY2012Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	8389000000	USD
CY2013Q2	us-gaap	Longterm Debt Percentage Bearing Variable Interest Amount LongtermDebtPercentageBearingVariableInterestAmount	500000000	USD
CY2012Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	45700000	USD
CY2013Q2	us-gaap	Margin Deposit Assets MarginDepositAssets	27700000	USD
CY2013Q2	us-gaap	Minority Interest Ownership Percentage By Parent MinorityInterestOwnershipPercentageByParent	0.475
	us-gaap	Natural Gas Midstream Revenue NaturalGasMidstreamRevenue	765400000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-161600000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-568900000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-718100000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-567300000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-839900000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	894500000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	771800000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	883300000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	764900000	USD
	us-gaap	Net Income Loss NetIncomeLoss	262800000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	69400000	USD
CY2013Q2	us-gaap	Net Income Loss NetIncomeLoss	71700000	USD
	us-gaap	Net Income Loss NetIncomeLoss	332200000	USD
CY2013Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-88700000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-183200000	USD
CY2012Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-100400000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-203400000	USD
	us-gaap	Operating Expenses OperatingExpenses	1235000000	USD
CY2013Q2	us-gaap	Operating Expenses OperatingExpenses	666900000	USD
	us-gaap	Operating Expenses OperatingExpenses	1352500000	USD
CY2012Q2	us-gaap	Operating Expenses OperatingExpenses	603500000	USD
CY2013Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	193500000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	602000000	USD
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	205000000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	621600000	USD
CY2013Q1	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	600000	USD
CY2013Q2	us-gaap	Other Assets Current OtherAssetsCurrent	224400000	USD
CY2012Q4	us-gaap	Other Assets Current OtherAssetsCurrent	357200000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6138700000	USD
CY2013Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	5971600000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-2500000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-3300000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	300000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-2900000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-1000000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	300000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	1400000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	900000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	1900000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	500000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1900000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	700000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3500000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	300000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-2700000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-700000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-1300000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-5400000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	3500000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	1800000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	300000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	800000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	900000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	300000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	1200000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	600000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1700000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1800000	USD
CY2012Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-200000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1800000	USD
CY2013Q2	us-gaap	Other Deferred Credits Noncurrent OtherDeferredCreditsNoncurrent	92100000	USD
CY2012Q4	us-gaap	Other Deferred Credits Noncurrent OtherDeferredCreditsNoncurrent	84100000	USD
CY2013Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	283800000	USD
CY2012Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	309700000	USD
CY2013Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	216400000	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	226200000	USD
CY2012Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	194400000	USD
CY2012Q2	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	22900000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	24100000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	30000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	991400000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	815300000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-3400000	USD
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CY2013Q2	us-gaap	Other Long Term Investments OtherLongTermInvestments	189100000	USD
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CY2013Q2	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	13473900000	USD
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CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	21642300000	USD
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CY2013Q2	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	1300000	USD
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CY2013Q2	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	145500000	USD
CY2012Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	162800000	USD
CY2013Q2	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1902200000	USD
CY2012Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	2024400000	USD
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CY2013Q2	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	80000000	USD
CY2013Q2	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1610500000	USD
CY2012Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1593300000	USD
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CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	46800000	USD
CY2013Q2	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	29300000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1059600000	USD
CY2013Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1164100000	USD
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CY2013Q2	us-gaap	Revenues Revenues	1212300000	USD
CY2012Q2	us-gaap	Revenues Revenues	1038800000	USD
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CY2013Q2	us-gaap	Sales Revenue Net SalesRevenueNet	1212300000	USD
CY2012Q2	us-gaap	Sales Revenue Net SalesRevenueNet	1038800000	USD
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CY2013Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	6742559	shares
CY2010Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	8000000	shares
CY2013Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	900000	shares
CY2013Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	22.41
CY2013Q2	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	5400000	USD
CY2012Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	776900000	USD
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CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	5554300000	USD
CY2013Q2	us-gaap	Stockholders Equity StockholdersEquity	5702700000	USD
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CY2013Q2	us-gaap	Taxes Payable Current TaxesPayableCurrent	202100000	USD
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CY2012Q4	us-gaap	Transfers Accounted For As Secured Borrowings Associated Liabilities Carrying Amount TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount	233300000	USD
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CY2013Q2	us-gaap	Transfers Accounted For As Secured Borrowings Associated Liabilities Carrying Amount TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount	260100000	USD
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	40500000	USD
CY2013Q2	us-gaap	Treasury Stock Value TreasuryStockValue	48500000	USD
CY2013Q2	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	452900000	USD
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CY2012Q2	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	391100000	USD
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CY2012Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	295767000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	294603000	shares
CY2013Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	313169000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	312601000	shares
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CY2013Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	312177000	shares
	ni	Accretion Recorded As Regulatory Asset Or Liability AccretionRecordedAsRegulatoryAssetOrLiability	4300000	USD
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CY2013Q2	ni	Accrued Liability For Postretirement And Postemployment Benefits Current AccruedLiabilityForPostretirementAndPostemploymentBenefitsCurrent	6100000	USD
CY2012Q4	ni	Accrued Liability For Postretirement And Postemployment Benefits Current AccruedLiabilityForPostretirementAndPostemploymentBenefitsCurrent	6100000	USD
CY2013Q2	ni	Change In Accumulated Other Comprehensive Income Due To Interim Measurement ChangeInAccumulatedOtherComprehensiveIncomeDueToInterimMeasurement	3500000	USD
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CY2013Q2	ni	Change In Pension Projected Benefit Obligation Net Of Plan Assets Due To Interim Measurement ChangeInPensionProjectedBenefitObligationNetOfPlanAssetsDueToInterimMeasurement	30700000	USD
CY2013Q2	ni	Change In Regulatory Assets Due To Interim Measurement ChangeInRegulatoryAssetsDueToInterimMeasurement	30800000	USD
	ni	Contributions To Equity Investees ContributionsToEquityInvestees	7600000	USD
	ni	Contributions To Equity Investees ContributionsToEquityInvestees	32700000	USD
CY2012Q4	ni	Deferred Charges And Other DeferredChargesAndOther	94400000	USD
CY2013Q2	ni	Deferred Charges And Other DeferredChargesAndOther	88100000	USD
CY2013Q2	ni	Deferred Gas Revenue DeferredGasRevenue	64600000	USD
CY2012Q4	ni	Deferred Gas Revenue DeferredGasRevenue	22100000	USD
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	ni	Defined Benefit Plan Periodic Benefit Cost Capitalized DefinedBenefitPlanPeriodicBenefitCostCapitalized	25800000	USD
CY2013Q2	ni	Defined Benefit Plan Periodic Benefit Cost Capitalized DefinedBenefitPlanPeriodicBenefitCostCapitalized	2300000	USD
CY2012Q2	ni	Defined Benefit Plan Periodic Benefit Cost Capitalized DefinedBenefitPlanPeriodicBenefitCostCapitalized	5300000	USD
CY2003Q3	ni	Derivative Number Of Counterparties In Swap Agreement DerivativeNumberOfCounterpartiesInSwapAgreement	4
CY2005Q3	ni	Derivative Number Of Counterparties In Swap Agreement Settled DerivativeNumberOfCounterpartiesInSwapAgreementSettled	6
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CY2012Q4	ni	Exchange Gas Payable ExchangeGasPayable	146200000	USD
CY2013Q2	ni	Exchange Gas Payable ExchangeGasPayable	126300000	USD
CY2013Q2	ni	Exchange Gas Receivable ExchangeGasReceivable	81100000	USD
CY2012Q4	ni	Exchange Gas Receivable ExchangeGasReceivable	51500000	USD
CY2012Q4	ni	Fair Value Assets Measured On Recurring Basis FairValueAssetsMeasuredOnRecurringBasis	260000000	USD
CY2013Q2	ni	Fair Value Assets Measured On Recurring Basis FairValueAssetsMeasuredOnRecurringBasis	182100000	USD
CY2012Q4	ni	Fair Value Liabilities Measured On Recurring Basis FairValueLiabilitiesMeasuredOnRecurringBasis	115500000	USD
CY2013Q2	ni	Fair Value Liabilities Measured On Recurring Basis FairValueLiabilitiesMeasuredOnRecurringBasis	52500000	USD
CY2013Q2	ni	Gross Amounts Not Offset In Statement Of Financial Position GrossAmountsNotOffsetInStatementOfFinancialPosition	-37400000	USD
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CY2012Q4	ni	Gross Amounts Not Offset In Statement Of Financial Position Liabilities GrossAmountsNotOffsetInStatementOfFinancialPositionLiabilities	72700000	USD
CY2013Q2	ni	Gross Amounts Not Offset In Statement Of Financial Position Liabilities GrossAmountsNotOffsetInStatementOfFinancialPositionLiabilities	37400000	USD
CY2013Q2	ni	Gross Amounts Of Recognized Assets GrossAmountsOfRecognizedAssets	73500000	USD
CY2012Q4	ni	Gross Amounts Of Recognized Assets GrossAmountsOfRecognizedAssets	148200000	USD
CY2012Q4	ni	Gross Amounts Of Recognized Liabilities GrossAmountsOfRecognizedLiabilities	-115500000	USD
CY2013Q2	ni	Gross Amounts Of Recognized Liabilities GrossAmountsOfRecognizedLiabilities	-52500000	USD
CY2013Q2	ni	Gross Amounts Offset In Statement Of Financial Position Assets GrossAmountsOffsetInStatementOfFinancialPositionAssets	0	USD
CY2012Q4	ni	Gross Amounts Offset In Statement Of Financial Position Assets GrossAmountsOffsetInStatementOfFinancialPositionAssets	0	USD
CY2012Q4	ni	Gross Amounts Offset In Statement Of Financial Position Liabilities GrossAmountsOffsetInStatementOfFinancialPositionLiabilities	0	USD
CY2013Q2	ni	Gross Amounts Offset In Statement Of Financial Position Liabilities GrossAmountsOffsetInStatementOfFinancialPositionLiabilities	0	USD
CY2013Q2	ni	Guarantee Obligations Maximum Exposure Thereafter GuaranteeObligationsMaximumExposureThereafter	5418100000	USD
CY2013Q2	ni	Guarantee Obligations Maximum Exposure Year Five GuaranteeObligationsMaximumExposureYearFive	507000000	USD
CY2013Q2	ni	Guarantee Obligations Maximum Exposure Year Four GuaranteeObligationsMaximumExposureYearFour	291500000	USD
CY2013Q2	ni	Guarantee Obligations Maximum Exposure Year One GuaranteeObligationsMaximumExposureYearOne	425000000	USD
CY2013Q2	ni	Guarantee Obligations Maximum Exposure Year Three GuaranteeObligationsMaximumExposureYearThree	524200000	USD
CY2013Q2	ni	Guarantee Obligations Maximum Exposure Year Two GuaranteeObligationsMaximumExposureYearTwo	554400000	USD
	ni	Impairment And Gain Loss On Sale Of Assets Net ImpairmentAndGainLossOnSaleOfAssetsNet	-3100000	USD
	ni	Impairment And Gain Loss On Sale Of Assets Net ImpairmentAndGainLossOnSaleOfAssetsNet	-400000	USD
CY2013Q2	ni	Impairment And Gain Loss On Sale Of Assets Net ImpairmentAndGainLossOnSaleOfAssetsNet	-200000	USD
CY2012Q2	ni	Impairment And Gain Loss On Sale Of Assets Net ImpairmentAndGainLossOnSaleOfAssetsNet	-1500000	USD
	ni	Income From Unconsolidated Affiliates IncomeFromUnconsolidatedAffiliates	14900000	USD
	ni	Income From Unconsolidated Affiliates IncomeFromUnconsolidatedAffiliates	15200000	USD
CY2013Q1	ni	Income Tax Refunds IncomeTaxRefunds	75100000	USD
CY2013Q2	ni	Income Tax Refunds IncomeTaxRefunds	70600000	USD
	ni	Increase Decrease In Deferred Charges And Other Non Current Assets IncreaseDecreaseInDeferredChargesAndOtherNonCurrentAssets	-18300000	USD
	ni	Increase Decrease In Deferred Charges And Other Non Current Assets IncreaseDecreaseInDeferredChargesAndOtherNonCurrentAssets	5200000	USD
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	ni	Increase Decrease In Prepayments And Other Current Assets IncreaseDecreaseInPrepaymentsAndOtherCurrentAssets	35200000	USD
	ni	Incremental Common Shares Attributable To Nonqualified Stock Options IncrementalCommonSharesAttributableToNonqualifiedStockOptions	157000	shares
	ni	Incremental Common Shares Attributable To Nonqualified Stock Options IncrementalCommonSharesAttributableToNonqualifiedStockOptions	156000	shares
CY2013Q2	ni	Incremental Common Shares Attributable To Nonqualified Stock Options IncrementalCommonSharesAttributableToNonqualifiedStockOptions	171000	shares
CY2012Q2	ni	Incremental Common Shares Attributable To Nonqualified Stock Options IncrementalCommonSharesAttributableToNonqualifiedStockOptions	201000	shares
	ni	Interest Paid Net Capitalized Interest InterestPaidNetCapitalizedInterest	204500000	USD
	ni	Interest Paid Net Capitalized Interest InterestPaidNetCapitalizedInterest	197200000	USD
CY2012Q4	ni	Legal And Environmental Reserves LegalAndEnvironmentalReserves	42200000	USD
CY2013Q2	ni	Legal And Environmental Reserves LegalAndEnvironmentalReserves	43100000	USD
CY2013Q2	ni	Net Amounts Of Assets Presented In Statement Of Financial Position NetAmountsOfAssetsPresentedInStatementOfFinancialPosition	73500000	USD
CY2012Q4	ni	Net Amounts Of Assets Presented In Statement Of Financial Position NetAmountsOfAssetsPresentedInStatementOfFinancialPosition	148200000	USD
CY2012Q4	ni	Net Amounts Of Liabilities Presented In Statement Of Financial Position NetAmountsOfLiabilitiesPresentedInStatementOfFinancialPosition	-115500000	USD
CY2013Q2	ni	Net Amounts Of Liabilities Presented In Statement Of Financial Position NetAmountsOfLiabilitiesPresentedInStatementOfFinancialPosition	-52500000	USD
CY2013Q2	ni	Net Derivative Position Assets NetDerivativePositionAssets	36100000	USD
CY2012Q4	ni	Net Derivative Position Assets NetDerivativePositionAssets	75500000	USD
CY2012Q4	ni	Net Derivative Position Liabilities NetDerivativePositionLiabilities	-42800000	USD
CY2013Q2	ni	Net Derivative Position Liabilities NetDerivativePositionLiabilities	-15100000	USD
CY2005Q3	ni	Payment For Settlement Of Interest Rate Swap PaymentForSettlementOfInterestRateSwap	35500000	USD
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CY2013Q2	ni	Physical Sale Contract Derivatives Reserves PhysicalSaleContractDerivativesReserves	300000	USD
CY2012Q4	ni	Physical Sale Contract Derivatives Reserves PhysicalSaleContractDerivativesReserves	700000	USD
	ni	Primary Business Segments PrimaryBusinessSegments	3
CY2013Q2	ni	Public Utilities Property Plant And Equipment Other Property At Cost Less Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyAtCostLessAccumulatedDepreciation	297600000	USD
CY2012Q4	ni	Public Utilities Property Plant And Equipment Other Property At Cost Less Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyAtCostLessAccumulatedDepreciation	260000000	USD
CY2013Q2	ni	Public Utilities Property Plant And Equipment Plant In Service Net PublicUtilitiesPropertyPlantAndEquipmentPlantInServiceNet	13176300000	USD
CY2012Q4	ni	Public Utilities Property Plant And Equipment Plant In Service Net PublicUtilitiesPropertyPlantAndEquipmentPlantInServiceNet	12655900000	USD
CY2013Q2	ni	Purchase Sale Agreements Additional Guarantee Obligations PurchaseSaleAgreementsAdditionalGuaranteeObligations	42000000	USD
	ni	Securitization Transaction Fees SecuritizationTransactionFees	1500000	USD
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CY2013Q2	ni	Securitization Transaction Fees SecuritizationTransactionFees	600000	USD
CY2012Q2	ni	Securitization Transaction Fees SecuritizationTransactionFees	900000	USD
	ni	Service Area By County ServiceAreaByCounty	20
CY2013Q2	ni	State Income Tax Benefit Relatedto Remeasurement Net StateIncomeTaxBenefitRelatedtoRemeasurementNet	3300000	USD
	ni	Stock Issued To Employee Savings Plans StockIssuedToEmployeeSavingsPlans	14300000	USD
	ni	Stock Issued To Employee Savings Plans StockIssuedToEmployeeSavingsPlans	12400000	USD
CY2012Q4	ni	Trade Receivables Available For Transfer TradeReceivablesAvailableForTransfer	525300000	USD
CY2013Q2	ni	Trade Receivables Available For Transfer TradeReceivablesAvailableForTransfer	455100000	USD
CY2012Q4	ni	Trade Receivables Not Transferred TradeReceivablesNotTransferred	292000000	USD
CY2013Q2	ni	Trade Receivables Not Transferred TradeReceivablesNotTransferred	195000000	USD
CY2012Q4	ni	Trade Receivables Transferred Net TradeReceivablesTransferredNet	233300000	USD
CY2013Q2	ni	Trade Receivables Transferred Net TradeReceivablesTransferredNet	260100000	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
	dei	Document Period End Date DocumentPeriodEndDate	2013-06-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0001111711
CY2013Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	312580862	shares
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	NISOURCE INC/DE
CY2005Q3	invest	Derivative Notional Amount DerivativeNotionalAmount	900000000	USD
CY2003Q3	invest	Derivative Notional Amount DerivativeNotionalAmount	500000000	USD

Files In Submission

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$NI
NISOURCE INC. Stock $ni

2013 Q2 Form 10-Q Financial Statement

#000111171113000038 Filed on July 31, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NI NISOURCE INC. Stock $ni

2013 Q2 Form 10-Q Financial Statement

#000111171113000038 Filed on July 31, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NI
NISOURCE INC. Stock $ni