$ALE
ALLETE INC Stock $ale

$ale Overview Financials Valuation SEC Filings Company Website

2013 Form 10-K Financial Statement

#000006675614000026 Filed on February 14, 2014

Income Statement

Concept	2013	2012 Q4	2012 Q3
Revenue	$1.018B	$256.0M	$248.8M
YoY Change	5.95%	7.02%	9.65%
Cost Of Revenue	$71.20M
YoY Change
Gross Profit	$947.2M
YoY Change
Gross Profit Margin	93.01%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$116.6M	$25.80M	$25.00M
YoY Change	16.37%	10.73%	10.13%
% of Gross Profit	12.31%
Operating Expenses	$267.7M	$208.1M	$203.2M
YoY Change	-32.59%	1.51%	8.09%
Operating Profit	$154.1M	$47.90M	$45.60M
YoY Change	-0.71%	40.06%	17.22%
Interest Expense	$50.30M	-$6.000M	$12.30M
YoY Change	10.55%	20.0%	12.84%
% of Operating Profit	32.64%	-12.53%	26.97%
Other Income/Expense, Net	-$20.70M	$1.600M	-$5.900M
YoY Change	2.99%	100.0%	3.51%
Pretax Income	$133.4M	$43.50M	$39.70M
YoY Change	-1.26%	45.0%	19.58%
Income Tax	$28.70M	$14.60M	$10.30M
% Of Pretax Income	21.51%	33.56%	25.94%
Net Earnings	$104.7M	$28.90M	$29.40M
YoY Change	7.83%	51.31%	43.41%
Net Earnings / Revenue	10.28%	11.29%	11.82%
Basic Earnings Per Share	$2.64	$0.76	$0.78
Diluted Earnings Per Share	$2.63	$0.75	$0.78
COMMON SHARES
Basic Shares Outstanding	39.70M shares		37.70M shares
Diluted Shares Outstanding	39.80M shares		37.80M shares

Balance Sheet

Concept	2013	2012 Q4	2012 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$97.30M	$80.80M	$104.3M
YoY Change	20.42%	-20.08%	-22.8%
Cash & Equivalents	$97.30M	$80.80M	$104.3M
Short-Term Investments
Other Short-Term Assets	$54.10M	$11.10M	$5.600M
YoY Change	61.01%	15.63%	-1.75%
Inventory	$59.30M	$69.80M	$76.70M
Prepaid Expenses
Receivables	$96.30M	$89.00M	$73.20M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$307.0M	$273.2M	$278.0M
YoY Change	12.37%	-1.37%	-8.19%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.665B	$2.348B	$2.240B
YoY Change	13.52%	18.4%	17.76%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$171.0M	$107.3M	$105.5M
YoY Change	-31.82%	8.49%	7.76%
Other Assets	$332.4M	$41.50M	$40.40M
YoY Change	-12.94%	5.87%	14.77%
Total Long-Term Assets	$3.170B	$2.980B	$2.860B
YoY Change	6.36%	14.67%	16.66%
TOTAL ASSETS
Total Short-Term Assets	$307.0M	$273.2M	$278.0M
Total Long-Term Assets	$3.170B	$2.980B	$2.860B
Total Assets	$3.477B	$3.253B	$3.138B
YoY Change	6.87%	13.12%	13.93%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$99.90M	$90.50M	$57.40M
YoY Change	10.39%	26.04%	30.16%
Accrued Expenses	$15.70M	$15.60M	$14.20M
YoY Change	0.64%	21.88%	9.23%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$300.0K
YoY Change		-100.0%	-94.64%
Long-Term Debt Due	$27.20M	$84.50M	$67.30M
YoY Change	-67.81%	1464.81%	425.78%
Total Short-Term Liabilities	$230.2M	$283.4M	$214.8M
YoY Change	-18.77%	73.76%	76.07%
LONG-TERM LIABILITIES
Long-Term Debt	$1.083B	$933.6M	$947.6M
YoY Change	16.0%	8.82%	12.22%
Other Long-Term Liabilities	$341.6M	$123.3M	$109.4M
YoY Change	-17.01%	17.32%	7.36%
Total Long-Term Liabilities	$1.425B	$1.057B	$1.057B
YoY Change	5.9%	9.75%	11.7%
TOTAL LIABILITIES
Total Short-Term Liabilities	$230.2M	$283.4M	$214.8M
Total Long-Term Liabilities	$1.425B	$1.057B	$1.057B
Total Liabilities	$2.134B	$2.052B	$1.981B
YoY Change	3.97%	14.23%	16.3%
SHAREHOLDERS EQUITY
Retained Earnings		$459.6M	$447.6M
YoY Change		6.49%	4.65%
Common Stock		$784.7M	$759.4M
YoY Change		11.21%	12.22%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.343B	$1.201B	$1.158B
YoY Change
Total Liabilities & Shareholders Equity	$3.477B	$3.253B	$3.138B
YoY Change	6.87%	13.12%	13.93%

Cashflow Statement

Concept	2013	2012 Q4	2012 Q3
OPERATING ACTIVITIES
Net Income	$104.7M	$28.90M	$29.40M
YoY Change	7.83%	51.31%	43.41%
Depreciation, Depletion And Amortization	$116.6M	$25.80M	$25.00M
YoY Change	16.37%	10.73%	10.13%
Cash From Operating Activities	$239.4M	$44.10M	$67.40M
YoY Change	-0.08%	-22.08%	22.32%
INVESTING ACTIVITIES
Capital Expenditures	$328.5M	-$73.90M	-$110.1M
YoY Change	-19.05%	-10.32%	68.87%
Acquisitions	$0.00
YoY Change
Other Investing Activities	$12.30M	-$4.600M	-$4.500M
YoY Change	28.13%	27.78%	66.67%
Cash From Investing Activities	-$336.6M	-$78.50M	-$114.6M
YoY Change	-19.88%	-8.72%	68.78%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$98.20M
YoY Change	27.53%
Debt Paid & Issued, Net	$77.70M
YoY Change	200.0%
Cash From Financing Activities	$113.7M	10.90M	142.9M
YoY Change	-29.03%	-336.96%	108.61%
NET CHANGE
Cash From Operating Activities	$239.4M	44.10M	67.40M
Cash From Investing Activities	-$336.6M	-78.50M	-114.6M
Cash From Financing Activities	$113.7M	10.90M	142.9M
Net Change In Cash	$16.50M	-23.50M	95.70M
YoY Change	-181.28%	-30.88%	71.81%
FREE CASH FLOW
Cash From Operating Activities	$239.4M	$44.10M	$67.40M
Capital Expenditures	$328.5M	-$73.90M	-$110.1M
Free Cash Flow	-$89.10M	$118.0M	$177.5M
YoY Change	-46.39%	-15.11%	47.55%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	90500000	USD
CY2013Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	99900000	USD
CY2013Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	78700000	USD
CY2012Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	70400000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	89000000	USD
CY2013Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	96300000	USD
CY2013Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	11100000	USD
CY2012Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	11900000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-22000000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-17100000	USD
CY2013	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2400000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1600000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2100000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1000000	USD
CY2013Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1100000	USD
CY2012Q4	us-gaap	Allowance For Notes And Loans Receivable Noncurrent AllowanceForNotesAndLoansReceivableNoncurrent	600000	USD
CY2013Q4	us-gaap	Allowance For Notes And Loans Receivable Noncurrent AllowanceForNotesAndLoansReceivableNoncurrent	600000	USD
CY2011	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	900000	USD
CY2013	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1000000	USD
CY2012	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1000000	USD
CY2012	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2013	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2011	us-gaap	Asset Impairment Charges AssetImpairmentCharges	1700000	USD
CY2013Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	81800000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	77900000	USD
CY2011Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	57000000	USD
CY2013	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	4600000	USD
CY2012	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3800000	USD
CY2011	us-gaap	Asset Retirement Obligation Period Increase Decrease AssetRetirementObligationPeriodIncreaseDecrease	300000	USD
CY2013	us-gaap	Asset Retirement Obligation Period Increase Decrease AssetRetirementObligationPeriodIncreaseDecrease	-700000	USD
CY2012	us-gaap	Asset Retirement Obligation Period Increase Decrease AssetRetirementObligationPeriodIncreaseDecrease	17100000	USD
CY2012	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	17100000	USD
CY2013	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-700000	USD
CY2013Q4	us-gaap	Assets Assets	3476800000	USD
CY2012Q4	us-gaap	Assets Assets	3253400000	USD
CY2011Q4	us-gaap	Assets Assets	2876000000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	273200000	USD
CY2013Q4	us-gaap	Assets Current AssetsCurrent	307000000	USD
CY2011Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	24700000	USD
CY2013Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	17700000	USD
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	26800000	USD
CY2013Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	18300000	USD
CY2012Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	27400000	USD
CY2011Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	27300000	USD
CY2013Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	600000	USD
CY2013	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	2200000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	0	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	0	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	1500000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	7800000	USD
CY2013	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	16100000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
CY2013	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
CY2012	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	500000	USD
CY2013	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	0	USD
CY2011	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	100000	USD
CY2013	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	600000	USD
CY2011	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	2700000	USD
CY2012	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	1100000	USD
CY2012Q4	us-gaap	Available For Sale Securities Noncurrent AvailableForSaleSecuritiesNoncurrent	26800000	USD
CY2013Q4	us-gaap	Available For Sale Securities Noncurrent AvailableForSaleSecuritiesNoncurrent	17700000	USD
CY2011	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	0	USD
CY2013	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	-2200000	USD
CY2012	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	0	USD
CY2014Q1	us-gaap	Business Acquisition Cost Of Acquired Entity Transaction Costs BusinessAcquisitionCostOfAcquiredEntityTransactionCosts	27000000	USD
CY2014Q1	us-gaap	Business Acquisition Effective Date Of Acquisition1 BusinessAcquisitionEffectiveDateOfAcquisition1	2014-01-30
CY2011	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	5900000	USD
CY2012	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	20200000	USD
CY2013	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	8300000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	97300000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	80800000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	101100000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	44900000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-20300000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	56200000	USD
CY2013	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	16500000	USD
CY2013Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.78
CY2012	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.84
CY2013	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.90
CY2012Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2013Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	80000000	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	80000000	shares
CY2013Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	41400000	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	39400000	shares
CY2013Q4	us-gaap	Common Stock Value CommonStockValue	885200000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	784700000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	104000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	88100000	USD
CY2013	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	109600000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	USD
CY2013	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-200000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	87900000	USD
CY2013	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	109600000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	104000000	USD
CY2011	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	0.126
CY2012	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	0.123
CY2013	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	0.120
CY2012	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	308700000	USD
CY2013	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	334800000	USD
CY2011	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	306600000	USD
CY2013	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1400000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-200000	USD
CY2013	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	100000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	500000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-1600000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	500000	USD
CY2013	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	100000	USD
CY2012Q4	us-gaap	Customer Deposits Current CustomerDepositsCurrent	28800000	USD
CY2013Q4	us-gaap	Customer Deposits Current CustomerDepositsCurrent	26000000	USD
CY2012Q4	us-gaap	Debt Current DebtCurrent	84500000	USD
CY2013Q4	us-gaap	Debt Current DebtCurrent	27200000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	27400000	USD
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	22900000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	37000000	USD
CY2012Q4	us-gaap	Deferred Fuel Cost DeferredFuelCost	22500000	USD
CY2013Q4	us-gaap	Deferred Fuel Cost DeferredFuelCost	23000000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	35800000	USD
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	28600000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	37500000	USD
CY2011	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	-900000	USD
CY2013	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	-800000	USD
CY2012	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	-900000	USD
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	6500000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	9300000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1400000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	323700000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	333300000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	430700000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	460100000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	0	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	19000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	321300000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	325300000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	0	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	19000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	112800000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	90800000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	24600000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	16900000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	82200000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	59800000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	55100000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	28300000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	120200000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	66300000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	8000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2400000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	752000000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	785400000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	6900000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	0	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	22700000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	423800000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	479100000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	30100000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	656200000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	577100000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	58700000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	104300000	USD
CY2013	us-gaap	Depreciation Depreciation	116600000	USD
CY2012	us-gaap	Depreciation Depreciation	100200000	USD
CY2011	us-gaap	Depreciation Depreciation	90400000	USD
CY2012	us-gaap	Dividends Common Stock DividendsCommonStock	69100000	USD
CY2013	us-gaap	Dividends Common Stock DividendsCommonStock	75200000	USD
CY2011	us-gaap	Dividends Common Stock DividendsCommonStock	62100000	USD
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.64
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.66
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.59
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2013Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2013Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.82
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.66
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.83
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.76
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.36
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.65
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.58
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.63
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.78
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.35
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2013Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.281
CY2013	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.215
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.276
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2013	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2013	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2011	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2012	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2013	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1000000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	900000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	700000	USD
CY2011	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	7400000	USD
CY2012	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	7700000	USD
CY2013	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	8400000	USD
CY2013	us-gaap	Employee Stock Ownership Plan Esop Debt Structure Employer Loan Description EmployeeStockOwnershipPlanESOPDebtStructureEmployerLoanDescription	In 1990, the ESOP issued a $75.0 million note (term not to exceed 25 years at 10.25 percent) to use as consideration for 2.8 million shares (1.9 million shares adjusted for stock splits) of our newly issued common stock. The note was refinanced in 2006 at 6 percent.
CY2012Q4	us-gaap	Employee Stock Ownership Plan Esop Deferred Shares Fair Value EmployeeStockOwnershipPlanESOPDeferredSharesFairValue	28700000	USD
CY2013Q4	us-gaap	Employee Stock Ownership Plan Esop Deferred Shares Fair Value EmployeeStockOwnershipPlanESOPDeferredSharesFairValue	24100000	USD
CY2011Q4	us-gaap	Employee Stock Ownership Plan Esop Deferred Shares Fair Value EmployeeStockOwnershipPlanESOPDeferredSharesFairValue	42000000	USD
CY2011Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Allocated Shares EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares	2200000	shares
CY2013Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Allocated Shares EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares	2000000	shares
CY2012Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Allocated Shares EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares	2200000	shares
CY2012Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	700000	shares
CY2011Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	1000000	shares
CY2013Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	500000	shares
CY2012Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	2900000	shares
CY2013Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	2500000	shares
CY2011Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	3200000	shares
CY2012Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	28000000	USD
CY2013Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	13100000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-3700000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	35600000	USD
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28700000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	38000000	USD
CY2012	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	15700000	USD
CY2013	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	16100000	USD
CY2013Q4	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	0.08
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Assets EquityMethodInvestmentSummarizedFinancialInformationAssets	3337800000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Assets EquityMethodInvestmentSummarizedFinancialInformationAssets	3590200000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	63100000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	80700000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	251500000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	381400000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity EquityMethodInvestmentSummarizedFinancialInformationEquity	1532600000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity EquityMethodInvestmentSummarizedFinancialInformationEquity	1440500000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities And Equity EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity	3337800000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities And Equity EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity	3590200000	USD
CY2011	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	223900000	USD
CY2013	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	247600000	USD
CY2012	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	237400000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	3509500000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	3274700000	USD
CY2011	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	567200000	USD
CY2012	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	603200000	USD
CY2013	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	626300000	USD
CY2013Q4	us-gaap	Equity Method Investments EquityMethodInvestments	114600000	USD
CY2012Q4	us-gaap	Equity Method Investments EquityMethodInvestments	107300000	USD
CY2011Q4	us-gaap	Equity Method Investments EquityMethodInvestments	98900000	USD
CY2013Q4	us-gaap	Escrow Deposit EscrowDeposit	5400000	USD
CY2013	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-400000	USD
CY2011	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-900000	USD
CY2012	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	200000	USD
CY2013	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2012	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2011	us-gaap	Impairment Of Investments ImpairmentOfInvestments	1700000	USD
CY2013	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
CY2012	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	135100000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	129200000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	133400000	USD
CY2013	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	20300000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	19400000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	18400000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-3200000	USD
CY2013	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-4200000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	47300000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	45200000	USD
CY2013	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	46700000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1000000	USD
CY2013	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-900000	USD
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-700000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6000000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1200000	USD
CY2013	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4300000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	4300000	USD
CY2013	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	19200000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	7600000	USD
CY2013	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	500000	USD
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0	USD
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-11400000	USD
CY2012Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	2200000	USD
CY2013Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	0	USD
CY2013	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-8600000	USD
CY2011	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	18600000	USD
CY2012	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-10100000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-1500000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-9500000	USD
CY2013	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	1100000	USD
CY2013	us-gaap	Increase Decrease In Allowance For Equity Funds Used During Construction IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction	4600000	USD
CY2011	us-gaap	Increase Decrease In Allowance For Equity Funds Used During Construction IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction	2500000	USD
CY2012	us-gaap	Increase Decrease In Allowance For Equity Funds Used During Construction IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction	5100000	USD
CY2013	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	10500000	USD
CY2012	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-700000	USD
CY2011	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-9100000	USD
CY2013	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	1400000	USD
CY2011	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	15400000	USD
CY2012	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	21800000	USD
CY2012	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-20900000	USD
CY2011	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-7500000	USD
CY2013	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-18300000	USD
CY2013	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-7100000	USD
CY2012	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	800000	USD
CY2011	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	7900000	USD
CY2013	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-10800000	USD
CY2012	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-8800000	USD
CY2011	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-24700000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1500000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-6500000	USD
CY2013	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1400000	USD
CY2011	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2013	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	5400000	USD
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2012	us-gaap	Interest Expense InterestExpense	45500000	USD
CY2011	us-gaap	Interest Expense InterestExpense	43600000	USD
CY2013	us-gaap	Interest Expense InterestExpense	50300000	USD
CY2012	us-gaap	Interest Paid Net InterestPaidNet	42700000	USD
CY2013	us-gaap	Interest Paid Net InterestPaidNet	47500000	USD
CY2011	us-gaap	Interest Paid Net InterestPaidNet	43200000	USD
CY2012Q4	us-gaap	Interest Payable Current InterestPayableCurrent	15600000	USD
CY2013Q4	us-gaap	Interest Payable Current InterestPayableCurrent	15700000	USD
CY2012Q4	us-gaap	Inventory Net InventoryNet	69800000	USD
CY2013Q4	us-gaap	Inventory Net InventoryNet	59300000	USD
CY2012Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	41800000	USD
CY2013Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	46200000	USD
CY2013Q4	us-gaap	Jointly Owned Utility Plant Gross Ownership Amount Of Plant In Service JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService	438900000	USD
CY2013Q4	us-gaap	Jointly Owned Utility Plant Ownership Amount Of Construction Work In Progress JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress	129200000	USD
CY2013Q4	us-gaap	Jointly Owned Utility Plant Ownership Amount Of Plant Accumulated Depreciation JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation	198500000	USD
CY2013Q4	us-gaap	Land Available For Sale LandAvailableForSale	85400000	USD
CY2012Q4	us-gaap	Land Available For Sale LandAvailableForSale	86500000	USD
CY2011Q4	us-gaap	Land Available For Sale LandAvailableForSale	86000000	USD
CY2013	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	13800000	USD
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	9400000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	11500000	USD
CY2013Q4	us-gaap	Liabilities Liabilities	2133900000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	2052400000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3253400000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3476800000	USD
CY2013Q4	us-gaap	Liabilities Current LiabilitiesCurrent	230200000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	283400000	USD
CY2012Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	0	USD
CY2013Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent	5400000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	1018100000	USD
CY2013Q4	us-gaap	Long Term Debt LongTermDebt	1110200000	USD
CY2013Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	27200000	USD
CY2012Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	84500000	USD
CY2012Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	1143700000	USD
CY2013Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	1131700000	USD
CY2013Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	864200000	USD
CY2013Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1700000	USD
CY2013Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	51800000	USD
CY2013Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	22300000	USD
CY2013Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	143000000	USD
CY2013Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1083000000	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	933600000	USD
CY2011Q3	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	8800000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	113700000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	55400000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	160200000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-336600000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-420100000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-240900000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	239600000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	241700000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	239400000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	93800000	USD
CY2013	us-gaap	Net Income Loss NetIncomeLoss	104700000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	97100000	USD
CY2013Q4	us-gaap	Net Income Loss NetIncomeLoss	33000000	USD
CY2013Q2	us-gaap	Net Income Loss NetIncomeLoss	14000000	USD
CY2013Q3	us-gaap	Net Income Loss NetIncomeLoss	25200000	USD
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	32500000	USD
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	28900000	USD
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	29400000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	14400000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	24400000	USD
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2013	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-200000	USD
CY2013	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	104700000	USD
CY2011	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	93800000	USD
CY2012	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	97100000	USD
CY2013	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-20700000	USD
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-20800000	USD
CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-20100000	USD
CY2012Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	1400000	USD
CY2013Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	1400000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	150000000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	155200000	USD
CY2013	us-gaap	Operating Income Loss OperatingIncomeLoss	154100000	USD
CY2013Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	46900000	USD
CY2013Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	38400000	USD
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	38400000	USD
CY2013Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	44400000	USD
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	23300000	USD
CY2012Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	47900000	USD
CY2013Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	24400000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	45600000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	12100000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	7400000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	8700000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	9500000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	11500000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	29200000	USD
CY2013Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	26600000	USD
CY2012Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	33800000	USD
CY2013Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	45400000	USD
CY2012Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	45400000	USD
CY2013Q4	us-gaap	Other Assets Current OtherAssetsCurrent	12100000	USD
CY2012Q4	us-gaap	Other Assets Current OtherAssetsCurrent	11100000	USD
CY2013Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	68600000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	41500000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	800000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2011	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-300000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1200000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	4600000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4900000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-5700000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	6900000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	5100000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-4800000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-5900000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	3900000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	3300000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-3600000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	-2700000	USD
CY2013	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	3100000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	0	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-100000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-3500000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-200000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-300000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	100000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-200000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	0	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	1200000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-300000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1200000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-300000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	800000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-100000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
CY2013	us-gaap	Other Income OtherIncome	2500000	USD
CY2012	us-gaap	Other Income OtherIncome	900000	USD
CY2011	us-gaap	Other Income OtherIncome	1900000	USD
CY2012Q4	us-gaap	Other Investments OtherInvestments	4900000	USD
CY2013Q4	us-gaap	Other Investments OtherInvestments	4500000	USD
CY2012Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	62600000	USD
CY2013Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	52600000	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	123300000	USD
CY2013Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	127200000	USD
CY2012Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	143500000	USD
CY2013Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	146300000	USD
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6000000	USD
CY2011	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4400000	USD
CY2013	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	9300000	USD
CY2013Q4	us-gaap	Other Real Estate OtherRealEstate	3100000	USD
CY2012Q4	us-gaap	Other Real Estate OtherRealEstate	3200000	USD
CY2011	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	7400000	USD
CY2013	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	12300000	USD
CY2012	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	9600000	USD
CY2011	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2012	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1300000	USD
CY2013	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1400000	USD
CY2013	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	75200000	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	69100000	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	62100000	USD
CY2013	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	4700000	USD
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1800000	USD
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	2300000	USD
CY2014Q1	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	1200000	USD
CY2012	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	4700000	USD
CY2011	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	2000000	USD
CY2013	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	3100000	USD
CY2012	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	4700000	USD
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	239200000	USD
CY2013	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	328500000	USD
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	405800000	USD
CY2011	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	23600000	USD
CY2013	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	21000000	USD
CY2012	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	27500000	USD
CY2012Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	228200000	USD
CY2013Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	133400000	USD
CY2013Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	35100000	USD
CY2012Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	33600000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	39100000	USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	77000000	USD
CY2013	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	98200000	USD
CY2013Q2	us-gaap	Proceeds From Issuance Of First Mortgage Bond ProceedsFromIssuanceOfFirstMortgageBond	150000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	81400000	USD
CY2013	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	169800000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	180600000	USD
CY2011	us-gaap	Proceeds From Repayments Of Notes Payable ProceedsFromRepaymentsOfNotesPayable	100000	USD
CY2013	us-gaap	Proceeds From Repayments Of Notes Payable ProceedsFromRepaymentsOfNotesPayable	0	USD
CY2012	us-gaap	Proceeds From Repayments Of Notes Payable ProceedsFromRepaymentsOfNotesPayable	-1100000	USD
CY2013	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	16100000	USD
CY2012	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	1500000	USD
CY2011	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	7800000	USD
CY2011	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	2200000	USD
CY2013	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	1300000	USD
CY2012	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	300000	USD
CY2013	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	11400000	USD
CY2013	us-gaap	Profit Loss ProfitLoss	104700000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	93600000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	97100000	USD
CY2011	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	246800000	USD
CY2013	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	339500000	USD
CY2012	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	432200000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2576500000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2347600000	USD
CY2013	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1300000	USD
CY2011	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1200000	USD
CY2012	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1000000	USD
CY2013	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	1500000	USD
CY2012	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	200000	USD
CY2012Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	91100000	USD
CY2013Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	89900000	USD
CY2013	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	300000	USD
CY2012	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	961200000	USD
CY2011	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	928200000	USD
CY2013	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	1018400000	USD
CY2013Q4	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	268000000	USD
CY2012Q4	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	256000000	USD
CY2013Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	251000000	USD
CY2013Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	235600000	USD
CY2012Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	216400000	USD
CY2012Q4	us-gaap	Regulatory Assets RegulatoryAssets	362800000	USD
CY2013Q1	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	263800000	USD
CY2012Q1	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	240000000	USD
CY2012Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	248800000	USD
CY2013Q4	us-gaap	Regulatory Assets RegulatoryAssets	286800000	USD
CY2013Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	23000000	USD
CY2012Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	22500000	USD
CY2012Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	340300000	USD
CY2013Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	263800000	USD
CY2012Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	60100000	USD
CY2013Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	81000000	USD
CY2013	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	77700000	USD
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	25900000	USD
CY2011	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	3100000	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	489100000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	459600000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	1600000	USD
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	2400000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	2100000	USD
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	395678	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	460234	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	108299	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	41.59
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	41.71
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	43.17
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	500000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	300000	USD
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2200000	USD
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	0	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	19855	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	15481	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2008	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Grant Date Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValue	6.18
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	460234	shares
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	560887	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	395678	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	108299	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	44.10
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	42.28
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	41.68
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	40.69
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	35.84
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	41.60
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	34.25
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	43.96
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	44.86
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0.00
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.00
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.00
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0.00
CY2013Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	200000	USD
CY2013	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	287379	shares
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	49075	shares
CY2011	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	80798	shares
CY2012	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	0	USD
CY2011	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	20000000	USD
CY2013	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	0	USD
CY2011	us-gaap	Stock Issued During Period Value Employee Stock Ownership Plan StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan	7800000	USD
CY2012	us-gaap	Stock Issued During Period Value Employee Stock Ownership Plan StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan	7700000	USD
CY2013	us-gaap	Stock Issued During Period Value Employee Stock Ownership Plan StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan	7000000	USD
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	69500000	USD
CY2013	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	100500000	USD
CY2012	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	79100000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	976000000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	1201000000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	1079300000	USD
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	1342900000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1201000000	USD
CY2013Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1342900000	USD
CY2012Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	30200000	USD
CY2013Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	34800000	USD
CY2013Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	18700000	USD
CY2012Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	17400000	USD
CY2013Q4	us-gaap	Unearned Esop Shares UnearnedESOPShares	14300000	USD
CY2012Q4	us-gaap	Unearned Esop Shares UnearnedESOPShares	21300000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1200000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2700000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	11400000	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	12300000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	8700000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	900000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	2900000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2013	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	0	USD
CY2011	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	0	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	100000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1300000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	500000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	1100000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	500000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	400000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	-600000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	200000	USD
CY2013	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	864300000	USD
CY2012	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	806000000	USD
CY2011	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	778200000	USD
CY2013	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	116600000	USD
CY2012	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	100200000	USD
CY2011	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	90400000	USD
CY2012	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	397100000	USD
CY2011	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	381200000	USD
CY2013	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	412900000	USD
CY2012	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2013	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	100000	shares
CY2011	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	100000	shares
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	39800000	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	37600000	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	35400000	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	37600000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	35300000	shares
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39700000	shares
CY2012	ale	Ale Real Estate Other Additions ALERealEstateOtherAdditions	700000	USD
CY2013	ale	Ale Real Estate Other Additions ALERealEstateOtherAdditions	400000	USD
CY2012Q4	ale	Accounts Receivable Current Net Net Of Income Taxes Receivable AccountsReceivableCurrentNetNetOfIncomeTaxesReceivable	86800000	USD
CY2013Q4	ale	Accounts Receivable Current Net Net Of Income Taxes Receivable AccountsReceivableCurrentNetNetOfIncomeTaxesReceivable	96300000	USD
CY2013Q4	ale	Availableforsale Securities Debt Maturities After Five Years Fair Value AvailableforsaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue	2500000	USD
CY2013Q4	ale	Availableforsale Securities Debt Maturities After One Year Through Three Years Fair Value AvailableforsaleSecuritiesDebtMaturitiesAfterOneYearThroughThreeYearsFairValue	4700000	USD
CY2013Q4	ale	Availableforsale Securities Debt Maturities After Three Years Through Five Years Fair Value AvailableforsaleSecuritiesDebtMaturitiesAfterThreeYearsThroughFiveYearsFairValue	2000000	USD
CY2013Q4	ale	Debt Instrument Actual Indebtedness To Total Capital Ratio DebtInstrumentActualIndebtednessToTotalCapitalRatio	0.45
CY2013Q4	ale	Debt Instrument Required Indebtedness To Total Capital Ratio DebtInstrumentRequiredIndebtednessToTotalCapitalRatio	0.65
CY2012Q4	ale	Deferred Tax Liabilty Partnership Basis Differences DeferredTaxLiabiltyPartnershipBasisDifferences	28600000	USD
CY2013Q4	ale	Deferred Tax Liabilty Partnership Basis Differences DeferredTaxLiabiltyPartnershipBasisDifferences	36700000	USD
CY2013	ale	Defined Contribution Plan Employer Matching Contribution Amount DefinedContributionPlanEmployerMatchingContributionAmount	8400000	USD
CY2012	ale	Defined Contribution Plan Employer Matching Contribution Amount DefinedContributionPlanEmployerMatchingContributionAmount	7700000	USD
CY2013	ale	Effective Income Tax Rate Reconciliation Regulatory Differences EffectiveIncomeTaxRateReconciliationRegulatoryDifferences	-2200000	USD
CY2012	ale	Effective Income Tax Rate Reconciliation Regulatory Differences EffectiveIncomeTaxRateReconciliationRegulatoryDifferences	-2200000	USD
CY2011	ale	Effective Income Tax Rate Reconciliation Regulatory Differences EffectiveIncomeTaxRateReconciliationRegulatoryDifferences	-1200000	USD
CY2013Q4	ale	Equity Method Investment Approved Return On Common Equity EquityMethodInvestmentApprovedReturnOnCommonEquity	0.122
CY2013Q4	ale	Equity Method Investment Summarized Financial Information Long Term Debt EquityMethodInvestmentSummarizedFinancialInformationLongTermDebt	1550000000	USD
CY2012Q4	ale	Equity Method Investment Summarized Financial Information Long Term Debt EquityMethodInvestmentSummarizedFinancialInformationLongTermDebt	1550000000	USD
CY2012	ale	Equity Method Investment Summarized Financial Information Operating Expense EquityMethodInvestmentSummarizedFinancialInformationOperatingExpense	281000000	USD
CY2013	ale	Equity Method Investment Summarized Financial Information Operating Expense EquityMethodInvestmentSummarizedFinancialInformationOperatingExpense	295100000	USD
CY2011	ale	Equity Method Investment Summarized Financial Information Operating Expense EquityMethodInvestmentSummarizedFinancialInformationOperatingExpense	261600000	USD
CY2011	ale	Equity Method Investment Summarized Financial Information Other Expense EquityMethodInvestmentSummarizedFinancialInformationOtherExpense	81700000	USD
CY2013	ale	Equity Method Investment Summarized Financial Information Other Expense EquityMethodInvestmentSummarizedFinancialInformationOtherExpense	83600000	USD
CY2012	ale	Equity Method Investment Summarized Financial Information Other Expense EquityMethodInvestmentSummarizedFinancialInformationOtherExpense	84800000	USD
CY2013Q4	ale	Equity Method Investment Summarized Financial Information Other Non Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationOtherNonCurrentLiabilities	126200000	USD
CY2012Q4	ale	Equity Method Investment Summarized Financial Information Other Non Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationOtherNonCurrentLiabilities	95800000	USD
CY2013Q4	ale	Equity Method Investment Total Expected Investmentfor Current Year EquityMethodInvestmentTotalExpectedInvestmentforCurrentYear	5800000	USD
CY2013Q4	ale	Expected Proceedsfrom Future Issuanceof First Mortgage Bonds ExpectedProceedsfromFutureIssuanceofFirstMortgageBonds	215000000	USD
CY2013	ale	Fair Value Activity In Level3 FairValueActivityInLevel3	0	USD
CY2012	ale	Fair Value Activity In Level3 FairValueActivityInLevel3	0	USD
CY2013	ale	Fair Value Hierarchy Transfers All Levels FairValueHierarchyTransfersAllLevels	0	USD
CY2012	ale	Fair Value Hierarchy Transfers All Levels FairValueHierarchyTransfersAllLevels	0	USD
CY2013	ale	Gain Loss On Real Estate Foreclosure GainLossOnRealEstateForeclosure	0	USD
CY2012	ale	Gain Loss On Real Estate Foreclosure GainLossOnRealEstateForeclosure	0	USD
CY2011	ale	Gain Loss On Real Estate Foreclosure GainLossOnRealEstateForeclosure	-500000	USD
CY2012Q4	ale	Investments Cash And Cash Equivalents Fair Value Disclosure InvestmentsCashAndCashEquivalentsFairValueDisclosure	20700000	USD
CY2013Q4	ale	Investments Cash And Cash Equivalents Fair Value Disclosure InvestmentsCashAndCashEquivalentsFairValueDisclosure	34200000	USD
CY2013	ale	Morelikelythannotdefined Morelikelythannotdefined	0.50
CY2013	ale	Real Estate Sales Revenue Recognition Minimum Contract Price Cash Collections Requirement RealEstateSalesRevenueRecognitionMinimumContractPriceCashCollectionsRequirement	0.20
CY2011Q3	ale	Stock Issued During Period Shares Purchase Of Non Controlling Interest StockIssuedDuringPeriodSharesPurchaseOfNonControllingInterest	200000	shares
CY2013	dei	Amendment Flag AmendmentFlag	false
CY2013	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2013	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2013	dei	Document Period End Date DocumentPeriodEndDate	2013-12-31
CY2013	dei	Document Type DocumentType	10-K
CY2013	dei	Entity Central Index Key EntityCentralIndexKey	0000066756
CY2014Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	41817714	shares
CY2013	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2013	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013Q2	dei	Entity Public Float EntityPublicFloat	1989608714	USD
CY2013	dei	Entity Registrant Name EntityRegistrantName	ALLETE INC
CY2013	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2013	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes

Files In Submission

Name	View Source	Status
0000066756-14-000026-index-headers.html	Edgar Link	pending
0000066756-14-000026-index.html	Edgar Link	pending
0000066756-14-000026.txt	Edgar Link	pending
0000066756-14-000026-xbrl.zip	Edgar Link	pending
ale-20131231.xml	Edgar Link	completed
ale-20131231.xsd	Edgar Link	pending
ale-20131231_cal.xml	Edgar Link	unprocessable
ale-20131231_def.xml	Edgar Link	unprocessable
ale-20131231_lab.xml	Edgar Link	unprocessable
ale-20131231_pre.xml	Edgar Link	unprocessable
ale12312013-10k.htm	Edgar Link	pending
exhibit1-12x31x2013.htm	Edgar Link	pending
exhibit10e612-31x2013.htm	Edgar Link	pending
exhibit10j1412-31x2013.htm	Edgar Link	pending
exhibit10l412-31x2013.htm	Edgar Link	pending
exhibit1212-31x2013.htm	Edgar Link	pending
exhibit14j1512-31x2013.htm	Edgar Link	pending
exhibit2112-31x2013.htm	Edgar Link	pending
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exhibit4c312-31x2013.htm	Edgar Link	pending
exhibit9512-31x2013.htm	Edgar Link	pending
exhibit9912-31x2013.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
logoallete201310k.jpg	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$ALE
ALLETE INC Stock $ale

2013 Form 10-K Financial Statement

#000006675614000026 Filed on February 14, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ALE ALLETE INC Stock $ale

2013 Form 10-K Financial Statement

#000006675614000026 Filed on February 14, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ALE
ALLETE INC Stock $ale