$XEL
XCEL ENERGY INC Stock $xel

$xel Overview Financials Valuation SEC Filings Company Website

2016 Q4 Form 10-K Financial Statement

#000007290317000008 Filed on February 24, 2017

Income Statement

Concept	2016 Q4	2015 Q4	2015 Q3
Revenue	$2.795B	$2.646B	$2.901B
YoY Change	5.64%	-9.66%	1.1%
Cost Of Revenue	$261.9M	$249.5M	$74.30M
YoY Change	4.97%	-44.31%	-30.82%
Gross Profit	$2.533B	$2.396B	$2.827B
YoY Change	5.7%	-3.4%	2.34%
Gross Profit Margin	90.62%	90.57%	97.44%
Selling, General & Admin	$67.50M	$59.40M	$57.30M
YoY Change	13.64%	-24.04%	-23.8%
% of Gross Profit	2.67%	2.48%	2.03%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$363.5M	$325.4M	$318.1M
YoY Change	11.71%	12.56%	9.09%
% of Gross Profit	14.35%	13.58%	11.25%
Operating Expenses	$2.056B	$1.955B	$2.041B
YoY Change	5.13%	-6.42%	-2.65%
Operating Profit	$465.0M	$441.0M	$785.8M
YoY Change	5.44%	12.72%	18.05%
Interest Expense	-$148.9M	-$129.5M	$152.6M
YoY Change	14.98%	6.41%	6.53%
% of Operating Profit	-32.02%	-29.36%	19.42%
Other Income/Expense, Net	$9.000M	$7.700M	$1.626M
YoY Change	16.88%	-47.26%	15.81%
Pretax Income	$337.2M	$319.3M	$665.5M
YoY Change	5.61%	12.35%	17.88%
Income Tax	$109.8M	$110.2M	$239.0M
% Of Pretax Income	32.56%	34.51%	35.92%
Net Earnings	$227.0M	$209.0M	$426.5M
YoY Change	8.6%	6.46%	15.7%
Net Earnings / Revenue	8.12%	7.9%	14.7%
Basic Earnings Per Share	$0.45	$0.41	$0.84
Diluted Earnings Per Share	$0.45	$0.41	$0.84
COMMON SHARES
Basic Shares Outstanding	508.0M shares	507.5M shares	508.0M shares
Diluted Shares Outstanding			508.4M shares

Balance Sheet

Concept	2016 Q4	2015 Q4	2015 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$84.00M	$85.00M	$404.0M
YoY Change	-1.18%	6.25%	192.75%
Cash & Equivalents	$85.00M	$85.00M	$404.4M
Short-Term Investments
Other Short-Term Assets	$1.377B	$1.493B	$1.554B
YoY Change	-7.77%	-19.77%	-6.67%
Inventory	$604.0M	$608.6M	$645.0M
Prepaid Expenses
Receivables	$776.0M	$724.6M	$741.2M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$2.842B	$2.770B	$3.344B
YoY Change	2.59%	-17.66%	4.62%
LONG-TERM ASSETS
Property, Plant & Equipment	$32.84B	$31.21B	$29.83B
YoY Change	5.24%	8.52%	7.96%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$133.0M	$130.0M	$80.30M
YoY Change	2.31%	56.44%	-4.97%
Other Assets	$248.0M	$32.58M	$182.1M
YoY Change	661.18%	-81.48%	2.65%
Total Long-Term Assets	$38.31B	$36.05B	$34.69B
YoY Change	6.27%	7.32%	7.83%
TOTAL ASSETS
Total Short-Term Assets	$2.842B	$2.770B	$3.344B
Total Long-Term Assets	$38.31B	$36.05B	$34.69B
Total Assets	$41.16B	$38.82B	$38.03B
YoY Change	6.01%	5.04%	7.54%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.045B	$961.0M	$924.3M
YoY Change	8.74%	-18.08%	-12.92%
Accrued Expenses	$173.0M	$167.0M	$143.0M
YoY Change	3.59%	5.03%	8.33%
Deferred Revenue
YoY Change
Short-Term Debt	$392.0M	$846.0M	$64.00M
YoY Change	-53.66%	-17.02%	-90.82%
Long-Term Debt Due	$250.0M	$450.0M	$457.0M
YoY Change	-44.44%		77.13%
Total Short-Term Liabilities	$3.247B	$4.058B	$3.085B
YoY Change	-19.99%	-0.15%	-11.12%
LONG-TERM LIABILITIES
Long-Term Debt	$14.20B	$12.40B	$12.69B
YoY Change	14.49%	7.82%	10.34%
Other Long-Term Liabilities	$225.0M	$261.8M	$263.5M
YoY Change	-14.04%	-1.09%	8.01%
Total Long-Term Liabilities	$225.0M	$261.8M	$263.5M
YoY Change	-14.04%	-1.09%	8.01%
TOTAL LIABILITIES
Total Short-Term Liabilities	$3.247B	$4.058B	$3.085B
Total Long-Term Liabilities	$225.0M	$261.8M	$263.5M
Total Liabilities	$3.472B	$4.320B	$3.348B
YoY Change	-19.63%	-0.21%	-9.86%
SHAREHOLDERS EQUITY
Retained Earnings	$3.982B	$3.553B	$3.507B
YoY Change	12.08%	10.3%	10.37%
Common Stock	$7.149B	$7.158B	$7.142B
YoY Change	-0.12%	0.79%	0.88%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$11.02B	$10.60B	$10.54B
YoY Change
Total Liabilities & Shareholders Equity	$41.16B	$38.82B	$38.03B
YoY Change	6.01%	5.04%	7.54%

Cashflow Statement

Concept	2016 Q4	2015 Q4	2015 Q3
OPERATING ACTIVITIES
Net Income	$227.0M	$209.0M	$426.5M
YoY Change	8.6%	6.46%	15.7%
Depreciation, Depletion And Amortization	$363.5M	$325.4M	$318.1M
YoY Change	11.71%	12.56%	9.09%
Cash From Operating Activities	$639.4M	$535.9M	$980.9M
YoY Change	19.31%	-16.77%	1.67%
INVESTING ACTIVITIES
Capital Expenditures	-$1.069B	-$1.497B	-$708.4M
YoY Change	-28.58%	66.61%	-2.37%
Acquisitions
YoY Change
Other Investing Activities	$13.90M	$13.50M	$200.0K
YoY Change	2.96%	-15.09%	-99.1%
Cash From Investing Activities	-$1.055B	-$1.484B	-$708.2M
YoY Change	-28.88%	68.11%	0.65%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	146.9M	628.2M	-3.900M
YoY Change	-76.62%	248.23%	-98.25%
NET CHANGE
Cash From Operating Activities	639.4M	535.9M	980.9M
Cash From Investing Activities	-1.055B	-1.484B	-708.2M
Cash From Financing Activities	146.9M	628.2M	-3.900M
Net Change In Cash	-268.8M	-319.5M	268.8M
YoY Change	-15.87%	448.97%	603.66%
FREE CASH FLOW
Cash From Operating Activities	$639.4M	$535.9M	$980.9M
Capital Expenditures	-$1.069B	-$1.497B	-$708.4M
Free Cash Flow	$1.708B	$2.033B	$1.689B
YoY Change	-15.96%	31.8%	-0.07%

Facts In Submission

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CY2016	dei	Document Type DocumentType	10-K
CY2016	dei	Entity Central Index Key EntityCentralIndexKey	0000072903
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CY2016	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2016	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2016	dei	Entity Registrant Name EntityRegistrantName	XCEL ENERGY INC
CY2016	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2016	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
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CY2015Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	4300000	USD
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CY2016	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	19378000	USD
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CY2015	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	-73625000	USD
CY2016	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	74965000	USD
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CY2015	us-gaap	Interest Expense InterestExpense	595282000	USD
CY2016	us-gaap	Interest Expense InterestExpense	646907000	USD
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CY2015	us-gaap	Interest Paid Net InterestPaidNet	542860000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	591996000	USD
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CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	2000512000	USD
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CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	431581000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	827054000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	465350000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	2213855000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	237500000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	270100000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	268600000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	260300000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	238000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	2089500000	USD
CY2015Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	32581000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	248532000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-7517000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-7906000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-7783000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-4687000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-5026000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-4944000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	3495000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	3526000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	3471000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	2159000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	2249000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	2185000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	2125000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	2766000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	3711000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	1390000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	1764000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	2344000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1864000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1614000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-601000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	4022000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	4380000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	4312000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-2528000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-2777000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-2759000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-2288000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-2836000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-3708000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-1493000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-1810000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-2342000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1117000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1013000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	415000	USD
CY2016	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	3962000	USD
CY2014	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	595569000	USD
CY2015	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	1257924000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-163000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-70000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	3000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-103000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-46000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	2000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	33000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	21000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
CY2014	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	34352000	USD
CY2015	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	36216000	USD
CY2016	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	36075000	USD
CY2015Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	490197000	USD
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	503953000	USD
CY2015Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	261756000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	223965000	USD
CY2015Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	48900000	USD
CY2016Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	98300000	USD
CY2014	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	4866000	USD
CY2015	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3514000	USD
CY2016	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	2981000	USD
CY2014	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5296000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5400000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7950000	USD
CY2014	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	0	USD
CY2015	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-1326000	USD
CY2016	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-889000	USD
CY2014	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	77507000	USD
CY2015	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	76419000	USD
CY2016	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	75727000	USD
CY2014	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	3695000	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	145000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-789000	USD
CY2014	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	32209000	USD
CY2014	us-gaap	Payments Of Dividends PaymentsOfDividends	561411000	USD
CY2015	us-gaap	Payments Of Dividends PaymentsOfDividends	606574000	USD
CY2016	us-gaap	Payments Of Dividends PaymentsOfDividends	680521000	USD
CY2014	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	2376000	USD
CY2015	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	1392000	USD
CY2016	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	546612000	USD
CY2014	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3199791000	USD
CY2015	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3683359000	USD
CY2016	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3255550000	USD
CY2015Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	941002000	USD
CY2016Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	1112366000	USD
CY2015Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	155734000	USD
CY2016Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	138682000	USD
CY2015Q4	us-gaap	Prepaid Taxes PrepaidTaxes	163023000	USD
CY2016Q4	us-gaap	Prepaid Taxes PrepaidTaxes	106697000	USD
CY2014	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	6000000	USD
CY2015	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	27237000	USD
CY2016	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	4509000	USD
CY2014	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	180798000	USD
CY2015	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	7011000	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	837584000	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1626212000	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2423768000	USD
CY2014	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-11294000	USD
CY2015	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-12024000	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-12487000	USD
CY2014	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	260500000	USD
CY2015	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-173500000	USD
CY2016	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-454000000	USD
CY2014	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	588430000	USD
CY2015	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	1236873000	USD
CY2016	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	478866000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	44413513000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	46832219000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	31205851000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	32841750000	USD
CY2014	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	42765000	USD
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	36074000	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	38960000	USD
CY2014	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	89750000	USD
CY2015	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	55936000	USD
CY2016	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	60547000	USD
CY2015Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	608584000	USD
CY2016Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	604226000	USD
CY2015	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-6362000	USD
CY2016	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-7179000	USD
CY2015Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	344630000	USD
CY2016Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	363655000	USD
CY2015Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	2858741000	USD
CY2016Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	3080867000	USD
CY2015Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	306830000	USD
CY2016Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	220894000	USD
CY2015Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1332889000	USD
CY2016Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1383212000	USD
CY2015Q4	us-gaap	Remaining Amounts Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided	169000000	USD
CY2016Q4	us-gaap	Remaining Amounts Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided	166000000	USD
CY2014	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	275948000	USD
CY2015	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	250882000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1035901000	USD
CY2015Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3552728000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3981652000	USD
CY2014	us-gaap	Revenues Revenues	11686135000	USD
CY2015Q1	us-gaap	Revenues Revenues	2962219000	USD
CY2015Q2	us-gaap	Revenues Revenues	2515134000	USD
CY2015Q3	us-gaap	Revenues Revenues	2901312000	USD
CY2015Q4	us-gaap	Revenues Revenues	2645821000	USD
CY2015	us-gaap	Revenues Revenues	11024486000	USD
CY2016Q1	us-gaap	Revenues Revenues	2772273000	USD
CY2016Q2	us-gaap	Revenues Revenues	2499849000	USD
CY2016Q3	us-gaap	Revenues Revenues	3040147000	USD
CY2016Q4	us-gaap	Revenues Revenues	2794651000	USD
CY2016	us-gaap	Revenues Revenues	11106920000	USD
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	32189000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	44928000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	41170000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	80000	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	33.48
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	588000	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	496000	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	522000	shares
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	29.90
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	36.09
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	36.00
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	1025000	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	984000	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	32.81
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	36.05
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms	P1Y8M
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	500000	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	800000	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	500000	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	530000	shares
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	19600000	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	27100000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	21600000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	29.92
CY2015Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	846000000	USD
CY2016Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	392000000	USD
CY2014	us-gaap	Stock Issued1 StockIssued1	62078000	USD
CY2015	us-gaap	Stock Issued1 StockIssued1	52911000	USD
CY2016	us-gaap	Stock Issued1 StockIssued1	29427000	USD
CY2014	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	204549000	USD
CY2015	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	32523000	USD
CY2016	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	16326000	USD
CY2015Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	3000000	shares
CY2016	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	32209000	USD
CY2016	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	800000	shares
CY2016	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	32200000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	10600920000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	11020849000	USD
CY2013Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9565950000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10214482000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10600920000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11020849000	USD
CY2012	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	15000000	USD
CY2013	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	12000000	USD
CY2014	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	17000000	USD
CY2015	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	5000000	USD
CY2014	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	465836000	USD
CY2015	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	511675000	USD
CY2016	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	532071000	USD
CY2015Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	438189000	USD
CY2016Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	457392000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	41200000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	66500000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	120700000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	133700000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	2000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	4500000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	300000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	6000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2900000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	4700000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	9600000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	300000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	0	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	0	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	28700000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	27100000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	8200000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	16000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	34800000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	9800000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	600000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	300000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	100000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	3400000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1800000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	25800000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	29600000	USD
CY2014	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	1019045000	USD
CY2015	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	1124524000	USD
CY2016	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	1303203000	USD
CY2014	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	2334379000	USD
CY2015	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	2329670000	USD
CY2016	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	2326558000	USD
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	504117000	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	508168000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	509465000	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	503847000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	507768000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	508794000	shares
CY2015Q4	xel	Accrued Unbilled Revenues AccruedUnbilledRevenues	654867000	USD
CY2016Q4	xel	Accrued Unbilled Revenues AccruedUnbilledRevenues	729832000	USD
CY2015Q4	xel	Additional Cash Dividends On Common Stock Which Could Have Been Paid Per First Mortgage Indenture AdditionalCashDividendsOnCommonStockWhichCouldHaveBeenPaidPerFirstMortgageIndenture	1700000000	USD
CY2016Q4	xel	Additional Cash Dividends On Common Stock Which Could Have Been Paid Per First Mortgage Indenture AdditionalCashDividendsOnCommonStockWhichCouldHaveBeenPaidPerFirstMortgageIndenture	1700000000	USD
CY2014	xel	Amortization And Adjustments To Deferred Income Taxes On Income Tax Regulatory Assets And Liabilities AmortizationAndAdjustmentsToDeferredIncomeTaxesOnIncomeTaxRegulatoryAssetsAndLiabilities	-48674000	USD
CY2015	xel	Amortization And Adjustments To Deferred Income Taxes On Income Tax Regulatory Assets And Liabilities AmortizationAndAdjustmentsToDeferredIncomeTaxesOnIncomeTaxRegulatoryAssetsAndLiabilities	-11810000	USD
CY2016	xel	Amortization And Adjustments To Deferred Income Taxes On Income Tax Regulatory Assets And Liabilities AmortizationAndAdjustmentsToDeferredIncomeTaxesOnIncomeTaxRegulatoryAssetsAndLiabilities	-44638000	USD
CY2014	xel	Amortizationof Investment Tax Credits AmortizationofInvestmentTaxCredits	5543000	USD
CY2015	xel	Amortizationof Investment Tax Credits AmortizationofInvestmentTaxCredits	5277000	USD
CY2016	xel	Amortizationof Investment Tax Credits AmortizationofInvestmentTaxCredits	5203000	USD
CY2016	xel	Approvedannualaccrualfordecommissioningcosts Approvedannualaccrualfordecommissioningcosts	14000000	USD
CY2015	xel	Assumed Annual Escalation Rate During Independent Fuel Storage Installation And Site Restoration Portion Of Decommissioning AssumedAnnualEscalationRateDuringIndependentFuelStorageInstallationAndSiteRestorationPortionOfDecommissioning	0.0336
CY2016	xel	Assumed Annual Escalation Rate During Independent Fuel Storage Installation And Site Restoration Portion Of Decommissioning AssumedAnnualEscalationRateDuringIndependentFuelStorageInstallationAndSiteRestorationPortionOfDecommissioning	0.0336
CY2015	xel	Assumed Annual Escalation Rate During Operations And Radiological Portion Of Decommissioning AssumedAnnualEscalationRateDuringOperationsAndRadiologicalPortionOfDecommissioning	0.0436
CY2016	xel	Assumed Annual Escalation Rate During Operations And Radiological Portion Of Decommissioning AssumedAnnualEscalationRateDuringOperationsAndRadiologicalPortionOfDecommissioning	0.0436
CY2014	xel	Bonus Depreciation Extension BonusDepreciationExtension	P1Y
CY2015Q4	xel	Collateral Already Posted Adequate Assurance Clauses Aggregate Fair Value CollateralAlreadyPostedAdequateAssuranceClausesAggregateFairValue	0	USD
CY2016Q4	xel	Collateral Already Posted Adequate Assurance Clauses Aggregate Fair Value CollateralAlreadyPostedAdequateAssuranceClausesAggregateFairValue	0	USD
CY2014	xel	Conservation And Demand Side Management Program Expenses ConservationAndDemandSideManagementProgramExpenses	301772000	USD
CY2015	xel	Conservation And Demand Side Management Program Expenses ConservationAndDemandSideManagementProgramExpenses	224679000	USD
CY2016	xel	Conservation And Demand Side Management Program Expenses ConservationAndDemandSideManagementProgramExpenses	244784000	USD
CY2014Q4	xel	Cumulative Fuel Disposal Assessments Paid To Doe CumulativeFuelDisposalAssessmentsPaidToDoe	452100000	USD
CY2014	xel	Current Change In Unrecognized Tax Expense Benefit CurrentChangeInUnrecognizedTaxExpenseBenefit	23915000	USD
CY2015	xel	Current Change In Unrecognized Tax Expense Benefit CurrentChangeInUnrecognizedTaxExpenseBenefit	45933000	USD
CY2016	xel	Current Change In Unrecognized Tax Expense Benefit CurrentChangeInUnrecognizedTaxExpenseBenefit	5924000	USD
CY2014	xel	Doe Fuel Disposal Assessments Included In Fuel Expense DOEFuelDisposalAssessmentsIncludedInFuelExpense	5000000	USD
CY2016	xel	Doe Fuel Disposal Assessments Included In Fuel Expense DOEFuelDisposalAssessmentsIncludedInFuelExpense	0	USD
CY2014	xel	Deferred Change In Unrecognized Tax Expense Benefit DeferredChangeInUnrecognizedTaxExpenseBenefit	-20645000	USD
CY2015	xel	Deferred Change In Unrecognized Tax Expense Benefit DeferredChangeInUnrecognizedTaxExpenseBenefit	-36342000	USD
CY2016	xel	Deferred Change In Unrecognized Tax Expense Benefit DeferredChangeInUnrecognizedTaxExpenseBenefit	-2097000	USD
CY2014	xel	Deferred Income Tax Expense Benefit Other DeferredIncomeTaxExpenseBenefitOther	1000	USD
CY2015	xel	Deferred Income Tax Expense Benefit Other DeferredIncomeTaxExpenseBenefitOther	1000	USD
CY2016	xel	Deferred Income Tax Expense Benefit Other DeferredIncomeTaxExpenseBenefitOther	-4000	USD
CY2014	xel	Deferred Investment Tax Credits DeferredInvestmentTaxCredits	5543000	USD
CY2015	xel	Deferred Investment Tax Credits DeferredInvestmentTaxCredits	5277000	USD
CY2016	xel	Deferred Investment Tax Credits DeferredInvestmentTaxCredits	5203000	USD
CY2015Q4	xel	Deferred Tax Assets Deferred Investment Tax Credits DeferredTaxAssetsDeferredInvestmentTaxCredits	29650000	USD
CY2016Q4	xel	Deferred Tax Assets Deferred Investment Tax Credits DeferredTaxAssetsDeferredInvestmentTaxCredits	27436000	USD
CY2015Q4	xel	Deferred Tax Assets Environmental Remediation DeferredTaxAssetsEnvironmentalRemediation	38663000	USD
CY2016Q4	xel	Deferred Tax Assets Environmental Remediation DeferredTaxAssetsEnvironmentalRemediation	30288000	USD
CY2015Q4	xel	Deferred Tax Assets Rate Refund DeferredTaxAssetsRateRefund	50441000	USD
CY2016Q4	xel	Deferred Tax Assets Rate Refund DeferredTaxAssetsRateRefund	32810000	USD
CY2015Q4	xel	Deferred Tax Assets Regulatory Liabilities DeferredTaxAssetsRegulatoryLiabilities	36257000	USD
CY2016Q4	xel	Deferred Tax Assets Regulatory Liabilities DeferredTaxAssetsRegulatoryLiabilities	28249000	USD
CY2015Q4	xel	Deferred Tax Assets Tax Credit Carryforward DeferredTaxAssetsTaxCreditCarryforward	404738000	USD
CY2016Q4	xel	Deferred Tax Assets Tax Credit Carryforward DeferredTaxAssetsTaxCreditCarryforward	497518000	USD
CY2015Q4	xel	Deferred Tax Assets Unbilled Revenue Fuel Costs DeferredTaxAssetsUnbilledRevenueFuelCosts	57220000	USD
CY2016Q4	xel	Deferred Tax Assets Unbilled Revenue Fuel Costs DeferredTaxAssetsUnbilledRevenueFuelCosts	11387000	USD
CY2014	xel	Deferred Tax Expense Benefit Excluding Selected Items DeferredTaxExpenseBenefitExcludingSelectedItems	616934000	USD
CY2015	xel	Deferred Tax Expense Benefit Excluding Selected Items DeferredTaxExpenseBenefitExcludingSelectedItems	546664000	USD
CY2016	xel	Deferred Tax Expense Benefit Excluding Selected Items DeferredTaxExpenseBenefitExcludingSelectedItems	630877000	USD
CY2014	xel	Depreciation Expense Expressed As Percentage Of Average Depreciable Property DepreciationExpenseExpressedAsPercentageOfAverageDepreciableProperty	0.027
CY2015	xel	Depreciation Expense Expressed As Percentage Of Average Depreciable Property DepreciationExpenseExpressedAsPercentageOfAverageDepreciableProperty	0.028
CY2016	xel	Depreciation Expense Expressed As Percentage Of Average Depreciable Property DepreciationExpenseExpressedAsPercentageOfAverageDepreciableProperty	0.029
CY2015Q4	xel	Derivative Gross Liability Position Aggregate Fair Value DerivativeGrossLiabilityPositionAggregateFairValue	0	USD
CY2016Q4	xel	Derivative Gross Liability Position Aggregate Fair Value DerivativeGrossLiabilityPositionAggregateFairValue	0	USD
CY2015Q4	xel	Differencesin Discount Rateand Market Risk Premium DifferencesinDiscountRateandMarketRiskPremium	1275438000	USD
CY2016Q4	xel	Differencesin Discount Rateand Market Risk Premium DifferencesinDiscountRateandMarketRiskPremium	1043655000	USD
CY2015Q4	xel	Discounted Decommissioning Cost Obligation DiscountedDecommissioningCostObligation	4314102000	USD
CY2016Q4	xel	Discounted Decommissioning Cost Obligation DiscountedDecommissioningCostObligation	4137132000	USD
CY2015Q4	xel	Discounted Decommissioning Obligation Compared To Assets Currently Held In Trust DiscountedDecommissioningObligationComparedToAssetsCurrentlyHeldInTrust	-2589952000	USD
CY2016Q4	xel	Discounted Decommissioning Obligation Compared To Assets Currently Held In Trust DiscountedDecommissioningObligationComparedToAssetsCurrentlyHeldInTrust	-2276370000	USD
CY2015Q4	xel	Effect Of Discounting Obligation Using Risk Free Interest Rate EffectOfDiscountingObligationUsingRiskFreeInterestRate	6891392000	USD
CY2016Q4	xel	Effect Of Discounting Obligation Using Risk Free Interest Rate EffectOfDiscountingObligationUsingRiskFreeInterestRate	7068362000	USD
CY2015Q4	xel	Effect Of Escalating Costs To Current Year Dollars EffectOfEscalatingCostsToCurrentYearDollars	126464000	USD
CY2016Q4	xel	Effect Of Escalating Costs To Current Year Dollars EffectOfEscalatingCostsToCurrentYearDollars	258278000	USD
CY2015Q4	xel	Effect Of Escalating Costs To Payment Date EffectOfEscalatingCostsToPaymentDate	8066688000	USD
CY2016Q4	xel	Effect Of Escalating Costs To Payment Date EffectOfEscalatingCostsToPaymentDate	7934874000	USD
CY2014	xel	Effective Income Tax Rate Reconciliation Change In Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefits	0.002
CY2015	xel	Effective Income Tax Rate Reconciliation Change In Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefits	0.006
CY2016	xel	Effective Income Tax Rate Reconciliation Change In Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefits	0.002
CY2014	xel	Effective Income Tax Rate Reconciliation Regulatory Differences Utility Plant Items EffectiveIncomeTaxRateReconciliationRegulatoryDifferencesUtilityPlantItems	-0.013
CY2015	xel	Effective Income Tax Rate Reconciliation Regulatory Differences Utility Plant Items EffectiveIncomeTaxRateReconciliationRegulatoryDifferencesUtilityPlantItems	-0.010
CY2016	xel	Effective Income Tax Rate Reconciliation Regulatory Differences Utility Plant Items EffectiveIncomeTaxRateReconciliationRegulatoryDifferencesUtilityPlantItems	-0.005
CY2014	xel	Effective Income Tax Reconciliation Net Operating Loss Carryback EffectiveIncomeTaxReconciliationNetOperatingLossCarryback	-0.009
CY2015	xel	Effective Income Tax Reconciliation Net Operating Loss Carryback EffectiveIncomeTaxReconciliationNetOperatingLossCarryback	-0.003
CY2016	xel	Effective Income Tax Reconciliation Net Operating Loss Carryback EffectiveIncomeTaxReconciliationNetOperatingLossCarryback	0.000
CY2015Q4	xel	Estimated Decommissioning Cost Obligation From Most Recently Approved Study EstimatedDecommissioningCostObligationFromMostRecentlyApprovedStudy	3012342000	USD
CY2016Q4	xel	Estimated Decommissioning Cost Obligation From Most Recently Approved Study EstimatedDecommissioningCostObligationFromMostRecentlyApprovedStudy	3012342000	USD
CY2015Q4	xel	Estimated Decommissioning Cost Obligation In Current Dollars EstimatedDecommissioningCostObligationInCurrentDollars	3138806000	USD
CY2016Q4	xel	Estimated Decommissioning Cost Obligation In Current Dollars EstimatedDecommissioningCostObligationInCurrentDollars	3270620000	USD
CY2015Q4	xel	Estimated Future Decommissioning Costs Undiscounted EstimatedFutureDecommissioningCostsUndiscounted	11205494000	USD
CY2016Q4	xel	Estimated Future Decommissioning Costs Undiscounted EstimatedFutureDecommissioningCostsUndiscounted	11205494000	USD
CY2016	xel	Excise Tax Delay ExciseTaxDelay	P2Y
	xel	Fuel Disposal Fee Charge FuelDisposalFeeCharge	0.001
CY2016	xel	Fuel Disposal Fee Charge FuelDisposalFeeCharge	0
CY2014	xel	Gain Loss On Hedging And Derivative Transactions GainLossOnHedgingAndDerivativeTransactions	-5506000	USD
CY2015	xel	Gain Loss On Hedging And Derivative Transactions GainLossOnHedgingAndDerivativeTransactions	-21919000	USD
CY2016	xel	Gain Loss On Hedging And Derivative Transactions GainLossOnHedgingAndDerivativeTransactions	-7939000	USD
CY2014	xel	Insurance Policy Expense Income Net InsurancePolicyExpenseIncomeNet	6923000	USD
CY2015	xel	Insurance Policy Expense Income Net InsurancePolicyExpenseIncomeNet	3851000	USD
CY2016	xel	Insurance Policy Expense Income Net InsurancePolicyExpenseIncomeNet	3373000	USD
CY2014	xel	Interest Expense Incomerelatedtounrecognizedtaxbenefits InterestExpenseIncomerelatedtounrecognizedtaxbenefits	-300000	USD
CY2015	xel	Interest Expense Incomerelatedtounrecognizedtaxbenefits InterestExpenseIncomerelatedtounrecognizedtaxbenefits	-200000	USD
CY2016	xel	Interest Expense Incomerelatedtounrecognizedtaxbenefits InterestExpenseIncomerelatedtounrecognizedtaxbenefits	3300000	USD
CY2014	xel	Losson Monticello Lcmep Uproject LossonMonticelloLCMEPUproject	0	USD
CY2015	xel	Losson Monticello Lcmep Uproject LossonMonticelloLCMEPUproject	129463000	USD
CY2016	xel	Losson Monticello Lcmep Uproject LossonMonticelloLCMEPUproject	0	USD
CY2014	xel	Matching Contributions Related To401 K Plan MatchingContributionsRelatedTo401KPlan	7400000	USD
CY2016	xel	Maximum Number Of Months Following End Of Annual Period In Which Revenues Are Earned To Be Included In Incentive Programs MaximumNumberOfMonthsFollowingEndOfAnnualPeriodInWhichRevenuesAreEarnedToBeIncludedInIncentivePrograms	P24M
CY2016	xel	Maximum Number Of Months Of Remaining Maturity At Time Of Purchase To Consider Investments In Certain Instruments As Cash Equivalents MaximumNumberOfMonthsOfRemainingMaturityAtTimeOfPurchaseToConsiderInvestmentsInCertainInstrumentsAsCashEquivalents	P3M
CY2016	xel	Minimum Amount Of Time Between Nuclear Decommissioning Studies In Years MinimumAmountOfTimeBetweenNuclearDecommissioningStudiesInYears	P3Y
CY2014	xel	Nuclear Decommissioning Expense NuclearDecommissioningExpense	7138000	USD
CY2015	xel	Nuclear Decommissioning Expense NuclearDecommissioningExpense	6862000	USD
CY2016	xel	Nuclear Decommissioning Expense NuclearDecommissioningExpense	20372000	USD
CY2014	xel	Nuclear Fuel Amortization NuclearFuelAmortization	114542000	USD
CY2015	xel	Nuclear Fuel Amortization NuclearFuelAmortization	106424000	USD
CY2016	xel	Nuclear Fuel Amortization NuclearFuelAmortization	116982000	USD
CY2016	xel	Number Of Employers That Must Be Exceeded During Given Period In Order For Certain Union Workers To Participate In Multiemployer Plans NumberOfEmployersThatMustBeExceededDuringGivenPeriodInOrderForCertainUnionWorkersToParticipateInMultiemployerPlans	1	Employer
CY2016	xel	Number Of Leases Qualifying As Capital Leases NumberOfLeasesQualifyingAsCapitalLeases	3	Lease
CY2016	xel	Number Of Years Approved For Use In Decommissioning Scenario In Years NumberOfYearsApprovedForUseInDecommissioningScenarioInYears	P60Y
CY2016	xel	Number Of Years Of Tax Loss Carryback Period NumberOfYearsOfTaxLossCarrybackPeriod	two
CY2016	xel	Numberof Utilitiesin Peer Group NumberofUtilitiesinPeerGroup	22	Parties
CY2016	xel	Operating Lease Purchase Power Agreement Expiration OperatingLeasePurchasePowerAgreementExpiration	2039
CY2015Q4	xel	Operatingand Maintenance Costs Not Includedfor Gaap OperatingandMaintenanceCostsNotIncludedforGAAP	897640000	USD
CY2016Q4	xel	Operatingand Maintenance Costs Not Includedfor Gaap OperatingandMaintenanceCostsNotIncludedforGAAP	844155000	USD
CY2015Q4	xel	Other Assets Excluding Property Plant And Equipment OtherAssetsExcludingPropertyPlantAndEquipment	4845400000	USD
CY2016Q4	xel	Other Assets Excluding Property Plant And Equipment OtherAssetsExcludingPropertyPlantAndEquipment	5471446000	USD
CY2016Q4	xel	Percent Of Employees Receiving Benefits Who Are Represented By Local Labor Unions Under Collective Bargaining Agreements PercentOfEmployeesReceivingBenefitsWhoAreRepresentedByLocalLaborUnionsUnderCollectiveBargainingAgreements	0.47
CY2016Q4	xel	Percentage Of Total Obligation For Decommissioning Expected To Be Funded By External Funds PercentageOfTotalObligationForDecommissioningExpectedToBeFundedByExternalFunds	1
CY2014	xel	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Debt PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfDebt	38402000	USD
CY2015	xel	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Debt PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfDebt	26248000	USD
CY2016	xel	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Debt PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfDebt	27028000	USD
CY2016	xel	Purchase Power Agreement Duration Maximum PurchasePowerAgreementDurationMaximum	2039
CY2016	xel	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Dividend Equivalent In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalentInPeriodWeightedAverageGrantDateFairValue	33.64
CY2016	xel	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Dividend Equivalents In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalentsInPeriod	47000	shares
CY2016	xel	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Non Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonVestedInPeriodTotalFairValue	40000000	USD
CY2015Q4	xel	Tax Benefits Associated With Nol And Tax Credit Carryforwards TaxBenefitsAssociatedWithNolAndTaxCreditCarryforwards	36700000	USD
CY2016Q4	xel	Tax Benefits Associated With Nol And Tax Credit Carryforwards TaxBenefitsAssociatedWithNolAndTaxCreditCarryforwards	43800000	USD
CY2015Q4	xel	Unrecognized Tax Benefits That Would Not Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldNotImpactEffectiveTaxRate	94900000	USD
CY2016Q4	xel	Unrecognized Tax Benefits That Would Not Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldNotImpactEffectiveTaxRate	104100000	USD
CY2016	xel	Vie Purchase Power Agreement Expiration VIEPurchasePowerAgreementExpiration	2041
CY2016	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Guarantees —</font><font style="font-family:inherit;font-size:10pt;"> Xcel Energy recognizes, upon issuance or modification of a guarantee, a liability for the fair market value of the obligation that has been assumed in issuing the guarantee. This liability includes consideration of specific triggering events and other conditions which may modify the ongoing obligation to perform under the guarantee.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The obligation recognized is reduced over the term of the guarantee as Xcel Energy is released from risk under the guarantee. See Note 13 for specific details of issued guarantees.</font></div></div>
CY2016	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Reclassifications</font><font style="font-family:inherit;font-size:10pt;"> </font><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">—</font><font style="font-family:inherit;font-size:10pt;"> Due to adoption of new accounting pronouncements, certain previously reported amounts have been reclassified to conform to the current year presentation. See Note 2 for further discussion of recently adopted accounting pronouncements. </font></div></div>
CY2016	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates —</font><font style="font-family:inherit;font-size:10pt;"> In recording transactions and balances resulting from business operations, Xcel Energy uses estimates based on the best information available. Estimates are used for such items as plant depreciable lives or potential disallowances, AROs, certain regulatory assets and liabilities, tax provisions, uncollectible amounts, environmental costs, unbilled revenues, jurisdictional fuel and energy cost allocations and actuarially determined benefit costs. The recorded estimates are revised when better information becomes available or when actual amounts can be determined. Those revisions can affect operating results.</font></div></div>
CY2016	xel	Reconciliationof Decommissioning Cost Obligation Regulatoryto Gaap ReconciliationofDecommissioningCostObligationRegulatorytoGAAP	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Calculations and data used by the regulator in approving NSP-Minnesota’s rates are useful in assessing future cash flows. The regulatory basis information is a means to reconcile amounts previously provided to the MPUC and utilized for regulatory purposes to amounts used for financial reporting. The following table provides a reconciliation of the discounted decommissioning cost obligation - regulated basis to the ARO recorded in accordance with GAAP:</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="9" rowspan="1"></td></tr><tr><td style="width:76%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:9%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:9%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">(Thousands of Dollars)</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">2016</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">2015</font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Discounted decommissioning cost obligation - regulated basis</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4,137,132</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4,314,102</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Differences in discount rate and market risk premium</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(1,043,655</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">)</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(1,275,438</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">)</font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">O&M costs not included for GAAP</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(844,155</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">)</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(897,640</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">)</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Nuclear production decommissioning ARO - GAAP</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2,249,322</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2,141,024</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div></div></div>

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2016 Q4 Form 10-K Financial Statement

#000007290317000008 Filed on February 24, 2017

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$XEL XCEL ENERGY INC Stock $xel

2016 Q4 Form 10-K Financial Statement

#000007290317000008 Filed on February 24, 2017

Income Statement

Balance Sheet

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$XEL
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