☒ | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
Commission File Number | Name of Registrant, State of Incorporation, Address of Principal Executive Offices and Telephone Number | IRS Employer Identification Number | ||
1-9894 | ALLIANT ENERGY CORPORATION | 39-1380265 | ||
(a Wisconsin corporation) | ||||
4902 N. Biltmore Lane | ||||
Madison, Wisconsin 53718 | ||||
Telephone (608) 458-3311 | ||||
1-4117 | INTERSTATE POWER AND LIGHT COMPANY | 42-0331370 | ||
(an Iowa corporation) | ||||
Alliant Energy Tower | ||||
Cedar Rapids, Iowa 52401 | ||||
Telephone (319) 786-4411 | ||||
0-337 | WISCONSIN POWER AND LIGHT COMPANY | 39-0714890 | ||
(a Wisconsin corporation) | ||||
4902 N. Biltmore Lane | ||||
Madison, Wisconsin 53718 | ||||
Telephone (608) 458-3311 |
Large Accelerated Filer | Accelerated Filer | Non-accelerated Filer | Smaller Reporting Company Filer | ||||
Alliant Energy Corporation | ☒ | ||||||
Interstate Power and Light Company | ☒ | ||||||
Wisconsin Power and Light Company | ☒ |
Alliant Energy Corporation | Common stock, $0.01 par value, 227,500,428 shares outstanding |
Interstate Power and Light Company | Common stock, $2.50 par value, 13,370,788 shares outstanding (all of which are owned beneficially and of record by Alliant Energy Corporation) |
Wisconsin Power and Light Company | Common stock, $5 par value, 13,236,601 shares outstanding (all of which are owned beneficially and of record by Alliant Energy Corporation) |
Page | |
Alliant Energy Corporation: | |
Interstate Power and Light Company: | |
Wisconsin Power and Light Company: | |
Abbreviation or Acronym | Definition | |
2015 Form 10-K | Combined Annual Report on Form 10-K filed by Alliant Energy, IPL and WPL for the year ended Dec. 31, 2015 | |
AEF | Alliant Energy Finance, LLC | |
AFUDC | Allowance for funds used during construction | |
Alliant Energy | Alliant Energy Corporation | |
AROs | Asset retirement obligations | |
ATC | American Transmission Company LLC | |
CAA | Clean Air Act | |
CCR | Coal Combustion Residuals | |
CDD | Cooling degree days | |
CEO | Chief Executive Officer | |
CFO | Chief Financial Officer | |
Columbia | Columbia Energy Center | |
Corporate Services | Alliant Energy Corporate Services, Inc. | |
CRANDIC | Cedar Rapids and Iowa City Railway Company | |
DAEC | Duane Arnold Energy Center | |
Dth | Dekatherm | |
Edgewater | Edgewater Generating Station | |
EGU | Electric generating unit | |
EPA | U.S. Environmental Protection Agency | |
EPS | Earnings per weighted average common share | |
FERC | Federal Energy Regulatory Commission | |
Financial Statements | Condensed Consolidated Financial Statements | |
FTR | Financial transmission right | |
Fuel-related | Electric production fuel and purchased power | |
GAAP | U.S. generally accepted accounting principles | |
HDD | Heating degree days | |
IPL | Interstate Power and Light Company | |
ITC | ITC Midwest LLC | |
IUB | Iowa Utilities Board | |
Marshalltown | Marshalltown Generating Station | |
MDA | Management’s Discussion and Analysis of Financial Condition and Results of Operations | |
MGP | Manufactured gas plant | |
MISO | Midcontinent Independent System Operator, Inc. | |
MW | Megawatt | |
MWh | Megawatt-hour | |
N/A | Not applicable | |
NAAQS | National Ambient Air Quality Standards | |
Nelson Dewey | Nelson Dewey Generating Station | |
Note(s) | Combined Notes to Condensed Consolidated Financial Statements | |
NOx | Nitrogen oxide | |
OPEB | Other postretirement benefits | |
PSCW | Public Service Commission of Wisconsin | |
Receivables Agreement | Receivables Purchase and Sale Agreement | |
Resources | Alliant Energy Resources, LLC | |
Riverside | Riverside Energy Center | |
RMT | RMT, Inc. | |
SCR | Selective catalytic reduction | |
SO2 | Sulfur dioxide | |
U.S. | United States of America | |
Whiting Petroleum | Whiting Petroleum Corporation | |
WPL | Wisconsin Power and Light Company |
1 |
• | federal and state regulatory or governmental actions, including the impact of energy, tax, financial and health care legislation, and of regulatory agency orders; |
• | IPL’s and WPL’s ability to obtain adequate and timely rate relief to allow for, among other things, the recovery of fuel costs, operating costs, transmission costs, deferred expenditures, capital expenditures, and remaining costs related to EGUs that may be permanently closed, earning their authorized rates of return, and the payments to their parent of expected levels of dividends; |
• | the ability to continue cost controls and operational efficiencies; |
• | the impact of IPL’s retail electric base rate freeze in Iowa during 2016; |
• | the impacts of WPL’s retail electric and gas base rate freeze in Wisconsin during 2016 and WPL’s pending retail base rate case for the 2017/2018 Test Period; |
• | weather effects on results of utility operations, including impacts of temperature changes in IPL’s and WPL’s service territories on customers’ demand for electricity and gas; |
• | the impact of the economy in IPL’s and WPL’s service territories and the resulting impacts on sales volumes, margins and the ability to collect unpaid bills; |
• | the impact of customer- and third party-owned generation, including alternative electric suppliers, in IPL’s and WPL’s service territories on system reliability, operating expenses and customers’ demand for electricity; |
• | the impact of energy efficiency, franchise retention, customer- and third party-owned generation and customer disconnects on sales volumes and margins; |
• | the impact that price changes may have on IPL’s and WPL’s customers’ demand for electric, gas and steam services and their ability to pay their bills; |
• | developments that adversely impact the ability to implement the strategic plan, including issues with planned and potential new wind generation projects, IPL’s Marshalltown EGU, WPL’s Riverside expansion and related third party purchase options, new environmental control equipment for various fossil-fueled EGUs of IPL and WPL, various replacements, modernization and expansion of IPL’s and WPL’s electric and gas distribution systems, the proposed transfer of the Franklin County wind farm to IPL, and the potential decommissioning of certain EGUs of IPL and WPL; |
• | the ability to qualify for the full level of production tax credits on planned and potential new wind farms and the impact of changes to production tax credits for wind farms; |
• | issues related to the availability and operations of EGUs, including start-up risks, breakdown or failure of equipment, performance below expected or contracted levels of output or efficiency, operator error, employee safety, transmission constraints, compliance with mandatory reliability standards and risks related to recovery of resulting incremental costs through rates; |
• | disruptions in the supply and delivery of natural gas, purchased electricity and coal, including due to the bankruptcy of coal mining companies; |
• | changes in the price of delivered coal, natural gas and purchased electricity due to shifts in supply and demand caused by market conditions and regulations, and the ability to recover and to retain the recovery of related changes in purchased power, fuel and fuel-related costs through rates in a timely manner; |
• | impacts on equity income from unconsolidated investments due to further potential changes to ATC’s authorized return on equity; |
• | issues associated with environmental remediation and environmental compliance, including compliance with the Consent Decree between WPL, the EPA and the Sierra Club, the Consent Decree between IPL, the EPA, the Sierra Club, the State of Iowa and Linn County in Iowa, the CCR Rule, the Clean Power Plan, future changes in environmental laws and regulations, including the EPA’s regulations for carbon dioxide emissions reductions from new and existing fossil-fueled EGUs, and litigation associated with environmental requirements; |
• | the ability to defend against environmental claims brought by state and federal agencies, such as the EPA, state natural resources agencies or third parties, such as the Sierra Club, and the impact on operating expenses of defending and resolving such claims; |
2 |
• | the ability to recover through rates all environmental compliance and remediation costs, including costs for projects put on hold due to uncertainty of future environmental laws and regulations; |
• | impacts that storms or natural disasters in IPL’s and WPL’s service territories may have on their operations and recovery of, and rate relief for, costs associated with restoration activities; |
• | the direct or indirect effects resulting from terrorist incidents, including physical attacks and cyber attacks, or responses to such incidents; |
• | the impact of penalties or third-party claims related to, or in connection with, a failure to maintain the security of personally identifiable information, including associated costs to notify affected persons and to mitigate their information security concerns; |
• | the direct or indirect effects resulting from breakdown or failure of equipment in the operation of gas distribution systems, such as leaks, explosions and mechanical problems, and compliance with gas transmission and distribution safety regulations, such as proposed rules recently issued by the Pipeline and Hazardous Materials Safety Administration; |
• | risks associated with integration of a new customer billing and information system, which was completed in the first quarter of 2016; |
• | impacts of IPL’s future tax benefits from Iowa rate-making practices, including deductions for repairs expenditures and allocation of mixed service costs, and recoverability of the associated regulatory assets from customers, when the differences reverse in future periods; |
• | any material post-closing adjustments related to any past asset divestitures, including the sales of IPL’s Minnesota electric and natural gas assets, RMT and Whiting Petroleum, which could result from, among other things, warranties, parental guarantees or litigation; |
• | continued access to the capital markets on competitive terms and rates, and the actions of credit rating agencies; |
• | inflation and interest rates; |
• | changes to the creditworthiness of counterparties with which Alliant Energy, IPL and WPL have contractual arrangements, including participants in the energy markets and fuel suppliers and transporters; |
• | issues related to electric transmission, including operating in Regional Transmission Organization energy and ancillary services markets, the impacts of potential future billing adjustments and cost allocation changes from Regional Transmission Organizations and recovery of costs incurred; |
• | current or future litigation, regulatory investigations, proceedings or inquiries; |
• | reputational damage from negative publicity, protests, fines, penalties and other negative consequences resulting in regulatory and/or legal actions; |
• | Alliant Energy’s ability to sustain its dividend payout ratio goal; |
• | employee workforce factors, including changes in key executives, collective bargaining agreements and negotiations, work stoppages or restructurings; |
• | inability to access technological developments, including those related to wind turbines, solar generation, smart technology, battery storage and other future technologies; |
• | changes in technology that alter the channels through which electric customers buy or utilize power; |
• | impacts of ATC’s potential restructuring; |
• | material changes in retirement and benefit plan costs; |
• | the impact of performance-based compensation plans accruals; |
• | the effect of accounting standards issued periodically by standard-setting bodies, including revenue recognition and lease standards; |
• | the impact of adjustments made to deferred tax assets and liabilities from state apportionment assumptions; |
• | the ability to utilize tax credits and net operating losses generated to date, and those that may be generated in the future, before they expire; |
• | impacts of the extension of bonus depreciation deductions; |
• | the ability to successfully complete tax audits and changes in tax accounting methods with no material impact on earnings and cash flows; and |
• | factors listed in MDA and Risk Factors in Item 1A in the 2015 Form 10-K. |
3 |
For the Three Months | For the Nine Months | ||||||||||||||
Ended September 30, | Ended September 30, | ||||||||||||||
2016 | 2015 | 2016 | 2015 | ||||||||||||
(in millions, except per share amounts) | |||||||||||||||
Operating revenues: | |||||||||||||||
Electric utility | $864.3 | $835.8 | $2,209.1 | $2,147.5 | |||||||||||
Gas utility | 39.5 | 38.0 | 248.7 | 288.1 | |||||||||||
Other utility | 9.4 | 13.4 | 35.0 | 44.6 | |||||||||||
Non-regulated | 11.4 | 11.7 | 30.2 | 33.3 | |||||||||||
Total operating revenues | 924.6 | 898.9 | 2,523.0 | 2,513.5 | |||||||||||
Operating expenses: | |||||||||||||||
Electric production fuel and purchased power | 245.9 | 245.8 | 646.3 | 646.9 | |||||||||||
Electric transmission service | 138.6 | 127.6 | 396.8 | 367.7 | |||||||||||
Cost of gas sold | 12.5 | 13.6 | 132.3 | 166.3 | |||||||||||
Asset valuation charges for Franklin County wind farm | 86.4 | — | 86.4 | — | |||||||||||
Other operation and maintenance | 148.6 | 151.1 | 438.2 | 456.3 | |||||||||||
Depreciation and amortization | 104.1 | 99.3 | 308.7 | 299.9 | |||||||||||
Taxes other than income taxes | 25.9 | 25.6 | 77.2 | 78.6 | |||||||||||
Total operating expenses | 762.0 | 663.0 | 2,085.9 | 2,015.7 | |||||||||||
Operating income | 162.6 | 235.9 | 437.1 | 497.8 | |||||||||||
Interest expense and other: | |||||||||||||||
Interest expense | 48.8 | 46.4 | 144.8 | 139.5 | |||||||||||
Equity income from unconsolidated investments, net | (9.2 | ) | (11.1 | ) | (28.8 | ) | (28.9 | ) | |||||||
Allowance for funds used during construction | (15.8 | ) | (9.7 | ) | (44.3 | ) | (25.1 | ) | |||||||
Interest income and other | (0.1 | ) | (0.1 | ) | (0.3 | ) | (0.4 | ) | |||||||
Total interest expense and other | 23.7 | 25.5 | 71.4 | 85.1 | |||||||||||
Income from continuing operations before income taxes | 138.9 | 210.4 | 365.7 | 412.7 | |||||||||||
Income taxes | 7.5 | 27.8 | 47.2 | 59.5 | |||||||||||
Income from continuing operations, net of tax | 131.4 | 182.6 | 318.5 | 353.2 | |||||||||||
Loss from discontinued operations, net of tax | (0.4 | ) | (0.1 | ) | (2.0 | ) | (1.4 | ) | |||||||
Net income | 131.0 | 182.5 | 316.5 | 351.8 | |||||||||||
Preferred dividend requirements of Interstate Power and Light Company | 2.6 | 2.6 | 7.7 | 7.7 | |||||||||||
Net income attributable to Alliant Energy common shareowners | $128.4 | $179.9 | $308.8 | $344.1 | |||||||||||
Weighted average number of common shares outstanding (basic and diluted) (a) | 227.2 | 226.4 | 227.0 | 225.0 | |||||||||||
Earnings per weighted average common share attributable to Alliant Energy common shareowners (basic and diluted) (a): | |||||||||||||||
Income from continuing operations, net of tax | $0.57 | $0.79 | $1.37 | $1.54 | |||||||||||
Loss from discontinued operations, net of tax | — | — | (0.01 | ) | (0.01 | ) | |||||||||
Net income | $0.57 | $0.79 | $1.36 | $1.53 | |||||||||||
Amounts attributable to Alliant Energy common shareowners: | |||||||||||||||
Income from continuing operations, net of tax | $128.8 | $180.0 | $310.8 | $345.5 | |||||||||||
Loss from discontinued operations, net of tax | (0.4 | ) | (0.1 | ) | (2.0 | ) | (1.4 | ) | |||||||
Net income | $128.4 | $179.9 | $308.8 | $344.1 | |||||||||||
Dividends declared per common share (a) | $0.29375 | $0.275 | $0.88125 | $0.825 |
(a) | Amounts reflect the effects of a two-for-one common stock split distributed in May 2016. Refer to Note 6 for additional details. |
4 |
September 30, 2016 | December 31, 2015 | ||||||
(in millions, except per share and share amounts) | |||||||
ASSETS | |||||||
Current assets: | |||||||
Cash and cash equivalents | $84.7 | $5.8 | |||||
Accounts receivable, less allowance for doubtful accounts | 491.5 | 397.6 | |||||
Production fuel, at weighted average cost | 92.6 | 98.8 | |||||
Gas stored underground, at weighted average cost | 37.8 | 43.3 | |||||
Materials and supplies, at weighted average cost | 89.5 | 81.4 | |||||
Regulatory assets | 63.1 | 120.2 | |||||
Other | 98.9 | 79.7 | |||||
Total current assets | 958.1 | 826.8 | |||||
Property, plant and equipment, net | 9,920.4 | 9,519.1 | |||||
Investments: | |||||||
Investment in American Transmission Company LLC | 309.9 | 293.3 | |||||
Other | 19.7 | 53.0 | |||||
Total investments | 329.6 | 346.3 | |||||
Other assets: | |||||||
Regulatory assets | 1,811.7 | 1,788.4 | |||||
Deferred charges and other | 9.4 | 14.6 | |||||
Total other assets | 1,821.1 | 1,803.0 | |||||
Total assets | $13,029.2 | $12,495.2 |
LIABILITIES AND EQUITY | |||||||
Current liabilities: | |||||||
Current maturities of long-term debt | $314.0 | $313.4 | |||||
Commercial paper | 238.3 | 159.8 | |||||
Accounts payable | 365.1 | 402.4 | |||||
Regulatory liabilities | 178.4 | 187.1 | |||||
Other | 273.9 | 296.6 | |||||
Total current liabilities | 1,369.7 | 1,359.3 | |||||
Long-term debt, net (excluding current portion) | 3,816.9 | 3,522.2 | |||||
Other liabilities: | |||||||
Deferred tax liabilities | 2,530.6 | 2,381.2 | |||||
Regulatory liabilities | 497.4 | 550.6 | |||||
Pension and other benefit obligations | 455.3 | 451.8 | |||||
Other | 300.2 | 306.0 | |||||
Total other liabilities | 3,783.5 | 3,689.6 | |||||
Commitments and contingencies (Note 13) | |||||||
Equity: | |||||||
Alliant Energy Corporation common equity: | |||||||
Common stock - $0.01 par value - 480,000,000 shares authorized; 227,500,428 and 226,918,432 shares outstanding (a) | 2.3 | 2.3 | |||||
Additional paid-in capital | 1,686.0 | 1,661.8 | |||||
Retained earnings | 2,181.0 | 2,068.9 | |||||
Accumulated other comprehensive loss | (0.4 | ) | (0.4 | ) | |||
Shares in deferred compensation trust - 432,619 and 430,186 shares at a weighted average cost of $22.54 and $19.84 per share (a) | (9.8 | ) | (8.5 | ) | |||
Total Alliant Energy Corporation common equity | 3,859.1 | 3,724.1 | |||||
Cumulative preferred stock of Interstate Power and Light Company | 200.0 | 200.0 | |||||
Total equity | 4,059.1 | 3,924.1 | |||||
Total liabilities and equity | $13,029.2 | $12,495.2 |
(a) | Share and per share amounts reflect the effects of a two-for-one common stock split distributed in May 2016. Refer to Note 6 for additional details. |
5 |
For the Nine Months | |||||||
Ended September 30, | |||||||
2016 | 2015 | ||||||
(in millions) | |||||||
Cash flows from operating activities: | |||||||
Net income | $316.5 | $351.8 | |||||
Adjustments to reconcile net income to net cash flows from operating activities: | |||||||
Depreciation and amortization | 308.7 | 299.9 | |||||
Deferred tax expense and investment tax credits | 76.7 | 101.0 | |||||
Asset valuation charges for Franklin County wind farm | 86.4 | — | |||||
Other | (44.0 | ) | (2.5 | ) | |||
Other changes in assets and liabilities: | |||||||
Accounts receivable | (101.0 | ) | 11.7 | ||||
Sales of accounts receivable | (4.0 | ) | (21.0 | ) | |||
Regulatory assets | 36.6 | (51.3 | ) | ||||
Regulatory liabilities | (66.5 | ) | (61.5 | ) | |||
Deferred income taxes | 71.8 | 74.1 | |||||
Other | (27.2 | ) | (6.9 | ) | |||
Net cash flows from operating activities | 654.0 | 695.3 | |||||
Cash flows used for investing activities: | |||||||
Construction and acquisition expenditures: | |||||||
Utility business | (743.6 | ) | (678.9 | ) | |||
Alliant Energy Corporate Services, Inc. and non-regulated businesses | (43.3 | ) | (47.5 | ) | |||
Proceeds from Minnesota electric and natural gas distribution asset sales | — | 138.1 | |||||
Other | 15.1 | (24.7 | ) | ||||
Net cash flows used for investing activities | (771.8 | ) | (613.0 | ) | |||
Cash flows from financing activities: | |||||||
Common stock dividends | (199.8 | ) | (185.1 | ) | |||
Proceeds from issuance of common stock, net | 20.4 | 145.4 | |||||
Proceeds from issuance of long-term debt | 300.0 | 250.7 | |||||
Payments to retire long-term debt | (1.9 | ) | (182.0 | ) | |||
Net change in commercial paper | 78.5 | (32.2 | ) | ||||
Other | (0.5 | ) | 3.2 | ||||
Net cash flows from financing activities | 196.7 | — | |||||
Net increase in cash and cash equivalents | 78.9 | 82.3 | |||||
Cash and cash equivalents at beginning of period | 5.8 | 56.9 | |||||
Cash and cash equivalents at end of period | $84.7 | $139.2 | |||||
Supplemental cash flows information: | |||||||
Cash (paid) refunded during the period for: | |||||||
Interest, net of capitalized interest | ($140.7 | ) | ($133.9 | ) | |||
Income taxes, net | ($8.3 | ) | $— | ||||
Significant non-cash investing and financing activities: | |||||||
Accrued capital expenditures | $99.9 | $180.0 |
6 |
For the Three Months | For the Nine Months | ||||||||||||||
Ended September 30, | Ended September 30, | ||||||||||||||
2016 | 2015 | 2016 | 2015 | ||||||||||||
(in millions) | |||||||||||||||
Operating revenues: | |||||||||||||||
Electric utility | $483.2 | $468.6 | $1,209.2 | $1,170.6 | |||||||||||
Gas utility | 23.9 | 23.1 | 142.6 | 164.1 | |||||||||||
Steam and other | 9.1 | 12.9 | 34.1 | 41.1 | |||||||||||
Total operating revenues | 516.2 | 504.6 | 1,385.9 | 1,375.8 | |||||||||||
Operating expenses: | |||||||||||||||
Electric production fuel and purchased power | 125.0 | 131.4 | 324.8 | 332.0 | |||||||||||
Electric transmission service | 95.9 | 87.5 | 270.7 | 249.3 | |||||||||||
Cost of gas sold | 8.0 | 9.4 | 76.3 | 93.4 | |||||||||||
Other operation and maintenance | 94.8 | 94.3 | 279.8 | 287.5 | |||||||||||
Depreciation and amortization | 52.7 | 51.2 | 157.8 | 155.1 | |||||||||||
Taxes other than income taxes | 13.9 | 13.8 | 40.6 | 42.2 | |||||||||||
Total operating expenses | 390.3 | 387.6 | 1,150.0 | 1,159.5 | |||||||||||
Operating income | 125.9 | 117.0 | 235.9 | 216.3 | |||||||||||
Interest expense and other: | |||||||||||||||
Interest expense | 25.5 | 23.8 | 75.4 | 71.8 | |||||||||||
Allowance for funds used during construction | (13.8 | ) | (7.3 | ) | (36.2 | ) | (19.3 | ) | |||||||
Interest income and other | — | 0.1 | (0.1 | ) | — | ||||||||||
Total interest expense and other | 11.7 | 16.6 | 39.1 | 52.5 | |||||||||||
Income before income taxes | 114.2 | 100.4 | 196.8 | 163.8 | |||||||||||
Income tax benefit | (2.5 | ) | (18.7 | ) | (2.5 | ) | (24.4 | ) | |||||||
Net income | 116.7 | 119.1 | 199.3 | 188.2 | |||||||||||
Preferred dividend requirements | 2.6 | 2.6 | 7.7 | 7.7 | |||||||||||
Earnings available for common stock | $114.1 | $116.5 | $191.6 | $180.5 |
7 |
September 30, 2016 | December 31, 2015 | ||||||
(in millions, except per share and share amounts) | |||||||
ASSETS | |||||||
Current assets: | |||||||
Cash and cash equivalents | $77.7 | $4.5 | |||||
Accounts receivable, less allowance for doubtful accounts | 266.8 | 200.0 | |||||
Production fuel, at weighted average cost | 70.0 | 60.2 | |||||
Gas stored underground, at weighted average cost | 17.4 | 18.2 | |||||
Materials and supplies, at weighted average cost | 50.0 | 45.7 | |||||
Regulatory assets | 15.0 | 39.6 | |||||
Other | 37.2 | 28.2 | |||||
Total current assets | 534.1 | 396.4 | |||||
Property, plant and equipment, net | 5,220.1 | 4,925.1 | |||||
Investments | 0.8 | 19.6 | |||||
Other assets: | |||||||
Regulatory assets | 1,402.2 | 1,363.0 | |||||
Deferred charges and other | 3.8 | 5.0 | |||||
Total other assets | 1,406.0 | 1,368.0 | |||||
Total assets | $7,161.0 | $6,709.1 |
LIABILITIES AND EQUITY | |||||||
Current liabilities: | |||||||
Accounts payable | $172.6 | $197.2 | |||||
Accounts payable to associated companies | 55.0 | 37.7 | |||||
Regulatory liabilities | 132.5 | 130.9 | |||||
Accrued taxes | 41.2 | 67.6 | |||||
Other | 85.9 | 97.7 | |||||
Total current liabilities | 487.2 | 531.1 | |||||
Long-term debt, net (excluding current portion) | 2,153.1 | 1,856.9 | |||||
Other liabilities: | |||||||
Deferred tax liabilities | 1,493.6 | 1,378.0 | |||||
Regulatory liabilities | 298.9 | 358.3 | |||||
Pension and other benefit obligations | 161.2 | 160.2 | |||||
Other | 229.1 | 229.3 | |||||
Total other liabilities | 2,182.8 | 2,125.8 | |||||
Commitments and contingencies (Note 13) | |||||||
Equity: | |||||||
Interstate Power and Light Company common equity: | |||||||
Common stock - $2.50 par value - 24,000,000 shares authorized; 13,370,788 shares outstanding | 33.4 | 33.4 | |||||
Additional paid-in capital | 1,472.8 | 1,407.8 | |||||
Retained earnings | 631.7 | 554.1 | |||||
Total Interstate Power and Light Company common equity | 2,137.9 | 1,995.3 | |||||
Cumulative preferred stock | 200.0 | 200.0 | |||||
Total equity | 2,337.9 | 2,195.3 | |||||
Total liabilities and equity | $7,161.0 | $6,709.1 |
8 |
For the Nine Months | |||||||
Ended September 30, | |||||||
2016 | 2015 | ||||||
(in millions) | |||||||
Cash flows from operating activities: | |||||||
Net income | $199.3 | $188.2 | |||||
Adjustments to reconcile net income to net cash flows from operating activities: | |||||||
Depreciation and amortization | 157.8 | 155.1 | |||||
Other | 24.3 | 32.3 | |||||
Other changes in assets and liabilities: | |||||||
Accounts receivable | (66.5 | ) | (8.3 | ) | |||
Sales of accounts receivable | (4.0 | ) | (21.0 | ) | |||
Regulatory assets | (14.1 | ) | (38.1 | ) | |||
Regulatory liabilities | (64.5 | ) | (63.1 | ) | |||
Deferred income taxes | 67.7 | 72.0 | |||||
Other | (43.5 | ) | 0.9 | ||||
Net cash flows from operating activities | 256.5 | 318.0 | |||||
Cash flows used for investing activities: | |||||||
Utility construction and acquisition expenditures | (436.5 | ) | (432.6 | ) | |||
Proceeds from Minnesota electric and natural gas distribution asset sales | — | 138.1 | |||||
Other | 1.1 | (24.9 | ) | ||||
Net cash flows used for investing activities | (435.4 | ) | (319.4 | ) | |||
Cash flows from financing activities: | |||||||
Common stock dividends | (114.0 | ) | (105.0 | ) | |||
Capital contributions from parent | 65.0 | 100.0 | |||||
Proceeds from issuance of long-term debt | 300.0 | 250.0 | |||||
Payments to retire long-term debt | — | (150.0 | ) | ||||
Other | 1.1 | 0.5 | |||||
Net cash flows from financing activities | 252.1 | 95.5 | |||||
Net increase in cash and cash equivalents | 73.2 | 94.1 | |||||
Cash and cash equivalents at beginning of period | 4.5 | 5.3 | |||||
Cash and cash equivalents at end of period | $77.7 | $99.4 | |||||
Supplemental cash flows information: | |||||||
Cash (paid) refunded during the period for: | |||||||
Interest | ($72.5 | ) | ($66.7 | ) | |||
Income taxes, net | $0.7 | $31.1 | |||||
Significant non-cash investing and financing activities: | |||||||
Accrued capital expenditures | $44.5 | $115.5 |
9 |
For the Three Months | For the Nine Months | ||||||||||||||
Ended September 30, | Ended September 30, | ||||||||||||||
2016 | 2015 | 2016 | 2015 | ||||||||||||
(in millions) | |||||||||||||||
Operating revenues: | |||||||||||||||
Electric utility | $381.1 | $367.2 | $999.9 | $976.9 | |||||||||||
Gas utility | 15.6 | 14.9 | 106.1 | 124.0 | |||||||||||
Other | 0.3 | 0.5 | 0.9 | 3.5 | |||||||||||
Total operating revenues | 397.0 | 382.6 | 1,106.9 | 1,104.4 | |||||||||||
Operating expenses: | |||||||||||||||
Electric production fuel and purchased power | 120.9 | 114.4 | 321.5 | 314.9 | |||||||||||
Electric transmission service | 42.7 | 40.1 | 126.1 | 118.4 | |||||||||||
Cost of gas sold | 4.5 | 4.2 | 56.0 | 72.9 | |||||||||||
Other operation and maintenance | 54.2 | 57.0 | 157.2 | 167.7 | |||||||||||
Depreciation and amortization | 48.7 | 45.7 | 143.5 | 137.5 | |||||||||||
Taxes other than income taxes | 11.0 | 10.9 | 33.8 | 33.6 | |||||||||||
Total operating expenses | 282.0 | 272.3 | 838.1 | 845.0 | |||||||||||
Operating income | 115.0 | 110.3 | 268.8 | 259.4 | |||||||||||
Interest expense and other: | |||||||||||||||
Interest expense | 22.9 | 23.1 | 68.7 | 69.5 | |||||||||||
Equity income from unconsolidated investments | (9.3 | ) | (11.1 | ) | (29.0 | ) | (30.2 | ) | |||||||
Allowance for funds used during construction | (2.0 | ) | (2.4 | ) | (8.1 | ) | (5.8 | ) | |||||||
Interest income and other | 0.1 | (0.3 | ) | (0.2 | ) | (0.3 | ) | ||||||||
Total interest expense and other | 11.7 | 9.3 | 31.4 | 33.2 | |||||||||||
Income before income taxes | 103.3 | 101.0 | 237.4 | 226.2 | |||||||||||
Income taxes | 33.7 | 32.6 | 77.1 | 73.0 | |||||||||||
Net income | 69.6 | 68.4 | 160.3 | 153.2 | |||||||||||
Net income attributable to noncontrolling interest | 0.6 | 0.4 | 1.6 | 1.1 | |||||||||||
Earnings available for common stock | $69.0 | $68.0 | $158.7 | $152.1 |
10 |
September 30, 2016 | December 31, 2015 | ||||||
(in millions, except per share and share amounts) | |||||||
ASSETS | |||||||
Current assets: | |||||||
Cash and cash equivalents | $5.6 | $0.4 | |||||
Accounts receivable, less allowance for doubtful accounts | 190.7 | 185.4 | |||||
Production fuel, at weighted average cost | 22.6 | 38.6 | |||||
Gas stored underground, at weighted average cost | 20.4 | 25.1 | |||||
Materials and supplies, at weighted average cost | 35.7 | 33.5 | |||||
Regulatory assets | 48.1 | 80.6 | |||||
Other | 53.9 | 59.9 | |||||
Total current assets | 377.0 | 423.5 | |||||
Property, plant and equipment, net | 4,289.1 | 4,103.7 | |||||
Investments: | |||||||
Investment in American Transmission Company LLC | 309.9 | 293.3 | |||||
Other | 13.4 | 15.4 | |||||
Total investments | 323.3 | 308.7 | |||||
Other assets: | |||||||
Regulatory assets | 409.5 | 425.4 | |||||
Deferred charges and other | 6.9 | 9.1 | |||||
Total other assets | 416.4 | 434.5 | |||||
Total assets | $5,405.8 | $5,270.4 |
LIABILITIES AND EQUITY | |||||||
Current liabilities: | |||||||
Commercial paper | $11.8 | $19.9 | |||||
Accounts payable | 122.3 | 136.0 | |||||
Accounts payable to associated companies | 32.8 | 21.6 | |||||
Regulatory liabilities | 45.9 | 56.2 | |||||
Other | 91.0 | 103.2 | |||||
Total current liabilities | 303.8 | 336.9 | |||||
Long-term debt, net (excluding current portion) | 1,534.9 | 1,533.9 | |||||
Other liabilities: | |||||||
Deferred tax liabilities | 1,108.8 | 1,005.4 | |||||
Regulatory liabilities | 198.5 | 192.3 | |||||
Capital lease obligations - Sheboygan Falls Energy Facility | 78.9 | 83.6 | |||||
Pension and other benefit obligations | 186.2 | 188.7 | |||||
Other | 162.4 | 162.0 | |||||
Total other liabilities | 1,734.8 | 1,632.0 | |||||
Commitments and contingencies (Note 13) | |||||||
Equity: | |||||||
Wisconsin Power and Light Company common equity: | |||||||
Common stock - $5 par value - 18,000,000 shares authorized; 13,236,601 shares outstanding | 66.2 | 66.2 | |||||
Additional paid-in capital | 959.0 | 959.0 | |||||
Retained earnings | 788.6 | 731.1 | |||||
Total Wisconsin Power and Light Company common equity | 1,813.8 | 1,756.3 | |||||
Noncontrolling interest | 18.5 | 11.3 | |||||
Total equity | 1,832.3 | 1,767.6 | |||||
Total liabilities and equity | $5,405.8 | $5,270.4 |
11 |
For the Nine Months | |||||||
Ended September 30, | |||||||
2016 | 2015 | ||||||
(in millions) | |||||||
Cash flows from operating activities: | |||||||
Net income | $160.3 | $153.2 | |||||
Adjustments to reconcile net income to net cash flows from operating activities: | |||||||
Depreciation and amortization | 143.5 | 137.5 | |||||
Deferred tax expense and investment tax credits | 97.9 | 60.0 | |||||
Other | (20.3 | ) | (8.3 | ) | |||
Other changes in assets and liabilities: | |||||||
Regulatory assets | 50.7 | (13.2 | ) | ||||
Derivative liabilities | (13.3 | ) | 19.0 | ||||
Other | 20.5 | 27.7 | |||||
Net cash flows from operating activities | 439.3 | 375.9 | |||||
Cash flows used for investing activities: | |||||||
Utility construction and acquisition expenditures | (307.1 | ) | (246.3 | ) | |||
Other | (19.6 | ) | (13.3 | ) | |||
Net cash flows used for investing activities | (326.7 | ) | (259.6 | ) | |||
Cash flows used for financing activities: | |||||||
Common stock dividends | (101.2 | ) | (95.3 | ) | |||
Payments to retire long-term debt | — | (30.6 | ) | ||||
Other | (6.2 | ) | (1.4 | ) | |||
Net cash flows used for financing activities | (107.4 | ) | (127.3 | ) | |||
Net increase (decrease) in cash and cash equivalents | 5.2 | (11.0 | ) | ||||
Cash and cash equivalents at beginning of period | 0.4 | 46.7 | |||||
Cash and cash equivalents at end of period | $5.6 | $35.7 | |||||
Supplemental cash flows information: | |||||||
Cash (paid) refunded during the period for: | |||||||
Interest | ($67.7 | ) | ($69.2 | ) | |||
Income taxes, net | $19.6 | ($10.0 | ) | ||||
Significant non-cash investing and financing activities: | |||||||
Accrued capital expenditures | $50.8 | $57.2 |
12 |
13 |
Alliant Energy | IPL | WPL | |||||||||||||||||||||
September 30, 2016 | December 31, 2015 | September 30, 2016 | December 31, 2015 | September 30, 2016 | December 31, 2015 | ||||||||||||||||||
Tax-related | $1,033.5 | $987.7 | $1,000.7 | $958.2 | $32.8 | $29.5 | |||||||||||||||||
Pension and OPEB costs | 551.0 | 579.5 | 284.7 | 298.1 | 266.3 | 281.4 | |||||||||||||||||
AROs | 103.9 | 92.4 | 61.5 | 50.8 | 42.4 | 41.6 | |||||||||||||||||
WPL’s EGUs retired early | 43.1 | 45.0 | — | — | 43.1 | 45.0 | |||||||||||||||||
Derivatives | 39.0 | 70.6 | 10.6 | 28.2 | 28.4 | 42.4 | |||||||||||||||||
Emission allowances | 26.3 | 26.9 | 26.3 | 26.9 | — | — | |||||||||||||||||
Commodity cost recovery | 10.1 | 35.9 | 0.4 | 2.8 | 9.7 | 33.1 | |||||||||||||||||
Other | 67.9 | 70.6 | 33.0 | 37.6 | 34.9 | 33.0 | |||||||||||||||||
$1,874.8 | $1,908.6 | $1,417.2 | $1,402.6 | $457.6 | $506.0 |
Alliant Energy | IPL | WPL | |||||||||||||||||||||
September 30, 2016 | December 31, 2015 | September 30, 2016 | December 31, 2015 | September 30, 2016 | December 31, 2015 | ||||||||||||||||||
Cost of removal obligations | $410.6 | $406.0 | $267.2 | $260.4 | $143.4 | $145.6 | |||||||||||||||||
IPL’s tax benefit riders | 103.1 | 159.2 | 103.1 | 159.2 | — | — | |||||||||||||||||
Electric transmission cost recovery | 54.5 | 43.5 | 25.0 | 21.9 | 29.5 | 21.6 | |||||||||||||||||
Commodity cost recovery | 39.1 | 37.6 | 15.1 | 23.5 | 24.0 | 14.1 | |||||||||||||||||
Energy efficiency cost recovery | 28.0 | 48.3 | — | — | 28.0 | 48.3 | |||||||||||||||||
Other | 40.5 | 43.1 | 21.0 | 24.2 | 19.5 | 18.9 | |||||||||||||||||
$675.8 | $737.7 | $431.4 | $489.2 | $244.4 | $248.5 |
Electric tax benefit rider credits | $47 | ||
Gas tax benefit rider credits | 9 | ||
$56 |
14 |
Three Months | Nine Months | ||||||||||||
2016 | 2015 | 2016 | 2015 | ||||||||||
Billing credits to reduce retail electric customers’ bills | $3 | $7 | $7 | $19 |
15 |
Three Months | Nine Months | ||||||||||||||
2016 | 2015 | 2016 | 2015 | ||||||||||||
Maximum outstanding aggregate cash proceeds (based on daily outstanding balances) | $172.0 | $137.0 | $172.0 | $137.0 | |||||||||||
Average outstanding aggregate cash proceeds (based on daily outstanding balances) | 112.3 | 41.2 | 91.5 | 62.1 |
September 30, 2016 | December 31, 2015 | ||||||
Customer accounts receivable | $172.9 | $109.7 | |||||
Unbilled utility revenues | 79.8 | 71.3 | |||||
Other receivables | 0.2 | 0.1 | |||||
Receivables sold to third party | 252.9 | 181.1 | |||||
Less: cash proceeds (a) | 1.0 | 5.0 | |||||
Deferred proceeds | 251.9 | 176.1 | |||||
Less: allowance for doubtful accounts | 12.2 | 4.1 | |||||
Fair value of deferred proceeds | $239.7 | $172.0 |
(a) | Changes in cash proceeds are presented in “Sales of accounts receivable” in operating activities in Alliant Energy’s and IPL’s cash flows statements. |
Three Months | Nine Months | ||||||||||||||
2016 | 2015 | 2016 | 2015 | ||||||||||||
Collections reinvested in receivables | $499.7 | $480.1 | $1,362.1 | $1,403.1 | |||||||||||
Write-offs (recoveries), net | (0.3 | ) | 3.3 | (0.6 | ) | 6.8 |
16 |
Alliant Energy | WPL | ||||||||||||||||||||||||||||||
Three Months | Nine Months | Three Months | Nine Months | ||||||||||||||||||||||||||||
2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | ||||||||||||||||||||||||
ATC | ($9.1 | ) | ($10.9 | ) | ($28.6 | ) | ($29.6 | ) | ($9.1 | ) | ($10.9 | ) | ($28.6 | ) | ($29.6 | ) | |||||||||||||||
Other | (0.1 | ) | (0.2 | ) | (0.2 | ) | 0.7 | (0.2 | ) | (0.2 | ) | (0.4 | ) | (0.6 | ) | ||||||||||||||||
($9.2 | ) | ($11.1 | ) | ($28.8 | ) | ($28.9 | ) | ($9.3 | ) | ($11.1 | ) | ($29.0 | ) | ($30.2 | ) |
Shares outstanding, January 1, 2016 | 226,918,432 | |
Shareowner Direct Plan issuances | 559,588 | |
Equity-based compensation plans (Note 9(b)) | 22,408 | |
Shares outstanding, September 30, 2016 | 227,500,428 |
17 |
Alliant Energy | Parent | ||||||
September 30, 2016 | (Consolidated) | Company | IPL | WPL | |||
Commercial paper: | |||||||
Amount outstanding | $238.3 | $226.5 | $— | $11.8 | |||
Weighted average remaining maturity | 4 days | 4 days | N/A | 3 days | |||
Weighted average interest rates | 0.6% | 0.7% | N/A | 0.4% | |||
Available credit facility capacity | $761.7 | $73.5 | $300.0 | $388.2 |
Alliant Energy | IPL | WPL | |||||||||||||||||
Three Months Ended September 30 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | |||||||||||||
Maximum amount outstanding (based on daily outstanding balances) | $248.0 | $181.2 | $3.1 | $18.4 | $55.4 | $— | |||||||||||||
Average amount outstanding (based on daily outstanding balances) | $220.1 | $122.4 | $0.1 | $0.5 | $36.4 | $— | |||||||||||||
Weighted average interest rates | 0.6 | % | 0.4 | % | 0.6 | % | 0.4 | % | 0.4% | N/A | |||||||||
Nine Months Ended September 30 | |||||||||||||||||||
Maximum amount outstanding (based on daily outstanding balances) | $248.0 | $181.2 | $3.1 | $18.4 | $62.9 | $— | |||||||||||||
Average amount outstanding (based on daily outstanding balances) | $210.7 | $114.5 | $— | $0.2 | $33.2 | $— | |||||||||||||
Weighted average interest rates | 0.6 | % | 0.4 | % | 0.6 | % | 0.4 | % | 0.4% | N/A |
18 |
Alliant Energy | IPL | WPL | |||||||||||||||
Three Months Ended September 30 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | |||||||||||
Statutory federal income tax rate | 35.0 | % | 35.0 | % | 35.0 | % | 35.0 | % | 35.0 | % | 35.0 | % | |||||
IPL’s tax benefit riders | (13.1 | ) | (11.0 | ) | (20.1 | ) | (30.0 | ) | — | — | |||||||
Effect of rate-making on property-related differences | (11.9 | ) | (7.1 | ) | (16.5 | ) | (18.7 | ) | (0.7 | ) | (0.7 | ) | |||||
Production tax credits | (9.0 | ) | (6.7 | ) | (6.0 | ) | (8.6 | ) | (5.7 | ) | (6.1 | ) | |||||
Other items, net | 4.4 | 3.0 | 5.4 | 3.7 | 4.0 | 4.1 | |||||||||||
Overall income tax rate | 5.4 | % | 13.2 | % | (2.2 | %) | (18.6 | %) | 32.6 | % | 32.3 | % |
Alliant Energy | IPL | WPL | |||||||||||||||
Nine Months Ended September 30 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | |||||||||||
Statutory federal income tax rate | 35.0 | % | 35.0 | % | 35.0 | % | 35.0 | % | 35.0 | % | 35.0 | % | |||||
IPL’s tax benefit riders | (10.2 | ) | (10.6 | ) | (19.6 | ) | (28.2 | ) | — | — | |||||||
Effect of rate-making on property-related differences | (8.2 | ) | (7.1 | ) | (14.8 | ) | (17.9 | ) | (0.8 | ) | (0.6 | ) | |||||
Production tax credits | (7.2 | ) | (6.6 | ) | (6.1 | ) | (8.0 | ) | (6.1 | ) | (6.3 | ) | |||||
Other items, net | 3.5 | 3.7 | 4.2 | 4.2 | 4.4 | 4.2 | |||||||||||
Overall income tax rate | 12.9 | % | 14.4 | % | (1.3 | %) | (14.9 | %) | 32.5 | % | 32.3 | % |
Alliant Energy | IPL | WPL | |||||||||||||||||||||||
Earliest Expiration Date | Tax Carryforwards | Deferred Tax Assets | Tax Carryforwards | Deferred Tax Assets | Tax Carryforwards | Deferred Tax Assets | |||||||||||||||||||
Federal net operating losses | 2030 | $587 | $201 | $255 | $86 | $242 | $85 | ||||||||||||||||||
State net operating losses | 2018 | 674 | 35 | 15 | 1 | 3 | — | ||||||||||||||||||
Federal tax credits | 2022 | 264 | 260 | 95 | 91 | 108 | 107 | ||||||||||||||||||
$496 | $178 | $192 |
19 |
Defined Benefit Pension Plans | OPEB Plans | ||||||||||||||||||||||||||||||
Three Months | Nine Months | Three Months | Nine Months | ||||||||||||||||||||||||||||
Alliant Energy | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | |||||||||||||||||||||||
Service cost | $3.2 | $4.0 | $9.5 | $11.9 | $1.4 | $1.3 | $4.0 | $4.1 | |||||||||||||||||||||||
Interest cost | 13.2 | 13.5 | 39.7 | 40.3 | 2.3 | 2.3 | 7.0 | 6.8 | |||||||||||||||||||||||
Expected return on plan assets | (16.3 | ) | (18.7 | ) | (49.1 | ) | (56.2 | ) | (1.6 | ) | (2.1 | ) | (4.6 | ) | (6.3 | ) | |||||||||||||||
Amortization of prior service credit | (0.1 | ) | (0.1 | ) | (0.2 | ) | (0.2 | ) | (1.0 | ) | (2.8 | ) | (3.1 | ) | (8.4 | ) | |||||||||||||||
Amortization of actuarial loss | 9.3 | 8.8 | 28.0 | 26.5 | 1.2 | 1.2 | 3.6 | 3.6 | |||||||||||||||||||||||
Additional benefit costs | — | 0.1 | — | 0.4 | — | — | — | — | |||||||||||||||||||||||
$9.3 | $7.6 | $27.9 | $22.7 | $2.3 | ($0.1 | ) | $6.9 | ($0.2 | ) |
Defined Benefit Pension Plans | OPEB Plans | ||||||||||||||||||||||||||||||
Three Months | Nine Months | Three Months | Nine Months | ||||||||||||||||||||||||||||
IPL | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | |||||||||||||||||||||||
Service cost | $1.8 | $2.2 | $5.6 | $6.6 | $0.5 | $0.6 | $1.7 | $1.8 | |||||||||||||||||||||||
Interest cost | 6.1 | 6.2 | 18.4 | 18.7 | 1.0 | 0.9 | 2.9 | 2.8 | |||||||||||||||||||||||
Expected return on plan assets | (7.7 | ) | (8.9 | ) | (23.2 | ) | (26.8 | ) | (1.0 | ) | (1.4 | ) | (3.2 | ) | (4.2 | ) | |||||||||||||||
Amortization of prior service credit | — | — | (0.1 | ) | (0.1 | ) | (0.7 | ) | (1.5 | ) | (2.0 | ) | (4.6 | ) | |||||||||||||||||
Amortization of actuarial loss | 4.2 | 3.8 | 12.4 | 11.5 | 0.7 | 0.6 | 2.0 | 1.7 | |||||||||||||||||||||||
$4.4 | $3.3 | $13.1 | $9.9 | $0.5 | ($0.8 | ) | $1.4 | ($2.5 | ) |
Defined Benefit Pension Plans | OPEB Plans | ||||||||||||||||||||||||||||||
Three Months | Nine Months | Three Months | Nine Months | ||||||||||||||||||||||||||||
WPL | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | |||||||||||||||||||||||
Service cost | $1.3 | $1.4 | $3.7 | $4.3 | $0.5 | $0.5 | $1.5 | $1.6 | |||||||||||||||||||||||
Interest cost | 5.5 | 5.6 | 16.7 | 16.9 | 0.9 | 0.9 | 2.8 | 2.7 | |||||||||||||||||||||||
Expected return on plan assets | (7.0 | ) | (8.1 | ) | (21.2 | ) | (24.3 | ) | (0.2 | ) | (0.3 | ) | (0.6 | ) | (1.1 | ) | |||||||||||||||
Amortization of prior service cost (credit) | — | 0.1 | 0.1 | 0.2 | (0.3 | ) | (0.9 | ) | (0.7 | ) | (2.6 | ) | |||||||||||||||||||
Amortization of actuarial loss | 4.4 | 4.2 | 13.2 | 12.6 | 0.5 | 0.6 | 1.4 | 1.7 | |||||||||||||||||||||||
Additional benefit costs | — | 0.1 | — | 0.4 | — | — | — | — | |||||||||||||||||||||||
$4.2 | $3.3 | $12.5 | $10.1 | $1.4 | $0.8 | $4.4 | $2.3 |
Alliant Energy | IPL | WPL | |||||||||||||||||||||||||||||||||||||||||||||
Three Months | Nine Months | Three Months | Nine Months | Three Months | Nine Months | ||||||||||||||||||||||||||||||||||||||||||
2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | ||||||||||||||||||||||||||||||||||||
401(k) costs | $5.6 | $6.4 | $17.5 | $18.7 | $2.8 | $3.3 | $8.8 | $9.6 | $2.6 | $2.9 | $8.0 | $8.4 |
20 |
Alliant Energy | IPL | WPL | |||||||||||||||||||||||||||||||||||||||||||||
Three Months | Nine Months | Three Months | Nine Months | Three Months | Nine Months | ||||||||||||||||||||||||||||||||||||||||||
2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | ||||||||||||||||||||||||||||||||||||
Compensation expense | $4.4 | $0.3 | $16.8 | $5.8 | $2.4 | $0.2 | $8.9 | $3.1 | $1.9 | $0.1 | $7.3 | $2.5 | |||||||||||||||||||||||||||||||||||
Income tax benefits | 1.7 | 0.2 | 6.8 | 2.4 | 1.0 | 0.1 | 3.7 | 1.3 | 0.7 | — | 2.9 | 1.0 |
Performance Shares | Performance Units | ||||||||||
2016 | 2015 | 2016 | 2015 | ||||||||
Nonvested awards, January 1 | 288,430 | 288,848 | 116,412 | 127,330 | |||||||
Granted | 68,585 | 90,806 | 23,918 | 35,674 | |||||||
Vested | (98,186 | ) | (91,224 | ) | (42,760 | ) | (45,690 | ) | |||
Forfeited | (1,230 | ) | — | (4,250 | ) | (902 | ) | ||||
Nonvested awards, September 30 | 257,599 | 288,430 | 93,320 | 116,412 |
Performance Shares | Performance Units | ||||||||||||||
2016 | 2015 | 2016 | 2015 | ||||||||||||
2013 Grant | 2012 Grant | 2013 Grant | 2012 Grant | ||||||||||||
Performance awards vested | 98,186 | 91,224 | 42,760 | 45,690 | |||||||||||
Percentage of target number of performance awards | 165.0 | % | 167.5 | % | 165.0 | % | 167.5 | % | |||||||
Aggregate payout value (in millions) | $5.1 | $5.1 | $1.7 | $1.6 | |||||||||||
Payout - cash (in millions) | $2.9 | $3.2 | $1.7 | $1.6 | |||||||||||
Payout - common stock shares issued | 22,408 | 21,950 | N/A | N/A |
Performance Shares | Performance Units | ||||||||||||||||||||||
2016 Grant | 2015 Grant | 2014 Grant | 2016 Grant | 2015 Grant | 2014 Grant | ||||||||||||||||||
Nonvested awards | 67,355 | 90,806 | 99,438 | 22,657 | 33,268 | 37,395 | |||||||||||||||||
Alliant Energy common stock closing price on September 30, 2016 | $38.31 | $38.31 | $38.31 | $38.31 | N/A | N/A | |||||||||||||||||
Alliant Energy common stock closing price on grant date | N/A | N/A | N/A | N/A | $32.55 | $26.89 | |||||||||||||||||
Estimated payout percentage based on performance criteria | 125 | % | 168 | % | 175 | % | 125 | % | 168 | % | 175 | % | |||||||||||
Fair values of each nonvested award | $47.89 | $64.36 | $67.04 | $47.89 | $54.68 | $47.05 |
21 |
2016 | 2015 | ||||||||||||
Shares | Weighted Average Grant Date Fair Value | Shares | Weighted Average Grant Date Fair Value | ||||||||||
Nonvested shares, January 1 | 190,244 | $29.59 | 197,624 | $25.35 | |||||||||
Granted | — | — | 90,806 | 32.55 | |||||||||
Vested (a) | — | — | (98,186 | ) | 23.79 | ||||||||
Nonvested shares, September 30 | 190,244 | 29.59 | 190,244 | 29.59 |
(a) | In 2015, 98,186 performance contingent restricted shares granted in 2013 vested because the specified performance criteria for such shares were met. |
2016 | ||||||
Units | Weighted Average Grant Date Fair Value | |||||
Granted | 68,585 | $33.96 | ||||
Forfeited | (1,230 | ) | 33.90 | |||
Nonvested units, September 30 | 67,355 | 33.96 |
2016 | ||
Granted | 23,918 | |
Forfeited | (1,261 | ) |
Nonvested units, September 30 | 22,657 |
22 |
2016 | ||
Granted | 45,056 | |
Forfeited | (2,016 | ) |
Nonvested units, September 30 | 43,040 |
2016 | |||||
Restricted Stock Units | Restricted Units | ||||
Granted | 58,790 | 20,502 | |||
Forfeited | (1,054 | ) | (1,082 | ) | |
Nonvested units, September 30 | 57,736 | 19,420 |
2016 | 2015 | ||||
Nonvested awards, January 1 | 163,752 | 157,860 | |||
Granted | — | 82,210 | |||
Vested (a) | — | (74,664 | ) | ||
Forfeited | (3,652 | ) | (1,654 | ) | |
Nonvested awards, September 30 | 160,100 | 163,752 |
(a) | In 2015, 74,664 performance-contingent cash awards granted in 2013 vested, resulting in cash payouts valued at $2.4 million. |
Alliant Energy | IPL | WPL | |||||||||||||||||||||
2016 | 2015 | 2016 | 2015 | 2016 | 2015 | ||||||||||||||||||
Balance, January 1 | $214.0 | $114.0 | $132.9 | $51.8 | $71.9 | $52.4 | |||||||||||||||||
Revisions in estimated cash flows (a) | 3.9 | 8.9 | 4.2 | 11.9 | (0.3 | ) | (1.9 | ) | |||||||||||||||
Liabilities settled | (11.2 | ) | (7.1 | ) | (5.0 | ) | (3.1 | ) | (6.2 | ) | (4.0 | ) | |||||||||||
Liabilities incurred (a) | 2.6 | 76.1 | 0.7 | 59.9 | 1.9 | 16.2 | |||||||||||||||||
Accretion expense | 4.8 | 3.4 | 2.8 | 1.6 | 1.7 | 1.4 | |||||||||||||||||
Balance, September 30 | $214.1 | $195.3 | $135.6 | $122.1 | $69.0 | $64.1 |
(a) | In April 2015, the EPA published the final CCR Rule, which regulates CCR as a non-hazardous waste and was effective October 2015. IPL and WPL have nine and three coal-fired EGUs, respectively, with coal ash ponds that are impacted by this rule. In addition, IPL and WPL have four and two active CCR landfills, respectively, that are impacted by this rule. During the nine months ended September 30, 2015, Alliant Energy, IPL and WPL recognized additional AROs of $74 million, $57 million and $17 million, respectively, as a result of the final CCR Rule. The increases in AROs resulted in corresponding increases in property, plant and equipment, net on the respective balance sheets. |
23 |
Risk management purpose | Type of instrument |
Mitigate pricing volatility for: | |
Electricity purchased to supply customers | Electric swap and physical forward contracts (IPL and WPL) |
Fuel used to supply natural gas-fired EGUs | Natural gas swap and physical forward contracts (IPL and WPL) |
Natural gas supplied to retail customers | Natural gas options and physical forward contracts (IPL and WPL) |
Natural gas swap contracts (IPL) | |
Fuel used at coal-fired EGUs | Coal physical forward contracts (IPL and WPL) |
Optimize the value of natural gas pipeline capacity | Natural gas physical forward contracts (IPL and WPL) |
Natural gas swap contracts (IPL) | |
Manage transmission congestion costs | FTRs (IPL and WPL) |
Manage rail transportation costs | Diesel fuel swap contracts (WPL) |
24 |
Alliant Energy | September 30, 2016 | December 31, 2015 | |||||||||||||||||||||||||||||||||||||
Fair Value | Fair Value | ||||||||||||||||||||||||||||||||||||||
Carrying | Level | Level | Level | Carrying | Level | Level | Level | ||||||||||||||||||||||||||||||||
Amount | 1 | 2 | 3 | Total | Amount | 1 | 2 | 3 | Total | ||||||||||||||||||||||||||||||
Assets: | |||||||||||||||||||||||||||||||||||||||
Derivatives | $27.8 | $— | $1.9 | $25.9 | $27.8 | $18.4 | $— | $2.5 | $15.9 | $18.4 | |||||||||||||||||||||||||||||
Deferred proceeds | 239.7 | — | — | 239.7 | 239.7 | 172.0 | — | — | 172.0 | 172.0 | |||||||||||||||||||||||||||||
Liabilities and equity: | |||||||||||||||||||||||||||||||||||||||
Derivatives | 36.9 | — | 3.1 | 33.8 | 36.9 | 64.6 | — | 16.0 | 48.6 | 64.6 | |||||||||||||||||||||||||||||
Long-term debt (including current maturities) | 4,130.9 | — | 4,868.3 | 3.3 | 4,871.6 | 3,835.6 | — | 4,332.4 | 3.7 | 4,336.1 | |||||||||||||||||||||||||||||
Cumulative preferred stock of IPL | 200.0 | 215.4 | — | — | 215.4 | 200.0 | 206.6 | — | — | 206.6 |
IPL | September 30, 2016 | December 31, 2015 | |||||||||||||||||||||||||||||||||||||
Fair Value | Fair Value | ||||||||||||||||||||||||||||||||||||||
Carrying | Level | Level | Level | Carrying | Level | Level | Level | ||||||||||||||||||||||||||||||||
Amount | 1 | 2 | 3 | Total | Amount | 1 | 2 | 3 | Total | ||||||||||||||||||||||||||||||
Assets: | |||||||||||||||||||||||||||||||||||||||
Derivatives | $22.2 | $— | $1.2 | $21.0 | $22.2 | $15.5 | $— | $2.0 | $13.5 | $15.5 | |||||||||||||||||||||||||||||
Deferred proceeds | 239.7 | — | — | 239.7 | 239.7 | 172.0 | — | — | 172.0 | 172.0 | |||||||||||||||||||||||||||||
Liabilities and equity: | |||||||||||||||||||||||||||||||||||||||
Derivatives | 9.0 | — | 1.4 | 7.6 | 9.0 | 23.4 | — | 8.0 | 15.4 | 23.4 | |||||||||||||||||||||||||||||
Long-term debt (including current maturities) | 2,153.1 | — | 2,495.8 | — | 2,495.8 | 1,856.9 | — | 2,092.7 | — | 2,092.7 | |||||||||||||||||||||||||||||
Cumulative preferred stock | 200.0 | 215.4 | — | — | 215.4 | 200.0 | 206.6 | — | — | 206.6 |
WPL | September 30, 2016 | December 31, 2015 | |||||||||||||||||||||||||||||||||||||
Fair Value | Fair Value | ||||||||||||||||||||||||||||||||||||||
Carrying | Level | Level | Level | Carrying | Level | Level | Level | ||||||||||||||||||||||||||||||||
Amount | 1 | 2 | 3 | Total | Amount | 1 | 2 | 3 | Total | ||||||||||||||||||||||||||||||
Assets: | |||||||||||||||||||||||||||||||||||||||
Derivatives | $5.6 | $— | $0.7 | $4.9 | $5.6 | $2.9 | $— | $0.5 | $2.4 | $2.9 | |||||||||||||||||||||||||||||
Liabilities and equity: | |||||||||||||||||||||||||||||||||||||||
Derivatives | 27.9 | — | 1.7 | 26.2 | 27.9 | 41.2 | — | 8.0 | 33.2 | 41.2 | |||||||||||||||||||||||||||||
Long-term debt (including current maturities) | 1,534.9 | — | 1,920.4 | — | 1,920.4 | 1,533.9 | — | 1,793.0 | — | 1,793.0 |
25 |
Alliant Energy | Commodity Contract Derivative | ||||||||||||||
Assets and (Liabilities), net | Deferred Proceeds | ||||||||||||||
Three Months Ended September 30 | 2016 | 2015 | 2016 | 2015 | |||||||||||
Beginning balance, July 1 | $0.6 | $0.6 | $74.4 | $73.4 | |||||||||||
Total net losses included in changes in net assets (realized/unrealized) | (5.1 | ) | (21.1 | ) | — | — | |||||||||
Transfers out of Level 3 | 0.8 | — | — | — | |||||||||||
Sales | (0.2 | ) | (0.4 | ) | — | — | |||||||||
Settlements (a) | (4.0 | ) | (3.7 | ) | 165.3 | 122.1 | |||||||||
Ending balance, September 30 | ($7.9 | ) | ($24.6 | ) | $239.7 | $195.5 | |||||||||
The amount of total net losses for the period included in changes in net assets attributable to the change in unrealized losses relating to assets and liabilities held at September 30 | ($5.0 | ) | ($18.4 | ) | $— | $— |
Alliant Energy | Commodity Contract Derivative | ||||||||||||||
Assets and (Liabilities), net | Deferred Proceeds | ||||||||||||||
Nine Months Ended September 30 | 2016 | 2015 | 2016 | 2015 | |||||||||||
Beginning balance, January 1 | ($32.7 | ) | $17.9 | $172.0 | $177.2 | ||||||||||
Total net gains (losses) included in changes in net assets (realized/unrealized) | 8.0 | (58.2 | ) | — | — | ||||||||||
Transfers into Level 3 | 0.9 | — | — | — | |||||||||||
Transfers out of Level 3 | 1.2 | 0.6 | — | — | |||||||||||
Purchases | 22.0 | 36.9 | — | — | |||||||||||
Sales | (0.9 | ) | (1.7 | ) | — | — | |||||||||
Settlements (a) | (6.4 | ) | (20.1 | ) | 67.7 | 18.3 | |||||||||
Ending balance, September 30 | ($7.9 | ) | ($24.6 | ) | $239.7 | $195.5 | |||||||||
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30 | $9.7 | ($52.2 | ) | $— | $— |
IPL | Commodity Contract Derivative | ||||||||||||||
Assets and (Liabilities), net | Deferred Proceeds | ||||||||||||||
Three Months Ended September 30 | 2016 | 2015 | 2016 | 2015 | |||||||||||
Beginning balance, July 1 | $18.3 | $18.3 | $74.4 | $73.4 | |||||||||||
Total net losses included in changes in net assets (realized/unrealized) | (0.4 | ) | (8.6 | ) | — | — | |||||||||
Transfers out of Level 3 | 0.3 | — | — | — | |||||||||||
Sales | (0.2 | ) | (0.4 | ) | — | — | |||||||||
Settlements (a) | (4.6 | ) | (5.5 | ) | 165.3 | 122.1 | |||||||||
Ending balance, September 30 | $13.4 | $3.8 | $239.7 | $195.5 | |||||||||||
The amount of total net losses for the period included in changes in net assets attributable to the change in unrealized losses relating to assets and liabilities held at September 30 | ($0.4 | ) | ($8.0 | ) | $— | $— |
IPL | Commodity Contract Derivative | ||||||||||||||
Assets and (Liabilities), net | Deferred Proceeds | ||||||||||||||
Nine Months Ended September 30 | 2016 | 2015 | 2016 | 2015 | |||||||||||
Beginning balance, January 1 | ($1.9 | ) | $19.4 | $172.0 | $177.2 | ||||||||||
Total net gains (losses) included in changes in net assets (realized/unrealized) | 4.8 | (26.0 | ) | — | — | ||||||||||
Transfers into Level 3 | 0.5 | — | — | — | |||||||||||
Transfers out of Level 3 | 0.2 | — | — | — | |||||||||||
Purchases | 20.6 | 33.1 | — | — | |||||||||||
Sales | (0.9 | ) | (1.6 | ) | — | — | |||||||||
Settlements (a) | (9.9 | ) | (21.1 | ) | 67.7 | 18.3 | |||||||||
Ending balance, September 30 | $13.4 | $3.8 | $239.7 | $195.5 | |||||||||||
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30 | $5.7 | ($21.2 | ) | $— | $— |
26 |
WPL | Commodity Contract Derivative | ||||||
Assets and (Liabilities), net | |||||||
Three Months Ended September 30 | 2016 | 2015 | |||||
Beginning balance, July 1 | ($17.7 | ) | ($17.7 | ) | |||
Total net losses included in changes in net assets (realized/unrealized) | (4.7 | ) | (12.5 | ) | |||
Transfers out of Level 3 | 0.5 | — | |||||
Settlements | 0.6 | 1.8 | |||||
Ending balance, September 30 | ($21.3 | ) | ($28.4 | ) | |||
The amount of total net losses for the period included in changes in net assets attributable to the change in unrealized losses relating to assets and liabilities held at September 30 | ($4.6 | ) | ($10.4 | ) |
WPL | Commodity Contract Derivative | ||||||
Assets and (Liabilities), net | |||||||
Nine Months Ended September 30 | 2016 | 2015 | |||||
Beginning balance, January 1 | ($30.8 | ) | ($1.5 | ) | |||
Total net gains (losses) included in changes in net assets (realized/unrealized) | 3.2 | (32.2 | ) | ||||
Transfers into Level 3 | 0.4 | — | |||||
Transfers out of Level 3 | 1.0 | 0.6 | |||||
Purchases | 1.4 | 3.8 | |||||
Sales | — | (0.1 | ) | ||||
Settlements | 3.5 | 1.0 | |||||
Ending balance, September 30 | ($21.3 | ) | ($28.4 | ) | |||
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30 | $4.0 | ($31.0 | ) |
(a) | Settlements related to deferred proceeds are due to the change in the carrying amount of receivables sold less the allowance for doubtful accounts associated with the receivables sold and cash proceeds received from the receivables sold. |
Alliant Energy | IPL | WPL | |||||||||||||||||||||
Excluding FTRs | FTRs | Excluding FTRs | FTRs | Excluding FTRs | FTRs | ||||||||||||||||||
September 30, 2016 | ($26.3 | ) | $18.4 | ($3.5 | ) | $16.9 | ($22.8 | ) | $1.5 | ||||||||||||||
December 31, 2015 | (43.1 | ) | 10.4 | (12.3 | ) | 10.4 | (30.8 | ) | — |
Electricity | FTRs | Natural Gas | Coal | Diesel Fuel | ||||||||||||||||||||
MWhs | Years | MWhs | Years | Dths | Years | Tons | Years | Gallons | Years | |||||||||||||||
Alliant Energy | 3,427 | 2016-2018 | 14,437 | 2016-2017 | 82,277 | 2016-2020 | 4,640 | 2016-2019 | 3,780 | 2016-2017 | ||||||||||||||
IPL | 187 | 2016 | 8,865 | 2016-2017 | 47,141 | 2016-2020 | 2,202 | 2016-2019 | — | — | ||||||||||||||
WPL | 3,240 | 2016-2018 | 5,572 | 2016-2017 | 35,136 | 2016-2020 | 2,438 | 2016-2018 | 3,780 | 2016-2017 |
27 |
Alliant Energy | IPL | WPL | |||||||||||||||||||||
Commodity contracts | September 30, 2016 | December 31, 2015 | September 30, 2016 | December 31, 2015 | September 30, 2016 | December 31, 2015 | |||||||||||||||||
Current derivative assets | $25.1 | $15.1 | $20.5 | $13.8 | $4.6 | $1.3 | |||||||||||||||||
Non-current derivative assets | 2.7 | 3.3 | 1.7 | 1.7 | 1.0 | 1.6 | |||||||||||||||||
Current derivative liabilities | 21.2 | 47.3 | 5.4 | 18.5 | 15.8 | 28.8 | |||||||||||||||||
Non-current derivative liabilities | 15.7 | 17.3 | 3.6 | 4.9 | 12.1 | 12.4 |
Alliant Energy | IPL | WPL | |||||||||
Purchased power (a): | |||||||||||
DAEC (IPL) | $1,320 | $1,320 | $— | ||||||||
Other | 139 | 1 | 138 | ||||||||
1,459 | 1,321 | 138 | |||||||||
Natural gas | 557 | 231 | 326 | ||||||||
Coal (b) | 193 | 85 | 108 | ||||||||
SO2 emission allowances | 8 | 8 | — | ||||||||
Other (c) | 21 | 4 | 1 | ||||||||
$2,238 | $1,649 | $573 |
28 |
(a) | Includes payments required by purchased power agreements for capacity rights and minimum quantities of MWhs required to be purchased. |
(b) | Corporate Services entered into system-wide coal contracts on behalf of IPL and WPL that include minimum future commitments. These commitments were assigned to IPL and WPL based on information available as of September 30, 2016 regarding expected future usage, which is subject to change. |
(c) | Includes individual commitments incurred during the normal course of business that exceeded $1 million at September 30, 2016. |
29 |
Alliant Energy | IPL | WPL | |||||||||||||||
Range of estimated future costs | $11 | - | $27 | $9 | - | $23 | $2 | - | $4 | ||||||||
Current and non-current environmental liabilities | 15 | 12 | 3 |
30 |
Utility | Non-Regulated, | Alliant Energy | |||||||||||||||||||||
Electric | Gas | Other | Total | Parent and Other | Consolidated | ||||||||||||||||||
(in millions) | |||||||||||||||||||||||
Three Months Ended September 30, 2016 | |||||||||||||||||||||||
Operating revenues | $864.3 | $39.5 | $9.4 | $913.2 | $11.4 | $924.6 | |||||||||||||||||
Operating income (loss) | 244.2 | (3.7 | ) | 0.4 | 240.9 | (78.3 | ) | 162.6 | |||||||||||||||
Amounts attributable to Alliant Energy common shareowners: | |||||||||||||||||||||||
Income (loss) from continuing operations, net of tax | 183.1 | (54.3 | ) | 128.8 | |||||||||||||||||||
Loss from discontinued operations, net of tax | — | (0.4 | ) | (0.4 | ) | ||||||||||||||||||
Net income (loss) | 183.1 | (54.7 | ) | 128.4 | |||||||||||||||||||
Three Months Ended September 30, 2015 | |||||||||||||||||||||||
Operating revenues | $835.8 | $38.0 | $13.4 | $887.2 | $11.7 | $898.9 | |||||||||||||||||
Operating income (loss) | 232.8 | (5.7 | ) | 0.2 | 227.3 | 8.6 | 235.9 | ||||||||||||||||
Amounts attributable to Alliant Energy common shareowners: | |||||||||||||||||||||||
Income (loss) from continuing operations, net of tax | 184.5 | (4.5 | ) | 180.0 | |||||||||||||||||||
Loss from discontinued operations, net of tax | — | (0.1 | ) | (0.1 | ) | ||||||||||||||||||
Net income (loss) | 184.5 | (4.6 | ) | 179.9 |
31 |
Utility | Non-Regulated, | Alliant Energy | |||||||||||||||||||||
Electric | Gas | Other | Total | Parent and Other | Consolidated | ||||||||||||||||||
(in millions) | |||||||||||||||||||||||
Nine Months Ended September 30, 2016 | |||||||||||||||||||||||
Operating revenues | $2,209.1 | $248.7 | $35.0 | $2,492.8 | $30.2 | $2,523.0 | |||||||||||||||||
Operating income (loss) | 473.3 | 27.0 | 4.4 | 504.7 | (67.6 | ) | 437.1 | ||||||||||||||||
Amounts attributable to Alliant Energy common shareowners: | |||||||||||||||||||||||
Income (loss) from continuing operations, net of tax | 350.3 | (39.5 | ) | 310.8 | |||||||||||||||||||
Loss from discontinued operations, net of tax | — | (2.0 | ) | (2.0 | ) | ||||||||||||||||||
Net income (loss) | 350.3 | (41.5 | ) | 308.8 | |||||||||||||||||||
Nine Months Ended September 30, 2015 | |||||||||||||||||||||||
Operating revenues | $2,147.5 | $288.1 | $44.6 | $2,480.2 | $33.3 | $2,513.5 | |||||||||||||||||
Operating income | 438.4 | 28.6 | 8.7 | 475.7 | 22.1 | 497.8 | |||||||||||||||||
Amounts attributable to Alliant Energy common shareowners: | |||||||||||||||||||||||
Income from continuing operations, net of tax | 332.6 | 12.9 | 345.5 | ||||||||||||||||||||
Loss from discontinued operations, net of tax | — | (1.4 | ) | (1.4 | ) | ||||||||||||||||||
Net income | 332.6 | 11.5 | 344.1 |
Electric | Gas | Other | Total | ||||||||||||
(in millions) | |||||||||||||||
Three Months Ended September 30, 2016 | |||||||||||||||
Operating revenues | $483.2 | $23.9 | $9.1 | $516.2 | |||||||||||
Operating income (loss) | 125.9 | (1.4 | ) | 1.4 | 125.9 | ||||||||||
Earnings available for common stock | 114.1 | ||||||||||||||
Three Months Ended September 30, 2015 | |||||||||||||||
Operating revenues | $468.6 | $23.1 | $12.9 | $504.6 | |||||||||||
Operating income (loss) | 119.4 | (2.9 | ) | 0.5 | 117.0 | ||||||||||
Earnings available for common stock | 116.5 | ||||||||||||||
Nine Months Ended September 30, 2016 | |||||||||||||||
Operating revenues | $1,209.2 | $142.6 | $34.1 | $1,385.9 | |||||||||||
Operating income | 213.8 | 15.3 | 6.8 | 235.9 | |||||||||||
Earnings available for common stock | 191.6 | ||||||||||||||
Nine Months Ended September 30, 2015 | |||||||||||||||
Operating revenues | $1,170.6 | $164.1 | $41.1 | $1,375.8 | |||||||||||
Operating income | 193.6 | 15.3 | 7.4 | 216.3 | |||||||||||
Earnings available for common stock | 180.5 |
32 |
Electric | Gas | Other | Total | ||||||||||||
(in millions) | |||||||||||||||
Three Months Ended September 30, 2016 | |||||||||||||||
Operating revenues | $381.1 | $15.6 | $0.3 | $397.0 | |||||||||||
Operating income (loss) | 118.3 | (2.3 | ) | (1.0 | ) | 115.0 | |||||||||
Earnings available for common stock | 69.0 | ||||||||||||||
Three Months Ended September 30, 2015 | |||||||||||||||
Operating revenues | $367.2 | $14.9 | $0.5 | $382.6 | |||||||||||
Operating income (loss) | 113.4 | (2.8 | ) | (0.3 | ) | 110.3 | |||||||||
Earnings available for common stock | 68.0 | ||||||||||||||
Nine Months Ended September 30, 2016 | |||||||||||||||
Operating revenues | $999.9 | $106.1 | $0.9 | $1,106.9 | |||||||||||
Operating income (loss) | 259.5 | 11.7 | (2.4 | ) | 268.8 | ||||||||||
Earnings available for common stock | 158.7 | ||||||||||||||
Nine Months Ended September 30, 2015 | |||||||||||||||
Operating revenues | $976.9 | $124.0 | $3.5 | $1,104.4 | |||||||||||
Operating income | 244.8 | 13.3 | 1.3 | 259.4 | |||||||||||
Earnings available for common stock | 152.1 |
IPL | WPL | ||||||||||||||||||||||||||||||
Three Months | Nine Months | Three Months | Nine Months | ||||||||||||||||||||||||||||
2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | ||||||||||||||||||||||||
Corporate Services billings | $41 | $38 | $124 | $114 | $33 | $30 | $103 | $90 | |||||||||||||||||||||||
Sales credited | 4 | 2 | 7 | 8 | 3 | 9 | 6 | 21 | |||||||||||||||||||||||
Purchases billed | 126 | 110 | 324 | 278 | 23 | 16 | 65 | 49 |
IPL | WPL | ||||||
September 30, 2016 | December 31, 2015 | September 30, 2016 | December 31, 2015 | ||||
Net payables to Corporate Services | $114 | $93 | $68 | $54 |
Three Months | Nine Months | ||||||||||||||
2016 | 2015 | 2016 | 2015 | ||||||||||||
ATC billings to WPL | $28 | $25 | $82 | $75 | |||||||||||
WPL billings to ATC | 4 | 4 | 10 | 9 |
33 |
Three Months | Nine Months | ||||||||||||||
2016 | 2015 | 2016 | 2015 | ||||||||||||
Operating expenses | $0.6 | $0.3 | $3.3 | $2.3 | |||||||||||
Loss before income taxes | (0.6 | ) | (0.3 | ) | (3.3 | ) | (2.3 | ) | |||||||
Income tax benefit | (0.2 | ) | (0.2 | ) | (1.3 | ) | (0.9 | ) | |||||||
Loss from discontinued operations, net of tax | ($0.4 | ) | ($0.1 | ) | ($2.0 | ) | ($1.4 | ) |
Alliant Energy | |||||
Utilities, ATC and Corporate Services | Non-regulated and Parent | ||||
- Retail electric and gas services in IA (IPL) | - Transportation (AEF) | ||||
- Retail electric and gas services in WI (WPL) | - Non-regulated Generation (AEF) | ||||
- 16% interest in ATC (primarily WPL) | - Parent Company | ||||
- Wholesale electric service in MN, IL & IA (IPL) | |||||
- Wholesale electric service in WI (WPL) | |||||
- Corporate Services |
34 |
2016 | 2015 | ||||||||||||||
Income (Loss) | EPS (a) | Income (Loss) | EPS (a) | ||||||||||||
Continuing operations: | |||||||||||||||
Utilities, ATC and Corporate Services | $186.7 | $0.82 | $187.7 | $0.83 | |||||||||||
Non-regulated and Parent | (57.9 | ) | (0.25 | ) | (7.7 | ) | (0.04 | ) | |||||||
Income from continuing operations | 128.8 | 0.57 | 180.0 | 0.79 | |||||||||||
Loss from discontinued operations | (0.4 | ) | — | (0.1 | ) | — | |||||||||
Net income | $128.4 | $0.57 | $179.9 | $0.79 |
(a) | Amounts reflect the effects of a two-for-one common stock split distributed in May 2016. Refer to Note 6 for additional details. |
• | IPL’s Expansion of Wind Generation - In October 2016, IPL and the Iowa Office of Consumer Advocate, among other customer groups, filed a settlement agreement with the IUB regarding the appropriate rate-making principles for up to 500 MW of additional wind generation at IPL. In October 2016, the IUB issued an order approving the settlement agreement, with limited modifications, and establishing rate-making principles, which IPL accepted, with key terms as follows. Refer to “Strategic Overview” for further discussion. |
▪ | Up to 500 MW of additional wind generation that qualifies for the full level of production tax credits, regardless of the location in Iowa, with a cost cap of $1,830/kilowatt, including AFUDC and transmission costs. Any costs incurred in excess of this $1,830/kilowatt cost cap are expected to be incorporated into rates if determined to be reasonable and prudent. |
▪ | A depreciable life of the wind generation of 40 years, unless changed as a result of a contested case before the IUB. |
▪ | An 11.0% return on common equity, with the exception of certain transmission facilities classified as intangible assets, which would earn the rate of return on common equity the IUB finds reasonable during a future rate case. |
• | Franklin County Wind Farm - In addition to IPL’s expansion of wind generation discussed above, IPL currently anticipates requesting approval from FERC in the fourth quarter of 2016 to transfer the 99 MW Franklin County wind farm from AEF to IPL in 2017. |
• | IPL’s and WPL’s Potential Expansion of Wind Generation - In addition to IPL’s 500 MW expansion of wind generation and planned transfer of the 99 MW Franklin County wind farm to IPL in 2017 discussed above, IPL and WPL are exploring options to own and operate up to 400 MW of additional new wind generation in aggregate. |
• | WPL’s Construction of the Riverside Expansion - In May 2016, WPL received an order from the PSCW authorizing WPL to construct a natural gas-fired combined-cycle EGU in Beloit, Wisconsin, referred to as the Riverside expansion. After receiving the final necessary regulatory approvals and permits in the third quarter of 2016, WPL began constructing the Riverside expansion. WPL currently expects to place the Riverside expansion in service by early 2020. In November 2016, various electric cooperatives notified WPL of their intent to exercise their options to acquire approximately 60 MW of the Riverside expansion while the EGU is being constructed. As a result of the various electric |
35 |
• | WPL’s Wisconsin Retail Electric and Gas Rate Case (2017/2018 Test Period) - In May 2016, WPL filed a retail base rate case with the PSCW based on a forward-looking test period that includes 2017 and 2018. WPL’s filing was based on a stipulated agreement reached between PSCW staff, intervener groups and WPL. The filing requested approval for WPL to implement a $13 million, or approximately 1%, increase in annual rates for WPL’s retail electric customers. Based on updated fuel-related cost information at the time of rate case hearings in September 2016, the current estimate of the net increase in annual rates for WPL’s retail electric customers is $17 million. The filing also requested approval for WPL to implement a $9 million, or approximately 13%, increase in annual base rates for WPL’s retail gas customers. Any rate changes granted from this request are expected to be effective January 1, 2017 and extend through the end of 2018. WPL currently expects a decision from the PSCW regarding this base rate filing in the fourth quarter of 2016. |
• | MISO Transmission Owner Return on Equity Complaints - A group of MISO cooperative and municipal utilities previously filed two complaints with FERC requesting a reduction to the base return on equity used by MISO transmission owners, including ITC and ATC. In September 2016, FERC issued an order on the first complaint and established a base return on equity of 10.32%, excluding any incentive adders granted by FERC, for the refund period from November 12, 2013 through February 11, 2015. In October 2016, in response to MISO’s and the MISO transmission owners’ request, FERC ordered the related refunds be issued by July 2017. In June 2016, a FERC administrative law judge issued an initial decision regarding the second complaint and recommended a base return on equity of 9.70%, excluding any incentive adders granted by FERC, for the refund period from February 12, 2015 through May 11, 2016. A final decision from FERC on the second complaint is currently expected in the first half of 2017. |
• | WPL’s Future Transfer of Investment in ATC - In June 2016, WPL received an order from the PSCW requiring WPL to transfer its investment in ATC to Alliant Energy or an Alliant Energy subsidiary by December 31, 2022. In addition, WPL is required to obtain PSCW approval prior to transferring any additional capital or assets to ATC. Subsequent to WPL transferring its investment in ATC, future contributions to, and equity earnings and dividends from, the investment in ATC would occur at the entity to which the investment in ATC was transferred and would not be reflected in WPL’s consolidated financial statements. As a result, WPL’s earnings and cash flows from operations are expected to decrease subsequent to the transfer. This transfer is not expected to impact Alliant Energy’s consolidated financial statements. |
• | Credit Ratings - In July 2016, Moody’s Investors Service changed Alliant Energy’s and IPL’s corporate/issuer and senior unsecured long-term debt credit ratings from A3 to Baa1. IPL’s preferred stock credit rating also changed from Baa2 to Baa3. In addition, WPL’s corporate/issuer and senior unsecured long-term debt credit ratings changed from A1 to A2. Alliant Energy’s, IPL’s and WPL’s outlooks also changed from negative to stable. Alliant Energy’s, IPL’s and WPL’s commercial paper ratings remained unchanged. These credit ratings changes are not expected to have a material impact on Alliant Energy’s, IPL’s, and WPL’s liquidity or collateral obligations. |
• | Common Stock Split - In April 2016, Alliant Energy’s Board of Directors approved a two-for-one common stock split and a proportionate increase in the number of authorized shares of common stock of Alliant Energy from 240 million shares to 480 million shares to implement the stock split. Alliant Energy shareowners of record at the close of business on May 4, 2016 received one additional share of Alliant Energy common stock for each share held on that date. The proportionate interest that a shareowner owns in Alliant Energy did not change as a result of the stock split. The additional shares were distributed on May 19, 2016 and post-split trading began on May 20, 2016. All Alliant Energy share and per share amounts in this report have been reflected on a post-split basis. |
• | Financing Plans - Alliant Energy currently expects to issue up to $150 million of common stock in 2017 through one or more offerings and its Shareowner Direct Plan. IPL and WPL currently expect to receive capital contributions of approximately $150 million and $90 million, respectively, from their parent company, Alliant Energy, in 2017. IPL and WPL currently expect to issue up to $250 million and $300 million, respectively, of long-term debt securities in 2017. |
• | Common Stock Dividends - Alliant Energy announced an increase in its targeted 2017 annual common stock dividend to $1.26 per share, which is equivalent to a quarterly rate of $0.315 per share, beginning with the February 2017 dividend payment. The timing and amount of future dividends is subject to an approved dividend declaration from Alliant Energy’s Board of Directors, and is dependent upon earnings expectations, capital requirements, and general financial business conditions, among other factors. In addition, IPL and WPL currently expect to pay common stock dividends of $156 million and $126 million, respectively, to their parent company in 2017. |
36 |
• | Electric Transmission Service Expense - Alliant Energy currently expects a decrease in electric transmission service expense in 2017 compared to 2016 primarily due to expected lower return on equity resulting from the MISO transmission owner return on equity complaints. Alliant Energy’s estimated 2017 electric transmission service expense remains subject to change pending the IUB’s approval of IPL’s 2017 transmission rates and the PSCW’s final decision in WPL’s retail electric rate case for the 2017/2018 Test Period. Based on IPL’s and WPL’s electric transmission cost recovery mechanisms, IPL and WPL currently do not expect that any changes to electric transmission service costs billed by ITC and ATC will have a material impact on their financial condition and results of operations. IPL and WPL could have a material impact on their cash flows depending on the final timing of refunds resulting from the MISO return on equity complaints, and the subsequent timing of the refunds being credited to their customers. |
Alliant Energy | Revenues and Costs (dollars in millions) | MWhs Sold (MWhs in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential (a) | $313.5 | $303.2 | 3 | % | 2,091 | 2,047 | 2 | % | |||||||||||
Commercial (a) | 212.8 | 200.3 | 6 | % | 1,771 | 1,694 | 5 | % | |||||||||||
Industrial - IPL co-generation customers | 15.4 | 16.9 | (9 | %) | 218 | 242 | (10 | %) | |||||||||||
Industrial - other (a) | 230.8 | 227.0 | 2 | % | 2,855 | 2,849 | — | % | |||||||||||
Retail subtotal (a) | 772.5 | 747.4 | 3 | % | 6,935 | 6,832 | 2 | % | |||||||||||
Sales for resale: | |||||||||||||||||||
Wholesale (a) | 73.0 | 66.6 | 10 | % | 1,120 | 1,028 | 9 | % | |||||||||||
Bulk power and other | 4.5 | 9.5 | (53 | %) | 151 | 378 | (60 | %) | |||||||||||
Other | 14.3 | 12.3 | 16 | % | 24 | 28 | (14 | %) | |||||||||||
Total revenues/sales | 864.3 | 835.8 | 3 | % | 8,230 | 8,266 | — | % | |||||||||||
Electric production fuel expense | 139.1 | 155.7 | (11 | %) | |||||||||||||||
Purchased power expense | 106.8 | 90.1 | 19 | % | |||||||||||||||
Electric transmission service expense | 138.6 | 127.6 | 9 | % | |||||||||||||||
Electric margins (b) | $479.8 | $462.4 | 4 | % |
37 |
IPL | Revenues and Costs (dollars in millions) | MWhs Sold (MWhs in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential (a) | $173.7 | $173.7 | — | % | 1,062 | 1,081 | (2 | %) | |||||||||||
Commercial (a) | 133.1 | 126.5 | 5 | % | 1,092 | 1,053 | 4 | % | |||||||||||
Industrial - IPL co-generation customers | 15.4 | 16.9 | (9 | %) | 218 | 242 | (10 | %) | |||||||||||
Industrial - other (a) | 121.5 | 121.3 | — | % | 1,526 | 1,540 | (1 | %) | |||||||||||
Retail subtotal (a) | 443.7 | 438.4 | 1 | % | 3,898 | 3,916 | — | % | |||||||||||
Sales for resale: | |||||||||||||||||||
Wholesale (a) | 28.1 | 20.4 | 38 | % | 366 | 275 | 33 | % | |||||||||||
Bulk power and other | 1.4 | 1.1 | 27 | % | 23 | 28 | (18 | %) | |||||||||||
Other | 10.0 | 8.7 | 15 | % | 11 | 14 | (21 | %) | |||||||||||
Total revenues/sales | 483.2 | 468.6 | 3 | % | 4,298 | 4,233 | 2 | % | |||||||||||
Electric production fuel expense | 54.7 | 72.0 | (24 | %) | |||||||||||||||
Purchased power expense | 70.3 | 59.4 | 18 | % | |||||||||||||||
Electric transmission service expense | 95.9 | 87.5 | 10 | % | |||||||||||||||
Electric margins (b) | $262.3 | $249.7 | 5 | % |
WPL | Revenues and Costs (dollars in millions) | MWhs Sold (MWhs in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential | $139.8 | $129.5 | 8 | % | 1,029 | 966 | 7 | % | |||||||||||
Commercial | 79.7 | 73.8 | 8 | % | 679 | 641 | 6 | % | |||||||||||
Industrial | 109.3 | 105.7 | 3 | % | 1,329 | 1,309 | 2 | % | |||||||||||
Retail subtotal | 328.8 | 309.0 | 6 | % | 3,037 | 2,916 | 4 | % | |||||||||||
Sales for resale: | |||||||||||||||||||
Wholesale | 44.9 | 46.2 | (3 | %) | 754 | 753 | — | % | |||||||||||
Bulk power and other | 3.1 | 8.4 | (63 | %) | 128 | 350 | (63 | %) | |||||||||||
Other | 4.3 | 3.6 | 19 | % | 13 | 14 | (7 | %) | |||||||||||
Total revenues/sales | 381.1 | 367.2 | 4 | % | 3,932 | 4,033 | (3 | %) | |||||||||||
Electric production fuel expense | 84.4 | 83.7 | 1 | % | |||||||||||||||
Purchased power expense | 36.5 | 30.7 | 19 | % | |||||||||||||||
Electric transmission service expense | 42.7 | 40.1 | 6 | % | |||||||||||||||
Electric margins | $217.5 | $212.7 | 2 | % |
(a) | On July 31, 2015, IPL sold its electric distribution assets in Minnesota to Southern Minnesota Energy Cooperative. Prior to the asset sale, the electric sales to retail customers are included in residential, commercial and industrial sales. Subsequent to the asset sale, the related electric sales are included in wholesale electric sales pursuant to the wholesale power supply agreement between IPL and Southern Minnesota Energy Cooperative. |
(b) | Includes $17 million and $20 million of credits on IPL’s Iowa retail electric customers’ bills for the third quarters of 2016 and 2015, respectively, resulting from the electric tax benefit rider. The electric tax benefit rider results in reductions in electric revenues that are offset by reductions in income tax expense for the years ended December 31, 2016 and 2015. |
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Alliant Energy | Revenues and Costs (dollars in millions) | MWhs Sold (MWhs in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential (a) | $779.9 | $775.7 | 1 | % | 5,518 | 5,679 | (3 | %) | |||||||||||
Commercial (a) | 543.0 | 512.9 | 6 | % | 4,904 | 4,816 | 2 | % | |||||||||||
Industrial - IPL co-generation customers | 48.2 | 45.5 | 6 | % | 704 | 700 | 1 | % | |||||||||||
Industrial - other (a) | 599.3 | 588.8 | 2 | % | 8,013 | 8,217 | (2 | %) | |||||||||||
Retail subtotal (a) | 1,970.4 | 1,922.9 | 2 | % | 19,139 | 19,412 | (1 | %) | |||||||||||
Sales for resale: | |||||||||||||||||||
Wholesale (a) | 196.7 | 165.5 | 19 | % | 3,025 | 2,663 | 14 | % | |||||||||||
Bulk power and other | 8.2 | 24.2 | (66 | %) | 347 | 1,051 | (67 | %) | |||||||||||
Other | 33.8 | 34.9 | (3 | %) | 75 | 102 | (26 | %) | |||||||||||
Total revenues/sales | 2,209.1 | 2,147.5 | 3 | % | 22,586 | 23,228 | (3 | %) | |||||||||||
Electric production fuel expense | 325.8 | 376.3 | (13 | %) | |||||||||||||||
Purchased power expense | 320.5 | 270.6 | 18 | % | |||||||||||||||
Electric transmission service expense | 396.8 | 367.7 | 8 | % | |||||||||||||||
Electric margins (b) | $1,166.0 | $1,132.9 | 3 | % |
IPL | Revenues and Costs (dollars in millions) | MWhs Sold (MWhs in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential (a) | $422.2 | $434.8 | (3 | %) | 2,827 | 3,055 | (7 | %) | |||||||||||
Commercial (a) | 336.1 | 318.9 | 5 | % | 3,076 | 3,043 | 1 | % | |||||||||||
Industrial - IPL co-generation customers | 48.2 | 45.5 | 6 | % | 704 | 700 | 1 | % | |||||||||||
Industrial - other (a) | 304.3 | 307.6 | (1 | %) | 4,337 | 4,591 | (6 | %) | |||||||||||
Retail subtotal (a) | 1,110.8 | 1,106.8 | — | % | 10,944 | 11,389 | (4 | %) | |||||||||||
Sales for resale: | |||||||||||||||||||
Wholesale (a) | 72.7 | 35.6 | 104 | % | 1,012 | 509 | 99 | % | |||||||||||
Bulk power and other | 2.8 | 4.0 | (30 | %) | 44 | 163 | (73 | %) | |||||||||||
Other | 22.9 | 24.2 | (5 | %) | 31 | 54 | (43 | %) | |||||||||||
Total revenues/sales | 1,209.2 | 1,170.6 | 3 | % | 12,031 | 12,115 | (1 | %) | |||||||||||
Electric production fuel expense | 120.6 | 162.6 | (26 | %) | |||||||||||||||
Purchased power expense | 204.2 | 169.4 | 21 | % | |||||||||||||||
Electric transmission service expense | 270.7 | 249.3 | 9 | % | |||||||||||||||
Electric margins (b) | $613.7 | $589.3 | 4 | % |
WPL | Revenues and Costs (dollars in millions) | MWhs Sold (MWhs in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential | $357.7 | $340.9 | 5 | % | 2,691 | 2,624 | 3 | % | |||||||||||
Commercial | 206.9 | 194.0 | 7 | % | 1,828 | 1,773 | 3 | % | |||||||||||
Industrial | 295.0 | 281.2 | 5 | % | 3,676 | 3,626 | 1 | % | |||||||||||
Retail subtotal | 859.6 | 816.1 | 5 | % | 8,195 | 8,023 | 2 | % | |||||||||||
Sales for resale: | |||||||||||||||||||
Wholesale | 124.0 | 129.9 | (5 | %) | 2,013 | 2,154 | (7 | %) | |||||||||||
Bulk power and other | 5.4 | 20.2 | (73 | %) | 303 | 888 | (66 | %) | |||||||||||
Other | 10.9 | 10.7 | 2 | % | 44 | 48 | (8 | %) | |||||||||||
Total revenues/sales | 999.9 | 976.9 | 2 | % | 10,555 | 11,113 | (5 | %) | |||||||||||
Electric production fuel expense | 205.2 | 213.7 | (4 | %) | |||||||||||||||
Purchased power expense | 116.3 | 101.2 | 15 | % | |||||||||||||||
Electric transmission service expense | 126.1 | 118.4 | 7 | % | |||||||||||||||
Electric margins | $552.3 | $543.6 | 2 | % |
39 |
(a) | On July 31, 2015, IPL sold its electric distribution assets in Minnesota. Prior to the asset sale, the electric sales to retail customers are included in residential, commercial and industrial sales. Subsequent to the asset sale, the related electric sales are included in wholesale electric sales pursuant to the wholesale power supply agreement between IPL and Southern Minnesota Energy Cooperative. |
(b) | Includes $47 million and $55 million of credits on Iowa retail electric customers’ bills for the nine months ended September 30, 2016 and 2015, respectively, resulting from IPL’s electric tax benefit rider. The electric tax benefit rider results in reductions in electric revenues that are offset by reductions in income tax expense for the years ended December 31, 2016 and 2015. |
Three Months | Nine Months | ||||||||||||||||||||||
Alliant Energy | IPL | WPL | Alliant Energy | IPL | WPL | ||||||||||||||||||
Retail electric customer billing credits at IPL (Refer to Note 2 for further details) | $4 | $4 | $— | $12 | $12 | $— | |||||||||||||||||
Estimated changes in sales caused by temperatures | 12 | 9 | 3 | 10 | 9 | 1 | |||||||||||||||||
Higher revenues at IPL due to changes in credits on Iowa retail electric customers’ bills resulting from the electric tax benefit rider (Refer to Note 2 for further details) | 3 | 3 | — | 8 | 8 | — | |||||||||||||||||
Higher retail electric sales due to one additional day in 2016 for leap year | — | — | — | 4 | 2 | 2 | |||||||||||||||||
Other | (2 | ) | (3 | ) | 2 | (1 | ) | (7 | ) | 6 | |||||||||||||
$17 | $13 | $5 | $33 | $24 | $9 |
Three Months | Nine Months | ||||||||||||||||
Actual | Actual | ||||||||||||||||
2016 | 2015 | Normal | 2016 | 2015 | Normal | ||||||||||||
HDD: | |||||||||||||||||
Cedar Rapids, Iowa (IPL) | 39 | 83 | 142 | 3,759 | 4,355 | 4,276 | |||||||||||
Madison, Wisconsin (WPL) | 49 | 98 | 175 | 4,135 | 4,653 | 4,529 | |||||||||||
CDD: | |||||||||||||||||
Cedar Rapids, Iowa (IPL) | 651 | 530 | 534 | 948 | 730 | 754 | |||||||||||
Madison, Wisconsin (WPL) | 570 | 503 | 474 | 771 | 664 | 655 |
2016 | 2015 | Resulting Impact in 2016 Compared to 2015 | |||
First quarter (HDD) | 10% warmer than normal | 10% colder than normal | Decrease in IPL’s and WPL’s electric and gas sales due to lower demand by customers for heating | ||
Second quarter (CDD) | 10% - 35% warmer than normal | 10% colder than normal | Increase in IPL’s and WPL’s electric sales due to higher demand by customers for air cooling | ||
Third quarter (CDD) | 20% warmer than normal | Normal | Increase in IPL’s and WPL’s electric sales due to higher demand by customers for air cooling |
Three Months | Nine Months | ||||||||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||||||
IPL | $7 | ($2 | ) | $9 | $7 | ($2 | ) | $9 | |||||||||||||||
WPL | 4 | 1 | 3 | 3 | 2 | 1 | |||||||||||||||||
Total Alliant Energy | $11 | ($1 | ) | $12 | $10 | $— | $10 |
40 |
41 |
Alliant Energy | Revenues and Costs (dollars in millions) | Dths Sold (Dths in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential | $17.8 | $17.6 | 1 | % | 1,397 | 1,204 | 16 | % | |||||||||||
Commercial | 10.6 | 11.0 | (4 | %) | 1,972 | 1,616 | 22 | % | |||||||||||
Industrial | 2.5 | 2.4 | 4 | % | 557 | 541 | 3 | % | |||||||||||
Retail subtotal | 30.9 | 31.0 | — | % | 3,926 | 3,361 | 17 | % | |||||||||||
Transportation/other | 8.6 | 7.0 | 23 | % | 20,302 | 18,772 | 8 | % | |||||||||||
Total revenues/sales | 39.5 | 38.0 | 4 | % | 24,228 | 22,133 | 9 | % | |||||||||||
Cost of gas sold | 12.5 | 13.6 | (8 | %) | |||||||||||||||
Gas margins (a) | $27.0 | $24.4 | 11 | % |
IPL | Revenues and Costs (dollars in millions) | Dths Sold (Dths in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential | $10.3 | $10.3 | — | % | 799 | 638 | 25 | % | |||||||||||
Commercial | 6.6 | 6.8 | (3 | %) | 1,245 | 854 | 46 | % | |||||||||||
Industrial | 2.0 | 2.0 | — | % | 442 | 442 | — | % | |||||||||||
Retail subtotal | 18.9 | 19.1 | (1 | %) | 2,486 | 1,934 | 29 | % | |||||||||||
Transportation/other | 5.0 | 4.0 | 25 | % | 8,783 | 7,819 | 12 | % | |||||||||||
Total revenues/sales | 23.9 | 23.1 | 3 | % | 11,269 | 9,753 | 16 | % | |||||||||||
Cost of gas sold | 8.0 | 9.4 | (15 | %) | |||||||||||||||
Gas margins (a) | $15.9 | $13.7 | 16 | % |
WPL | Revenues and Costs (dollars in millions) | Dths Sold (Dths in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential | $7.5 | $7.3 | 3 | % | 598 | 566 | 6 | % | |||||||||||
Commercial | 4.0 | 4.2 | (5 | %) | 727 | 762 | (5 | %) | |||||||||||
Industrial | 0.5 | 0.4 | 25 | % | 115 | 99 | 16 | % | |||||||||||
Retail subtotal | 12.0 | 11.9 | 1 | % | 1,440 | 1,427 | 1 | % | |||||||||||
Transportation/other | 3.6 | 3.0 | 20 | % | 11,519 | 10,953 | 5 | % | |||||||||||
Total revenues/sales | 15.6 | 14.9 | 5 | % | 12,959 | 12,380 | 5 | % | |||||||||||
Cost of gas sold | 4.5 | 4.2 | 7 | % | |||||||||||||||
Gas margins | $11.1 | $10.7 | 4 | % |
(a) | Includes $3 million of credits on IPL’s Iowa retail gas customers’ bills for both the third quarters of 2016 and 2015 resulting from the gas tax benefit rider. The gas tax benefit rider results in reductions in gas revenues that are offset by reductions in income tax expense for the years ended December 31, 2016 and 2015. |
42 |
Alliant Energy | Revenues and Costs (dollars in millions) | Dths Sold (Dths in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential | $135.7 | $162.1 | (16 | %) | 17,317 | 19,475 | (11 | %) | |||||||||||
Commercial | 77.1 | 91.3 | (16 | %) | 13,194 | 13,879 | (5 | %) | |||||||||||
Industrial | 10.1 | 10.4 | (3 | %) | 2,209 | 2,092 | 6 | % | |||||||||||
Retail subtotal | 222.9 | 263.8 | (16 | %) | 32,720 | 35,446 | (8 | %) | |||||||||||
Transportation/other | 25.8 | 24.3 | 6 | % | 61,615 | 57,213 | 8 | % | |||||||||||
Total revenues/sales | 248.7 | 288.1 | (14 | %) | 94,335 | 92,659 | 2 | % | |||||||||||
Cost of gas sold | 132.3 | 166.3 | (20 | %) | |||||||||||||||
Gas margins (a) | $116.4 | $121.8 | (4 | %) |
IPL | Revenues and Costs (dollars in millions) | Dths Sold (Dths in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential | $76.5 | $90.9 | (16 | %) | 9,477 | 10,709 | (12 | %) | |||||||||||
Commercial | 43.7 | 50.7 | (14 | %) | 7,119 | 7,335 | (3 | %) | |||||||||||
Industrial | 7.0 | 7.6 | (8 | %) | 1,501 | 1,562 | (4 | %) | |||||||||||
Retail subtotal | 127.2 | 149.2 | (15 | %) | 18,097 | 19,606 | (8 | %) | |||||||||||
Transportation/other | 15.4 | 14.9 | 3 | % | 27,066 | 25,962 | 4 | % | |||||||||||
Total revenues/sales | 142.6 | 164.1 | (13 | %) | 45,163 | 45,568 | (1 | %) | |||||||||||
Cost of gas sold | 76.3 | 93.4 | (18 | %) | |||||||||||||||
Gas margins (a) | $66.3 | $70.7 | (6 | %) |
WPL | Revenues and Costs (dollars in millions) | Dths Sold (Dths in thousands) | |||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||
Residential | $59.2 | $71.2 | (17 | %) | 7,840 | 8,766 | (11 | %) | |||||||||||
Commercial | 33.4 | 40.6 | (18 | %) | 6,075 | 6,544 | (7 | %) | |||||||||||
Industrial | 3.1 | 2.8 | 11 | % | 708 | 530 | 34 | % | |||||||||||
Retail subtotal | 95.7 | 114.6 | (16 | %) | 14,623 | 15,840 | (8 | %) | |||||||||||
Transportation/other | 10.4 | 9.4 | 11 | % | 34,549 | 31,251 | 11 | % | |||||||||||
Total revenues/sales | 106.1 | 124.0 | (14 | %) | 49,172 | 47,091 | 4 | % | |||||||||||
Cost of gas sold | 56.0 | 72.9 | (23 | %) | |||||||||||||||
Gas margins | $50.1 | $51.1 | (2 | %) |
(a) | Includes $9 million of credits on IPL’s Iowa retail gas customers’ bills for both the nine months ended September 30, 2016 and 2015 resulting from the gas tax benefit rider. The gas tax benefit rider results in reductions in gas revenues that are offset by reductions in income tax expense for the years ended December 31, 2016 and 2015. |
Three Months | Nine Months | ||||||||||||||||||||||
Alliant Energy | IPL | WPL | Alliant Energy | IPL | WPL | ||||||||||||||||||
Estimated changes in sales caused by temperatures | $— | $— | $— | ($5 | ) | ($3 | ) | ($2 | ) | ||||||||||||||
Higher (lower) revenues at IPL related to changes in recovery amounts for energy efficiency costs through the energy efficiency rider (a) | 1 | 1 | — | (3 | ) | (3 | ) | — | |||||||||||||||
Other | 2 | 1 | — | 3 | 2 | 1 | |||||||||||||||||
$3 | $2 | $— | ($5 | ) | ($4 | ) | ($1 | ) |
(a) | Changes in gas energy efficiency revenues were offset by changes in energy efficiency expense included in other operation and maintenance expenses. |
43 |
Three Months | Nine Months | ||||||||||||||||||||||
2016 | 2015 | Change | 2016 | 2015 | Change | ||||||||||||||||||
IPL | $— | $— | $— | ($2 | ) | $1 | ($3 | ) | |||||||||||||||
WPL | (1 | ) | (1 | ) | — | (2 | ) | — | (2 | ) | |||||||||||||
Total Alliant Energy | ($1 | ) | ($1 | ) | $— | ($4 | ) | $1 | ($5 | ) |
Three Months | Nine Months | ||||||||||||||||||||||
Alliant Energy | IPL | WPL | Alliant Energy | IPL | WPL | ||||||||||||||||||
Losses on sales of IPL’s Minnesota distribution assets recorded in the second quarter of 2015 (Refer to Note 3 for further details) | $— | $— | $— | ($12 | ) | ($12 | ) | $— | |||||||||||||||
Lower energy efficiency cost recovery amortizations at WPL (a) | (4 | ) | — | (4 | ) | (11 | ) | — | (11 | ) | |||||||||||||
Voluntary employee separation charges in the third quarter of 2015 (Refer to Note 9(a) for further details) | (8 | ) | (5 | ) | (3 | ) | (8 | ) | (5 | ) | (3 | ) | |||||||||||
Changes in energy efficiency expense at IPL (b) | — | — | — | (4 | ) | (4 | ) | — | |||||||||||||||
Higher stock-based performance compensation expense | 4 | 2 | 2 | 11 | 6 | 5 | |||||||||||||||||
Higher employee benefits-related expense | 2 | 1 | 1 | 5 | 4 | 1 | |||||||||||||||||
Other | 3 | 3 | 1 | 1 | 3 | (3 | ) | ||||||||||||||||
($3 | ) | $1 | ($3 | ) | ($18 | ) | ($8 | ) | ($11 | ) |
(a) | The July 2014 PSCW order for WPL’s 2015/2016 Test Period electric and gas base rate case authorized lower energy efficiency cost recovery amortizations for 2015 and 2016. |
(b) | Changes in IPL’s energy efficiency expense were offset by changes in gas energy efficiency revenues. |
Three Months | Nine Months | ||||||||||||||||||||||
Alliant Energy | IPL | WPL | Alliant Energy | IPL | WPL | ||||||||||||||||||
Higher amortization expense from the new customer billing and information system placed in service in 2015 | $3 | $2 | $1 | $7 | $4 | $3 | |||||||||||||||||
Lower depreciation expense from the sale of IPL’s Minnesota distribution assets in 2015 | — | — | — | (3 | ) | (3 | ) | — | |||||||||||||||
Other (includes the impact of property additions) | 2 | — | 2 | 5 | 2 | 3 | |||||||||||||||||
$5 | $2 | $3 | $9 | $3 | $6 |
44 |
Three Months | Nine Months | ||||||||||||||||||||||
Alliant Energy | IPL | WPL | Alliant Energy | IPL | WPL | ||||||||||||||||||
Marshalltown (IPL) | $5 | $5 | $— | $17 | $17 | $— | |||||||||||||||||
Other | 1 | 2 | — | 2 | — | 2 | |||||||||||||||||
$6 | $7 | $— | $19 | $17 | $2 |
45 |
• | Up to 500 MW of additional wind generation that qualifies for the full level of production tax credits, regardless of the location in Iowa, with a cost cap of $1,830/kilowatt, including AFUDC and transmission costs. Any costs incurred in excess of this $1,830/kilowatt cost cap are expected to be incorporated into rates if determined to be reasonable and prudent. |
• | A depreciable life of the wind generation of 40 years, unless changed as a result of a contested case before the IUB. |
• | An 11.0% return on common equity, with the exception of certain transmission facilities classified as intangible assets, which would earn the rate of return on common equity the IUB finds reasonable during a future rate case. |
• | A return on common equity for the calculation of AFUDC during the construction period that is the greater of 10.0% or the percentage the IUB finds reasonable during IPL’s next rate case. |
• | The application of double leverage is deferred until IPL’s next retail electric base rate case or other future proceeding. |
• | Amortization over a 10-year period of IPL’s prudently incurred and unreimbursed costs, effective with IPL’s next retail electric base rate case, if IPL cancels the construction of the wind generation. |
• | Withdrawal of IPL’s proposed renewable energy rider, which would have allowed IPL to commence recovery of the wind projects from its retail electric customers at the time the additional wind generation was placed in service. |
46 |
Utility | Test | Regulatory Capital Structure | After-tax | Average Retail Rate | ||||||||||
Type | Period | CE | LD | SD | WACC | Base (in millions) (a) | ||||||||
Electric | 2017 | 52.23% | 43.92% | 3.85% | 7.57% | $2,699 | ||||||||
Electric | 2018 | 52.20% | 45.16% | 2.64% | 7.59% | 2,851 | ||||||||
Gas | 2017 | 52.23% | 43.92% | 3.85% | 7.57% | 259 | ||||||||
Gas | 2018 | 52.20% | 45.16% | 2.64% | 7.59% | 284 |
(a) | Average rate base is calculated using a 13-month average. |
47 |
Alliant Energy (Consolidated) | IPL | WPL | ||||||||||||||||||
Common equity | $3,859.1 | 46 | % | $2,137.9 | 48 | % | $1,813.8 | 54 | % | |||||||||||
Preferred stock of IPL | 200.0 | 2 | % | 200.0 | 4 | % | — | — | % | |||||||||||
Noncontrolling interest | — | — | % | — | — | % | 18.5 | 1 | % | |||||||||||
Long-term debt (incl. current maturities) | 4,130.9 | 49 | % | 2,153.1 | 48 | % | 1,534.9 | 45 | % | |||||||||||
Short-term debt | 238.3 | 3 | % | — | — | % | 11.8 | — | % | |||||||||||
$8,428.3 | 100 | % | $4,491.0 | 100 | % | $3,379.0 | 100 | % |
Alliant Energy | IPL | WPL | |||||||||||||||||||||
2016 | 2015 | 2016 | 2015 | 2016 | 2015 | ||||||||||||||||||
Cash and cash equivalents, January 1 | $5.8 | $56.9 | $4.5 | $5.3 | $0.4 | $46.7 | |||||||||||||||||
Cash flows from (used for): | |||||||||||||||||||||||
Operating activities | 654.0 | 695.3 | 256.5 | 318.0 | 439.3 | 375.9 | |||||||||||||||||
Investing activities | (771.8 | ) | (613.0 | ) | (435.4 | ) | (319.4 | ) | (326.7 | ) | (259.6 | ) | |||||||||||
Financing activities | 196.7 | — | 252.1 | 95.5 | (107.4 | ) | (127.3 | ) | |||||||||||||||
Net increase (decrease) | 78.9 | 82.3 | 73.2 | 94.1 | 5.2 | (11.0 | ) | ||||||||||||||||
Cash and cash equivalents, September 30 | $84.7 | $139.2 | $77.7 | $99.4 | $5.6 | $35.7 |
48 |
Alliant Energy | IPL | WPL | |||||||||
Changes in cash collateral balances | ($29 | ) | $— | $— | |||||||
Changes in levels of gas stored underground and prepaid gas costs | (20 | ) | (10 | ) | (10 | ) | |||||
Changes in income taxes paid/refunded | (8 | ) | (30 | ) | 30 | ||||||
Timing of WPL’s fuel-related cost recoveries from customers | 25 | — | 25 | ||||||||
Changes in levels of production fuel | 10 | (12 | ) | 22 | |||||||
Other | (19 | ) | (10 | ) | (4 | ) | |||||
($41 | ) | ($62 | ) | $63 |
Alliant Energy | IPL | WPL | |||||||||
Proceeds from IPL’s Minnesota distribution asset sales in 2015 | ($138 | ) | ($138 | ) | $— | ||||||
Higher utility construction expenditures | (65 | ) | (4 | ) | (61 | ) | |||||
Proceeds from the liquidation of company-owned life insurance policies | 31 | 19 | — | ||||||||
Other | 13 | 7 | (6 | ) | |||||||
($159 | ) | ($116 | ) | ($67 | ) |
Alliant Energy | IPL | WPL | |||||||||||||||||||||||||||||||||||||||||||||
2016 | 2017 | 2018 | 2019 | 2020 | 2016 | 2017 | 2018 | 2019 | 2020 | 2016 | 2017 | 2018 | 2019 | 2020 | |||||||||||||||||||||||||||||||||
Generation: | |||||||||||||||||||||||||||||||||||||||||||||||
Renewable projects | $100 | $140 | $345 | $340 | $325 | $70 | $175 | $325 | $270 | $115 | $30 | $— | $20 | $70 | $210 | ||||||||||||||||||||||||||||||||
Riverside expansion | 75 | 295 | 180 | 85 | 5 | — | — | — | — | — | 75 | 295 | 180 | 85 | 5 | ||||||||||||||||||||||||||||||||
Marshalltown | 185 | 20 | — | — | — | 185 | 20 | — | — | — | — | — | — | — | — | ||||||||||||||||||||||||||||||||
Other | 270 | 235 | 185 | 180 | 160 | 90 | 115 | 105 | 105 | 80 | 180 | 120 | 80 | 75 | 80 | ||||||||||||||||||||||||||||||||
Distribution: | |||||||||||||||||||||||||||||||||||||||||||||||
Electric systems | 305 | 425 | 440 | 475 | 475 | 175 | 230 | 255 | 285 | 295 | 130 | 195 | 185 | 190 | 180 | ||||||||||||||||||||||||||||||||
Gas systems | 170 | 110 | 145 | 100 | 220 | 120 | 70 | 75 | 60 | 160 | 50 | 40 | 70 | 40 | 60 | ||||||||||||||||||||||||||||||||
Other | 105 | 155 | 120 | 100 | 100 | 35 | 40 | 35 | 25 | 25 | 20 | 15 | 10 | 10 | 10 | ||||||||||||||||||||||||||||||||
$1,210 | $1,380 | $1,415 | $1,280 | $1,285 | $675 | $650 | $795 | $745 | $675 | $485 | $665 | $545 | $470 | $545 |
49 |
Alliant Energy | IPL | WPL | |||||||||
Proceeds from the issuance of IPL’s 3.7% senior debentures in September 2016 | $300 | $300 | $— | ||||||||
Payments to retire IPL’s 3.3% senior debentures in June 2015 | 150 | 150 | — | ||||||||
Net changes in the amount of commercial paper outstanding | 111 | — | (8 | ) | |||||||
Payments to retire WPL’s pollution control revenue bonds in the third quarter of 2015 | 31 | — | 31 | ||||||||
Proceeds from the issuance of IPL’s 3.4% senior debentures in August 2015 | (250 | ) | (250 | ) | — | ||||||
Proceeds from Alliant Energy’s at-the-market offering program in 2015 | (133 | ) | — | — | |||||||
Lower capital contributions from IPL’s parent company, Alliant Energy | — | (35 | ) | — | |||||||
Other | (12 | ) | (8 | ) | (3 | ) | |||||
$197 | $157 | $20 |
50 |
51 |
52 |
Total Number | Average Price | Total Number of Shares | Maximum Number (or Approximate | ||||||||
of Shares | Paid Per | Purchased as Part of | Dollar Value) of Shares That May Yet | ||||||||
Period | Purchased (a) | Share | Publicly Announced Plan | Be Purchased Under the Plan (a) | |||||||
July 1 through July 31 | 3,751 | $39.36 | — | N/A | |||||||
August 1 through August 31 | 3,372 | 38.93 | — | N/A | |||||||
September 1 through September 30 | 92 | 38.57 | — | N/A | |||||||
7,215 | 39.15 | — |
(a) | All shares were purchased on the open market and held in a rabbi trust under the Alliant Energy Deferred Compensation Plan. There is no limit on the number of shares of Alliant Energy common stock that may be held under the Deferred Compensation Plan, which currently does not have an expiration date. |
53 |
ALLIANT ENERGY CORPORATION | |
Registrant | |
By: /s/ Robert J. Durian | Vice President, Chief Accounting Officer and Treasurer |
Robert J. Durian | (Principal Accounting Officer and Authorized Signatory) |
INTERSTATE POWER AND LIGHT COMPANY | |
Registrant | |
By: /s/ Robert J. Durian | Vice President, Chief Accounting Officer and Treasurer |
Robert J. Durian | (Principal Accounting Officer and Authorized Signatory) |
WISCONSIN POWER AND LIGHT COMPANY | |
Registrant | |
By: /s/ Robert J. Durian | Vice President, Chief Accounting Officer and Treasurer |
Robert J. Durian | (Principal Accounting Officer and Authorized Signatory) |
54 |
Exhibit Number | Description | |
4.1 | Officer’s Certificate, dated as of September 15, 2016, creating IPL’s 3.70% Senior Debentures due September 15, 2046 (incorporated by reference to Exhibit 4.1 to IPL’s Form 8-K, filed September 15, 2016 (File No. 1-4117)) | |
10.1 | Term Loan Credit Agreement, dated as of October 7, 2016, among AEF, Alliant Energy, JPMorgan Chase Bank, N.A. and the lender parties set forth therein (incorporated by reference to Exhibit 10.1 to Alliant Energy’s Form 8-K, filed October 7, 2016 (File No. 1-9894)) | |
12.1 | Ratio of Earnings to Fixed Charges for Alliant Energy | |
12.2 | Ratio of Earnings to Fixed Charges and Ratio of Earnings to Combined Fixed Charges and Preferred Dividend Requirements for IPL | |
12.3 | Ratio of Earnings to Fixed Charges for WPL | |
31.1 | Certification of the Chairman, President and CEO for Alliant Energy | |
31.2 | Certification of the Senior Vice President and CFO for Alliant Energy | |
31.3 | Certification of the Chairman and CEO for IPL | |
31.4 | Certification of the Senior Vice President and CFO for IPL | |
31.5 | Certification of the Chairman and CEO for WPL | |
31.6 | Certification of the Senior Vice President and CFO for WPL | |
32.1 | Written Statement of the CEO and CFO Pursuant to 18 U.S.C.§1350 for Alliant Energy | |
32.2 | Written Statement of the CEO and CFO Pursuant to 18 U.S.C.§1350 for IPL | |
32.3 | Written Statement of the CEO and CFO Pursuant to 18 U.S.C.§1350 for WPL | |
101.INS* | XBRL Instance Document | |
101.SCH* | XBRL Taxonomy Extension Schema Document | |
101.CAL* | XBRL Taxonomy Extension Calculation Linkbase Document | |
101.LAB* | XBRL Taxonomy Extension Label Linkbase Document | |
101.PRE* | XBRL Taxonomy Extension Presentation Linkbase Document | |
101.DEF* | XBRL Taxonomy Extension Definition Linkbase Document |
55 |
Nine Months Ended | |||||||||||||||||||||||
September 30, | Years Ended December 31, | ||||||||||||||||||||||
2016 | 2015 | 2015 | 2014 | 2013 | 2012 | 2011 | |||||||||||||||||
(dollars in millions) | |||||||||||||||||||||||
EARNINGS: | |||||||||||||||||||||||
Net income from continuing operations attributable to Alliant Energy Corporation common shareowners | $310.8 | $345.5 | $380.7 | $385.5 | $364.2 | $324.9 | $323.1 | ||||||||||||||||
Income taxes (a) | 47.2 | 59.5 | 70.4 | 44.3 | 53.9 | 89.4 | 69.2 | ||||||||||||||||
Subtotal | 358.0 | 405.0 | 451.1 | 429.8 | 418.1 | 414.3 | 392.3 | ||||||||||||||||
Fixed charges as defined | 156.0 | 151.5 | 202.3 | 195.7 | 189.0 | 208.0 | 208.4 | ||||||||||||||||
Adjustment for undistributed equity earnings | (8.1 | ) | (7.1 | ) | (3.2 | ) | (4.0 | ) | (8.3 | ) | (7.1 | ) | (7.0 | ) | |||||||||
Less: | |||||||||||||||||||||||
Interest capitalized | — | 1.1 | 1.3 | 1.0 | 0.5 | 6.1 | 2.7 | ||||||||||||||||
Preferred dividend requirements of subsidiaries (pre-tax basis) (b) | 8.8 | 9.0 | 12.0 | 11.3 | 13.0 | 20.1 | 22.0 | ||||||||||||||||
Total earnings as defined | $497.1 | $539.3 | $636.9 | $609.2 | $585.3 | $589.0 | $569.0 | ||||||||||||||||
FIXED CHARGES: | |||||||||||||||||||||||
Interest expense | $144.8 | $139.5 | $187.1 | $180.6 | $172.8 | $156.7 | $158.3 | ||||||||||||||||
Interest capitalized | — | 1.1 | 1.3 | 1.0 | 0.5 | 6.1 | 2.7 | ||||||||||||||||
Estimated interest component of rent expense | 2.4 | 1.9 | 1.9 | 2.8 | 2.7 | 25.1 | 25.4 | ||||||||||||||||
Preferred dividend requirements of subsidiaries (pre-tax basis) (b) | 8.8 | 9.0 | 12.0 | 11.3 | 13.0 | 20.1 | 22.0 | ||||||||||||||||
Total fixed charges as defined | $156.0 | $151.5 | $202.3 | $195.7 | $189.0 | $208.0 | $208.4 | ||||||||||||||||
Ratio of Earnings to Fixed Charges (c) | 3.19 | 3.56 | 3.15 | 3.11 | 3.10 | 2.83 | 2.73 |
Nine Months Ended | |||||||||||||||||||||||
September 30, | Years Ended December 31, | ||||||||||||||||||||||
2016 | 2015 | 2015 | 2014 | 2013 | 2012 | 2011 | |||||||||||||||||
(dollars in millions) | |||||||||||||||||||||||
EARNINGS: | |||||||||||||||||||||||
Net income | $199.3 | $188.2 | $196.2 | $191.8 | $188.3 | $158.3 | $139.3 | ||||||||||||||||
Income tax benefit (a) | (2.5 | ) | (24.4 | ) | (22.7 | ) | (48.9 | ) | (36.3 | ) | (27.9 | ) | (3.6 | ) | |||||||||
Income before income taxes | 196.8 | 163.8 | 173.5 | 142.9 | 152.0 | 130.4 | 135.7 | ||||||||||||||||
Fixed charges as defined | 76.7 | 72.7 | 97.2 | 91.0 | 82.3 | 79.3 | 79.6 | ||||||||||||||||
Total earnings as defined | $273.5 | $236.5 | $270.7 | $233.9 | $234.3 | $209.7 | $215.3 | ||||||||||||||||
FIXED CHARGES: | |||||||||||||||||||||||
Interest expense | $75.4 | $71.8 | $96.8 | $89.9 | $81.3 | $78.5 | $78.7 | ||||||||||||||||
Estimated interest component of rent expense | 1.3 | 0.9 | 0.4 | 1.1 | 1.0 | 0.8 | 0.9 | ||||||||||||||||
Total fixed charges as defined | $76.7 | $72.7 | $97.2 | $91.0 | $82.3 | $79.3 | $79.6 | ||||||||||||||||
Ratio of Earnings to Fixed Charges | 3.57 | 3.25 | 2.78 | 2.57 | 2.85 | 2.64 | 2.70 | ||||||||||||||||
Preferred dividend requirements (pre-tax basis) (b) | $7.6 | $6.7 | $9.0 | $7.6 | $8.7 | $10.4 | $14.6 | ||||||||||||||||
Fixed charges and preferred dividend requirements | $84.3 | $79.4 | $106.2 | $98.6 | $91.0 | $89.7 | $94.2 | ||||||||||||||||
Ratio of Earnings to Combined Fixed Charges and Preferred Dividend Requirements | 3.24 | 2.98 | 2.55 | 2.37 | 2.57 | 2.34 | 2.29 |
Nine Months Ended | |||||||||||||||||||||||
September 30, | Years Ended December 31, | ||||||||||||||||||||||
2016 | 2015 | 2015 | 2014 | 2013 | 2012 | 2011 | |||||||||||||||||
(dollars in millions) | |||||||||||||||||||||||
EARNINGS: | |||||||||||||||||||||||
Net income | $160.3 | $153.2 | $177.6 | $181.1 | $179.1 | $172.7 | $163.5 | ||||||||||||||||
Income taxes (a) | 77.1 | 73.0 | 82.9 | 85.3 | 85.6 | 87.6 | 81.9 | ||||||||||||||||
Income before income taxes | 237.4 | 226.2 | 260.5 | 266.4 | 264.7 | 260.3 | 245.4 | ||||||||||||||||
Fixed charges as defined | 69.7 | 70.4 | 93.7 | 87.7 | 86.4 | 103.9 | 103.3 | ||||||||||||||||
Adjustment for undistributed equity earnings | (8.3 | ) | (8.4 | ) | (4.5 | ) | (6.4 | ) | (8.3 | ) | (7.9 | ) | (6.4 | ) | |||||||||
Total earnings as defined | $298.8 | $288.2 | $349.7 | $347.7 | $342.8 | $356.3 | $342.3 | ||||||||||||||||
FIXED CHARGES: | |||||||||||||||||||||||
Interest expense | $68.7 | $69.5 | $92.4 | $86.4 | $85.0 | $80.2 | $79.9 | ||||||||||||||||
Estimated interest component of rent expense | 1.0 | 0.9 | 1.3 | 1.3 | 1.4 | 23.7 | 23.4 | ||||||||||||||||
Total fixed charges as defined | $69.7 | $70.4 | $93.7 | $87.7 | $86.4 | $103.9 | $103.3 | ||||||||||||||||
Ratio of Earnings to Fixed Charges | 4.29 | 4.09 | 3.73 | 3.96 | 3.97 | 3.43 | 3.31 |
1. | I have reviewed this quarterly report on Form 10-Q of Alliant Energy Corporation; |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; |
3. | Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; |
4. | The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: |
a) | Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; |
b) | Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; |
c) | Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and |
d) | Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and |
5. | The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions): |
a) | All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and |
b) | Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. |
/s/ Patricia L. Kampling |
Patricia L. Kampling |
Chairman, President and Chief Executive Officer |
1. | I have reviewed this quarterly report on Form 10-Q of Alliant Energy Corporation; |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; |
3. | Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; |
4. | The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: |
a) | Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; |
b) | Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; |
c) | Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and |
d) | Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and |
5. | The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions): |
a) | All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and |
b) | Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. |
/s/ Thomas L. Hanson |
Thomas L. Hanson |
Senior Vice President and Chief Financial Officer |
1. | I have reviewed this quarterly report on Form 10-Q of Interstate Power and Light Company; |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; |
3. | Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; |
4. | The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: |
a) | Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; |
b) | Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; |
c) | Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and |
d) | Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and |
5. | The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions): |
a) | All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and |
b) | Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. |
/s/ Patricia L. Kampling |
Patricia L. Kampling |
Chairman and Chief Executive Officer |
1. | I have reviewed this quarterly report on Form 10-Q of Interstate Power and Light Company; |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; |
3. | Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; |
4. | The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: |
a) | Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; |
b) | Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; |
c) | Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and |
d) | Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and |
5. | The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions): |
a) | All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and |
b) | Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. |
/s/ Thomas L. Hanson |
Thomas L. Hanson |
Senior Vice President and Chief Financial Officer |
1. | I have reviewed this quarterly report on Form 10-Q of Wisconsin Power and Light Company; |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; |
3. | Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; |
4. | The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: |
a) | Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; |
b) | Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; |
c) | Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and |
d) | Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and |
5. | The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions): |
a) | All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and |
b) | Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. |
/s/ Patricia L. Kampling |
Patricia L. Kampling |
Chairman and Chief Executive Officer |
1. | I have reviewed this quarterly report on Form 10-Q of Wisconsin Power and Light Company; |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; |
3. | Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; |
4. | The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have: |
a) | Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; |
b) | Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; |
c) | Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and |
d) | Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and |
5. | The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions): |
a) | All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and |
b) | Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. |
/s/ Thomas L. Hanson |
Thomas L. Hanson |
Senior Vice President and Chief Financial Officer |
/s/ Patricia L. Kampling |
Patricia L. Kampling |
Chairman, President and Chief Executive Officer |
/s/ Thomas L. Hanson |
Thomas L. Hanson |
Senior Vice President and Chief Financial Officer |
/s/ Patricia L. Kampling |
Patricia L. Kampling |
Chairman and Chief Executive Officer |
/s/ Thomas L. Hanson |
Thomas L. Hanson |
Senior Vice President and Chief Financial Officer |
/s/ Patricia L. Kampling |
Patricia L. Kampling |
Chairman and Chief Executive Officer |
/s/ Thomas L. Hanson |
Thomas L. Hanson |
Senior Vice President and Chief Financial Officer |
Document And Entity Information |
9 Months Ended |
---|---|
Sep. 30, 2016
shares
| |
Entity Registrant Name | ALLIANT ENERGY CORP |
Entity Central Index Key | 0000352541 |
Current Fiscal Year End Date | --12-31 |
Entity Filer Category | Large Accelerated Filer |
Entity Common Stock, Shares Outstanding | 227,500,428 |
Document Fiscal Year Focus | 2016 |
Document Fiscal Period Focus | Q3 |
Document Type | 10-Q |
Amendment Flag | false |
Document Period End Date | Sep. 30, 2016 |
IPL [Member] | |
Entity Registrant Name | INTERSTATE POWER & LIGHT CO |
Entity Central Index Key | 0000052485 |
Entity Filer Category | Non-accelerated Filer |
Entity Common Stock, Shares Outstanding | 13,370,788 |
WPL [Member] | |
Entity Registrant Name | WISCONSIN POWER & LIGHT CO |
Entity Central Index Key | 0000107832 |
Entity Filer Category | Non-accelerated Filer |
Entity Common Stock, Shares Outstanding | 13,236,601 |
Condensed Consolidated Balance Sheets - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
|||
---|---|---|---|---|---|
Current assets: | |||||
Cash and cash equivalents | $ 84.7 | $ 5.8 | |||
Accounts receivable, less allowance for doubtful accounts | 491.5 | 397.6 | |||
Production fuel, at weighted average cost | 92.6 | 98.8 | |||
Gas stored underground, at weighted average cost | 37.8 | 43.3 | |||
Materials and supplies, at weighted average cost | 89.5 | 81.4 | |||
Regulatory assets | 63.1 | 120.2 | |||
Other | 98.9 | 79.7 | |||
Total current assets | 958.1 | 826.8 | |||
Property, plant and equipment, net | 9,920.4 | 9,519.1 | |||
Investments: | |||||
Investment in American Transmission Company LLC | 309.9 | 293.3 | |||
Other | 19.7 | 53.0 | |||
Total investments | 329.6 | 346.3 | |||
Other assets: | |||||
Regulatory assets | 1,811.7 | 1,788.4 | |||
Deferred charges and other | 9.4 | 14.6 | |||
Total other assets | 1,821.1 | 1,803.0 | |||
Total assets | 13,029.2 | 12,495.2 | |||
Current liabilities: | |||||
Current maturities of long-term debt | 314.0 | 313.4 | |||
Commercial paper | 238.3 | 159.8 | |||
Accounts payable | 365.1 | 402.4 | |||
Regulatory liabilities | 178.4 | 187.1 | |||
Other | 273.9 | 296.6 | |||
Total current liabilities | 1,369.7 | 1,359.3 | |||
Long-term debt, net (excluding current portion) | 3,816.9 | 3,522.2 | |||
Other liabilities: | |||||
Deferred tax liabilities | 2,530.6 | 2,381.2 | |||
Regulatory liabilities | 497.4 | 550.6 | |||
Pension and other benefit obligations | 455.3 | 451.8 | |||
Other | 300.2 | 306.0 | |||
Total other liabilities | 3,783.5 | 3,689.6 | |||
Commitments and contingencies (Note 13) | |||||
Common equity: | |||||
Common stock | [1] | 2.3 | 2.3 | ||
Additional paid-in capital | 1,686.0 | 1,661.8 | |||
Retained earnings | 2,181.0 | 2,068.9 | |||
Accumulated other comprehensive loss | (0.4) | (0.4) | |||
Shares in deferred compensation trust - 432,619 and 430,186 shares at a weighted average cost of $22.54 and $19.84 per share | [1] | (9.8) | (8.5) | ||
Total common equity | 3,859.1 | 3,724.1 | |||
Cumulative preferred stock of Interstate Power and Light Company | 200.0 | 200.0 | |||
Total equity | 4,059.1 | 3,924.1 | |||
Total liabilities and equity | 13,029.2 | 12,495.2 | |||
IPL [Member] | |||||
Current assets: | |||||
Cash and cash equivalents | 77.7 | 4.5 | |||
Accounts receivable, less allowance for doubtful accounts | 266.8 | 200.0 | |||
Production fuel, at weighted average cost | 70.0 | 60.2 | |||
Gas stored underground, at weighted average cost | 17.4 | 18.2 | |||
Materials and supplies, at weighted average cost | 50.0 | 45.7 | |||
Regulatory assets | 15.0 | 39.6 | |||
Other | 37.2 | 28.2 | |||
Total current assets | 534.1 | 396.4 | |||
Property, plant and equipment, net | 5,220.1 | 4,925.1 | |||
Investments: | |||||
Total investments | 0.8 | 19.6 | |||
Other assets: | |||||
Regulatory assets | 1,402.2 | 1,363.0 | |||
Deferred charges and other | 3.8 | 5.0 | |||
Total other assets | 1,406.0 | 1,368.0 | |||
Total assets | 7,161.0 | 6,709.1 | |||
Current liabilities: | |||||
Commercial paper | 0.0 | ||||
Accounts payable | 172.6 | 197.2 | |||
Accounts payable to associated companies | 55.0 | 37.7 | |||
Regulatory liabilities | 132.5 | 130.9 | |||
Accrued taxes | 41.2 | 67.6 | |||
Other | 85.9 | 97.7 | |||
Total current liabilities | 487.2 | 531.1 | |||
Long-term debt, net (excluding current portion) | 2,153.1 | 1,856.9 | |||
Other liabilities: | |||||
Deferred tax liabilities | 1,493.6 | 1,378.0 | |||
Regulatory liabilities | 298.9 | 358.3 | |||
Pension and other benefit obligations | 161.2 | 160.2 | |||
Other | 229.1 | 229.3 | |||
Total other liabilities | 2,182.8 | 2,125.8 | |||
Commitments and contingencies (Note 13) | |||||
Common equity: | |||||
Common stock | 33.4 | 33.4 | |||
Additional paid-in capital | 1,472.8 | 1,407.8 | |||
Retained earnings | 631.7 | 554.1 | |||
Total common equity | 2,137.9 | 1,995.3 | |||
Cumulative preferred stock of Interstate Power and Light Company | 200.0 | 200.0 | |||
Total equity | 2,337.9 | 2,195.3 | |||
Total liabilities and equity | 7,161.0 | 6,709.1 | |||
WPL [Member] | |||||
Current assets: | |||||
Cash and cash equivalents | 5.6 | 0.4 | |||
Accounts receivable, less allowance for doubtful accounts | 190.7 | 185.4 | |||
Production fuel, at weighted average cost | 22.6 | 38.6 | |||
Gas stored underground, at weighted average cost | 20.4 | 25.1 | |||
Materials and supplies, at weighted average cost | 35.7 | 33.5 | |||
Regulatory assets | 48.1 | 80.6 | |||
Other | 53.9 | 59.9 | |||
Total current assets | 377.0 | 423.5 | |||
Property, plant and equipment, net | 4,289.1 | 4,103.7 | |||
Investments: | |||||
Investment in American Transmission Company LLC | 309.9 | 293.3 | |||
Other | 13.4 | 15.4 | |||
Total investments | 323.3 | 308.7 | |||
Other assets: | |||||
Regulatory assets | 409.5 | 425.4 | |||
Deferred charges and other | 6.9 | 9.1 | |||
Total other assets | 416.4 | 434.5 | |||
Total assets | 5,405.8 | 5,270.4 | |||
Current liabilities: | |||||
Commercial paper | 11.8 | 19.9 | |||
Accounts payable | 122.3 | 136.0 | |||
Accounts payable to associated companies | 32.8 | 21.6 | |||
Regulatory liabilities | 45.9 | 56.2 | |||
Other | 91.0 | 103.2 | |||
Total current liabilities | 303.8 | 336.9 | |||
Long-term debt, net (excluding current portion) | 1,534.9 | 1,533.9 | |||
Other liabilities: | |||||
Deferred tax liabilities | 1,108.8 | 1,005.4 | |||
Regulatory liabilities | 198.5 | 192.3 | |||
Capital lease obligations - Sheboygan Falls Energy Facility | 78.9 | 83.6 | |||
Pension and other benefit obligations | 186.2 | 188.7 | |||
Other | 162.4 | 162.0 | |||
Total other liabilities | 1,734.8 | 1,632.0 | |||
Commitments and contingencies (Note 13) | |||||
Common equity: | |||||
Common stock | 66.2 | 66.2 | |||
Additional paid-in capital | 959.0 | 959.0 | |||
Retained earnings | 788.6 | 731.1 | |||
Total common equity | 1,813.8 | 1,756.3 | |||
Noncontrolling interest | 18.5 | 11.3 | |||
Total equity | 1,832.3 | 1,767.6 | |||
Total liabilities and equity | $ 5,405.8 | $ 5,270.4 | |||
|
Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares |
Sep. 30, 2016 |
Dec. 31, 2015 |
|||
---|---|---|---|---|---|
Common stock, par value | [1] | $ 0.01 | $ 0.01 | ||
Common stock, shares authorized (in shares) | [1] | 480,000,000 | 480,000,000 | ||
Common stock, shares outstanding (in shares) | [1] | 227,500,428 | 226,918,432 | ||
Shares in deferred compensation trust (in shares) | [1] | 432,619 | 430,186 | ||
Shares in deferred compensation trust, weighted average cost per share (in dollars per share) | [1] | $ 22.54 | $ 19.84 | ||
IPL [Member] | |||||
Common stock, par value | $ 2.50 | $ 2.50 | |||
Common stock, shares authorized (in shares) | 24,000,000 | 24,000,000 | |||
Common stock, shares outstanding (in shares) | 13,370,788 | 13,370,788 | |||
WPL [Member] | |||||
Common stock, par value | $ 5.00 | $ 5.00 | |||
Common stock, shares authorized (in shares) | 18,000,000 | 18,000,000 | |||
Common stock, shares outstanding (in shares) | 13,236,601 | 13,236,601 | |||
|
Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions |
9 Months Ended | |
---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Cash flows from operating activities: | ||
Net income | $ 316.5 | $ 351.8 |
Adjustments to reconcile net income to net cash flows from operating activities: | ||
Depreciation and amortization | 308.7 | 299.9 |
Deferred tax expense and investment tax credits | 76.7 | 101.0 |
Asset valuation charges for Franklin County wind farm | 86.4 | 0.0 |
Other | (44.0) | (2.5) |
Other changes in assets and liabilities: | ||
Accounts receivable | (101.0) | 11.7 |
Sales of accounts receivable | (4.0) | (21.0) |
Regulatory assets | 36.6 | (51.3) |
Regulatory liabilities | (66.5) | (61.5) |
Deferred income taxes | 71.8 | 74.1 |
Other | (27.2) | (6.9) |
Net cash flows from operating activities | 654.0 | 695.3 |
Cash flows used for investing activities: | ||
Utility business construction and acquisition expenditures | (743.6) | (678.9) |
Alliant Energy Corporate Services, Inc. and non-regulated businesses construction and acquisition expenditures | (43.3) | (47.5) |
Proceeds from Minnesota electric and natural gas distribution asset sales | 0.0 | 138.1 |
Other | 15.1 | (24.7) |
Net cash flows used for investing activities | (771.8) | (613.0) |
Cash flows from (used for) financing activities: | ||
Common stock dividends | (199.8) | (185.1) |
Proceeds from issuance of common stock, net | 20.4 | 145.4 |
Proceeds from issuance of long-term debt | 300.0 | 250.7 |
Payments to retire long-term debt | (1.9) | (182.0) |
Net change in commercial paper | 78.5 | (32.2) |
Other | (0.5) | 3.2 |
Net cash flows from (used for) financing activities | 196.7 | 0.0 |
Net increase (decrease) in cash and cash equivalents | 78.9 | 82.3 |
Cash and cash equivalents at beginning of period | 5.8 | 56.9 |
Cash and cash equivalents at end of period | 84.7 | 139.2 |
Supplemental cash flows information: | ||
Interest, net of capitalized interest | (140.7) | (133.9) |
Income taxes, net | (8.3) | 0.0 |
Significant non-cash investing and financing activities: | ||
Accrued capital expenditures | 99.9 | 180.0 |
IPL [Member] | ||
Cash flows from operating activities: | ||
Net income | 199.3 | 188.2 |
Adjustments to reconcile net income to net cash flows from operating activities: | ||
Depreciation and amortization | 157.8 | 155.1 |
Other | 24.3 | 32.3 |
Other changes in assets and liabilities: | ||
Accounts receivable | (66.5) | (8.3) |
Sales of accounts receivable | (4.0) | (21.0) |
Regulatory assets | (14.1) | (38.1) |
Regulatory liabilities | (64.5) | (63.1) |
Deferred income taxes | 67.7 | 72.0 |
Other | (43.5) | 0.9 |
Net cash flows from operating activities | 256.5 | 318.0 |
Cash flows used for investing activities: | ||
Utility business construction and acquisition expenditures | (436.5) | (432.6) |
Proceeds from Minnesota electric and natural gas distribution asset sales | 0.0 | 138.1 |
Other | 1.1 | (24.9) |
Net cash flows used for investing activities | (435.4) | (319.4) |
Cash flows from (used for) financing activities: | ||
Common stock dividends | (114.0) | (105.0) |
Capital contributions from parent | 65.0 | 100.0 |
Proceeds from issuance of long-term debt | 300.0 | 250.0 |
Payments to retire long-term debt | 0.0 | (150.0) |
Other | 1.1 | 0.5 |
Net cash flows from (used for) financing activities | 252.1 | 95.5 |
Net increase (decrease) in cash and cash equivalents | 73.2 | 94.1 |
Cash and cash equivalents at beginning of period | 4.5 | 5.3 |
Cash and cash equivalents at end of period | 77.7 | 99.4 |
Supplemental cash flows information: | ||
Interest, net of capitalized interest | (72.5) | (66.7) |
Income taxes, net | 0.7 | 31.1 |
Significant non-cash investing and financing activities: | ||
Accrued capital expenditures | 44.5 | 115.5 |
WPL [Member] | ||
Cash flows from operating activities: | ||
Net income | 160.3 | 153.2 |
Adjustments to reconcile net income to net cash flows from operating activities: | ||
Depreciation and amortization | 143.5 | 137.5 |
Deferred tax expense and investment tax credits | 97.9 | 60.0 |
Other | (20.3) | (8.3) |
Other changes in assets and liabilities: | ||
Regulatory assets | 50.7 | (13.2) |
Derivative liabilities | (13.3) | 19.0 |
Other | 20.5 | 27.7 |
Net cash flows from operating activities | 439.3 | 375.9 |
Cash flows used for investing activities: | ||
Utility business construction and acquisition expenditures | (307.1) | (246.3) |
Other | (19.6) | (13.3) |
Net cash flows used for investing activities | (326.7) | (259.6) |
Cash flows from (used for) financing activities: | ||
Common stock dividends | (101.2) | (95.3) |
Payments to retire long-term debt | 0.0 | (30.6) |
Other | (6.2) | (1.4) |
Net cash flows from (used for) financing activities | (107.4) | (127.3) |
Net increase (decrease) in cash and cash equivalents | 5.2 | (11.0) |
Cash and cash equivalents at beginning of period | 0.4 | 46.7 |
Cash and cash equivalents at end of period | 5.6 | 35.7 |
Supplemental cash flows information: | ||
Interest, net of capitalized interest | (67.7) | (69.2) |
Income taxes, net | 19.6 | (10.0) |
Significant non-cash investing and financing activities: | ||
Accrued capital expenditures | $ 50.8 | $ 57.2 |
Summary Of Significant Accounting Policies |
9 Months Ended |
---|---|
Sep. 30, 2016 | |
Summary Of Significant Accounting Policies | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES NOTE 1(a) General - The interim unaudited Financial Statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Accordingly, certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted, although management believes that the disclosures are adequate to make the information presented not misleading. These Financial Statements should be read in conjunction with the financial statements and the notes thereto included in the latest combined Annual Report on Form 10-K. In the opinion of management, all adjustments, which unless otherwise noted are normal and recurring in nature, necessary for a fair presentation of the results of operations, financial position and cash flows have been made. Results for the nine months ended September 30, 2016 are not necessarily indicative of results that may be expected for the year ending December 31, 2016. A change in management’s estimates or assumptions could have a material impact on financial condition and results of operations during the period in which such change occurred. Certain prior period amounts in the Financial Statements and Notes have been reclassified to conform to the current period presentation for comparative purposes. Unless otherwise noted, the Notes herein exclude discontinued operations for all periods presented. In the fourth quarter of 2015, IPL and WPL implemented a change in method of recording income taxes that impacts the separate financial statements of IPL and WPL. As discussed in Note 6, all Alliant Energy share and per share amounts have been adjusted to reflect a two-for-one common stock split distributed in May 2016. As required by GAAP, all prior period financial statements and disclosures presented herein have been restated to reflect the tax method change and common stock split. NOTE 1(b) New Accounting Standards - Revenue Recognition - In May 2014, the Financial Accounting Standards Board issued an accounting standard providing principles for recognizing revenue for the transfer of promised goods or services to customers with the consideration to which the entity expects to be entitled in exchange for those goods or services. This standard also requires disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Alliant Energy, IPL and WPL currently expect to adopt this standard on January 1, 2018 and are evaluating the impact of this standard on their financial condition and results of operations. Leases - In February 2016, the Financial Accounting Standards Board issued an accounting standard requiring lease assets and lease liabilities, including operating leases, to be recognized on the balance sheet for all leases with terms longer than 12 months. The standard also requires disclosure of key information about leasing arrangements. Alliant Energy, IPL and WPL are required to adopt this standard on January 1, 2019 and are currently evaluating the impact of this standard on their financial condition and results of operations. Early adoption of this standard is permitted. NOTE 1(c) Property, Plant and Equipment - Utility Plant - Depreciation - In September 2016, the PSCW issued an order approving the implementation of updated depreciation rates for WPL effective January 1, 2017 as a result of a recently completed depreciation study. WPL estimates the new average rates of depreciation for its electric generation, electric distribution and gas properties will be approximately 3.2%, 2.6% and 2.3%, respectively, during 2017. |
IPL [Member] | |
Summary Of Significant Accounting Policies | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES NOTE 1(a) General - The interim unaudited Financial Statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Accordingly, certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted, although management believes that the disclosures are adequate to make the information presented not misleading. These Financial Statements should be read in conjunction with the financial statements and the notes thereto included in the latest combined Annual Report on Form 10-K. In the opinion of management, all adjustments, which unless otherwise noted are normal and recurring in nature, necessary for a fair presentation of the results of operations, financial position and cash flows have been made. Results for the nine months ended September 30, 2016 are not necessarily indicative of results that may be expected for the year ending December 31, 2016. A change in management’s estimates or assumptions could have a material impact on financial condition and results of operations during the period in which such change occurred. Certain prior period amounts in the Financial Statements and Notes have been reclassified to conform to the current period presentation for comparative purposes. Unless otherwise noted, the Notes herein exclude discontinued operations for all periods presented. In the fourth quarter of 2015, IPL and WPL implemented a change in method of recording income taxes that impacts the separate financial statements of IPL and WPL. As discussed in Note 6, all Alliant Energy share and per share amounts have been adjusted to reflect a two-for-one common stock split distributed in May 2016. As required by GAAP, all prior period financial statements and disclosures presented herein have been restated to reflect the tax method change and common stock split. NOTE 1(b) New Accounting Standards - Revenue Recognition - In May 2014, the Financial Accounting Standards Board issued an accounting standard providing principles for recognizing revenue for the transfer of promised goods or services to customers with the consideration to which the entity expects to be entitled in exchange for those goods or services. This standard also requires disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Alliant Energy, IPL and WPL currently expect to adopt this standard on January 1, 2018 and are evaluating the impact of this standard on their financial condition and results of operations. Leases - In February 2016, the Financial Accounting Standards Board issued an accounting standard requiring lease assets and lease liabilities, including operating leases, to be recognized on the balance sheet for all leases with terms longer than 12 months. The standard also requires disclosure of key information about leasing arrangements. Alliant Energy, IPL and WPL are required to adopt this standard on January 1, 2019 and are currently evaluating the impact of this standard on their financial condition and results of operations. Early adoption of this standard is permitted. |
WPL [Member] | |
Summary Of Significant Accounting Policies | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES NOTE 1(a) General - The interim unaudited Financial Statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Accordingly, certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted, although management believes that the disclosures are adequate to make the information presented not misleading. These Financial Statements should be read in conjunction with the financial statements and the notes thereto included in the latest combined Annual Report on Form 10-K. In the opinion of management, all adjustments, which unless otherwise noted are normal and recurring in nature, necessary for a fair presentation of the results of operations, financial position and cash flows have been made. Results for the nine months ended September 30, 2016 are not necessarily indicative of results that may be expected for the year ending December 31, 2016. A change in management’s estimates or assumptions could have a material impact on financial condition and results of operations during the period in which such change occurred. Certain prior period amounts in the Financial Statements and Notes have been reclassified to conform to the current period presentation for comparative purposes. Unless otherwise noted, the Notes herein exclude discontinued operations for all periods presented. In the fourth quarter of 2015, IPL and WPL implemented a change in method of recording income taxes that impacts the separate financial statements of IPL and WPL. As discussed in Note 6, all Alliant Energy share and per share amounts have been adjusted to reflect a two-for-one common stock split distributed in May 2016. As required by GAAP, all prior period financial statements and disclosures presented herein have been restated to reflect the tax method change and common stock split. NOTE 1(b) New Accounting Standards - Revenue Recognition - In May 2014, the Financial Accounting Standards Board issued an accounting standard providing principles for recognizing revenue for the transfer of promised goods or services to customers with the consideration to which the entity expects to be entitled in exchange for those goods or services. This standard also requires disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Alliant Energy, IPL and WPL currently expect to adopt this standard on January 1, 2018 and are evaluating the impact of this standard on their financial condition and results of operations. Leases - In February 2016, the Financial Accounting Standards Board issued an accounting standard requiring lease assets and lease liabilities, including operating leases, to be recognized on the balance sheet for all leases with terms longer than 12 months. The standard also requires disclosure of key information about leasing arrangements. Alliant Energy, IPL and WPL are required to adopt this standard on January 1, 2019 and are currently evaluating the impact of this standard on their financial condition and results of operations. Early adoption of this standard is permitted. NOTE 1(c) Property, Plant and Equipment - Utility Plant - Depreciation - In September 2016, the PSCW issued an order approving the implementation of updated depreciation rates for WPL effective January 1, 2017 as a result of a recently completed depreciation study. WPL estimates the new average rates of depreciation for its electric generation, electric distribution and gas properties will be approximately 3.2%, 2.6% and 2.3%, respectively, during 2017. |
Regulatory Matters |
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Public Utilities, General Disclosures [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Regulatory Matters | REGULATORY MATTERS Regulatory Assets and Regulatory Liabilities - Regulatory assets were comprised of the following items (in millions):
Regulatory liabilities were comprised of the following items (in millions):
Tax-related - Alliant Energy’s and IPL’s tax-related regulatory assets are generally impacted by certain property-related differences at IPL for which deferred tax is not recorded in the income statement pursuant to Iowa rate-making principles. Deferred tax amounts for such property-related differences at IPL are recorded to regulatory assets, along with the necessary revenue requirement tax gross-ups. During the nine months ended September 30, 2016, Alliant Energy’s and IPL’s tax-related regulatory assets increased primarily due to property-related differences for qualifying repair expenditures. Derivatives - Refer to Note 12 for discussion of derivative assets and derivative liabilities. IPL’s tax benefit riders - IPL’s tax benefit riders utilize regulatory liabilities to credit bills of IPL’s Iowa retail electric and gas customers to help offset the impact of rate increases on such customers. These regulatory liabilities are related to tax benefits from tax accounting method changes for repairs expenditures, allocation of mixed service costs, allocation of insurance proceeds from floods in 2008, and cost of removal expenditures. For the nine months ended September 30, 2016, Alliant Energy’s and IPL’s “IPL’s tax benefit riders” regulatory liabilities decreased by $56 million as follows (in millions):
Refer to Note 8 for additional details regarding IPL’s tax benefit riders. Utility Rate Cases - WPL’s Wisconsin Retail Electric and Gas Rate Case (2017/2018 Test Period) - In May 2016, WPL filed a retail base rate case with the PSCW based on a forward-looking test period that includes 2017 and 2018. WPL’s filing was based on a stipulated agreement reached between PSCW staff, intervener groups and WPL. The filing requested approval for WPL to implement a $13 million, or approximately 1%, increase in annual rates for WPL’s retail electric customers. The net requested increase for 2017 compared to WPL’s retail electric rate case for the 2015/2016 Test Period reflected a $65 million increase in base rates, partially offset by a $52 million reduction in fuel-related costs, using a preliminary estimate for 2017 fuel-related costs. The filing also requested approval for WPL to implement a $9 million, or approximately 13%, increase in annual base rates for WPL’s retail gas customers. Any rate changes granted from this request are expected to be effective January 1, 2017 and extend through the end of 2018. WPL currently expects a decision from the PSCW regarding this base rate case filing in the fourth quarter of 2016. IPL’s Iowa Retail Electric Rate Settlement Agreement - The IUB approved a settlement agreement in 2014 related to rates charged to IPL’s Iowa retail electric customers. The settlement agreement extends IPL’s Iowa retail electric base rates authorized in its 2009 Test Year rate case through 2016 and provides targeted retail electric customer billing credits. For the three and nine months ended September 30, IPL recorded billing credits to reduce retail electric customers’ bills as follows (in millions):
WPL’s Retail Fuel-related Rate Filing (2016 Test Year) - Pursuant to a 2015 PSCW order, WPL’s 2016 fuel-related costs will be subject to deferral if they are outside an annual bandwidth of plus or minus 2% of the approved annual forecasted fuel-related costs. Retail fuel-related costs incurred by WPL through September 30, 2016 were lower than fuel-related costs used to determine rates for such period resulting in an over-collection of fuel-related costs. As of September 30, 2016, fuel-related costs outside of the approved range were $9 million and are included in “Commodity cost recovery” in Alliant Energy’s and WPL’s regulatory liabilities table above. WPL’s Retail Fuel-related Rate Filing (2015 Test Year) - Pursuant to a 2014 PSCW order, WPL’s 2015 fuel-related costs were subject to deferral since they were outside an annual bandwidth of plus or minus 2% of the approved annual forecasted fuel-related costs. Retail fuel-related costs incurred by WPL in 2015 were lower than fuel-related costs used to determine rates for such period resulting in an over-collection of fuel-related costs. Pursuant to an August 2016 PSCW order, WPL will refund $10 million, including interest, to its retail electric customers in the fourth quarter of 2016 for these over-collections. |
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Public Utilities, General Disclosures [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Regulatory Matters | REGULATORY MATTERS Regulatory Assets and Regulatory Liabilities - Regulatory assets were comprised of the following items (in millions):
Regulatory liabilities were comprised of the following items (in millions):
Tax-related - Alliant Energy’s and IPL’s tax-related regulatory assets are generally impacted by certain property-related differences at IPL for which deferred tax is not recorded in the income statement pursuant to Iowa rate-making principles. Deferred tax amounts for such property-related differences at IPL are recorded to regulatory assets, along with the necessary revenue requirement tax gross-ups. During the nine months ended September 30, 2016, Alliant Energy’s and IPL’s tax-related regulatory assets increased primarily due to property-related differences for qualifying repair expenditures. Derivatives - Refer to Note 12 for discussion of derivative assets and derivative liabilities. IPL’s tax benefit riders - IPL’s tax benefit riders utilize regulatory liabilities to credit bills of IPL’s Iowa retail electric and gas customers to help offset the impact of rate increases on such customers. These regulatory liabilities are related to tax benefits from tax accounting method changes for repairs expenditures, allocation of mixed service costs, allocation of insurance proceeds from floods in 2008, and cost of removal expenditures. For the nine months ended September 30, 2016, Alliant Energy’s and IPL’s “IPL’s tax benefit riders” regulatory liabilities decreased by $56 million as follows (in millions):
Refer to Note 8 for additional details regarding IPL’s tax benefit riders. Utility Rate Cases - WPL’s Wisconsin Retail Electric and Gas Rate Case (2017/2018 Test Period) - In May 2016, WPL filed a retail base rate case with the PSCW based on a forward-looking test period that includes 2017 and 2018. WPL’s filing was based on a stipulated agreement reached between PSCW staff, intervener groups and WPL. The filing requested approval for WPL to implement a $13 million, or approximately 1%, increase in annual rates for WPL’s retail electric customers. The net requested increase for 2017 compared to WPL’s retail electric rate case for the 2015/2016 Test Period reflected a $65 million increase in base rates, partially offset by a $52 million reduction in fuel-related costs, using a preliminary estimate for 2017 fuel-related costs. The filing also requested approval for WPL to implement a $9 million, or approximately 13%, increase in annual base rates for WPL’s retail gas customers. Any rate changes granted from this request are expected to be effective January 1, 2017 and extend through the end of 2018. WPL currently expects a decision from the PSCW regarding this base rate case filing in the fourth quarter of 2016. IPL’s Iowa Retail Electric Rate Settlement Agreement - The IUB approved a settlement agreement in 2014 related to rates charged to IPL’s Iowa retail electric customers. The settlement agreement extends IPL’s Iowa retail electric base rates authorized in its 2009 Test Year rate case through 2016 and provides targeted retail electric customer billing credits. For the three and nine months ended September 30, IPL recorded billing credits to reduce retail electric customers’ bills as follows (in millions):
WPL’s Retail Fuel-related Rate Filing (2016 Test Year) - Pursuant to a 2015 PSCW order, WPL’s 2016 fuel-related costs will be subject to deferral if they are outside an annual bandwidth of plus or minus 2% of the approved annual forecasted fuel-related costs. Retail fuel-related costs incurred by WPL through September 30, 2016 were lower than fuel-related costs used to determine rates for such period resulting in an over-collection of fuel-related costs. As of September 30, 2016, fuel-related costs outside of the approved range were $9 million and are included in “Commodity cost recovery” in Alliant Energy’s and WPL’s regulatory liabilities table above. WPL’s Retail Fuel-related Rate Filing (2015 Test Year) - Pursuant to a 2014 PSCW order, WPL’s 2015 fuel-related costs were subject to deferral since they were outside an annual bandwidth of plus or minus 2% of the approved annual forecasted fuel-related costs. Retail fuel-related costs incurred by WPL in 2015 were lower than fuel-related costs used to determine rates for such period resulting in an over-collection of fuel-related costs. Pursuant to an August 2016 PSCW order, WPL will refund $10 million, including interest, to its retail electric customers in the fourth quarter of 2016 for these over-collections. |
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Public Utilities, General Disclosures [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Regulatory Matters | REGULATORY MATTERS Regulatory Assets and Regulatory Liabilities - Regulatory assets were comprised of the following items (in millions):
Regulatory liabilities were comprised of the following items (in millions):
Tax-related - Alliant Energy’s and IPL’s tax-related regulatory assets are generally impacted by certain property-related differences at IPL for which deferred tax is not recorded in the income statement pursuant to Iowa rate-making principles. Deferred tax amounts for such property-related differences at IPL are recorded to regulatory assets, along with the necessary revenue requirement tax gross-ups. During the nine months ended September 30, 2016, Alliant Energy’s and IPL’s tax-related regulatory assets increased primarily due to property-related differences for qualifying repair expenditures. Derivatives - Refer to Note 12 for discussion of derivative assets and derivative liabilities. IPL’s tax benefit riders - IPL’s tax benefit riders utilize regulatory liabilities to credit bills of IPL’s Iowa retail electric and gas customers to help offset the impact of rate increases on such customers. These regulatory liabilities are related to tax benefits from tax accounting method changes for repairs expenditures, allocation of mixed service costs, allocation of insurance proceeds from floods in 2008, and cost of removal expenditures. For the nine months ended September 30, 2016, Alliant Energy’s and IPL’s “IPL’s tax benefit riders” regulatory liabilities decreased by $56 million as follows (in millions):
Refer to Note 8 for additional details regarding IPL’s tax benefit riders. Utility Rate Cases - WPL’s Wisconsin Retail Electric and Gas Rate Case (2017/2018 Test Period) - In May 2016, WPL filed a retail base rate case with the PSCW based on a forward-looking test period that includes 2017 and 2018. WPL’s filing was based on a stipulated agreement reached between PSCW staff, intervener groups and WPL. The filing requested approval for WPL to implement a $13 million, or approximately 1%, increase in annual rates for WPL’s retail electric customers. The net requested increase for 2017 compared to WPL’s retail electric rate case for the 2015/2016 Test Period reflected a $65 million increase in base rates, partially offset by a $52 million reduction in fuel-related costs, using a preliminary estimate for 2017 fuel-related costs. The filing also requested approval for WPL to implement a $9 million, or approximately 13%, increase in annual base rates for WPL’s retail gas customers. Any rate changes granted from this request are expected to be effective January 1, 2017 and extend through the end of 2018. WPL currently expects a decision from the PSCW regarding this base rate case filing in the fourth quarter of 2016. IPL’s Iowa Retail Electric Rate Settlement Agreement - The IUB approved a settlement agreement in 2014 related to rates charged to IPL’s Iowa retail electric customers. The settlement agreement extends IPL’s Iowa retail electric base rates authorized in its 2009 Test Year rate case through 2016 and provides targeted retail electric customer billing credits. For the three and nine months ended September 30, IPL recorded billing credits to reduce retail electric customers’ bills as follows (in millions):
WPL’s Retail Fuel-related Rate Filing (2016 Test Year) - Pursuant to a 2015 PSCW order, WPL’s 2016 fuel-related costs will be subject to deferral if they are outside an annual bandwidth of plus or minus 2% of the approved annual forecasted fuel-related costs. Retail fuel-related costs incurred by WPL through September 30, 2016 were lower than fuel-related costs used to determine rates for such period resulting in an over-collection of fuel-related costs. As of September 30, 2016, fuel-related costs outside of the approved range were $9 million and are included in “Commodity cost recovery” in Alliant Energy’s and WPL’s regulatory liabilities table above. WPL’s Retail Fuel-related Rate Filing (2015 Test Year) - Pursuant to a 2014 PSCW order, WPL’s 2015 fuel-related costs were subject to deferral since they were outside an annual bandwidth of plus or minus 2% of the approved annual forecasted fuel-related costs. Retail fuel-related costs incurred by WPL in 2015 were lower than fuel-related costs used to determine rates for such period resulting in an over-collection of fuel-related costs. Pursuant to an August 2016 PSCW order, WPL will refund $10 million, including interest, to its retail electric customers in the fourth quarter of 2016 for these over-collections. |
Property, Plant and Equipment |
9 Months Ended |
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Sep. 30, 2016 | |
Property, Plant and Equipment [Line Items] | |
Property, Plant and Equipment | PROPERTY, PLANT AND EQUIPMENT Utility - Emission Controls Project - WPL’s Edgewater Unit 5 - Construction of the scrubber and baghouse at Edgewater Unit 5 was completed in July 2016. As of September 30, 2016, Alliant Energy and WPL recorded capitalized expenditures of $223 million and AFUDC of $12 million for the scrubber and baghouse in “Property, plant and equipment, net” on their balance sheets. Natural Gas-Fired Generation Project - IPL’s Marshalltown Generating Station - IPL is currently constructing Marshalltown, an approximate 650 MW natural gas-fired combined-cycle EGU. Construction began in 2014 and is expected to be completed in the second quarter of 2017. As of September 30, 2016, Alliant Energy and IPL recorded capitalized expenditures for construction work in progress of $600 million and AFUDC of $56 million for Marshalltown in “Property, plant and equipment, net” on their balance sheets. Sales of IPL’s Minnesota Electric and Natural Gas Distribution Assets - In 2015, IPL completed the sale of its Minnesota natural gas distribution assets and received proceeds of $11 million and a promissory note of $2 million. In 2015, IPL completed the sale of its Minnesota electric distribution assets and received proceeds of $129 million. The proceeds from the natural gas distribution assets were used for general corporate purposes and the proceeds from the electric distribution assets were used to reduce cash amounts received from IPL’s sales of accounts receivable program. The premium received over the book value of the property, plant and equipment sold was more than offset by a reduction in tax-related regulatory assets associated with the distribution assets. As a result, Alliant Energy and IPL recorded pre-tax charges of $9 million and $3 million for the Minnesota electric and natural gas distribution asset transactions, respectively, in “Other operation and maintenance” in their income statements for the nine months ended September 30, 2015. Non-regulated and Other - Non-regulated Generation - Franklin County Wind Farm - Based on an evaluation of the strategic options for the Franklin County wind farm performed in the third quarter of 2016, Alliant Energy concluded, as of September 30, 2016, it was probable the Franklin County wind farm will be transferred to IPL. As a result, Alliant Energy performed an impairment analysis of such assets in the third quarter of 2016. The impairment analysis evaluated the value of the assets and a reasonable estimate of the amount of costs associated with the Franklin County wind farm that would be allowed for recovery for IPL’s electric rate-making purposes. Based on various analyses, including discounted cash flows projected from the Franklin County wind farm, recently executed purchased power agreements associated with wind generating facilities located near the Franklin County wind farm, and the cost of new wind farms identified through IPL’s planned wind expansion, the current value of the Franklin County wind farm assets as of September 30, 2016 was determined to be approximately $33 million, subject to working capital adjustments. Alliant Energy concluded such value represents a reasonable estimate of the amount IPL will be allowed for recovery for IPL’s electric rate-making purposes. As a result, the carrying amount of the Franklin County wind farm was reduced to its current value, resulting in non-cash, pre-tax asset valuation charges of $86 million (after-tax charges of $51 million, or $0.23 per share) in the third quarter of 2016. Alliant Energy recorded such charges as a reduction to “Property, plant and equipment, net” on its balance sheet in 2016 and charges to “Asset valuation charges for Franklin County wind farm” in its income statements for the three and nine months ended September 30, 2016. IPL currently anticipates requesting approval from FERC in the fourth quarter of 2016 to transfer the Franklin County wind farm to IPL and expects to complete such transfer in the first quarter of 2017. The final amount to be recovered for IPL’s electric rate-making purposes will be determined by the IUB as part of IPL’s Iowa retail electric rate case for the 2016 Test Year, currently anticipated to be filed in the second quarter of 2017, and therefore the final asset valuation charges are subject to change. |
IPL [Member] | |
Property, Plant and Equipment [Line Items] | |
Property, Plant and Equipment | PROPERTY, PLANT AND EQUIPMENT Utility - Emission Controls Project - WPL’s Edgewater Unit 5 - Construction of the scrubber and baghouse at Edgewater Unit 5 was completed in July 2016. As of September 30, 2016, Alliant Energy and WPL recorded capitalized expenditures of $223 million and AFUDC of $12 million for the scrubber and baghouse in “Property, plant and equipment, net” on their balance sheets. Natural Gas-Fired Generation Project - IPL’s Marshalltown Generating Station - IPL is currently constructing Marshalltown, an approximate 650 MW natural gas-fired combined-cycle EGU. Construction began in 2014 and is expected to be completed in the second quarter of 2017. As of September 30, 2016, Alliant Energy and IPL recorded capitalized expenditures for construction work in progress of $600 million and AFUDC of $56 million for Marshalltown in “Property, plant and equipment, net” on their balance sheets. Sales of IPL’s Minnesota Electric and Natural Gas Distribution Assets - In 2015, IPL completed the sale of its Minnesota natural gas distribution assets and received proceeds of $11 million and a promissory note of $2 million. In 2015, IPL completed the sale of its Minnesota electric distribution assets and received proceeds of $129 million. The proceeds from the natural gas distribution assets were used for general corporate purposes and the proceeds from the electric distribution assets were used to reduce cash amounts received from IPL’s sales of accounts receivable program. The premium received over the book value of the property, plant and equipment sold was more than offset by a reduction in tax-related regulatory assets associated with the distribution assets. As a result, Alliant Energy and IPL recorded pre-tax charges of $9 million and $3 million for the Minnesota electric and natural gas distribution asset transactions, respectively, in “Other operation and maintenance” in their income statements for the nine months ended September 30, 2015. Non-regulated and Other - Non-regulated Generation - Franklin County Wind Farm - Based on an evaluation of the strategic options for the Franklin County wind farm performed in the third quarter of 2016, Alliant Energy concluded, as of September 30, 2016, it was probable the Franklin County wind farm will be transferred to IPL. As a result, Alliant Energy performed an impairment analysis of such assets in the third quarter of 2016. The impairment analysis evaluated the value of the assets and a reasonable estimate of the amount of costs associated with the Franklin County wind farm that would be allowed for recovery for IPL’s electric rate-making purposes. Based on various analyses, including discounted cash flows projected from the Franklin County wind farm, recently executed purchased power agreements associated with wind generating facilities located near the Franklin County wind farm, and the cost of new wind farms identified through IPL’s planned wind expansion, the current value of the Franklin County wind farm assets as of September 30, 2016 was determined to be approximately $33 million, subject to working capital adjustments. Alliant Energy concluded such value represents a reasonable estimate of the amount IPL will be allowed for recovery for IPL’s electric rate-making purposes. As a result, the carrying amount of the Franklin County wind farm was reduced to its current value, resulting in non-cash, pre-tax asset valuation charges of $86 million (after-tax charges of $51 million, or $0.23 per share) in the third quarter of 2016. Alliant Energy recorded such charges as a reduction to “Property, plant and equipment, net” on its balance sheet in 2016 and charges to “Asset valuation charges for Franklin County wind farm” in its income statements for the three and nine months ended September 30, 2016. IPL currently anticipates requesting approval from FERC in the fourth quarter of 2016 to transfer the Franklin County wind farm to IPL and expects to complete such transfer in the first quarter of 2017. The final amount to be recovered for IPL’s electric rate-making purposes will be determined by the IUB as part of IPL’s Iowa retail electric rate case for the 2016 Test Year, currently anticipated to be filed in the second quarter of 2017, and therefore the final asset valuation charges are subject to change. |
WPL [Member] | |
Property, Plant and Equipment [Line Items] | |
Property, Plant and Equipment | PROPERTY, PLANT AND EQUIPMENT Utility - Emission Controls Project - WPL’s Edgewater Unit 5 - Construction of the scrubber and baghouse at Edgewater Unit 5 was completed in July 2016. As of September 30, 2016, Alliant Energy and WPL recorded capitalized expenditures of $223 million and AFUDC of $12 million for the scrubber and baghouse in “Property, plant and equipment, net” on their balance sheets. |
Receivables |
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Receivables [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Receivables | RECEIVABLES Sales of Accounts Receivable - IPL maintains a Receivables Agreement whereby it may sell its customer accounts receivables, unbilled revenues and certain other accounts receivables to a third party through wholly-owned and consolidated special purpose entities. In March 2016, IPL extended through March 2018 the purchase commitment from the third party to which it sells its receivables. The transfers of receivables meet the criteria for sale accounting established by the transfer of financial assets accounting rules. As of September 30, 2016, IPL sold $252.9 million of receivables to the third party, received $1.0 million in cash proceeds and recorded deferred proceeds of $239.7 million. IPL’s maximum and average outstanding cash proceeds related to the sales of accounts receivable program for the three and nine months ended September 30 were as follows (in millions):
For the three and nine months ended September 30, 2016 and 2015, IPL’s costs incurred related to the sales of accounts receivable program were not material. The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):
As of September 30, 2016, outstanding receivables past due under the Receivables Agreement were $64.5 million. Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three and nine months ended September 30 were as follows (in millions):
In connection with the implementation of IPL’s new customer billing and information system in the first quarter of 2016, IPL postponed the write-off of customer bills, resulting in lower write-offs for the three and nine months ended September 30, 2016. |
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Receivables [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Receivables | RECEIVABLES Sales of Accounts Receivable - IPL maintains a Receivables Agreement whereby it may sell its customer accounts receivables, unbilled revenues and certain other accounts receivables to a third party through wholly-owned and consolidated special purpose entities. In March 2016, IPL extended through March 2018 the purchase commitment from the third party to which it sells its receivables. The transfers of receivables meet the criteria for sale accounting established by the transfer of financial assets accounting rules. As of September 30, 2016, IPL sold $252.9 million of receivables to the third party, received $1.0 million in cash proceeds and recorded deferred proceeds of $239.7 million. IPL’s maximum and average outstanding cash proceeds related to the sales of accounts receivable program for the three and nine months ended September 30 were as follows (in millions):
For the three and nine months ended September 30, 2016 and 2015, IPL’s costs incurred related to the sales of accounts receivable program were not material. The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):
As of September 30, 2016, outstanding receivables past due under the Receivables Agreement were $64.5 million. Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three and nine months ended September 30 were as follows (in millions):
In connection with the implementation of IPL’s new customer billing and information system in the first quarter of 2016, IPL postponed the write-off of customer bills, resulting in lower write-offs for the three and nine months ended September 30, 2016. |
Investments |
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Schedule of Investments [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Investments | INVESTMENTS NOTE 5(a) Unconsolidated Equity Investments - Equity (income) loss from unconsolidated investments accounted for under the equity method of accounting for the three and nine months ended September 30 was as follows (in millions):
MISO Transmission Owner Return on Equity Complaints - A group of MISO cooperative and municipal utilities previously filed two complaints with FERC requesting a reduction of the base return on equity used by MISO transmission owners, including ATC. In September 2016, FERC issued an order on the first complaint to reduce the base return on equity for the refund period from November 12, 2013 through February 11, 2015. In June 2016, a FERC administrative law judge issued an initial decision regarding the second complaint recommending a reduction of the base return on equity for the refund period from February 12, 2015 through May 11, 2016. A final decision on the second complaint from FERC is currently expected in the first half of 2017. Alliant Energy and WPL have realized a cumulative $24 million of reductions in the amount of equity income from ATC as a result of the two complaints through September 30, 2016, including $9 million during the nine months ended September 30, 2016. NOTE 5(b) Cash Surrender Value of Life Insurance Policies - During the nine months ended September 30, 2016, certain of Alliant Energy’s and IPL’s company-owned life insurance policies were liquidated. The related proceeds of $31 million and $19 million were recorded in investing activities in Alliant Energy’s and IPL’s cash flows statements, respectively. |
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Investments [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Investments | INVESTMENTS NOTE 5(a) Unconsolidated Equity Investments - Equity (income) loss from unconsolidated investments accounted for under the equity method of accounting for the three and nine months ended September 30 was as follows (in millions):
MISO Transmission Owner Return on Equity Complaints - A group of MISO cooperative and municipal utilities previously filed two complaints with FERC requesting a reduction of the base return on equity used by MISO transmission owners, including ATC. In September 2016, FERC issued an order on the first complaint to reduce the base return on equity for the refund period from November 12, 2013 through February 11, 2015. In June 2016, a FERC administrative law judge issued an initial decision regarding the second complaint recommending a reduction of the base return on equity for the refund period from February 12, 2015 through May 11, 2016. A final decision on the second complaint from FERC is currently expected in the first half of 2017. Alliant Energy and WPL have realized a cumulative $24 million of reductions in the amount of equity income from ATC as a result of the two complaints through September 30, 2016, including $9 million during the nine months ended September 30, 2016. NOTE 5(b) Cash Surrender Value of Life Insurance Policies - During the nine months ended September 30, 2016, certain of Alliant Energy’s and IPL’s company-owned life insurance policies were liquidated. The related proceeds of $31 million and $19 million were recorded in investing activities in Alliant Energy’s and IPL’s cash flows statements, respectively. |
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Investments [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Investments | INVESTMENTS NOTE 5(a) Unconsolidated Equity Investments - Equity (income) loss from unconsolidated investments accounted for under the equity method of accounting for the three and nine months ended September 30 was as follows (in millions):
MISO Transmission Owner Return on Equity Complaints - A group of MISO cooperative and municipal utilities previously filed two complaints with FERC requesting a reduction of the base return on equity used by MISO transmission owners, including ATC. In September 2016, FERC issued an order on the first complaint to reduce the base return on equity for the refund period from November 12, 2013 through February 11, 2015. In June 2016, a FERC administrative law judge issued an initial decision regarding the second complaint recommending a reduction of the base return on equity for the refund period from February 12, 2015 through May 11, 2016. A final decision on the second complaint from FERC is currently expected in the first half of 2017. Alliant Energy and WPL have realized a cumulative $24 million of reductions in the amount of equity income from ATC as a result of the two complaints through September 30, 2016, including $9 million during the nine months ended September 30, 2016. |
Common Equity |
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Common Equity [Line Items] | |||||||||||||||||||
Common Equity | COMMON EQUITY Common Share Activity - A summary of Alliant Energy’s common stock activity was as follows:
At-the-Market Offering Program - During the nine months ended September 30, 2015, Alliant Energy issued 4,373,234 shares of common stock through an at-the-market offering program and received cash proceeds of $133 million, net of $2 million in fees and commissions. The proceeds from the issuances of common stock were used for general corporate purposes. Common Stock Split - On April 20, 2016, Alliant Energy’s Board of Directors approved a two-for-one common stock split and a proportionate increase in the number of authorized shares of common stock of Alliant Energy from 240 million shares to 480 million shares to implement the stock split. Alliant Energy shareowners of record at the close of business on May 4, 2016 received one additional share of Alliant Energy common stock for each share held on that date. The proportionate interest that a shareowner owns in Alliant Energy did not change as a result of the stock split. The additional shares were distributed on May 19, 2016 and post-split trading began on May 20, 2016. All Alliant Energy share and per share amounts in this report have been reflected on a post-split basis. Dividend Restrictions - As of September 30, 2016, IPL’s amount of retained earnings that were free of dividend restrictions was $632 million. As of September 30, 2016, WPL’s amount of retained earnings that were free of dividend restrictions was $34 million for the remainder of 2016. Restricted Net Assets of Subsidiaries - As of September 30, 2016, the amount of net assets of IPL and WPL that were not available to be transferred to their parent company, Alliant Energy, in the form of loans, advances or cash dividends without the consent of IPL’s and WPL’s regulatory authorities was $1.5 billion and $1.8 billion, respectively. Capital Transactions with Subsidiaries - For the nine months ended September 30, 2016, IPL received capital contributions of $65.0 million from its parent company. For the nine months ended September 30, 2016, IPL and WPL paid common stock dividends of $114.0 million and $101.2 million, respectively, to their parent company. Comprehensive Income - For the three and nine months ended September 30, 2016 and 2015, Alliant Energy had no other comprehensive income; therefore, its comprehensive income was equal to its net income and its comprehensive income attributable to Alliant Energy common shareowners was equal to its net income attributable to Alliant Energy common shareowners for such periods. For the three and nine months ended September 30, 2016 and 2015, IPL and WPL had no other comprehensive income; therefore, their comprehensive income was equal to their net income and their comprehensive income available for common stock was equal to their earnings available for common stock for such periods. |
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IPL [Member] | |||||||||||||||||||
Common Equity [Line Items] | |||||||||||||||||||
Common Equity | COMMON EQUITY Common Share Activity - A summary of Alliant Energy’s common stock activity was as follows:
At-the-Market Offering Program - During the nine months ended September 30, 2015, Alliant Energy issued 4,373,234 shares of common stock through an at-the-market offering program and received cash proceeds of $133 million, net of $2 million in fees and commissions. The proceeds from the issuances of common stock were used for general corporate purposes. Common Stock Split - On April 20, 2016, Alliant Energy’s Board of Directors approved a two-for-one common stock split and a proportionate increase in the number of authorized shares of common stock of Alliant Energy from 240 million shares to 480 million shares to implement the stock split. Alliant Energy shareowners of record at the close of business on May 4, 2016 received one additional share of Alliant Energy common stock for each share held on that date. The proportionate interest that a shareowner owns in Alliant Energy did not change as a result of the stock split. The additional shares were distributed on May 19, 2016 and post-split trading began on May 20, 2016. All Alliant Energy share and per share amounts in this report have been reflected on a post-split basis. Dividend Restrictions - As of September 30, 2016, IPL’s amount of retained earnings that were free of dividend restrictions was $632 million. As of September 30, 2016, WPL’s amount of retained earnings that were free of dividend restrictions was $34 million for the remainder of 2016. Restricted Net Assets of Subsidiaries - As of September 30, 2016, the amount of net assets of IPL and WPL that were not available to be transferred to their parent company, Alliant Energy, in the form of loans, advances or cash dividends without the consent of IPL’s and WPL’s regulatory authorities was $1.5 billion and $1.8 billion, respectively. Capital Transactions with Subsidiaries - For the nine months ended September 30, 2016, IPL received capital contributions of $65.0 million from its parent company. For the nine months ended September 30, 2016, IPL and WPL paid common stock dividends of $114.0 million and $101.2 million, respectively, to their parent company. Comprehensive Income - For the three and nine months ended September 30, 2016 and 2015, Alliant Energy had no other comprehensive income; therefore, its comprehensive income was equal to its net income and its comprehensive income attributable to Alliant Energy common shareowners was equal to its net income attributable to Alliant Energy common shareowners for such periods. For the three and nine months ended September 30, 2016 and 2015, IPL and WPL had no other comprehensive income; therefore, their comprehensive income was equal to their net income and their comprehensive income available for common stock was equal to their earnings available for common stock for such periods. |
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WPL [Member] | |||||||||||||||||||
Common Equity [Line Items] | |||||||||||||||||||
Common Equity | COMMON EQUITY Common Share Activity - A summary of Alliant Energy’s common stock activity was as follows:
At-the-Market Offering Program - During the nine months ended September 30, 2015, Alliant Energy issued 4,373,234 shares of common stock through an at-the-market offering program and received cash proceeds of $133 million, net of $2 million in fees and commissions. The proceeds from the issuances of common stock were used for general corporate purposes. Common Stock Split - On April 20, 2016, Alliant Energy’s Board of Directors approved a two-for-one common stock split and a proportionate increase in the number of authorized shares of common stock of Alliant Energy from 240 million shares to 480 million shares to implement the stock split. Alliant Energy shareowners of record at the close of business on May 4, 2016 received one additional share of Alliant Energy common stock for each share held on that date. The proportionate interest that a shareowner owns in Alliant Energy did not change as a result of the stock split. The additional shares were distributed on May 19, 2016 and post-split trading began on May 20, 2016. All Alliant Energy share and per share amounts in this report have been reflected on a post-split basis. Dividend Restrictions - As of September 30, 2016, IPL’s amount of retained earnings that were free of dividend restrictions was $632 million. As of September 30, 2016, WPL’s amount of retained earnings that were free of dividend restrictions was $34 million for the remainder of 2016. Restricted Net Assets of Subsidiaries - As of September 30, 2016, the amount of net assets of IPL and WPL that were not available to be transferred to their parent company, Alliant Energy, in the form of loans, advances or cash dividends without the consent of IPL’s and WPL’s regulatory authorities was $1.5 billion and $1.8 billion, respectively. Capital Transactions with Subsidiaries - For the nine months ended September 30, 2016, IPL received capital contributions of $65.0 million from its parent company. For the nine months ended September 30, 2016, IPL and WPL paid common stock dividends of $114.0 million and $101.2 million, respectively, to their parent company. Comprehensive Income - For the three and nine months ended September 30, 2016 and 2015, Alliant Energy had no other comprehensive income; therefore, its comprehensive income was equal to its net income and its comprehensive income attributable to Alliant Energy common shareowners was equal to its net income attributable to Alliant Energy common shareowners for such periods. For the three and nine months ended September 30, 2016 and 2015, IPL and WPL had no other comprehensive income; therefore, their comprehensive income was equal to their net income and their comprehensive income available for common stock was equal to their earnings available for common stock for such periods. |
Debt |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Debt [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Debt | DEBT NOTE 7(a) Short-term Debt - Information regarding commercial paper classified as short-term debt was as follows (dollars in millions):
NOTE 7(b) Long-term Debt - In September 2016, IPL issued $300 million of 3.7% senior debentures due 2046. The proceeds from the issuance were used by IPL to reduce cash amounts received from its sales of accounts receivable program, reduce commercial paper classified as long-term debt by $100 million and for general corporate purposes. In October 2016, AEF entered into a $500 million variable-rate (1.3% at October 31, 2016) term loan credit agreement and used the proceeds from borrowings under this agreement to retire borrowings under Alliant Energy’s and Franklin County Holdings LLC’s variable-rate term loan credit agreements that matured in 2016, reduce outstanding commercial paper and for general corporate purposes. AEF’s term loan credit agreement expires in October 2018 and includes substantially the same financial covenants that are included in Alliant Energy’s credit facility agreement. |
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Debt [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Debt | DEBT NOTE 7(a) Short-term Debt - Information regarding commercial paper classified as short-term debt was as follows (dollars in millions):
NOTE 7(b) Long-term Debt - In September 2016, IPL issued $300 million of 3.7% senior debentures due 2046. The proceeds from the issuance were used by IPL to reduce cash amounts received from its sales of accounts receivable program, reduce commercial paper classified as long-term debt by $100 million and for general corporate purposes. |
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Debt [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Debt | DEBT NOTE 7(a) Short-term Debt - Information regarding commercial paper classified as short-term debt was as follows (dollars in millions):
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Income Taxes |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Income Taxes [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Income Taxes | INCOME TAXES Income Tax Rates - The overall income tax rates shown in the following table were computed by dividing income tax expense (benefit) by income from continuing operations before income taxes.
IPL’s tax benefit riders - Alliant Energy’s and IPL’s effective income tax rates include the impact of reducing income tax expense with offsetting reductions to regulatory liabilities as a result of implementing IPL’s tax benefit riders. Refer to Note 2 for additional details of the tax benefit riders. Deferred Tax Assets and Liabilities - For the nine months ended September 30, 2016, Alliant Energy’s, IPL’s and WPL’s deferred tax liabilities increased $149.4 million, $115.6 million and $103.4 million, respectively. These increases in deferred tax liabilities were primarily due to property-related differences recorded during the nine months ended September 30, 2016. Carryforwards - At September 30, 2016, tax carryforwards and associated deferred tax assets and expiration dates were estimated as follows (dollars in millions):
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Income Taxes [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Income Taxes | INCOME TAXES Income Tax Rates - The overall income tax rates shown in the following table were computed by dividing income tax expense (benefit) by income from continuing operations before income taxes.
IPL’s tax benefit riders - Alliant Energy’s and IPL’s effective income tax rates include the impact of reducing income tax expense with offsetting reductions to regulatory liabilities as a result of implementing IPL’s tax benefit riders. Refer to Note 2 for additional details of the tax benefit riders. Deferred Tax Assets and Liabilities - For the nine months ended September 30, 2016, Alliant Energy’s, IPL’s and WPL’s deferred tax liabilities increased $149.4 million, $115.6 million and $103.4 million, respectively. These increases in deferred tax liabilities were primarily due to property-related differences recorded during the nine months ended September 30, 2016. Carryforwards - At September 30, 2016, tax carryforwards and associated deferred tax assets and expiration dates were estimated as follows (dollars in millions):
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Income Taxes [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Income Taxes | INCOME TAXES Income Tax Rates - The overall income tax rates shown in the following table were computed by dividing income tax expense (benefit) by income from continuing operations before income taxes.
IPL’s tax benefit riders - Alliant Energy’s and IPL’s effective income tax rates include the impact of reducing income tax expense with offsetting reductions to regulatory liabilities as a result of implementing IPL’s tax benefit riders. Refer to Note 2 for additional details of the tax benefit riders. Deferred Tax Assets and Liabilities - For the nine months ended September 30, 2016, Alliant Energy’s, IPL’s and WPL’s deferred tax liabilities increased $149.4 million, $115.6 million and $103.4 million, respectively. These increases in deferred tax liabilities were primarily due to property-related differences recorded during the nine months ended September 30, 2016. Carryforwards - At September 30, 2016, tax carryforwards and associated deferred tax assets and expiration dates were estimated as follows (dollars in millions):
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Benefit Plans |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Benefit Plans | BENEFIT PLANS NOTE 9(a) Pension and Other Postretirement Benefits Plans - Net Periodic Benefit Costs (Credits) - The components of net periodic benefit costs (credits) for sponsored defined benefit pension and OPEB plans for the three and nine months ended September 30 are included in the tables below (in millions). In IPL’s and WPL’s tables below, the defined benefit pension plans costs represent those respective costs for their bargaining unit employees covered under the qualified plans that they sponsor, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Alliant Energy and Corporate Services sponsored qualified and non-qualified defined benefit pension plans. In IPL’s and WPL’s tables below, the OPEB plans costs (credits) represent respective costs (credits) for their employees, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Corporate Services sponsored OPEB plan.
401(k) Savings Plan - A significant number of employees participate in a defined contribution retirement plan (401(k) savings plan). For the three and nine months ended September 30, costs related to the 401(k) savings plan, which are partially based on the participants’ contributions and include allocated costs associated with Corporate Services employees for IPL and WPL, were as follows (in millions):
Voluntary Employee Separation Charges - In the third quarter of 2015, Alliant Energy offered certain employees a voluntary separation package. Approximately 2% of total Alliant Energy employees accepted this package, which resulted in Alliant Energy, IPL and WPL recording charges of $8 million, $5 million and $3 million, respectively, in the third quarter of 2015. NOTE 9(b) Equity-based Compensation Plans - All shares, units and awards included below have been adjusted to reflect the common stock split discussed in Note 6. A summary of compensation expense, including amounts allocated to IPL and WPL, and the related income tax benefits recognized for share-based compensation awards for the three and nine months ended September 30 was as follows (in millions):
As of September 30, 2016, total unrecognized compensation cost related to share-based compensation awards was $8.2 million, which is expected to be recognized over a weighted average period of between one and two years. Share-based compensation expense is recognized on a straight-line basis over the requisite service periods and is primarily recorded in “Other operation and maintenance” in the income statements. Performance Shares and Performance Units - A summary of the performance shares and performance units activity, with amounts representing the target number of awards, was as follows:
Granted Awards - For performance units granted in 2016, the final value is based on the closing market price of one share of Alliant Energy’s common stock at the end of the performance period. Compensation expense for performance shares and performance units is recorded ratably over the performance period based on the fair value of the awards at each reporting period. Vested Awards - During the nine months ended September 30, certain performance shares and performance units vested, resulting in payouts (a combination of cash and common stock for the performance shares and cash only for the performance units) as follows:
Fair Value of Awards - Information related to fair values of nonvested performance shares and performance units at September 30, 2016, by year of grant, was as follows:
Performance Contingent Restricted Stock - A summary of the performance contingent restricted stock activity was as follows:
Performance Restricted Stock Units and Performance Restricted Units - Alliant Energy granted new types of share-based compensation awards to key employees in the first quarter of 2016 referred to as performance restricted stock units, performance restricted units and key employee performance restricted units. Payouts of these units are based on the achievement of certain performance targets (currently specified growth of consolidated income from continuing operations) during the three-year performance period. The actual number of units that will be paid out upon vesting is dependent upon actual performance and may range from zero to 200% of the target number of units. If performance targets are not met during the performance period, these units are forfeited. Subject to achievement of the performance criteria, payouts of nonvested units are prorated in the event of retirement, death or disability during the first year of the performance period based on time worked during the first year of the period, and are prorated upon involuntary termination without cause based on time worked during the entire period. Subject to achievement of the performance criteria, payouts of units to participants who terminate employment after the first year of the performance period due to retirement, death or disability are not prorated. Participants’ nonvested units are forfeited if the participant voluntarily leaves Alliant Energy or is terminated for cause during the performance period. Performance Restricted Stock Units - Performance restricted stock units must be paid out in shares and are accounted for as equity awards. Each performance restricted stock unit’s value is based on the closing market price of one share of Alliant Energy’s common stock on the grant date of the award. A summary of the performance restricted stock units activity, with amounts representing the target number of units, was as follows:
Performance Restricted Units - Performance restricted units must be paid out in cash and are accounted for as liability awards. Each performance restricted unit’s final value is based on the closing market price of one share of Alliant Energy’s common stock at the end of the performance period. Compensation expense is recorded ratably over the performance period based on the fair value of the awards at each reporting period. A summary of the performance restricted units activity, with amounts representing the target number of units, was as follows:
Key Employee Performance Restricted Units - Key employee performance restricted units must be paid out in cash and are accounted for as liability awards. Each key employee performance restricted unit’s final value is based on the closing market price of one share of Alliant Energy’s common stock on the grant date of the award. Compensation expense is recorded ratably over the performance period based on a probability assessment of payouts for the awards at each reporting period. A summary of the key employee performance restricted units activity, with amounts representing the target number of units, was as follows:
Restricted Stock Units and Restricted Units - Alliant Energy granted new types of share-based compensation awards to key employees in the first quarter of 2016 referred to as restricted stock units and restricted units. Payouts of these units are based on the expiration of a three-year time-vesting period. Payouts of nonvested units are prorated in the event of retirement, death or disability during the first year of the time-vesting period based on time worked during the first year of the period, and are prorated upon involuntary termination without cause based on time worked during the entire period. Upon expiration of the time-vesting period, payouts of units to participants who terminate employment after the first year of the period due to retirement, death or disability are not prorated. Participants’ nonvested units are forfeited if the participant voluntarily leaves Alliant Energy or is terminated for cause during the time-vesting period. Each restricted stock unit’s and restricted unit’s final value is based on the closing market price of one share of Alliant Energy’s common stock at the end of the time-vesting period. Compensation expense is recorded ratably over the performance period based on the fair value of the awards at each reporting period. Restricted stock units can be paid out in shares of Alliant Energy common stock, cash or a combination of cash and stock. Restricted units must be paid out in cash. Alliant Energy assumes it will make future payouts of its restricted stock units and restricted units in cash; therefore, restricted stock units and restricted units are accounted for as liability awards. A summary of the restricted stock units and restricted units activity was as follows:
Performance-Contingent Cash Awards - A summary of the performance-contingent cash awards activity was as follows:
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Benefit Plans | BENEFIT PLANS NOTE 9(a) Pension and Other Postretirement Benefits Plans - Net Periodic Benefit Costs (Credits) - The components of net periodic benefit costs (credits) for sponsored defined benefit pension and OPEB plans for the three and nine months ended September 30 are included in the tables below (in millions). In IPL’s and WPL’s tables below, the defined benefit pension plans costs represent those respective costs for their bargaining unit employees covered under the qualified plans that they sponsor, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Alliant Energy and Corporate Services sponsored qualified and non-qualified defined benefit pension plans. In IPL’s and WPL’s tables below, the OPEB plans costs (credits) represent respective costs (credits) for their employees, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Corporate Services sponsored OPEB plan.
401(k) Savings Plan - A significant number of employees participate in a defined contribution retirement plan (401(k) savings plan). For the three and nine months ended September 30, costs related to the 401(k) savings plan, which are partially based on the participants’ contributions and include allocated costs associated with Corporate Services employees for IPL and WPL, were as follows (in millions):
Voluntary Employee Separation Charges - In the third quarter of 2015, Alliant Energy offered certain employees a voluntary separation package. Approximately 2% of total Alliant Energy employees accepted this package, which resulted in Alliant Energy, IPL and WPL recording charges of $8 million, $5 million and $3 million, respectively, in the third quarter of 2015. NOTE 9(b) Equity-based Compensation Plans - All shares, units and awards included below have been adjusted to reflect the common stock split discussed in Note 6. A summary of compensation expense, including amounts allocated to IPL and WPL, and the related income tax benefits recognized for share-based compensation awards for the three and nine months ended September 30 was as follows (in millions):
As of September 30, 2016, total unrecognized compensation cost related to share-based compensation awards was $8.2 million, which is expected to be recognized over a weighted average period of between one and two years. Share-based compensation expense is recognized on a straight-line basis over the requisite service periods and is primarily recorded in “Other operation and maintenance” in the income statements. Performance Shares and Performance Units - A summary of the performance shares and performance units activity, with amounts representing the target number of awards, was as follows:
Granted Awards - For performance units granted in 2016, the final value is based on the closing market price of one share of Alliant Energy’s common stock at the end of the performance period. Compensation expense for performance shares and performance units is recorded ratably over the performance period based on the fair value of the awards at each reporting period. Vested Awards - During the nine months ended September 30, certain performance shares and performance units vested, resulting in payouts (a combination of cash and common stock for the performance shares and cash only for the performance units) as follows:
Fair Value of Awards - Information related to fair values of nonvested performance shares and performance units at September 30, 2016, by year of grant, was as follows:
Performance Contingent Restricted Stock - A summary of the performance contingent restricted stock activity was as follows:
Performance Restricted Stock Units and Performance Restricted Units - Alliant Energy granted new types of share-based compensation awards to key employees in the first quarter of 2016 referred to as performance restricted stock units, performance restricted units and key employee performance restricted units. Payouts of these units are based on the achievement of certain performance targets (currently specified growth of consolidated income from continuing operations) during the three-year performance period. The actual number of units that will be paid out upon vesting is dependent upon actual performance and may range from zero to 200% of the target number of units. If performance targets are not met during the performance period, these units are forfeited. Subject to achievement of the performance criteria, payouts of nonvested units are prorated in the event of retirement, death or disability during the first year of the performance period based on time worked during the first year of the period, and are prorated upon involuntary termination without cause based on time worked during the entire period. Subject to achievement of the performance criteria, payouts of units to participants who terminate employment after the first year of the performance period due to retirement, death or disability are not prorated. Participants’ nonvested units are forfeited if the participant voluntarily leaves Alliant Energy or is terminated for cause during the performance period. Performance Restricted Stock Units - Performance restricted stock units must be paid out in shares and are accounted for as equity awards. Each performance restricted stock unit’s value is based on the closing market price of one share of Alliant Energy’s common stock on the grant date of the award. A summary of the performance restricted stock units activity, with amounts representing the target number of units, was as follows:
Performance Restricted Units - Performance restricted units must be paid out in cash and are accounted for as liability awards. Each performance restricted unit’s final value is based on the closing market price of one share of Alliant Energy’s common stock at the end of the performance period. Compensation expense is recorded ratably over the performance period based on the fair value of the awards at each reporting period. A summary of the performance restricted units activity, with amounts representing the target number of units, was as follows:
Key Employee Performance Restricted Units - Key employee performance restricted units must be paid out in cash and are accounted for as liability awards. Each key employee performance restricted unit’s final value is based on the closing market price of one share of Alliant Energy’s common stock on the grant date of the award. Compensation expense is recorded ratably over the performance period based on a probability assessment of payouts for the awards at each reporting period. A summary of the key employee performance restricted units activity, with amounts representing the target number of units, was as follows:
Restricted Stock Units and Restricted Units - Alliant Energy granted new types of share-based compensation awards to key employees in the first quarter of 2016 referred to as restricted stock units and restricted units. Payouts of these units are based on the expiration of a three-year time-vesting period. Payouts of nonvested units are prorated in the event of retirement, death or disability during the first year of the time-vesting period based on time worked during the first year of the period, and are prorated upon involuntary termination without cause based on time worked during the entire period. Upon expiration of the time-vesting period, payouts of units to participants who terminate employment after the first year of the period due to retirement, death or disability are not prorated. Participants’ nonvested units are forfeited if the participant voluntarily leaves Alliant Energy or is terminated for cause during the time-vesting period. Each restricted stock unit’s and restricted unit’s final value is based on the closing market price of one share of Alliant Energy’s common stock at the end of the time-vesting period. Compensation expense is recorded ratably over the performance period based on the fair value of the awards at each reporting period. Restricted stock units can be paid out in shares of Alliant Energy common stock, cash or a combination of cash and stock. Restricted units must be paid out in cash. Alliant Energy assumes it will make future payouts of its restricted stock units and restricted units in cash; therefore, restricted stock units and restricted units are accounted for as liability awards. A summary of the restricted stock units and restricted units activity was as follows:
Performance-Contingent Cash Awards - A summary of the performance-contingent cash awards activity was as follows:
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Benefit Plans | BENEFIT PLANS NOTE 9(a) Pension and Other Postretirement Benefits Plans - Net Periodic Benefit Costs (Credits) - The components of net periodic benefit costs (credits) for sponsored defined benefit pension and OPEB plans for the three and nine months ended September 30 are included in the tables below (in millions). In IPL’s and WPL’s tables below, the defined benefit pension plans costs represent those respective costs for their bargaining unit employees covered under the qualified plans that they sponsor, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Alliant Energy and Corporate Services sponsored qualified and non-qualified defined benefit pension plans. In IPL’s and WPL’s tables below, the OPEB plans costs (credits) represent respective costs (credits) for their employees, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Corporate Services sponsored OPEB plan.
401(k) Savings Plan - A significant number of employees participate in a defined contribution retirement plan (401(k) savings plan). For the three and nine months ended September 30, costs related to the 401(k) savings plan, which are partially based on the participants’ contributions and include allocated costs associated with Corporate Services employees for IPL and WPL, were as follows (in millions):
Voluntary Employee Separation Charges - In the third quarter of 2015, Alliant Energy offered certain employees a voluntary separation package. Approximately 2% of total Alliant Energy employees accepted this package, which resulted in Alliant Energy, IPL and WPL recording charges of $8 million, $5 million and $3 million, respectively, in the third quarter of 2015. NOTE 9(b) Equity-based Compensation Plans - All shares, units and awards included below have been adjusted to reflect the common stock split discussed in Note 6. A summary of compensation expense, including amounts allocated to IPL and WPL, and the related income tax benefits recognized for share-based compensation awards for the three and nine months ended September 30 was as follows (in millions):
As of September 30, 2016, total unrecognized compensation cost related to share-based compensation awards was $8.2 million, which is expected to be recognized over a weighted average period of between one and two years. Share-based compensation expense is recognized on a straight-line basis over the requisite service periods and is primarily recorded in “Other operation and maintenance” in the income statements. Performance Shares and Performance Units - A summary of the performance shares and performance units activity, with amounts representing the target number of awards, was as follows:
Granted Awards - For performance units granted in 2016, the final value is based on the closing market price of one share of Alliant Energy’s common stock at the end of the performance period. Compensation expense for performance shares and performance units is recorded ratably over the performance period based on the fair value of the awards at each reporting period. Vested Awards - During the nine months ended September 30, certain performance shares and performance units vested, resulting in payouts (a combination of cash and common stock for the performance shares and cash only for the performance units) as follows:
Fair Value of Awards - Information related to fair values of nonvested performance shares and performance units at September 30, 2016, by year of grant, was as follows:
Performance Contingent Restricted Stock - A summary of the performance contingent restricted stock activity was as follows:
Performance Restricted Stock Units and Performance Restricted Units - Alliant Energy granted new types of share-based compensation awards to key employees in the first quarter of 2016 referred to as performance restricted stock units, performance restricted units and key employee performance restricted units. Payouts of these units are based on the achievement of certain performance targets (currently specified growth of consolidated income from continuing operations) during the three-year performance period. The actual number of units that will be paid out upon vesting is dependent upon actual performance and may range from zero to 200% of the target number of units. If performance targets are not met during the performance period, these units are forfeited. Subject to achievement of the performance criteria, payouts of nonvested units are prorated in the event of retirement, death or disability during the first year of the performance period based on time worked during the first year of the period, and are prorated upon involuntary termination without cause based on time worked during the entire period. Subject to achievement of the performance criteria, payouts of units to participants who terminate employment after the first year of the performance period due to retirement, death or disability are not prorated. Participants’ nonvested units are forfeited if the participant voluntarily leaves Alliant Energy or is terminated for cause during the performance period. Performance Restricted Stock Units - Performance restricted stock units must be paid out in shares and are accounted for as equity awards. Each performance restricted stock unit’s value is based on the closing market price of one share of Alliant Energy’s common stock on the grant date of the award. A summary of the performance restricted stock units activity, with amounts representing the target number of units, was as follows:
Performance Restricted Units - Performance restricted units must be paid out in cash and are accounted for as liability awards. Each performance restricted unit’s final value is based on the closing market price of one share of Alliant Energy’s common stock at the end of the performance period. Compensation expense is recorded ratably over the performance period based on the fair value of the awards at each reporting period. A summary of the performance restricted units activity, with amounts representing the target number of units, was as follows:
Key Employee Performance Restricted Units - Key employee performance restricted units must be paid out in cash and are accounted for as liability awards. Each key employee performance restricted unit’s final value is based on the closing market price of one share of Alliant Energy’s common stock on the grant date of the award. Compensation expense is recorded ratably over the performance period based on a probability assessment of payouts for the awards at each reporting period. A summary of the key employee performance restricted units activity, with amounts representing the target number of units, was as follows:
Restricted Stock Units and Restricted Units - Alliant Energy granted new types of share-based compensation awards to key employees in the first quarter of 2016 referred to as restricted stock units and restricted units. Payouts of these units are based on the expiration of a three-year time-vesting period. Payouts of nonvested units are prorated in the event of retirement, death or disability during the first year of the time-vesting period based on time worked during the first year of the period, and are prorated upon involuntary termination without cause based on time worked during the entire period. Upon expiration of the time-vesting period, payouts of units to participants who terminate employment after the first year of the period due to retirement, death or disability are not prorated. Participants’ nonvested units are forfeited if the participant voluntarily leaves Alliant Energy or is terminated for cause during the time-vesting period. Each restricted stock unit’s and restricted unit’s final value is based on the closing market price of one share of Alliant Energy’s common stock at the end of the time-vesting period. Compensation expense is recorded ratably over the performance period based on the fair value of the awards at each reporting period. Restricted stock units can be paid out in shares of Alliant Energy common stock, cash or a combination of cash and stock. Restricted units must be paid out in cash. Alliant Energy assumes it will make future payouts of its restricted stock units and restricted units in cash; therefore, restricted stock units and restricted units are accounted for as liability awards. A summary of the restricted stock units and restricted units activity was as follows:
Performance-Contingent Cash Awards - A summary of the performance-contingent cash awards activity was as follows:
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Asset Retirement Obligations |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Asset Retirement Obligations [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Asset Retirement Obligations | ASSET RETIREMENT OBLIGATIONS A reconciliation of the changes in AROs associated with long-lived assets is as follows (in millions):
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Asset Retirement Obligations [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Asset Retirement Obligations | ASSET RETIREMENT OBLIGATIONS A reconciliation of the changes in AROs associated with long-lived assets is as follows (in millions):
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Asset Retirement Obligations [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Asset Retirement Obligations | ASSET RETIREMENT OBLIGATIONS A reconciliation of the changes in AROs associated with long-lived assets is as follows (in millions):
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Fair Value Measurements |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Fair Value Measurements | FAIR VALUE MEASUREMENTS Valuation Hierarchy - At each reporting date, Level 1 items included IPL’s 5.1% cumulative preferred stock, Level 2 items included certain non-exchange traded commodity contracts and substantially all of the long-term debt instruments, and Level 3 items included FTRs, certain non-exchange traded commodity contracts and IPL’s deferred proceeds. Valuation Techniques - Derivative assets and derivative liabilities - Derivative instruments are periodically used for risk management purposes to mitigate exposures to fluctuations in certain commodity prices, transmission congestion costs and rail transportation costs. Risk policies are maintained that govern the use of such derivative instruments. Derivative instruments were not designated as hedging instruments and included the following:
Swap, option and physical forward commodity contracts were non-exchange-based derivative instruments and were valued using indicative price quotations from a pricing vendor that provides daily exchange forward price settlements, from broker or dealer quotations, from market publications or from on-line exchanges. The indicative price quotations reflected the average of the bid-ask mid-point prices and were obtained from sources believed to provide the most liquid market for the commodity. A portion of these indicative price quotations were corroborated using quoted prices for similar assets or liabilities in active markets and categorized derivative instruments based on such indicative price quotations as Level 2. Commodity contracts that were valued using indicative price quotations based on significant assumptions such as seasonal or monthly shaping and indicative price quotations that could not be readily corroborated were categorized as Level 3. Swap, option and physical forward commodity contracts were predominately at liquid trading points. FTRs were valued using monthly or annual auction shadow prices from relevant auctions and were categorized as Level 3. Refer to Note 12 for additional details of derivative assets and derivative liabilities. The fair value measurements of Level 3 derivative instruments include observable and unobservable inputs. The observable inputs are obtained from third-party pricing sources, counterparties and brokers and include bids, offers, historical transactions (including historical price differences between locations with both observable and unobservable prices) and executed trades. The significant unobservable inputs used in the fair value measurement of commodity contracts are forecasted electricity, natural gas and coal prices, and the expected volatility of such prices. Significant changes in any of those inputs would result in a significantly lower or higher fair value measurement. Deferred proceeds (sales of receivables) - The fair value of IPL’s deferred proceeds related to its sales of accounts receivable program was calculated each reporting date using the cost approach valuation technique. The fair value represents the carrying amount of receivables sold less the allowance for doubtful accounts associated with the receivables sold and cash amounts received from the receivables sold due to the short-term nature of the collection period. These inputs were considered unobservable and deferred proceeds were categorized as Level 3. Deferred proceeds represent IPL’s maximum exposure to loss related to the receivables sold. Refer to Note 4 for additional information regarding deferred proceeds. Long-term debt (including current maturities) - The fair value of long-term debt instruments was based on quoted market prices for similar liabilities at each reporting date or on a discounted cash flow methodology, which utilizes assumptions of current market pricing curves at each reporting date. Refer to Note 7(b) for additional information regarding long-term debt. Cumulative preferred stock - The fair value of IPL’s 5.1% cumulative preferred stock was based on its closing market price quoted by the New York Stock Exchange at each reporting date. Fair Value of Financial Instruments - The carrying amounts of current assets and current liabilities approximate fair value because of the short maturity of such financial instruments. Carrying amounts and related estimated fair values of other financial instruments were as follows (in millions):
Unrealized gains and losses from derivative instruments are generally recorded with offsets to regulatory assets or regulatory liabilities, based on fuel and natural gas cost recovery mechanisms, as well as other specific regulatory authorizations. Based on these recovery mechanisms, the changes in the fair value of derivative liabilities resulted in comparable changes to regulatory assets, and the changes in the fair value of derivative assets resulted in comparable changes to regulatory liabilities. Information for fair value measurements using significant unobservable inputs (Level 3 inputs) was as follows (in millions):
Commodity Contracts - The fair value of electric, natural gas and coal commodity contracts categorized as Level 3 was recognized as net derivative assets (liabilities) as follows (in millions):
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Fair Value Measurements | FAIR VALUE MEASUREMENTS Valuation Hierarchy - At each reporting date, Level 1 items included IPL’s 5.1% cumulative preferred stock, Level 2 items included certain non-exchange traded commodity contracts and substantially all of the long-term debt instruments, and Level 3 items included FTRs, certain non-exchange traded commodity contracts and IPL’s deferred proceeds. Valuation Techniques - Derivative assets and derivative liabilities - Derivative instruments are periodically used for risk management purposes to mitigate exposures to fluctuations in certain commodity prices, transmission congestion costs and rail transportation costs. Risk policies are maintained that govern the use of such derivative instruments. Derivative instruments were not designated as hedging instruments and included the following:
Swap, option and physical forward commodity contracts were non-exchange-based derivative instruments and were valued using indicative price quotations from a pricing vendor that provides daily exchange forward price settlements, from broker or dealer quotations, from market publications or from on-line exchanges. The indicative price quotations reflected the average of the bid-ask mid-point prices and were obtained from sources believed to provide the most liquid market for the commodity. A portion of these indicative price quotations were corroborated using quoted prices for similar assets or liabilities in active markets and categorized derivative instruments based on such indicative price quotations as Level 2. Commodity contracts that were valued using indicative price quotations based on significant assumptions such as seasonal or monthly shaping and indicative price quotations that could not be readily corroborated were categorized as Level 3. Swap, option and physical forward commodity contracts were predominately at liquid trading points. FTRs were valued using monthly or annual auction shadow prices from relevant auctions and were categorized as Level 3. Refer to Note 12 for additional details of derivative assets and derivative liabilities. The fair value measurements of Level 3 derivative instruments include observable and unobservable inputs. The observable inputs are obtained from third-party pricing sources, counterparties and brokers and include bids, offers, historical transactions (including historical price differences between locations with both observable and unobservable prices) and executed trades. The significant unobservable inputs used in the fair value measurement of commodity contracts are forecasted electricity, natural gas and coal prices, and the expected volatility of such prices. Significant changes in any of those inputs would result in a significantly lower or higher fair value measurement. Deferred proceeds (sales of receivables) - The fair value of IPL’s deferred proceeds related to its sales of accounts receivable program was calculated each reporting date using the cost approach valuation technique. The fair value represents the carrying amount of receivables sold less the allowance for doubtful accounts associated with the receivables sold and cash amounts received from the receivables sold due to the short-term nature of the collection period. These inputs were considered unobservable and deferred proceeds were categorized as Level 3. Deferred proceeds represent IPL’s maximum exposure to loss related to the receivables sold. Refer to Note 4 for additional information regarding deferred proceeds. Long-term debt (including current maturities) - The fair value of long-term debt instruments was based on quoted market prices for similar liabilities at each reporting date or on a discounted cash flow methodology, which utilizes assumptions of current market pricing curves at each reporting date. Refer to Note 7(b) for additional information regarding long-term debt. Cumulative preferred stock - The fair value of IPL’s 5.1% cumulative preferred stock was based on its closing market price quoted by the New York Stock Exchange at each reporting date. Fair Value of Financial Instruments - The carrying amounts of current assets and current liabilities approximate fair value because of the short maturity of such financial instruments. Carrying amounts and related estimated fair values of other financial instruments were as follows (in millions):
Unrealized gains and losses from derivative instruments are generally recorded with offsets to regulatory assets or regulatory liabilities, based on fuel and natural gas cost recovery mechanisms, as well as other specific regulatory authorizations. Based on these recovery mechanisms, the changes in the fair value of derivative liabilities resulted in comparable changes to regulatory assets, and the changes in the fair value of derivative assets resulted in comparable changes to regulatory liabilities. Information for fair value measurements using significant unobservable inputs (Level 3 inputs) was as follows (in millions):
Commodity Contracts - The fair value of electric, natural gas and coal commodity contracts categorized as Level 3 was recognized as net derivative assets (liabilities) as follows (in millions):
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Fair Value Measurements | FAIR VALUE MEASUREMENTS Valuation Hierarchy - At each reporting date, Level 1 items included IPL’s 5.1% cumulative preferred stock, Level 2 items included certain non-exchange traded commodity contracts and substantially all of the long-term debt instruments, and Level 3 items included FTRs, certain non-exchange traded commodity contracts and IPL’s deferred proceeds. Valuation Techniques - Derivative assets and derivative liabilities - Derivative instruments are periodically used for risk management purposes to mitigate exposures to fluctuations in certain commodity prices, transmission congestion costs and rail transportation costs. Risk policies are maintained that govern the use of such derivative instruments. Derivative instruments were not designated as hedging instruments and included the following:
Swap, option and physical forward commodity contracts were non-exchange-based derivative instruments and were valued using indicative price quotations from a pricing vendor that provides daily exchange forward price settlements, from broker or dealer quotations, from market publications or from on-line exchanges. The indicative price quotations reflected the average of the bid-ask mid-point prices and were obtained from sources believed to provide the most liquid market for the commodity. A portion of these indicative price quotations were corroborated using quoted prices for similar assets or liabilities in active markets and categorized derivative instruments based on such indicative price quotations as Level 2. Commodity contracts that were valued using indicative price quotations based on significant assumptions such as seasonal or monthly shaping and indicative price quotations that could not be readily corroborated were categorized as Level 3. Swap, option and physical forward commodity contracts were predominately at liquid trading points. FTRs were valued using monthly or annual auction shadow prices from relevant auctions and were categorized as Level 3. Refer to Note 12 for additional details of derivative assets and derivative liabilities. The fair value measurements of Level 3 derivative instruments include observable and unobservable inputs. The observable inputs are obtained from third-party pricing sources, counterparties and brokers and include bids, offers, historical transactions (including historical price differences between locations with both observable and unobservable prices) and executed trades. The significant unobservable inputs used in the fair value measurement of commodity contracts are forecasted electricity, natural gas and coal prices, and the expected volatility of such prices. Significant changes in any of those inputs would result in a significantly lower or higher fair value measurement. Deferred proceeds (sales of receivables) - The fair value of IPL’s deferred proceeds related to its sales of accounts receivable program was calculated each reporting date using the cost approach valuation technique. The fair value represents the carrying amount of receivables sold less the allowance for doubtful accounts associated with the receivables sold and cash amounts received from the receivables sold due to the short-term nature of the collection period. These inputs were considered unobservable and deferred proceeds were categorized as Level 3. Deferred proceeds represent IPL’s maximum exposure to loss related to the receivables sold. Refer to Note 4 for additional information regarding deferred proceeds. Long-term debt (including current maturities) - The fair value of long-term debt instruments was based on quoted market prices for similar liabilities at each reporting date or on a discounted cash flow methodology, which utilizes assumptions of current market pricing curves at each reporting date. Refer to Note 7(b) for additional information regarding long-term debt. Cumulative preferred stock - The fair value of IPL’s 5.1% cumulative preferred stock was based on its closing market price quoted by the New York Stock Exchange at each reporting date. Fair Value of Financial Instruments - The carrying amounts of current assets and current liabilities approximate fair value because of the short maturity of such financial instruments. Carrying amounts and related estimated fair values of other financial instruments were as follows (in millions):
Unrealized gains and losses from derivative instruments are generally recorded with offsets to regulatory assets or regulatory liabilities, based on fuel and natural gas cost recovery mechanisms, as well as other specific regulatory authorizations. Based on these recovery mechanisms, the changes in the fair value of derivative liabilities resulted in comparable changes to regulatory assets, and the changes in the fair value of derivative assets resulted in comparable changes to regulatory liabilities. Information for fair value measurements using significant unobservable inputs (Level 3 inputs) was as follows (in millions):
Commodity Contracts - The fair value of electric, natural gas and coal commodity contracts categorized as Level 3 was recognized as net derivative assets (liabilities) as follows (in millions):
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Derivative Instruments |
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Derivative Instruments | DERIVATIVE INSTRUMENTS Commodity Derivatives - Purpose - Derivative instruments are periodically used for risk management purposes to mitigate exposures to fluctuations in certain commodity prices and transmission congestion costs. Refer to Note 11 for detailed discussion of derivative instruments. Notional Amounts - As of September 30, 2016, gross notional amounts and settlement/delivery years related to outstanding swap contracts, option contracts, physical forward contracts, FTRs, coal contracts and diesel fuel contracts that were accounted for as commodity derivative instruments were as follows (units in thousands):
Financial Statement Presentation - Derivative instruments are recorded at fair value each reporting date on the balance sheets as assets or liabilities. The fair values of current derivative assets are included in “Other current assets,” non-current derivative assets are included in “Deferred charges and other,” current derivative liabilities are included in “Other current liabilities” and non-current derivative liabilities are included in “Other liabilities” on the balance sheets as follows (in millions):
Unrealized gains and losses from commodity derivative instruments were recorded with offsets to regulatory assets or regulatory liabilities on the balance sheets. Refer to Notes 2 and 11 for further discussion. Credit Risk-related Contingent Features - Various agreements contain credit risk-related contingent features, including requirements to maintain certain credit ratings and/or limitations on liability positions under the agreements based on credit ratings. Certain of these agreements with credit risk-related contingency features are accounted for as derivative instruments. In the event of a material change in creditworthiness or if liability positions exceed certain contractual limits, credit support may need to be provided in the form of letters of credit or cash collateral up to the amount of exposure under the contracts, or the contracts may need to be unwound and underlying liability positions paid. At September 30, 2016 and December 31, 2015, the aggregate fair value of all derivative instruments with credit risk-related contingent features in a net liability position was not materially different than amounts that would be required to be posted as credit support to counterparties by Alliant Energy, IPL or WPL if the most restrictive credit risk-related contingent features for derivative agreements in a net liability position were triggered. Balance Sheet Offsetting - The fair value amounts of derivative instruments subject to a master netting arrangement are not netted by counterparty on the balance sheets. However, if the fair value amounts of derivative instruments by counterparty were netted, amounts would not be materially different from gross amounts of derivative assets and derivative liabilities at September 30, 2016 and December 31, 2015. Fair value amounts recognized for the right to reclaim cash collateral (receivable) or the obligation to return cash collateral (payable) are not offset against fair value amounts recognized for derivative instruments executed with the same counterparty under the same master netting arrangement. |
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IPL [Member] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Derivative Instruments | DERIVATIVE INSTRUMENTS Commodity Derivatives - Purpose - Derivative instruments are periodically used for risk management purposes to mitigate exposures to fluctuations in certain commodity prices and transmission congestion costs. Refer to Note 11 for detailed discussion of derivative instruments. Notional Amounts - As of September 30, 2016, gross notional amounts and settlement/delivery years related to outstanding swap contracts, option contracts, physical forward contracts, FTRs, coal contracts and diesel fuel contracts that were accounted for as commodity derivative instruments were as follows (units in thousands):
Financial Statement Presentation - Derivative instruments are recorded at fair value each reporting date on the balance sheets as assets or liabilities. The fair values of current derivative assets are included in “Other current assets,” non-current derivative assets are included in “Deferred charges and other,” current derivative liabilities are included in “Other current liabilities” and non-current derivative liabilities are included in “Other liabilities” on the balance sheets as follows (in millions):
Unrealized gains and losses from commodity derivative instruments were recorded with offsets to regulatory assets or regulatory liabilities on the balance sheets. Refer to Notes 2 and 11 for further discussion. Credit Risk-related Contingent Features - Various agreements contain credit risk-related contingent features, including requirements to maintain certain credit ratings and/or limitations on liability positions under the agreements based on credit ratings. Certain of these agreements with credit risk-related contingency features are accounted for as derivative instruments. In the event of a material change in creditworthiness or if liability positions exceed certain contractual limits, credit support may need to be provided in the form of letters of credit or cash collateral up to the amount of exposure under the contracts, or the contracts may need to be unwound and underlying liability positions paid. At September 30, 2016 and December 31, 2015, the aggregate fair value of all derivative instruments with credit risk-related contingent features in a net liability position was not materially different than amounts that would be required to be posted as credit support to counterparties by Alliant Energy, IPL or WPL if the most restrictive credit risk-related contingent features for derivative agreements in a net liability position were triggered. Balance Sheet Offsetting - The fair value amounts of derivative instruments subject to a master netting arrangement are not netted by counterparty on the balance sheets. However, if the fair value amounts of derivative instruments by counterparty were netted, amounts would not be materially different from gross amounts of derivative assets and derivative liabilities at September 30, 2016 and December 31, 2015. Fair value amounts recognized for the right to reclaim cash collateral (receivable) or the obligation to return cash collateral (payable) are not offset against fair value amounts recognized for derivative instruments executed with the same counterparty under the same master netting arrangement. |
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WPL [Member] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Derivative Instruments | DERIVATIVE INSTRUMENTS Commodity Derivatives - Purpose - Derivative instruments are periodically used for risk management purposes to mitigate exposures to fluctuations in certain commodity prices and transmission congestion costs. Refer to Note 11 for detailed discussion of derivative instruments. Notional Amounts - As of September 30, 2016, gross notional amounts and settlement/delivery years related to outstanding swap contracts, option contracts, physical forward contracts, FTRs, coal contracts and diesel fuel contracts that were accounted for as commodity derivative instruments were as follows (units in thousands):
Financial Statement Presentation - Derivative instruments are recorded at fair value each reporting date on the balance sheets as assets or liabilities. The fair values of current derivative assets are included in “Other current assets,” non-current derivative assets are included in “Deferred charges and other,” current derivative liabilities are included in “Other current liabilities” and non-current derivative liabilities are included in “Other liabilities” on the balance sheets as follows (in millions):
Unrealized gains and losses from commodity derivative instruments were recorded with offsets to regulatory assets or regulatory liabilities on the balance sheets. Refer to Notes 2 and 11 for further discussion. Credit Risk-related Contingent Features - Various agreements contain credit risk-related contingent features, including requirements to maintain certain credit ratings and/or limitations on liability positions under the agreements based on credit ratings. Certain of these agreements with credit risk-related contingency features are accounted for as derivative instruments. In the event of a material change in creditworthiness or if liability positions exceed certain contractual limits, credit support may need to be provided in the form of letters of credit or cash collateral up to the amount of exposure under the contracts, or the contracts may need to be unwound and underlying liability positions paid. At September 30, 2016 and December 31, 2015, the aggregate fair value of all derivative instruments with credit risk-related contingent features in a net liability position was not materially different than amounts that would be required to be posted as credit support to counterparties by Alliant Energy, IPL or WPL if the most restrictive credit risk-related contingent features for derivative agreements in a net liability position were triggered. Balance Sheet Offsetting - The fair value amounts of derivative instruments subject to a master netting arrangement are not netted by counterparty on the balance sheets. However, if the fair value amounts of derivative instruments by counterparty were netted, amounts would not be materially different from gross amounts of derivative assets and derivative liabilities at September 30, 2016 and December 31, 2015. Fair value amounts recognized for the right to reclaim cash collateral (receivable) or the obligation to return cash collateral (payable) are not offset against fair value amounts recognized for derivative instruments executed with the same counterparty under the same master netting arrangement. |
Commitments And Contingencies |
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Commitments and Contingencies Disclosure | COMMITMENTS AND CONTINGENCIES NOTE 13(a) Capital Purchase Obligations - Various contractual obligations contain minimum future commitments related to capital expenditures for certain construction projects. IPL’s projects include the installation of an SCR system at Ottumwa Unit 1 to reduce NOx emissions at the EGU. WPL’s projects include the Riverside expansion, the installation of an SCR system at Columbia Unit 2 to reduce NOx emissions at the EGU, and generation maintenance and performance improvements at Columbia Units 1 and 2. At September 30, 2016, Alliant Energy’s, IPL’s and WPL’s minimum future commitments related to certain contractual obligations for these projects were $27 million, $1 million and $26 million, respectively. NOTE 13(b) Operating Expense Purchase Obligations - Various commodity supply, transportation and storage contracts help meet obligations to provide electricity and natural gas to utility customers. Other operating expense purchase obligations with various vendors provide other goods and services. At September 30, 2016, minimum future commitments related to these operating expense purchase obligations were as follows (in millions):
NOTE 13(c) Legal Proceedings - Flood Damage Claims - In 2013, several plaintiffs purporting to represent a class of residential and commercial property owners filed a complaint against CRANDIC, Alliant Energy and various other defendants in the Iowa District Court for Linn County. Plaintiffs assert claims of negligence and strict liability based on their allegations that CRANDIC (along with other defendants) caused or exacerbated flooding of the Cedar River in June 2008. In February 2016, the Iowa District Court for Linn County ruled in favor of Alliant Energy and CRANDIC and dismissed all claims against them, resulting in no loss. In August 2016, the Iowa District Court for Linn County dismissed all claims against the remaining defendants. In September 2016, plaintiffs filed a notice of appeal with the Supreme Court of Iowa. Alliant Energy does not currently believe any material losses for this complaint are both probable and reasonably estimated, and therefore has not recognized any material loss contingency amounts as of September 30, 2016. NOTE 13(d) Guarantees and Indemnifications - RMT - In 2013, Alliant Energy sold RMT. RMT provided renewable energy services, including construction and high voltage connection services for wind and solar projects. As part of the sale, Alliant Energy indemnified the buyer for any claims, including claims of warranty under the project obligations that were commenced or are based on actions that occurred prior to the sale, except for liabilities already accounted for through adjustments to the purchase price. The indemnification obligations either cease to exist when the statute of limitation for such claims is met or, in the case of RMT’s projects, when the warranty period under the agreements expires. The contractual warranty periods for RMT’s projects generally range from 12 to 60 months with the latest expiring in 2016. Limited warranties may be extended in certain cases for warranty work performed. Alliant Energy also continues to guarantee RMT’s performance obligations related to certain of RMT’s projects that were commenced prior to Alliant Energy’s sale of RMT. As of September 30, 2016, Alliant Energy had $123 million of performance guarantees outstanding, with $48 million and $75 million currently expected to expire in 2016 and 2017, respectively. The expiration of these performance guarantees may be extended depending on when all valid warranty claims are resolved for the respective projects. Although Alliant Energy has received warranty claims related to certain of these projects, it does not currently believe that material losses are both probable and reasonably estimated, and therefore, has not recognized any material liabilities related to these matters as of September 30, 2016. Alliant Energy does not currently believe that the range of future potential loss from any warranty claims will be material. Refer to Note 16 for further discussion of RMT, including amounts Alliant Energy recorded to “Operating expenses” during the nine months ended September 30, 2016 and 2015 related to certain warranty claims. Whiting Petroleum - In 2004, Alliant Energy sold its remaining interest in Whiting Petroleum. Whiting Petroleum is an independent oil and gas company. Resources, as the successor to a predecessor entity that owned Whiting Petroleum, continues to guarantee the partnership obligations of an affiliate of Whiting Petroleum under general partnership agreements in the oil and gas industry, including with respect to the future abandonment of certain platforms off the coast of California and related onshore plant and equipment owned by the partnerships. The guarantees do not include a maximum limit. As of September 30, 2016, the present value of the abandonment obligations is estimated at $30 million. Alliant Energy is not aware of any material liabilities related to these guarantees of which it is probable that Resources will be obligated to pay and therefore has not recognized any material liabilities related to this guarantee as of September 30, 2016. IPL’s Minnesota Electric Distribution Assets - IPL provided indemnifications associated with the July 2015 sale of its Minnesota electric distribution assets for losses resulting from potential breach of IPL’s representations, warranties and obligations under the sale agreement. Alliant Energy and IPL believe the likelihood of having to make any material cash payments under these indemnifications is remote. IPL has not recorded any material liabilities related to these indemnifications as of September 30, 2016. The general terms of the indemnifications provided by IPL included a maximum limit of $17 million and expire in October 2020. NOTE 13(e) Environmental Matters - MGP Sites - IPL and WPL have current or previous ownership interests in various sites that are previously associated with the production of gas for which IPL and WPL have, or may have in the future, liability for investigation, remediation and monitoring costs. IPL and WPL are working pursuant to the requirements of various federal and state agencies to investigate, mitigate, prevent and remediate, where necessary, the environmental impacts to property, including natural resources, at and around these former MGP sites in order to protect public health and the environment. IPL and WPL are currently monitoring and/or remediating 23 and 5 sites, respectively. Environmental liabilities related to the MGP sites are recorded based upon periodic studies. Such amounts are based on the best current estimate of the remaining amount to be incurred for investigation, remediation and monitoring costs for those sites where the investigation process has been or is substantially completed, and the minimum of the estimated cost range for those sites where the investigation is in its earlier stages. There are inherent uncertainties associated with the estimated remaining costs for MGP projects primarily due to unknown site conditions and potential changes in regulatory agency requirements. It is possible that future cost estimates will be greater than current estimates as the investigation process proceeds and as additional facts become known. The amounts recognized as liabilities are reduced for expenditures incurred and are adjusted as further information develops or circumstances change. Costs of future expenditures for environmental remediation obligations are not discounted. At September 30, 2016, estimated future costs expected to be incurred for the investigation, remediation and monitoring of the MGP sites, as well as environmental liabilities recorded on the balance sheets for these sites, were as follows (in millions):
WPL Consent Decree - In 2013, the U.S. District Court for the Western District of Wisconsin approved a Consent Decree that WPL, along with the other owners of Edgewater and Columbia, entered into with the EPA and the Sierra Club, thereby resolving claims against WPL. Such claims included allegations that the owners of Edgewater, Nelson Dewey and Columbia violated the Prevention of Significant Deterioration program requirements, Title V Operating Permit requirements of the CAA and the Wisconsin State Implementation Plan designed to implement the CAA. WPL has completed various requirements under the Consent Decree. WPL’s remaining requirements include installing an SCR system at Columbia Unit 2 by December 31, 2018. WPL is also required to fuel switch or retire Edgewater Unit 4 by December 31, 2018. In addition, the Consent Decree establishes emission rate limits for SO2, NOx and particulate matter for Columbia Units 1 and 2, and Edgewater Units 4 and 5. The Consent Decree also includes annual plant-wide emission caps for SO2 and NOx for Columbia and Edgewater. WPL is in the process of completing approximately $7 million in environmental mitigation projects. Alliant Energy and WPL currently expect to recover material costs incurred by WPL related to compliance with the terms of the Consent Decree from WPL’s electric customers. The recovery of such costs will be decided by the PSCW in future rate cases or other proceedings. IPL Consent Decree - In 2015, the U.S. District Court for the Northern District of Iowa approved a Consent Decree that IPL entered into with the EPA, the Sierra Club, the State of Iowa and Linn County in Iowa, thereby resolving potential CAA issues associated with emissions from IPL’s coal-fired generating facilities in Iowa. IPL has completed various requirements under the Consent Decree. IPL’s remaining requirements include installing an SCR system or equivalent NOx reduction system at the Ottumwa Generating Station by December 31, 2019; fuel switching or retiring Prairie Creek Unit 4 by June 1, 2018, the Burlington Generating Station by December 31, 2021 and Prairie Creek Units 1 and 3 by December 31, 2025; and either installing combined cycle technology at, or retiring, the Dubuque and Sutherland Generating Stations by June 1, 2019. The Consent Decree also establishes SO2, NOx and particulate matter emission rate limits with varying averaging times for the Burlington, Lansing, M.L. Kapp, Ottumwa and Prairie Creek Generating Stations. In addition, the Consent Decree includes calendar-year SO2 and NOx emission caps for the Prairie Creek Generating Station, and calendar-year SO2 and NOx emission caps in aggregate for the Burlington, Dubuque, Lansing, M.L. Kapp, Ottumwa, Prairie Creek and Sutherland Generating Stations. IPL will also complete approximately $6 million in environmental mitigation projects. Alliant Energy and IPL currently expect to recover material costs incurred by IPL related to the environmental control systems and environmental mitigation projects from IPL’s electric customers. The recovery of such costs will be decided by IPL’s regulators in future rate cases or other proceedings. Other Environmental Contingencies - In addition to the environmental liabilities discussed above, various environmental rules are monitored that may have a significant impact on future operations. Several of these environmental rules are subject to legal challenges, reconsideration and/or other uncertainties. Given uncertainties regarding the outcome, timing and compliance plans for these environmental matters, the complete financial impact of each of these rules is not able to be determined; however future capital investments and/or modifications to EGUs to comply with certain of these rules could be significant. Specific current, proposed or potential environmental matters include, among others: Cross-State Air Pollution Rule, Ozone NAAQS Rule, Federal Clean Water Act including Section 316(b), Effluent Limitation Guidelines, Hydroelectric Fish Passage Device, CCR Rule, and various legislation and EPA regulations to monitor and regulate the emission of greenhouse gases, including carbon emissions from new (CAA Section 111(b)) and existing (CAA Section 111(d)) fossil-fueled EGUs. |
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Commitments and Contingencies Disclosure | COMMITMENTS AND CONTINGENCIES NOTE 13(a) Capital Purchase Obligations - Various contractual obligations contain minimum future commitments related to capital expenditures for certain construction projects. IPL’s projects include the installation of an SCR system at Ottumwa Unit 1 to reduce NOx emissions at the EGU. WPL’s projects include the Riverside expansion, the installation of an SCR system at Columbia Unit 2 to reduce NOx emissions at the EGU, and generation maintenance and performance improvements at Columbia Units 1 and 2. At September 30, 2016, Alliant Energy’s, IPL’s and WPL’s minimum future commitments related to certain contractual obligations for these projects were $27 million, $1 million and $26 million, respectively. NOTE 13(b) Operating Expense Purchase Obligations - Various commodity supply, transportation and storage contracts help meet obligations to provide electricity and natural gas to utility customers. Other operating expense purchase obligations with various vendors provide other goods and services. At September 30, 2016, minimum future commitments related to these operating expense purchase obligations were as follows (in millions):
NOTE 13(c) Legal Proceedings - Flood Damage Claims - In 2013, several plaintiffs purporting to represent a class of residential and commercial property owners filed a complaint against CRANDIC, Alliant Energy and various other defendants in the Iowa District Court for Linn County. Plaintiffs assert claims of negligence and strict liability based on their allegations that CRANDIC (along with other defendants) caused or exacerbated flooding of the Cedar River in June 2008. In February 2016, the Iowa District Court for Linn County ruled in favor of Alliant Energy and CRANDIC and dismissed all claims against them, resulting in no loss. In August 2016, the Iowa District Court for Linn County dismissed all claims against the remaining defendants. In September 2016, plaintiffs filed a notice of appeal with the Supreme Court of Iowa. Alliant Energy does not currently believe any material losses for this complaint are both probable and reasonably estimated, and therefore has not recognized any material loss contingency amounts as of September 30, 2016. NOTE 13(d) Guarantees and Indemnifications - RMT - In 2013, Alliant Energy sold RMT. RMT provided renewable energy services, including construction and high voltage connection services for wind and solar projects. As part of the sale, Alliant Energy indemnified the buyer for any claims, including claims of warranty under the project obligations that were commenced or are based on actions that occurred prior to the sale, except for liabilities already accounted for through adjustments to the purchase price. The indemnification obligations either cease to exist when the statute of limitation for such claims is met or, in the case of RMT’s projects, when the warranty period under the agreements expires. The contractual warranty periods for RMT’s projects generally range from 12 to 60 months with the latest expiring in 2016. Limited warranties may be extended in certain cases for warranty work performed. Alliant Energy also continues to guarantee RMT’s performance obligations related to certain of RMT’s projects that were commenced prior to Alliant Energy’s sale of RMT. As of September 30, 2016, Alliant Energy had $123 million of performance guarantees outstanding, with $48 million and $75 million currently expected to expire in 2016 and 2017, respectively. The expiration of these performance guarantees may be extended depending on when all valid warranty claims are resolved for the respective projects. Although Alliant Energy has received warranty claims related to certain of these projects, it does not currently believe that material losses are both probable and reasonably estimated, and therefore, has not recognized any material liabilities related to these matters as of September 30, 2016. Alliant Energy does not currently believe that the range of future potential loss from any warranty claims will be material. Refer to Note 16 for further discussion of RMT, including amounts Alliant Energy recorded to “Operating expenses” during the nine months ended September 30, 2016 and 2015 related to certain warranty claims. Whiting Petroleum - In 2004, Alliant Energy sold its remaining interest in Whiting Petroleum. Whiting Petroleum is an independent oil and gas company. Resources, as the successor to a predecessor entity that owned Whiting Petroleum, continues to guarantee the partnership obligations of an affiliate of Whiting Petroleum under general partnership agreements in the oil and gas industry, including with respect to the future abandonment of certain platforms off the coast of California and related onshore plant and equipment owned by the partnerships. The guarantees do not include a maximum limit. As of September 30, 2016, the present value of the abandonment obligations is estimated at $30 million. Alliant Energy is not aware of any material liabilities related to these guarantees of which it is probable that Resources will be obligated to pay and therefore has not recognized any material liabilities related to this guarantee as of September 30, 2016. IPL’s Minnesota Electric Distribution Assets - IPL provided indemnifications associated with the July 2015 sale of its Minnesota electric distribution assets for losses resulting from potential breach of IPL’s representations, warranties and obligations under the sale agreement. Alliant Energy and IPL believe the likelihood of having to make any material cash payments under these indemnifications is remote. IPL has not recorded any material liabilities related to these indemnifications as of September 30, 2016. The general terms of the indemnifications provided by IPL included a maximum limit of $17 million and expire in October 2020. NOTE 13(e) Environmental Matters - MGP Sites - IPL and WPL have current or previous ownership interests in various sites that are previously associated with the production of gas for which IPL and WPL have, or may have in the future, liability for investigation, remediation and monitoring costs. IPL and WPL are working pursuant to the requirements of various federal and state agencies to investigate, mitigate, prevent and remediate, where necessary, the environmental impacts to property, including natural resources, at and around these former MGP sites in order to protect public health and the environment. IPL and WPL are currently monitoring and/or remediating 23 and 5 sites, respectively. Environmental liabilities related to the MGP sites are recorded based upon periodic studies. Such amounts are based on the best current estimate of the remaining amount to be incurred for investigation, remediation and monitoring costs for those sites where the investigation process has been or is substantially completed, and the minimum of the estimated cost range for those sites where the investigation is in its earlier stages. There are inherent uncertainties associated with the estimated remaining costs for MGP projects primarily due to unknown site conditions and potential changes in regulatory agency requirements. It is possible that future cost estimates will be greater than current estimates as the investigation process proceeds and as additional facts become known. The amounts recognized as liabilities are reduced for expenditures incurred and are adjusted as further information develops or circumstances change. Costs of future expenditures for environmental remediation obligations are not discounted. At September 30, 2016, estimated future costs expected to be incurred for the investigation, remediation and monitoring of the MGP sites, as well as environmental liabilities recorded on the balance sheets for these sites, were as follows (in millions):
WPL Consent Decree - In 2013, the U.S. District Court for the Western District of Wisconsin approved a Consent Decree that WPL, along with the other owners of Edgewater and Columbia, entered into with the EPA and the Sierra Club, thereby resolving claims against WPL. Such claims included allegations that the owners of Edgewater, Nelson Dewey and Columbia violated the Prevention of Significant Deterioration program requirements, Title V Operating Permit requirements of the CAA and the Wisconsin State Implementation Plan designed to implement the CAA. WPL has completed various requirements under the Consent Decree. WPL’s remaining requirements include installing an SCR system at Columbia Unit 2 by December 31, 2018. WPL is also required to fuel switch or retire Edgewater Unit 4 by December 31, 2018. In addition, the Consent Decree establishes emission rate limits for SO2, NOx and particulate matter for Columbia Units 1 and 2, and Edgewater Units 4 and 5. The Consent Decree also includes annual plant-wide emission caps for SO2 and NOx for Columbia and Edgewater. WPL is in the process of completing approximately $7 million in environmental mitigation projects. Alliant Energy and WPL currently expect to recover material costs incurred by WPL related to compliance with the terms of the Consent Decree from WPL’s electric customers. The recovery of such costs will be decided by the PSCW in future rate cases or other proceedings. IPL Consent Decree - In 2015, the U.S. District Court for the Northern District of Iowa approved a Consent Decree that IPL entered into with the EPA, the Sierra Club, the State of Iowa and Linn County in Iowa, thereby resolving potential CAA issues associated with emissions from IPL’s coal-fired generating facilities in Iowa. IPL has completed various requirements under the Consent Decree. IPL’s remaining requirements include installing an SCR system or equivalent NOx reduction system at the Ottumwa Generating Station by December 31, 2019; fuel switching or retiring Prairie Creek Unit 4 by June 1, 2018, the Burlington Generating Station by December 31, 2021 and Prairie Creek Units 1 and 3 by December 31, 2025; and either installing combined cycle technology at, or retiring, the Dubuque and Sutherland Generating Stations by June 1, 2019. The Consent Decree also establishes SO2, NOx and particulate matter emission rate limits with varying averaging times for the Burlington, Lansing, M.L. Kapp, Ottumwa and Prairie Creek Generating Stations. In addition, the Consent Decree includes calendar-year SO2 and NOx emission caps for the Prairie Creek Generating Station, and calendar-year SO2 and NOx emission caps in aggregate for the Burlington, Dubuque, Lansing, M.L. Kapp, Ottumwa, Prairie Creek and Sutherland Generating Stations. IPL will also complete approximately $6 million in environmental mitigation projects. Alliant Energy and IPL currently expect to recover material costs incurred by IPL related to the environmental control systems and environmental mitigation projects from IPL’s electric customers. The recovery of such costs will be decided by IPL’s regulators in future rate cases or other proceedings. Other Environmental Contingencies - In addition to the environmental liabilities discussed above, various environmental rules are monitored that may have a significant impact on future operations. Several of these environmental rules are subject to legal challenges, reconsideration and/or other uncertainties. Given uncertainties regarding the outcome, timing and compliance plans for these environmental matters, the complete financial impact of each of these rules is not able to be determined; however future capital investments and/or modifications to EGUs to comply with certain of these rules could be significant. Specific current, proposed or potential environmental matters include, among others: Cross-State Air Pollution Rule, Ozone NAAQS Rule, Federal Clean Water Act including Section 316(b), Effluent Limitation Guidelines, Hydroelectric Fish Passage Device, CCR Rule, and various legislation and EPA regulations to monitor and regulate the emission of greenhouse gases, including carbon emissions from new (CAA Section 111(b)) and existing (CAA Section 111(d)) fossil-fueled EGUs. |
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Commitments and Contingencies Disclosure | COMMITMENTS AND CONTINGENCIES NOTE 13(a) Capital Purchase Obligations - Various contractual obligations contain minimum future commitments related to capital expenditures for certain construction projects. IPL’s projects include the installation of an SCR system at Ottumwa Unit 1 to reduce NOx emissions at the EGU. WPL’s projects include the Riverside expansion, the installation of an SCR system at Columbia Unit 2 to reduce NOx emissions at the EGU, and generation maintenance and performance improvements at Columbia Units 1 and 2. At September 30, 2016, Alliant Energy’s, IPL’s and WPL’s minimum future commitments related to certain contractual obligations for these projects were $27 million, $1 million and $26 million, respectively. NOTE 13(b) Operating Expense Purchase Obligations - Various commodity supply, transportation and storage contracts help meet obligations to provide electricity and natural gas to utility customers. Other operating expense purchase obligations with various vendors provide other goods and services. At September 30, 2016, minimum future commitments related to these operating expense purchase obligations were as follows (in millions):
NOTE 13(c) Legal Proceedings - Flood Damage Claims - In 2013, several plaintiffs purporting to represent a class of residential and commercial property owners filed a complaint against CRANDIC, Alliant Energy and various other defendants in the Iowa District Court for Linn County. Plaintiffs assert claims of negligence and strict liability based on their allegations that CRANDIC (along with other defendants) caused or exacerbated flooding of the Cedar River in June 2008. In February 2016, the Iowa District Court for Linn County ruled in favor of Alliant Energy and CRANDIC and dismissed all claims against them, resulting in no loss. In August 2016, the Iowa District Court for Linn County dismissed all claims against the remaining defendants. In September 2016, plaintiffs filed a notice of appeal with the Supreme Court of Iowa. Alliant Energy does not currently believe any material losses for this complaint are both probable and reasonably estimated, and therefore has not recognized any material loss contingency amounts as of September 30, 2016. NOTE 13(d) Guarantees and Indemnifications - RMT - In 2013, Alliant Energy sold RMT. RMT provided renewable energy services, including construction and high voltage connection services for wind and solar projects. As part of the sale, Alliant Energy indemnified the buyer for any claims, including claims of warranty under the project obligations that were commenced or are based on actions that occurred prior to the sale, except for liabilities already accounted for through adjustments to the purchase price. The indemnification obligations either cease to exist when the statute of limitation for such claims is met or, in the case of RMT’s projects, when the warranty period under the agreements expires. The contractual warranty periods for RMT’s projects generally range from 12 to 60 months with the latest expiring in 2016. Limited warranties may be extended in certain cases for warranty work performed. Alliant Energy also continues to guarantee RMT’s performance obligations related to certain of RMT’s projects that were commenced prior to Alliant Energy’s sale of RMT. As of September 30, 2016, Alliant Energy had $123 million of performance guarantees outstanding, with $48 million and $75 million currently expected to expire in 2016 and 2017, respectively. The expiration of these performance guarantees may be extended depending on when all valid warranty claims are resolved for the respective projects. Although Alliant Energy has received warranty claims related to certain of these projects, it does not currently believe that material losses are both probable and reasonably estimated, and therefore, has not recognized any material liabilities related to these matters as of September 30, 2016. Alliant Energy does not currently believe that the range of future potential loss from any warranty claims will be material. Refer to Note 16 for further discussion of RMT, including amounts Alliant Energy recorded to “Operating expenses” during the nine months ended September 30, 2016 and 2015 related to certain warranty claims. Whiting Petroleum - In 2004, Alliant Energy sold its remaining interest in Whiting Petroleum. Whiting Petroleum is an independent oil and gas company. Resources, as the successor to a predecessor entity that owned Whiting Petroleum, continues to guarantee the partnership obligations of an affiliate of Whiting Petroleum under general partnership agreements in the oil and gas industry, including with respect to the future abandonment of certain platforms off the coast of California and related onshore plant and equipment owned by the partnerships. The guarantees do not include a maximum limit. As of September 30, 2016, the present value of the abandonment obligations is estimated at $30 million. Alliant Energy is not aware of any material liabilities related to these guarantees of which it is probable that Resources will be obligated to pay and therefore has not recognized any material liabilities related to this guarantee as of September 30, 2016. IPL’s Minnesota Electric Distribution Assets - IPL provided indemnifications associated with the July 2015 sale of its Minnesota electric distribution assets for losses resulting from potential breach of IPL’s representations, warranties and obligations under the sale agreement. Alliant Energy and IPL believe the likelihood of having to make any material cash payments under these indemnifications is remote. IPL has not recorded any material liabilities related to these indemnifications as of September 30, 2016. The general terms of the indemnifications provided by IPL included a maximum limit of $17 million and expire in October 2020. NOTE 13(e) Environmental Matters - MGP Sites - IPL and WPL have current or previous ownership interests in various sites that are previously associated with the production of gas for which IPL and WPL have, or may have in the future, liability for investigation, remediation and monitoring costs. IPL and WPL are working pursuant to the requirements of various federal and state agencies to investigate, mitigate, prevent and remediate, where necessary, the environmental impacts to property, including natural resources, at and around these former MGP sites in order to protect public health and the environment. IPL and WPL are currently monitoring and/or remediating 23 and 5 sites, respectively. Environmental liabilities related to the MGP sites are recorded based upon periodic studies. Such amounts are based on the best current estimate of the remaining amount to be incurred for investigation, remediation and monitoring costs for those sites where the investigation process has been or is substantially completed, and the minimum of the estimated cost range for those sites where the investigation is in its earlier stages. There are inherent uncertainties associated with the estimated remaining costs for MGP projects primarily due to unknown site conditions and potential changes in regulatory agency requirements. It is possible that future cost estimates will be greater than current estimates as the investigation process proceeds and as additional facts become known. The amounts recognized as liabilities are reduced for expenditures incurred and are adjusted as further information develops or circumstances change. Costs of future expenditures for environmental remediation obligations are not discounted. At September 30, 2016, estimated future costs expected to be incurred for the investigation, remediation and monitoring of the MGP sites, as well as environmental liabilities recorded on the balance sheets for these sites, were as follows (in millions):
WPL Consent Decree - In 2013, the U.S. District Court for the Western District of Wisconsin approved a Consent Decree that WPL, along with the other owners of Edgewater and Columbia, entered into with the EPA and the Sierra Club, thereby resolving claims against WPL. Such claims included allegations that the owners of Edgewater, Nelson Dewey and Columbia violated the Prevention of Significant Deterioration program requirements, Title V Operating Permit requirements of the CAA and the Wisconsin State Implementation Plan designed to implement the CAA. WPL has completed various requirements under the Consent Decree. WPL’s remaining requirements include installing an SCR system at Columbia Unit 2 by December 31, 2018. WPL is also required to fuel switch or retire Edgewater Unit 4 by December 31, 2018. In addition, the Consent Decree establishes emission rate limits for SO2, NOx and particulate matter for Columbia Units 1 and 2, and Edgewater Units 4 and 5. The Consent Decree also includes annual plant-wide emission caps for SO2 and NOx for Columbia and Edgewater. WPL is in the process of completing approximately $7 million in environmental mitigation projects. Alliant Energy and WPL currently expect to recover material costs incurred by WPL related to compliance with the terms of the Consent Decree from WPL’s electric customers. The recovery of such costs will be decided by the PSCW in future rate cases or other proceedings. IPL Consent Decree - In 2015, the U.S. District Court for the Northern District of Iowa approved a Consent Decree that IPL entered into with the EPA, the Sierra Club, the State of Iowa and Linn County in Iowa, thereby resolving potential CAA issues associated with emissions from IPL’s coal-fired generating facilities in Iowa. IPL has completed various requirements under the Consent Decree. IPL’s remaining requirements include installing an SCR system or equivalent NOx reduction system at the Ottumwa Generating Station by December 31, 2019; fuel switching or retiring Prairie Creek Unit 4 by June 1, 2018, the Burlington Generating Station by December 31, 2021 and Prairie Creek Units 1 and 3 by December 31, 2025; and either installing combined cycle technology at, or retiring, the Dubuque and Sutherland Generating Stations by June 1, 2019. The Consent Decree also establishes SO2, NOx and particulate matter emission rate limits with varying averaging times for the Burlington, Lansing, M.L. Kapp, Ottumwa and Prairie Creek Generating Stations. In addition, the Consent Decree includes calendar-year SO2 and NOx emission caps for the Prairie Creek Generating Station, and calendar-year SO2 and NOx emission caps in aggregate for the Burlington, Dubuque, Lansing, M.L. Kapp, Ottumwa, Prairie Creek and Sutherland Generating Stations. IPL will also complete approximately $6 million in environmental mitigation projects. Alliant Energy and IPL currently expect to recover material costs incurred by IPL related to the environmental control systems and environmental mitigation projects from IPL’s electric customers. The recovery of such costs will be decided by IPL’s regulators in future rate cases or other proceedings. Other Environmental Contingencies - In addition to the environmental liabilities discussed above, various environmental rules are monitored that may have a significant impact on future operations. Several of these environmental rules are subject to legal challenges, reconsideration and/or other uncertainties. Given uncertainties regarding the outcome, timing and compliance plans for these environmental matters, the complete financial impact of each of these rules is not able to be determined; however future capital investments and/or modifications to EGUs to comply with certain of these rules could be significant. Specific current, proposed or potential environmental matters include, among others: Cross-State Air Pollution Rule, Ozone NAAQS Rule, Federal Clean Water Act including Section 316(b), Effluent Limitation Guidelines, Hydroelectric Fish Passage Device, CCR Rule, and various legislation and EPA regulations to monitor and regulate the emission of greenhouse gases, including carbon emissions from new (CAA Section 111(b)) and existing (CAA Section 111(d)) fossil-fueled EGUs. |
Segments Of Business |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Segments Of Business | SEGMENTS OF BUSINESS Alliant Energy - Certain financial information relating to Alliant Energy’s business segments is as follows. Intersegment revenues were not material to Alliant Energy’s operations. Refer to Note 3 for discussion of asset valuation charges recorded in the third quarter of 2016 related to the Franklin County wind farm, which decreased the assets for “Non-Regulated, Parent and Other.”
IPL - Certain financial information relating to IPL’s business segments is as follows. Intersegment revenues were not material to IPL’s operations.
WPL - Certain financial information relating to WPL’s business segments is as follows. Intersegment revenues were not material to WPL’s operations.
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Segments Of Business | SEGMENTS OF BUSINESS Alliant Energy - Certain financial information relating to Alliant Energy’s business segments is as follows. Intersegment revenues were not material to Alliant Energy’s operations. Refer to Note 3 for discussion of asset valuation charges recorded in the third quarter of 2016 related to the Franklin County wind farm, which decreased the assets for “Non-Regulated, Parent and Other.”
IPL - Certain financial information relating to IPL’s business segments is as follows. Intersegment revenues were not material to IPL’s operations.
WPL - Certain financial information relating to WPL’s business segments is as follows. Intersegment revenues were not material to WPL’s operations.
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Segments Of Business | SEGMENTS OF BUSINESS Alliant Energy - Certain financial information relating to Alliant Energy’s business segments is as follows. Intersegment revenues were not material to Alliant Energy’s operations. Refer to Note 3 for discussion of asset valuation charges recorded in the third quarter of 2016 related to the Franklin County wind farm, which decreased the assets for “Non-Regulated, Parent and Other.”
IPL - Certain financial information relating to IPL’s business segments is as follows. Intersegment revenues were not material to IPL’s operations.
WPL - Certain financial information relating to WPL’s business segments is as follows. Intersegment revenues were not material to WPL’s operations.
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Related Parties |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Party Transactions [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Parties | RELATED PARTIES Service Agreements - IPL and WPL are parties to service agreements with an affiliate, Corporate Services. Pursuant to these service agreements, IPL and WPL receive various administrative and general services. These services are billed to IPL and WPL at cost based on expenses incurred by Corporate Services for the benefit of IPL and WPL, respectively. These costs consisted primarily of employee compensation and benefits, fees associated with various professional services, depreciation and amortization of property, plant and equipment, and a return on net assets. Corporate Services also acts as agent on behalf of IPL and WPL pursuant to the service agreements. As agent, Corporate Services enters into energy, capacity, ancillary services, and transmission sale and purchase transactions within MISO. Corporate Services assigns such sales and purchases among IPL and WPL based on statements received from MISO. The amounts billed for services provided, sales credited and purchases for the three and nine months ended September 30 were as follows (in millions):
Net intercompany payables to Corporate Services were as follows (in millions):
ATC - Pursuant to various agreements, WPL receives a range of transmission services from ATC. WPL provides operation, maintenance, and construction services to ATC. WPL and ATC also bill each other for use of shared facilities owned by each party. The related amounts billed between the parties for the three and nine months ended September 30 were as follows (in millions):
WPL owed ATC net amounts of $9 million as of September 30, 2016 and $8 million as of December 31, 2015. Franklin County Wind Farm - Refer to Note 3 for discussion of IPL’s anticipated filing with FERC in the fourth quarter of 2016 requesting approval to transfer the Franklin County wind farm assets from AEF to IPL in 2017. |
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Party Transactions [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Parties | RELATED PARTIES Service Agreements - IPL and WPL are parties to service agreements with an affiliate, Corporate Services. Pursuant to these service agreements, IPL and WPL receive various administrative and general services. These services are billed to IPL and WPL at cost based on expenses incurred by Corporate Services for the benefit of IPL and WPL, respectively. These costs consisted primarily of employee compensation and benefits, fees associated with various professional services, depreciation and amortization of property, plant and equipment, and a return on net assets. Corporate Services also acts as agent on behalf of IPL and WPL pursuant to the service agreements. As agent, Corporate Services enters into energy, capacity, ancillary services, and transmission sale and purchase transactions within MISO. Corporate Services assigns such sales and purchases among IPL and WPL based on statements received from MISO. The amounts billed for services provided, sales credited and purchases for the three and nine months ended September 30 were as follows (in millions):
Net intercompany payables to Corporate Services were as follows (in millions):
ATC - Pursuant to various agreements, WPL receives a range of transmission services from ATC. WPL provides operation, maintenance, and construction services to ATC. WPL and ATC also bill each other for use of shared facilities owned by each party. The related amounts billed between the parties for the three and nine months ended September 30 were as follows (in millions):
WPL owed ATC net amounts of $9 million as of September 30, 2016 and $8 million as of December 31, 2015. Franklin County Wind Farm - Refer to Note 3 for discussion of IPL’s anticipated filing with FERC in the fourth quarter of 2016 requesting approval to transfer the Franklin County wind farm assets from AEF to IPL in 2017. |
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Party Transactions [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Parties | RELATED PARTIES Service Agreements - IPL and WPL are parties to service agreements with an affiliate, Corporate Services. Pursuant to these service agreements, IPL and WPL receive various administrative and general services. These services are billed to IPL and WPL at cost based on expenses incurred by Corporate Services for the benefit of IPL and WPL, respectively. These costs consisted primarily of employee compensation and benefits, fees associated with various professional services, depreciation and amortization of property, plant and equipment, and a return on net assets. Corporate Services also acts as agent on behalf of IPL and WPL pursuant to the service agreements. As agent, Corporate Services enters into energy, capacity, ancillary services, and transmission sale and purchase transactions within MISO. Corporate Services assigns such sales and purchases among IPL and WPL based on statements received from MISO. The amounts billed for services provided, sales credited and purchases for the three and nine months ended September 30 were as follows (in millions):
Net intercompany payables to Corporate Services were as follows (in millions):
ATC - Pursuant to various agreements, WPL receives a range of transmission services from ATC. WPL provides operation, maintenance, and construction services to ATC. WPL and ATC also bill each other for use of shared facilities owned by each party. The related amounts billed between the parties for the three and nine months ended September 30 were as follows (in millions):
WPL owed ATC net amounts of $9 million as of September 30, 2016 and $8 million as of December 31, 2015. |
Discontinued Operations |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Discontinued Operations and Assets and Liabilities Held For Sale | DISCONTINUED OPERATIONS In 2013, Alliant Energy sold RMT to narrow its strategic focus and risk profile. The operating results of RMT have been separately classified and reported as discontinued operations in Alliant Energy’s income statements. A summary of the components of discontinued operations in Alliant Energy’s income statements for the three and nine months ended September 30 was as follows (in millions):
Refer to Note 13(d) for further discussion of warranty claims associated with RMT that have resulted in operating expenses subsequent to the sale. |
Summary Of Significant Accounting Policies (Policy) |
9 Months Ended |
---|---|
Sep. 30, 2016 | |
General, Basis of Accounting | The interim unaudited Financial Statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Accordingly, certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted, although management believes that the disclosures are adequate to make the information presented not misleading. These Financial Statements should be read in conjunction with the financial statements and the notes thereto included in the latest combined Annual Report on Form 10-K. |
General, Use of Estimates | In the opinion of management, all adjustments, which unless otherwise noted are normal and recurring in nature, necessary for a fair presentation of the results of operations, financial position and cash flows have been made. Results for the nine months ended September 30, 2016 are not necessarily indicative of results that may be expected for the year ending December 31, 2016. A change in management’s estimates or assumptions could have a material impact on financial condition and results of operations during the period in which such change occurred. |
General, Reclassification | Certain prior period amounts in the Financial Statements and Notes have been reclassified to conform to the current period presentation for comparative purposes. Unless otherwise noted, the Notes herein exclude discontinued operations for all periods presented. In the fourth quarter of 2015, IPL and WPL implemented a change in method of recording income taxes that impacts the separate financial statements of IPL and WPL. As discussed in Note 6, all Alliant Energy share and per share amounts have been adjusted to reflect a two-for-one common stock split distributed in May 2016. As required by GAAP, all prior period financial statements and disclosures presented herein have been restated to reflect the tax method change and common stock split. |
New Accounting Standards | New Accounting Standards - Revenue Recognition - In May 2014, the Financial Accounting Standards Board issued an accounting standard providing principles for recognizing revenue for the transfer of promised goods or services to customers with the consideration to which the entity expects to be entitled in exchange for those goods or services. This standard also requires disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Alliant Energy, IPL and WPL currently expect to adopt this standard on January 1, 2018 and are evaluating the impact of this standard on their financial condition and results of operations. Leases - In February 2016, the Financial Accounting Standards Board issued an accounting standard requiring lease assets and lease liabilities, including operating leases, to be recognized on the balance sheet for all leases with terms longer than 12 months. The standard also requires disclosure of key information about leasing arrangements. Alliant Energy, IPL and WPL are required to adopt this standard on January 1, 2019 and are currently evaluating the impact of this standard on their financial condition and results of operations. Early adoption of this standard is permitted. |
Depreciation | Property, Plant and Equipment - Utility Plant - Depreciation - In September 2016, the PSCW issued an order approving the implementation of updated depreciation rates for WPL effective January 1, 2017 as a result of a recently completed depreciation study. WPL estimates the new average rates of depreciation for its electric generation, electric distribution and gas properties will be approximately 3.2%, 2.6% and 2.3%, respectively, during 2017. |
IPL [Member] | |
General, Basis of Accounting | The interim unaudited Financial Statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Accordingly, certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted, although management believes that the disclosures are adequate to make the information presented not misleading. These Financial Statements should be read in conjunction with the financial statements and the notes thereto included in the latest combined Annual Report on Form 10-K. |
General, Use of Estimates | In the opinion of management, all adjustments, which unless otherwise noted are normal and recurring in nature, necessary for a fair presentation of the results of operations, financial position and cash flows have been made. Results for the nine months ended September 30, 2016 are not necessarily indicative of results that may be expected for the year ending December 31, 2016. A change in management’s estimates or assumptions could have a material impact on financial condition and results of operations during the period in which such change occurred. |
General, Reclassification | Certain prior period amounts in the Financial Statements and Notes have been reclassified to conform to the current period presentation for comparative purposes. Unless otherwise noted, the Notes herein exclude discontinued operations for all periods presented. In the fourth quarter of 2015, IPL and WPL implemented a change in method of recording income taxes that impacts the separate financial statements of IPL and WPL. As discussed in Note 6, all Alliant Energy share and per share amounts have been adjusted to reflect a two-for-one common stock split distributed in May 2016. As required by GAAP, all prior period financial statements and disclosures presented herein have been restated to reflect the tax method change and common stock split. |
New Accounting Standards | New Accounting Standards - Revenue Recognition - In May 2014, the Financial Accounting Standards Board issued an accounting standard providing principles for recognizing revenue for the transfer of promised goods or services to customers with the consideration to which the entity expects to be entitled in exchange for those goods or services. This standard also requires disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Alliant Energy, IPL and WPL currently expect to adopt this standard on January 1, 2018 and are evaluating the impact of this standard on their financial condition and results of operations. Leases - In February 2016, the Financial Accounting Standards Board issued an accounting standard requiring lease assets and lease liabilities, including operating leases, to be recognized on the balance sheet for all leases with terms longer than 12 months. The standard also requires disclosure of key information about leasing arrangements. Alliant Energy, IPL and WPL are required to adopt this standard on January 1, 2019 and are currently evaluating the impact of this standard on their financial condition and results of operations. Early adoption of this standard is permitted. |
WPL [Member] | |
General, Basis of Accounting | The interim unaudited Financial Statements included herein have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Accordingly, certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted, although management believes that the disclosures are adequate to make the information presented not misleading. These Financial Statements should be read in conjunction with the financial statements and the notes thereto included in the latest combined Annual Report on Form 10-K. |
General, Use of Estimates | In the opinion of management, all adjustments, which unless otherwise noted are normal and recurring in nature, necessary for a fair presentation of the results of operations, financial position and cash flows have been made. Results for the nine months ended September 30, 2016 are not necessarily indicative of results that may be expected for the year ending December 31, 2016. A change in management’s estimates or assumptions could have a material impact on financial condition and results of operations during the period in which such change occurred. |
General, Reclassification | Certain prior period amounts in the Financial Statements and Notes have been reclassified to conform to the current period presentation for comparative purposes. Unless otherwise noted, the Notes herein exclude discontinued operations for all periods presented. In the fourth quarter of 2015, IPL and WPL implemented a change in method of recording income taxes that impacts the separate financial statements of IPL and WPL. As discussed in Note 6, all Alliant Energy share and per share amounts have been adjusted to reflect a two-for-one common stock split distributed in May 2016. As required by GAAP, all prior period financial statements and disclosures presented herein have been restated to reflect the tax method change and common stock split. |
New Accounting Standards | New Accounting Standards - Revenue Recognition - In May 2014, the Financial Accounting Standards Board issued an accounting standard providing principles for recognizing revenue for the transfer of promised goods or services to customers with the consideration to which the entity expects to be entitled in exchange for those goods or services. This standard also requires disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Alliant Energy, IPL and WPL currently expect to adopt this standard on January 1, 2018 and are evaluating the impact of this standard on their financial condition and results of operations. Leases - In February 2016, the Financial Accounting Standards Board issued an accounting standard requiring lease assets and lease liabilities, including operating leases, to be recognized on the balance sheet for all leases with terms longer than 12 months. The standard also requires disclosure of key information about leasing arrangements. Alliant Energy, IPL and WPL are required to adopt this standard on January 1, 2019 and are currently evaluating the impact of this standard on their financial condition and results of operations. Early adoption of this standard is permitted. |
Depreciation | Property, Plant and Equipment - Utility Plant - Depreciation - In September 2016, the PSCW issued an order approving the implementation of updated depreciation rates for WPL effective January 1, 2017 as a result of a recently completed depreciation study. WPL estimates the new average rates of depreciation for its electric generation, electric distribution and gas properties will be approximately 3.2%, 2.6% and 2.3%, respectively, during 2017. |
Regulatory Matters (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Regulatory Assets [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Regulatory Assets | Regulatory assets were comprised of the following items (in millions):
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Regulatory Liabilities | Regulatory liabilities were comprised of the following items (in millions):
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Tax Benefit Riders | For the nine months ended September 30, 2016, Alliant Energy’s and IPL’s “IPL’s tax benefit riders” regulatory liabilities decreased by $56 million as follows (in millions):
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Customer Billing Credits | For the three and nine months ended September 30, IPL recorded billing credits to reduce retail electric customers’ bills as follows (in millions):
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Regulatory Assets [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Regulatory Assets | Regulatory assets were comprised of the following items (in millions):
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Regulatory Liabilities | Regulatory liabilities were comprised of the following items (in millions):
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Tax Benefit Riders | For the nine months ended September 30, 2016, Alliant Energy’s and IPL’s “IPL’s tax benefit riders” regulatory liabilities decreased by $56 million as follows (in millions):
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Customer Billing Credits | For the three and nine months ended September 30, IPL recorded billing credits to reduce retail electric customers’ bills as follows (in millions):
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Regulatory Assets [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Regulatory Assets | Regulatory assets were comprised of the following items (in millions):
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Regulatory Liabilities | Regulatory liabilities were comprised of the following items (in millions):
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Receivables (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Receivables [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Maximum And Average Outstanding Cash Proceeds | IPL’s maximum and average outstanding cash proceeds related to the sales of accounts receivable program for the three and nine months ended September 30 were as follows (in millions):
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Receivables Sold Under The Receivables Agreement | The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):
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Additional Attributes Of Receivables Sold Under The Receivables Agreement | Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three and nine months ended September 30 were as follows (in millions):
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Receivables [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Maximum And Average Outstanding Cash Proceeds | IPL’s maximum and average outstanding cash proceeds related to the sales of accounts receivable program for the three and nine months ended September 30 were as follows (in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Receivables Sold Under The Receivables Agreement | The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Additional Attributes Of Receivables Sold Under The Receivables Agreement | Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three and nine months ended September 30 were as follows (in millions):
|
Investments (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Investments [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Unconsolidated Equity Investments | Equity (income) loss from unconsolidated investments accounted for under the equity method of accounting for the three and nine months ended September 30 was as follows (in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Investments [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Unconsolidated Equity Investments | Equity (income) loss from unconsolidated investments accounted for under the equity method of accounting for the three and nine months ended September 30 was as follows (in millions):
|
Common Equity (Tables) |
9 Months Ended | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2016 | |||||||||||||||||||
Stockholders' Equity Note [Abstract] | |||||||||||||||||||
Common Share Activity | A summary of Alliant Energy’s common stock activity was as follows:
|
Debt (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Debt Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Other Short-Term Borrowings | Information regarding commercial paper classified as short-term debt was as follows (dollars in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Debt Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Other Short-Term Borrowings | Information regarding commercial paper classified as short-term debt was as follows (dollars in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Debt Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Other Short-Term Borrowings | Information regarding commercial paper classified as short-term debt was as follows (dollars in millions):
|
Income Taxes (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Income Taxes [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Effective Income Tax Rates | The overall income tax rates shown in the following table were computed by dividing income tax expense (benefit) by income from continuing operations before income taxes.
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Summary Of Tax Credit Carryforwards | At September 30, 2016, tax carryforwards and associated deferred tax assets and expiration dates were estimated as follows (dollars in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Income Taxes [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Effective Income Tax Rates | The overall income tax rates shown in the following table were computed by dividing income tax expense (benefit) by income from continuing operations before income taxes.
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Summary Of Tax Credit Carryforwards | At September 30, 2016, tax carryforwards and associated deferred tax assets and expiration dates were estimated as follows (dollars in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Income Taxes [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Effective Income Tax Rates | The overall income tax rates shown in the following table were computed by dividing income tax expense (benefit) by income from continuing operations before income taxes.
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Summary Of Tax Credit Carryforwards | At September 30, 2016, tax carryforwards and associated deferred tax assets and expiration dates were estimated as follows (dollars in millions):
|
Benefit Plans (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Pension And Other Postretirement Benefits Plans | The components of net periodic benefit costs (credits) for sponsored defined benefit pension and OPEB plans for the three and nine months ended September 30 are included in the tables below (in millions). In IPL’s and WPL’s tables below, the defined benefit pension plans costs represent those respective costs for their bargaining unit employees covered under the qualified plans that they sponsor, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Alliant Energy and Corporate Services sponsored qualified and non-qualified defined benefit pension plans. In IPL’s and WPL’s tables below, the OPEB plans costs (credits) represent respective costs (credits) for their employees, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Corporate Services sponsored OPEB plan.
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Employees Participate In Defined Contribution Retirement Plans | For the three and nine months ended September 30, costs related to the 401(k) savings plan, which are partially based on the participants’ contributions and include allocated costs associated with Corporate Services employees for IPL and WPL, were as follows (in millions):
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Recognized Compensation Expense And Income Tax Benefits | A summary of compensation expense, including amounts allocated to IPL and WPL, and the related income tax benefits recognized for share-based compensation awards for the three and nine months ended September 30 was as follows (in millions):
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Performance Shares and Units [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Equity-based Compensation Plans Activity | A summary of the performance shares and performance units activity, with amounts representing the target number of awards, was as follows:
Granted Awards - For performance units granted in 2016, the final value is based on the closing market price of one share of Alliant Energy’s common stock at the end of the performance period. Compensation expense for performance shares and performance units is recorded ratably over the performance period based on the fair value of the awards at each reporting period. Vested Awards - During the nine months ended September 30, certain performance shares and performance units vested, resulting in payouts (a combination of cash and common stock for the performance shares and cash only for the performance units) as follows:
Fair Value of Awards - Information related to fair values of nonvested performance shares and performance units at September 30, 2016, by year of grant, was as follows:
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Performance Contingent Restricted Stock [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Equity-based Compensation Plans Activity | A summary of the performance contingent restricted stock activity was as follows:
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Performance Restricted Stock Unit [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Equity-based Compensation Plans Activity | A summary of the performance restricted stock units activity, with amounts representing the target number of units, was as follows:
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Performance Restricted Unit [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Equity-based Compensation Plans Activity | A summary of the performance restricted units activity, with amounts representing the target number of units, was as follows:
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Key Employee Performance Restricted Unit [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Equity-based Compensation Plans Activity | A summary of the key employee performance restricted units activity, with amounts representing the target number of units, was as follows:
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Restricted Stock Unit And Restricted Unit [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Equity-based Compensation Plans Activity | A summary of the restricted stock units and restricted units activity was as follows:
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Performance Contingent Cash Awards [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Equity-based Compensation Plans Activity | A summary of the performance-contingent cash awards activity was as follows:
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||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Pension And Other Postretirement Benefits Plans | The components of net periodic benefit costs (credits) for sponsored defined benefit pension and OPEB plans for the three and nine months ended September 30 are included in the tables below (in millions). In IPL’s and WPL’s tables below, the defined benefit pension plans costs represent those respective costs for their bargaining unit employees covered under the qualified plans that they sponsor, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Alliant Energy and Corporate Services sponsored qualified and non-qualified defined benefit pension plans. In IPL’s and WPL’s tables below, the OPEB plans costs (credits) represent respective costs (credits) for their employees, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Corporate Services sponsored OPEB plan.
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||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Employees Participate In Defined Contribution Retirement Plans | For the three and nine months ended September 30, costs related to the 401(k) savings plan, which are partially based on the participants’ contributions and include allocated costs associated with Corporate Services employees for IPL and WPL, were as follows (in millions):
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||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Recognized Compensation Expense And Income Tax Benefits | A summary of compensation expense, including amounts allocated to IPL and WPL, and the related income tax benefits recognized for share-based compensation awards for the three and nine months ended September 30 was as follows (in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Plan Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined Benefit Pension And Other Postretirement Benefits Plans | The components of net periodic benefit costs (credits) for sponsored defined benefit pension and OPEB plans for the three and nine months ended September 30 are included in the tables below (in millions). In IPL’s and WPL’s tables below, the defined benefit pension plans costs represent those respective costs for their bargaining unit employees covered under the qualified plans that they sponsor, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Alliant Energy and Corporate Services sponsored qualified and non-qualified defined benefit pension plans. In IPL’s and WPL’s tables below, the OPEB plans costs (credits) represent respective costs (credits) for their employees, as well as amounts directly assigned to them related to their current and former non-bargaining employees who are participants in the Corporate Services sponsored OPEB plan.
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||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Employees Participate In Defined Contribution Retirement Plans | For the three and nine months ended September 30, costs related to the 401(k) savings plan, which are partially based on the participants’ contributions and include allocated costs associated with Corporate Services employees for IPL and WPL, were as follows (in millions):
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Recognized Compensation Expense And Income Tax Benefits | A summary of compensation expense, including amounts allocated to IPL and WPL, and the related income tax benefits recognized for share-based compensation awards for the three and nine months ended September 30 was as follows (in millions):
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Asset Retirement Obligations (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Asset Retirement Obligations [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reconciliation Of Changes In Asset Retirement Obligations | A reconciliation of the changes in AROs associated with long-lived assets is as follows (in millions):
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Asset Retirement Obligations [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reconciliation Of Changes In Asset Retirement Obligations | A reconciliation of the changes in AROs associated with long-lived assets is as follows (in millions):
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Asset Retirement Obligations [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reconciliation Of Changes In Asset Retirement Obligations | A reconciliation of the changes in AROs associated with long-lived assets is as follows (in millions):
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Fair Value Measurements (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Statement [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Fair Value Measurements | Carrying amounts and related estimated fair values of other financial instruments were as follows (in millions):
|
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Fair Value Measurements Using Significant Unobservable Inputs | Information for fair value measurements using significant unobservable inputs (Level 3 inputs) was as follows (in millions):
|
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Fair Value Of Net Derivative Assets (Liabilities) | The fair value of electric, natural gas and coal commodity contracts categorized as Level 3 was recognized as net derivative assets (liabilities) as follows (in millions):
|
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Statement [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Fair Value Measurements | Carrying amounts and related estimated fair values of other financial instruments were as follows (in millions):
|
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Fair Value Measurements Using Significant Unobservable Inputs | Information for fair value measurements using significant unobservable inputs (Level 3 inputs) was as follows (in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Fair Value Of Net Derivative Assets (Liabilities) | The fair value of electric, natural gas and coal commodity contracts categorized as Level 3 was recognized as net derivative assets (liabilities) as follows (in millions):
|
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Statement [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Fair Value Measurements | Carrying amounts and related estimated fair values of other financial instruments were as follows (in millions):
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Fair Value Measurements Using Significant Unobservable Inputs | Information for fair value measurements using significant unobservable inputs (Level 3 inputs) was as follows (in millions):
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Fair Value Of Net Derivative Assets (Liabilities) | The fair value of electric, natural gas and coal commodity contracts categorized as Level 3 was recognized as net derivative assets (liabilities) as follows (in millions):
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Derivative Instruments (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Derivative Instruments [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notional Amounts Of Derivative Instruments | As of September 30, 2016, gross notional amounts and settlement/delivery years related to outstanding swap contracts, option contracts, physical forward contracts, FTRs, coal contracts and diesel fuel contracts that were accounted for as commodity derivative instruments were as follows (units in thousands):
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Fair Value Of Financial Instruments | The fair values of current derivative assets are included in “Other current assets,” non-current derivative assets are included in “Deferred charges and other,” current derivative liabilities are included in “Other current liabilities” and non-current derivative liabilities are included in “Other liabilities” on the balance sheets as follows (in millions):
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Derivative Instruments [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notional Amounts Of Derivative Instruments | As of September 30, 2016, gross notional amounts and settlement/delivery years related to outstanding swap contracts, option contracts, physical forward contracts, FTRs, coal contracts and diesel fuel contracts that were accounted for as commodity derivative instruments were as follows (units in thousands):
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Fair Value Of Financial Instruments | The fair values of current derivative assets are included in “Other current assets,” non-current derivative assets are included in “Deferred charges and other,” current derivative liabilities are included in “Other current liabilities” and non-current derivative liabilities are included in “Other liabilities” on the balance sheets as follows (in millions):
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Derivative Instruments [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notional Amounts Of Derivative Instruments | As of September 30, 2016, gross notional amounts and settlement/delivery years related to outstanding swap contracts, option contracts, physical forward contracts, FTRs, coal contracts and diesel fuel contracts that were accounted for as commodity derivative instruments were as follows (units in thousands):
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Fair Value Of Financial Instruments | The fair values of current derivative assets are included in “Other current assets,” non-current derivative assets are included in “Deferred charges and other,” current derivative liabilities are included in “Other current liabilities” and non-current derivative liabilities are included in “Other liabilities” on the balance sheets as follows (in millions):
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Commitments And Contingencies (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Commitments and Contingencies [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Operating Expense Purchase Obligations | At September 30, 2016, minimum future commitments related to these operating expense purchase obligations were as follows (in millions):
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MGP Site Estimated Future Costs And Recorded Liabilities | At September 30, 2016, estimated future costs expected to be incurred for the investigation, remediation and monitoring of the MGP sites, as well as environmental liabilities recorded on the balance sheets for these sites, were as follows (in millions):
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IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Commitments and Contingencies [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Operating Expense Purchase Obligations | At September 30, 2016, minimum future commitments related to these operating expense purchase obligations were as follows (in millions):
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MGP Site Estimated Future Costs And Recorded Liabilities | At September 30, 2016, estimated future costs expected to be incurred for the investigation, remediation and monitoring of the MGP sites, as well as environmental liabilities recorded on the balance sheets for these sites, were as follows (in millions):
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WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Commitments and Contingencies [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Operating Expense Purchase Obligations | At September 30, 2016, minimum future commitments related to these operating expense purchase obligations were as follows (in millions):
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MGP Site Estimated Future Costs And Recorded Liabilities | At September 30, 2016, estimated future costs expected to be incurred for the investigation, remediation and monitoring of the MGP sites, as well as environmental liabilities recorded on the balance sheets for these sites, were as follows (in millions):
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Segments Of Business (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Segments Of Business | Certain financial information relating to Alliant Energy’s business segments is as follows. Intersegment revenues were not material to Alliant Energy’s operations. Refer to Note 3 for discussion of asset valuation charges recorded in the third quarter of 2016 related to the Franklin County wind farm, which decreased the assets for “Non-Regulated, Parent and Other.”
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||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Segments Of Business | Certain financial information relating to IPL’s business segments is as follows. Intersegment revenues were not material to IPL’s operations.
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Segments Of Business | Certain financial information relating to WPL’s business segments is as follows. Intersegment revenues were not material to WPL’s operations.
|
Related Parties (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Party Transactions [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Services Provided, Sales Credited And Purchases | The amounts billed for services provided, sales credited and purchases for the three and nine months ended September 30 were as follows (in millions):
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Net Intercompany Payables | Net intercompany payables to Corporate Services were as follows (in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Amounts Billed Between Parties | The related amounts billed between the parties for the three and nine months ended September 30 were as follows (in millions):
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||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
IPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Party Transactions [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Services Provided, Sales Credited And Purchases | The amounts billed for services provided, sales credited and purchases for the three and nine months ended September 30 were as follows (in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Net Intercompany Payables | Net intercompany payables to Corporate Services were as follows (in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
WPL [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Party Transactions [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Services Provided, Sales Credited And Purchases | The amounts billed for services provided, sales credited and purchases for the three and nine months ended September 30 were as follows (in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Net Intercompany Payables | Net intercompany payables to Corporate Services were as follows (in millions):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Related Amounts Billed Between Parties | The related amounts billed between the parties for the three and nine months ended September 30 were as follows (in millions):
|
Discontinued Operations (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Discontinued Operations in Income Statement | A summary of the components of discontinued operations in Alliant Energy’s income statements for the three and nine months ended September 30 was as follows (in millions):
|
Summary Of Significant Accounting Policies (Narrative) (Details) |
12 Months Ended | |
---|---|---|
Apr. 20, 2016 |
Dec. 31, 2017 |
|
Summary of Significant Accounting Policies [Line Items] | ||
Common stock split conversion ratio (2:1) | 2 | |
Scenario, Forecast [Member] | Electric Generation [Member] | WPL [Member] | ||
Summary of Significant Accounting Policies [Line Items] | ||
Average rate of depreciation | 3.20% | |
Scenario, Forecast [Member] | Electric Distribution [Member] | WPL [Member] | ||
Summary of Significant Accounting Policies [Line Items] | ||
Average rate of depreciation | 2.60% | |
Scenario, Forecast [Member] | Gas Transmission [Member] | WPL [Member] | ||
Summary of Significant Accounting Policies [Line Items] | ||
Average rate of depreciation | 2.30% |
Regulatory Matters (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended | |
---|---|---|---|---|
Dec. 31, 2016 |
Sep. 30, 2016 |
Dec. 31, 2017 |
Dec. 31, 2015 |
|
2016 Test Year Retail Electric Fuel-Related [Member] | WPL [Member] | ||||
Regulatory Matters [Line Items] | ||||
Annual bandwidth for fuel-related costs | 2.00% | |||
2016 Test Year Retail Electric Fuel-Related [Member] | Alliant Energy and WPL [Member] | ||||
Regulatory Matters [Line Items] | ||||
Retail electric fuel-related costs | $ 9 | |||
2015 Test Year Retail Electric Fuel Related [Member] | WPL [Member] | ||||
Regulatory Matters [Line Items] | ||||
Annual bandwidth for fuel-related costs | 2.00% | |||
Scenario, Forecast [Member] | 2017/2018 Test Period Retail Electric [Member] | WPL [Member] | ||||
Regulatory Matters [Line Items] | ||||
Requested rate increase (decrease), amount | $ 13 | |||
Requested rate increase (decrease), percentage | 1.00% | |||
Scenario, Forecast [Member] | 2017 Test Period Retail Electric Base Rate [Member] | WPL [Member] | ||||
Regulatory Matters [Line Items] | ||||
Requested rate increase (decrease), amount | $ 65 | |||
Scenario, Forecast [Member] | 2017 Test Year Retail Electric Fuel Related [Member] | WPL [Member] | ||||
Regulatory Matters [Line Items] | ||||
Requested rate increase (decrease), amount | (52) | |||
Scenario, Forecast [Member] | 2017/2018 Test Period Retail Gas [Member] | WPL [Member] | ||||
Regulatory Matters [Line Items] | ||||
Requested rate increase (decrease), amount | $ 9 | |||
Requested rate increase (decrease), percentage | 13.00% | |||
Scenario, Forecast [Member] | 2015 Test Year Retail Electric Fuel Related [Member] | WPL [Member] | ||||
Regulatory Matters [Line Items] | ||||
Authorized refund to customers, including interest | $ 10 |
Regulatory Matters (Regulatory Assets) (Details) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
---|---|---|
Regulatory Assets [Line Items] | ||
Regulatory assets | $ 1,874.8 | $ 1,908.6 |
Tax-related [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 1,033.5 | 987.7 |
Pension and OPEB costs [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 551.0 | 579.5 |
AROs [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 103.9 | 92.4 |
WPL's EGUs retired early [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 43.1 | 45.0 |
Derivatives [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 39.0 | 70.6 |
Emission allowances [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 26.3 | 26.9 |
Commodity cost recovery [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 10.1 | 35.9 |
Other [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 67.9 | 70.6 |
IPL [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 1,417.2 | 1,402.6 |
IPL [Member] | Tax-related [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 1,000.7 | 958.2 |
IPL [Member] | Pension and OPEB costs [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 284.7 | 298.1 |
IPL [Member] | AROs [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 61.5 | 50.8 |
IPL [Member] | Derivatives [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 10.6 | 28.2 |
IPL [Member] | Emission allowances [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 26.3 | 26.9 |
IPL [Member] | Commodity cost recovery [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 0.4 | 2.8 |
IPL [Member] | Other [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 33.0 | 37.6 |
WPL [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 457.6 | 506.0 |
WPL [Member] | Tax-related [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 32.8 | 29.5 |
WPL [Member] | Pension and OPEB costs [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 266.3 | 281.4 |
WPL [Member] | AROs [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 42.4 | 41.6 |
WPL [Member] | WPL's EGUs retired early [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 43.1 | 45.0 |
WPL [Member] | Derivatives [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 28.4 | 42.4 |
WPL [Member] | Commodity cost recovery [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | 9.7 | 33.1 |
WPL [Member] | Other [Member] | ||
Regulatory Assets [Line Items] | ||
Regulatory assets | $ 34.9 | $ 33.0 |
Regulatory Matters (Regulatory Liabilities) (Details) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
---|---|---|
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | $ 675.8 | $ 737.7 |
Cost of removal obligations [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 410.6 | 406.0 |
IPL's tax benefit riders [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 103.1 | 159.2 |
Electric transmission cost recovery [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 54.5 | 43.5 |
Commodity cost recovery [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 39.1 | 37.6 |
Energy efficiency cost recovery [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 28.0 | 48.3 |
Other [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 40.5 | 43.1 |
IPL [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 431.4 | 489.2 |
IPL [Member] | Cost of removal obligations [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 267.2 | 260.4 |
IPL [Member] | IPL's tax benefit riders [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 103.1 | 159.2 |
IPL [Member] | Electric transmission cost recovery [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 25.0 | 21.9 |
IPL [Member] | Commodity cost recovery [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 15.1 | 23.5 |
IPL [Member] | Energy efficiency cost recovery [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 0.0 | 0.0 |
IPL [Member] | Other [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 21.0 | 24.2 |
WPL [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 244.4 | 248.5 |
WPL [Member] | Cost of removal obligations [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 143.4 | 145.6 |
WPL [Member] | Electric transmission cost recovery [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 29.5 | 21.6 |
WPL [Member] | Commodity cost recovery [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 24.0 | 14.1 |
WPL [Member] | Energy efficiency cost recovery [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | 28.0 | 48.3 |
WPL [Member] | Other [Member] | ||
Regulatory Liabilities [Line Items] | ||
Regulatory liabilities | $ 19.5 | $ 18.9 |
Regulatory Matters (Tax Benefit Riders) (Details) - USD ($) $ in Millions |
9 Months Ended | |
---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Regulatory Liabilities [Line Items] | ||
Increase (decrease) in regulatory liabilities | $ (66.5) | $ (61.5) |
Alliant Energy and IPL [Member] | Electric tax benefit rider [Member] | ||
Regulatory Liabilities [Line Items] | ||
Increase (decrease) in regulatory liabilities | (47.0) | |
Alliant Energy and IPL [Member] | Gas tax benefit rider [Member] | ||
Regulatory Liabilities [Line Items] | ||
Increase (decrease) in regulatory liabilities | (9.0) | |
Alliant Energy and IPL [Member] | Tax benefit riders [Member] | ||
Regulatory Liabilities [Line Items] | ||
Increase (decrease) in regulatory liabilities | $ (56.0) |
Regulatory Matters (Customer Billing Credits) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
IPL [Member] | ||||
Regulatory Liabilities [Line Items] | ||||
Billings credits to reduce retail electric customers' bills | $ 3 | $ 7 | $ 7 | $ 19 |
Property, Plant and Equipment (Narrative) (Details) $ / shares in Units, $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
---|---|---|---|---|---|
Sep. 30, 2016
USD ($)
$ / shares
|
Sep. 30, 2015
USD ($)
|
Sep. 30, 2016
USD ($)
$ / shares
MW
|
Sep. 30, 2015
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
Property, Plant and Equipment [Line Items] | |||||
Allowance for funds used during construction | $ (15.8) | $ (9.7) | $ (44.3) | $ (25.1) | |
Current value of Franklin County wind farm assets | 33.0 | 33.0 | |||
Asset valuation charges for Franklin County wind farm, pre-tax | 86.4 | 0.0 | 86.4 | 0.0 | |
Asset valuation charges for Franklin County wind farm, after tax | $ 51.0 | $ 51.0 | |||
Asset valuation charges for Franklin County wind farm, after tax (in dollars per share) | $ / shares | $ 0.23 | $ 0.23 | |||
IPL [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Allowance for funds used during construction | $ (13.8) | $ (7.3) | $ (36.2) | (19.3) | |
Edgewater Unit 5 [Member] | Alliant Energy and WPL [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Plant in service | 223.0 | 223.0 | |||
Allowance for funds used during construction | (12.0) | ||||
Marshalltown [Member] | Alliant Energy and IPL [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Allowance for funds used during construction | (56.0) | ||||
Construction work in progress | $ 600.0 | $ 600.0 | |||
Marshalltown [Member] | IPL [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Fossil-fueled EGU capacity (in megawatts) | MW | 650 | ||||
Gas Distribution Equipment [Member] | Alliant Energy and IPL [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Loss on sale of Minnesota distribution assets | 3.0 | ||||
Gas Distribution Equipment [Member] | IPL [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Proceeds from sale of property, plant, and equipment | $ 11.0 | ||||
Receipt of promissory note | 2.0 | ||||
Electric Distribution [Member] | Alliant Energy and IPL [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Loss on sale of Minnesota distribution assets | $ 9.0 | ||||
Electric Distribution [Member] | IPL [Member] | |||||
Property, Plant and Equipment [Line Items] | |||||
Proceeds from sale of property, plant, and equipment | $ 129.0 |
Receivables (Narrative) (Details) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
||
---|---|---|---|---|
Receivables [Line Items] | ||||
Deferred proceeds | $ 239.7 | $ 172.0 | ||
IPL [Member] | ||||
Receivables [Line Items] | ||||
Deferred proceeds | 239.7 | 172.0 | ||
Receivables Sold [Member] | IPL [Member] | ||||
Receivables [Line Items] | ||||
Receivables sold to third party | 252.9 | 181.1 | ||
Cash proceeds of receivables sold | [1] | 1.0 | 5.0 | |
Deferred proceeds | 239.7 | $ 172.0 | ||
Outstanding receivables past due | $ 64.5 | |||
|
Receivables (Maximum And Average Outstanding Cash Proceeds) (Details) - IPL [Member] - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Receivables [Line Items] | ||||
Outstanding aggregate cash proceeds (based on daily outstanding balances) | $ 112.3 | $ 41.2 | $ 91.5 | $ 62.1 |
Maximum [Member] | ||||
Receivables [Line Items] | ||||
Outstanding aggregate cash proceeds (based on daily outstanding balances) | $ 172.0 | $ 137.0 | $ 172.0 | $ 137.0 |
Receivables (Receivables Sold Under The Agreement) (Details) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
||
---|---|---|---|---|
Receivables [Line Items] | ||||
Fair value of deferred proceeds | $ 239.7 | $ 172.0 | ||
IPL [Member] | ||||
Receivables [Line Items] | ||||
Fair value of deferred proceeds | 239.7 | 172.0 | ||
Receivables Sold [Member] | IPL [Member] | ||||
Receivables [Line Items] | ||||
Customer accounts receivable | 172.9 | 109.7 | ||
Unbilled utility revenues | 79.8 | 71.3 | ||
Other receivables | 0.2 | 0.1 | ||
Receivables sold to third party | 252.9 | 181.1 | ||
Less: cash proceeds | [1] | 1.0 | 5.0 | |
Deferred proceeds | 251.9 | 176.1 | ||
Less: allowance for doubtful accounts | 12.2 | 4.1 | ||
Fair value of deferred proceeds | $ 239.7 | $ 172.0 | ||
|
Receivables (Additional Attributes Of Receivables Sold Under The Agreement) (Details) - IPL [Member] - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Receivables [Line Items] | ||||
Collections reinvested in receivables | $ 499.7 | $ 480.1 | $ 1,362.1 | $ 1,403.1 |
Write-offs (recoveries), net | $ (0.3) | $ 3.3 | $ (0.6) | $ 6.8 |
Investments (Narrative) (Details) - USD ($) $ in Millions |
9 Months Ended | 35 Months Ended |
---|---|---|
Sep. 30, 2016 |
Sep. 30, 2016 |
|
Schedule of Investments [Line Items] | ||
Proceeds from liquidation of company-owned life insurance policies | $ 31 | |
IPL [Member] | ||
Schedule of Investments [Line Items] | ||
Proceeds from liquidation of company-owned life insurance policies | 19 | |
ATC [Member] | Alliant Energy and WPL [Member] | ||
Schedule of Investments [Line Items] | ||
Reduction in equity income from ATC | $ 9 | $ 24 |
Investments (Unconsolidated Equity Investments) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Schedule of Investments [Line Items] | ||||
Equity (income) loss from unconsolidated investments, net | $ (9.2) | $ (11.1) | $ (28.8) | $ (28.9) |
WPL [Member] | ||||
Schedule of Investments [Line Items] | ||||
Equity (income) loss from unconsolidated investments, net | (9.3) | (11.1) | (29.0) | (30.2) |
ATC [Member] | ||||
Schedule of Investments [Line Items] | ||||
Equity (income) loss from unconsolidated investments, net | (9.1) | (10.9) | (28.6) | (29.6) |
ATC [Member] | WPL [Member] | ||||
Schedule of Investments [Line Items] | ||||
Equity (income) loss from unconsolidated investments, net | (9.1) | (10.9) | (28.6) | (29.6) |
Other [Member] | ||||
Schedule of Investments [Line Items] | ||||
Equity (income) loss from unconsolidated investments, net | (0.1) | (0.2) | (0.2) | 0.7 |
Other [Member] | WPL [Member] | ||||
Schedule of Investments [Line Items] | ||||
Equity (income) loss from unconsolidated investments, net | $ (0.2) | $ (0.2) | $ (0.4) | $ (0.6) |
Common Equity (Narrative) (Details) $ in Millions |
3 Months Ended | 9 Months Ended | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Apr. 20, 2016
shares
|
Sep. 30, 2016
USD ($)
shares
|
Sep. 30, 2015
USD ($)
|
Sep. 30, 2016
USD ($)
shares
|
Sep. 30, 2015
USD ($)
shares
|
Dec. 31, 2015
shares
|
||||||
Common Equity [Line Items] | |||||||||||
Proceeds from issuance of common stock, net | $ 20.4 | $ 145.4 | |||||||||
Common stock split conversion ratio (2:1) | 2 | ||||||||||
Common stock, shares authorized (in shares) | shares | 240,000,000 | 480,000,000 | [1] | 480,000,000 | [1] | 480,000,000 | [1] | ||||
Other comprehensive income | $ 0.0 | $ 0.0 | $ 0.0 | 0.0 | |||||||
IPL [Member] | |||||||||||
Common Equity [Line Items] | |||||||||||
Common stock, shares authorized (in shares) | shares | 24,000,000 | 24,000,000 | 24,000,000 | ||||||||
Retained earnings free of dividend restrictions | $ 632.0 | $ 632.0 | |||||||||
Restricted net assets of subsidiaries | 1,500.0 | 1,500.0 | |||||||||
Capital contributions from parent | 65.0 | 100.0 | |||||||||
Common stock dividends to parent | 114.0 | ||||||||||
Other comprehensive income | $ 0.0 | 0.0 | $ 0.0 | 0.0 | |||||||
WPL [Member] | |||||||||||
Common Equity [Line Items] | |||||||||||
Common stock, shares authorized (in shares) | shares | 18,000,000 | 18,000,000 | 18,000,000 | ||||||||
Retained earnings free of dividend restrictions | $ 34.0 | $ 34.0 | |||||||||
Restricted net assets of subsidiaries | 1,800.0 | 1,800.0 | |||||||||
Common stock dividends to parent | 101.2 | ||||||||||
Other comprehensive income | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 | |||||||
At-the-market Offering Program [Member] | |||||||||||
Common Equity [Line Items] | |||||||||||
Common stock issued during the period, At-the-market offering program (in shares) | shares | 4,373,234 | ||||||||||
Proceeds from issuance of common stock, net | $ 133.0 | ||||||||||
Fees and commissions from issuance of common stock | $ 2.0 | ||||||||||
|
Common Equity (Common Share Activity) (Details) |
9 Months Ended | |||
---|---|---|---|---|
Sep. 30, 2016
shares
| ||||
Common Stock Oustanding [Roll Forward] | ||||
Shares outstanding, January 1, 2016 (in shares) | 226,918,432 | [1] | ||
Shareowner Direct Plan issuances (in shares) | 559,588 | |||
Equity-based compensation plans (in shares) | 22,408 | |||
Shares outstanding, September 30, 2016 (in shares) | 227,500,428 | [1] | ||
|
Debt (Narrative) (Details) - USD ($) $ in Millions |
1 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Oct. 31, 2016 |
Sep. 30, 2016 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Debt [Line Items] | ||||
Long-term debt issued | $ 300.0 | $ 250.7 | ||
IPL [Member] | ||||
Debt [Line Items] | ||||
Long-term debt issued | 300.0 | $ 250.0 | ||
Repayments of commercial paper | $ 100.0 | |||
Senior Debentures [Member] | 3.7% senior debenture, due 2046 [Member] | IPL [Member] | ||||
Debt [Line Items] | ||||
Long-term debt issued | $ 300.0 | |||
Interest rate | 3.70% | 3.70% | ||
Subsequent Event [Member] | Term Loan Credit Agreement [Member] | Term Loan Credit Agreement Through 2018, 1% at September 30, 2016 [Member] | Alliant Energy Finance LLC [Member] | ||||
Debt [Line Items] | ||||
Long-term debt issued | $ 500.0 | |||
Interest rate | 1.30% |
Debt (Credit Facilities) (Details) - USD ($) $ in Millions |
9 Months Ended | |
---|---|---|
Sep. 30, 2016 |
Dec. 31, 2015 |
|
Commercial paper: | ||
Amount outstanding | $ 238.3 | $ 159.8 |
Weighted average remaining maturity (in days) | 4 days | |
Weighted average interest rates | 0.60% | |
Available credit facility capacity | $ 761.7 | |
Parent Company [Member] | ||
Commercial paper: | ||
Amount outstanding | $ 226.5 | |
Weighted average remaining maturity (in days) | 4 days | |
Weighted average interest rates | 0.70% | |
Available credit facility capacity | $ 73.5 | |
IPL [Member] | ||
Commercial paper: | ||
Amount outstanding | 0.0 | |
Available credit facility capacity | 300.0 | |
WPL [Member] | ||
Commercial paper: | ||
Amount outstanding | $ 11.8 | $ 19.9 |
Weighted average remaining maturity (in days) | 3 days | |
Weighted average interest rates | 0.40% | |
Available credit facility capacity | $ 388.2 |
Debt (Other Short-Term Borrowings) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Debt [Line Items] | ||||
Maximum amount outstanding (based on daily outstanding balances) | $ 248.0 | $ 181.2 | $ 248.0 | $ 181.2 |
Average amount outstanding (based on daily outstanding balances) | $ 220.1 | $ 122.4 | $ 210.7 | $ 114.5 |
Weighted average interest rates | 0.60% | 0.40% | 0.60% | 0.40% |
IPL [Member] | ||||
Debt [Line Items] | ||||
Maximum amount outstanding (based on daily outstanding balances) | $ 3.1 | $ 18.4 | $ 3.1 | $ 18.4 |
Average amount outstanding (based on daily outstanding balances) | $ 0.1 | $ 0.5 | $ 0.0 | $ 0.2 |
Weighted average interest rates | 0.60% | 0.40% | 0.60% | 0.40% |
WPL [Member] | ||||
Debt [Line Items] | ||||
Maximum amount outstanding (based on daily outstanding balances) | $ 55.4 | $ 0.0 | $ 62.9 | $ 0.0 |
Average amount outstanding (based on daily outstanding balances) | $ 36.4 | $ 0.0 | $ 33.2 | $ 0.0 |
Weighted average interest rates | 0.40% | 0.40% |
Income Taxes (Narrative) (Details) $ in Millions |
9 Months Ended |
---|---|
Sep. 30, 2016
USD ($)
| |
Income Taxes [Line Items] | |
Increase (decrease) in deferred tax liabilities | $ 149.4 |
IPL [Member] | |
Income Taxes [Line Items] | |
Increase (decrease) in deferred tax liabilities | 115.6 |
WPL [Member] | |
Income Taxes [Line Items] | |
Increase (decrease) in deferred tax liabilities | $ 103.4 |
Income Taxes (Schedule Of Effective Income Tax Rates) (Details) |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Effective Tax Rate [Line Items] | ||||
Statutory federal income tax rate | 35.00% | 35.00% | 35.00% | 35.00% |
IPL's tax benefit riders | (13.10%) | (11.00%) | (10.20%) | (10.60%) |
Effect of rate-making on property-related differences | (11.90%) | (7.10%) | (8.20%) | (7.10%) |
Production tax credits | (9.00%) | (6.70%) | (7.20%) | (6.60%) |
Other items, net | 4.40% | 3.00% | 3.50% | 3.70% |
Overall income tax rate | 5.40% | 13.20% | 12.90% | 14.40% |
IPL [Member] | ||||
Effective Tax Rate [Line Items] | ||||
Statutory federal income tax rate | 35.00% | 35.00% | 35.00% | 35.00% |
IPL's tax benefit riders | (20.10%) | (30.00%) | (19.60%) | (28.20%) |
Effect of rate-making on property-related differences | (16.50%) | (18.70%) | (14.80%) | (17.90%) |
Production tax credits | (6.00%) | (8.60%) | (6.10%) | (8.00%) |
Other items, net | 5.40% | 3.70% | 4.20% | 4.20% |
Overall income tax rate | (2.20%) | (18.60%) | (1.30%) | (14.90%) |
WPL [Member] | ||||
Effective Tax Rate [Line Items] | ||||
Statutory federal income tax rate | 35.00% | 35.00% | 35.00% | 35.00% |
Effect of rate-making on property-related differences | (0.70%) | (0.70%) | (0.80%) | (0.60%) |
Production tax credits | (5.70%) | (6.10%) | (6.10%) | (6.30%) |
Other items, net | 4.00% | 4.10% | 4.40% | 4.20% |
Overall income tax rate | 32.60% | 32.30% | 32.50% | 32.30% |
Income Taxes (Summary Of Tax Credit Carryforwards) (Details) $ in Millions |
Sep. 30, 2016
USD ($)
|
---|---|
Carryforwards [Line Items] | |
Net operating losses, deferred tax assets | $ 496 |
IPL [Member] | |
Carryforwards [Line Items] | |
Net operating losses, deferred tax assets | 178 |
WPL [Member] | |
Carryforwards [Line Items] | |
Net operating losses, deferred tax assets | 192 |
Federal [Member] | |
Carryforwards [Line Items] | |
Net operating losses, carryforward amount | 587 |
Net operating losses, deferred tax assets | 201 |
Tax credits, carryforward amount | 264 |
Tax credits, deferred tax assets | 260 |
Federal [Member] | IPL [Member] | |
Carryforwards [Line Items] | |
Net operating losses, carryforward amount | 255 |
Net operating losses, deferred tax assets | 86 |
Tax credits, carryforward amount | 95 |
Tax credits, deferred tax assets | 91 |
Federal [Member] | WPL [Member] | |
Carryforwards [Line Items] | |
Net operating losses, carryforward amount | 242 |
Net operating losses, deferred tax assets | 85 |
Tax credits, carryforward amount | 108 |
Tax credits, deferred tax assets | 107 |
State [Member] | |
Carryforwards [Line Items] | |
Net operating losses, carryforward amount | 674 |
Net operating losses, deferred tax assets | 35 |
State [Member] | IPL [Member] | |
Carryforwards [Line Items] | |
Net operating losses, carryforward amount | 15 |
Net operating losses, deferred tax assets | 1 |
State [Member] | WPL [Member] | |
Carryforwards [Line Items] | |
Net operating losses, carryforward amount | 3 |
Net operating losses, deferred tax assets | $ 0 |
Benefit Plans (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended |
---|---|---|
Sep. 30, 2015 |
Sep. 30, 2016 |
|
Defined Benefit Plan Disclosure [Line Items] | ||
Percentage of employees accepting voluntary separation package | 2.00% | |
Voluntary employee separation charges | $ 8.0 | |
Unrecognized compensation cost | $ 8.2 | |
Minimum [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Unrecognized compensation cost recognized over a weighted average period | 1 year | |
Maximum [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Unrecognized compensation cost recognized over a weighted average period | 2 years | |
IPL [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Voluntary employee separation charges | 5.0 | |
WPL [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Voluntary employee separation charges | $ 3.0 | |
Performance Restricted Stock Unit And Performance Restricted Unit [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Performance period | 3 years | |
Actual number of shares paid out upon vesting, minimum percentage of target shares | 0.00% | |
Actual number of shares paid out upon vesting, maximum percentage of target shares | 200.00% | |
Performance Units [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Instrument valuation based on shares of common stock, number of shares | 1 | |
Performance Restricted Stock Unit [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Instrument valuation based on shares of common stock, number of shares | 1 | |
Performance Restricted Unit [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Instrument valuation based on shares of common stock, number of shares | 1 | |
Key Employee Performance Restricted Unit [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Instrument valuation based on shares of common stock, number of shares | 1 | |
Restricted Stock Unit And Restricted Unit [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Instrument valuation based on shares of common stock, number of shares | 1 | |
Performance period | 3 years |
Benefit Plans (Defined Benefit Pension And Other Postretirement Benefits Plans) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Defined benefit pension plans [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Service cost | $ 3.2 | $ 4.0 | $ 9.5 | $ 11.9 |
Interest cost | 13.2 | 13.5 | 39.7 | 40.3 |
Expected return on plan assets | (16.3) | (18.7) | (49.1) | (56.2) |
Amortization of prior service cost (credit) | (0.1) | (0.1) | (0.2) | (0.2) |
Amortization of actuarial loss | 9.3 | 8.8 | 28.0 | 26.5 |
Additional benefit costs | 0.0 | 0.1 | 0.0 | 0.4 |
Total | 9.3 | 7.6 | 27.9 | 22.7 |
OPEB Plans [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Service cost | 1.4 | 1.3 | 4.0 | 4.1 |
Interest cost | 2.3 | 2.3 | 7.0 | 6.8 |
Expected return on plan assets | (1.6) | (2.1) | (4.6) | (6.3) |
Amortization of prior service cost (credit) | (1.0) | (2.8) | (3.1) | (8.4) |
Amortization of actuarial loss | 1.2 | 1.2 | 3.6 | 3.6 |
Additional benefit costs | 0.0 | 0.0 | 0.0 | 0.0 |
Total | 2.3 | (0.1) | 6.9 | (0.2) |
IPL [Member] | Defined benefit pension plans [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Service cost | 1.8 | 2.2 | 5.6 | 6.6 |
Interest cost | 6.1 | 6.2 | 18.4 | 18.7 |
Expected return on plan assets | (7.7) | (8.9) | (23.2) | (26.8) |
Amortization of prior service cost (credit) | 0.0 | 0.0 | (0.1) | (0.1) |
Amortization of actuarial loss | 4.2 | 3.8 | 12.4 | 11.5 |
Total | 4.4 | 3.3 | 13.1 | 9.9 |
IPL [Member] | OPEB Plans [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Service cost | 0.5 | 0.6 | 1.7 | 1.8 |
Interest cost | 1.0 | 0.9 | 2.9 | 2.8 |
Expected return on plan assets | (1.0) | (1.4) | (3.2) | (4.2) |
Amortization of prior service cost (credit) | (0.7) | (1.5) | (2.0) | (4.6) |
Amortization of actuarial loss | 0.7 | 0.6 | 2.0 | 1.7 |
Total | 0.5 | (0.8) | 1.4 | (2.5) |
WPL [Member] | Defined benefit pension plans [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Service cost | 1.3 | 1.4 | 3.7 | 4.3 |
Interest cost | 5.5 | 5.6 | 16.7 | 16.9 |
Expected return on plan assets | (7.0) | (8.1) | (21.2) | (24.3) |
Amortization of prior service cost (credit) | 0.0 | 0.1 | 0.1 | 0.2 |
Amortization of actuarial loss | 4.4 | 4.2 | 13.2 | 12.6 |
Additional benefit costs | 0.0 | 0.1 | 0.0 | 0.4 |
Total | 4.2 | 3.3 | 12.5 | 10.1 |
WPL [Member] | OPEB Plans [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Service cost | 0.5 | 0.5 | 1.5 | 1.6 |
Interest cost | 0.9 | 0.9 | 2.8 | 2.7 |
Expected return on plan assets | (0.2) | (0.3) | (0.6) | (1.1) |
Amortization of prior service cost (credit) | (0.3) | (0.9) | (0.7) | (2.6) |
Amortization of actuarial loss | 0.5 | 0.6 | 1.4 | 1.7 |
Additional benefit costs | 0.0 | 0.0 | 0.0 | 0.0 |
Total | $ 1.4 | $ 0.8 | $ 4.4 | $ 2.3 |
Benefit Plans (Defined Contribution Retirement Plans) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
401(k) costs | $ 5.6 | $ 6.4 | $ 17.5 | $ 18.7 |
IPL [Member] | ||||
401(k) costs | 2.8 | 3.3 | 8.8 | 9.6 |
WPL [Member] | ||||
401(k) costs | $ 2.6 | $ 2.9 | $ 8.0 | $ 8.4 |
Benefit Plans (Recognized Compensation Expense And Income Tax Benefits) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Compensation expense | $ 4.4 | $ 0.3 | $ 16.8 | $ 5.8 |
Income tax benefits | 1.7 | 0.2 | 6.8 | 2.4 |
IPL [Member] | ||||
Compensation expense | 2.4 | 0.2 | 8.9 | 3.1 |
Income tax benefits | 1.0 | 0.1 | 3.7 | 1.3 |
WPL [Member] | ||||
Compensation expense | 1.9 | 0.1 | 7.3 | 2.5 |
Income tax benefits | $ 0.7 | $ 0.0 | $ 2.9 | $ 1.0 |
Benefit Plans (Summary Of Performance Shares and Performance Units Activity) (Details) - USD ($) $ in Millions |
9 Months Ended | |
---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Performance Shares [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | ||
Nonvested, January 1 (in shares/awards) | 288,430 | 288,848 |
Granted (in shares/awards) | 68,585 | 90,806 |
Vested (in shares/awards) | (98,186) | (91,224) |
Forfeited (in shares/awards) | (1,230) | 0 |
Nonvested, September 30 (in shares/awards) | 257,599 | 288,430 |
Performance Units [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | ||
Nonvested, January 1 (in shares/awards) | 116,412 | 127,330 |
Granted (in shares/awards) | 23,918 | 35,674 |
Vested (in shares/awards) | (42,760) | (45,690) |
Forfeited (in shares/awards) | (4,250) | (902) |
Nonvested, September 30 (in shares/awards) | 93,320 | 116,412 |
2013 Grant [Member] | Performance Shares [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | ||
Vested (in shares/awards) | (98,186) | |
Vested percentage of the target | 165.00% | |
Aggregate payout value | $ 5.1 | |
Payout - cash | $ 2.9 | |
Payout - common stock shares issued (in shares) | 22,408 | |
2013 Grant [Member] | Performance Units [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | ||
Vested (in shares/awards) | (42,760) | |
Vested percentage of the target | 165.00% | |
Aggregate payout value | $ 1.7 | |
Payout - cash | $ 1.7 | |
2012 Grant [Member] | Performance Shares [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | ||
Vested (in shares/awards) | (91,224) | |
Vested percentage of the target | 167.50% | |
Aggregate payout value | $ 5.1 | |
Payout - cash | $ 3.2 | |
Payout - common stock shares issued (in shares) | 21,950 | |
2012 Grant [Member] | Performance Units [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | ||
Vested (in shares/awards) | (45,690) | |
Vested percentage of the target | 167.50% | |
Aggregate payout value | $ 1.6 | |
Payout - cash | $ 1.6 |
Benefit Plans (Fair Values Of Nonvested Performance Shares And Units) (Details) - $ / shares |
9 Months Ended | |||
---|---|---|---|---|
Sep. 30, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Dec. 31, 2014 |
|
Performance Shares [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Nonvested awards (in shares/awards) | 257,599 | 288,430 | 288,430 | 288,848 |
Performance Units [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Nonvested awards (in shares/awards) | 93,320 | 116,412 | 116,412 | 127,330 |
2016 Grant [Member] | Performance Shares [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Nonvested awards (in shares/awards) | 67,355 | |||
Alliant Energy common stock closing price on September 30, 2016 (in dollars per share) | $ 38.31 | |||
Estimated payout percentage based on performance criteria | 125.00% | |||
Fair values of each nonvested award (in dollars per share) | $ 47.89 | |||
2016 Grant [Member] | Performance Units [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Nonvested awards (in shares/awards) | 22,657 | |||
Alliant Energy common stock closing price on September 30, 2016 (in dollars per share) | $ 38.31 | |||
Estimated payout percentage based on performance criteria | 125.00% | |||
Fair values of each nonvested award (in dollars per share) | $ 47.89 | |||
2015 Grant [Member] | Performance Shares [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Nonvested awards (in shares/awards) | 90,806 | |||
Alliant Energy common stock closing price on September 30, 2016 (in dollars per share) | $ 38.31 | |||
Estimated payout percentage based on performance criteria | 168.00% | |||
Fair values of each nonvested award (in dollars per share) | $ 64.36 | |||
2015 Grant [Member] | Performance Units [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Nonvested awards (in shares/awards) | 33,268 | |||
Alliant Energy common stock closing price on grant date (in dollars per share) | $ 32.55 | |||
Estimated payout percentage based on performance criteria | 168.00% | |||
Fair values of each nonvested award (in dollars per share) | $ 54.68 | |||
2014 Grant [Member] | Performance Shares [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Nonvested awards (in shares/awards) | 99,438 | |||
Alliant Energy common stock closing price on September 30, 2016 (in dollars per share) | $ 38.31 | |||
Estimated payout percentage based on performance criteria | 175.00% | |||
Fair values of each nonvested award (in dollars per share) | $ 67.04 | |||
2014 Grant [Member] | Performance Units [Member] | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Nonvested awards (in shares/awards) | 37,395 | |||
Alliant Energy common stock closing price on grant date (in dollars per share) | $ 26.89 | |||
Estimated payout percentage based on performance criteria | 175.00% | |||
Fair values of each nonvested award (in dollars per share) | $ 47.05 |
Benefit Plans (Summary Of Restricted Stock and Units Activity) (Details) - $ / shares |
9 Months Ended | ||||
---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
||||
Performance Contingent Restricted Stock [Member] | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | |||||
Nonvested, January 1 (in shares/awards) | 190,244 | 197,624 | |||
Nonvested, January 1, weighted average grant date fair value (in dollars per share) | $ 29.59 | $ 25.35 | |||
Granted (in shares/awards) | 0 | 90,806 | |||
Granted, weighted average grant date fair value (in dollars per share) | $ 0.00 | $ 32.55 | |||
Vested (in shares/awards) | [1] | 0 | (98,186) | ||
Vested, weighted average grant date fair value (in dollars per share) | [1] | $ 0.00 | $ 23.79 | ||
Nonvested, September 30 (in shares/awards) | 190,244 | 190,244 | |||
Nonvested, September 30, weighted average grant date fair value (in dollars per share) | $ 29.59 | $ 29.59 | |||
Performance Restricted Stock Unit [Member] | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | |||||
Granted (in shares/awards) | 68,585 | ||||
Granted, weighted average grant date fair value (in dollars per share) | $ 33.96 | ||||
Forfeited (in shares/awards) | (1,230) | ||||
Forfeited, weighted average grant date fair value (in dollars per share) | $ 33.90 | ||||
Nonvested, September 30 (in shares/awards) | 67,355 | ||||
Nonvested, September 30, weighted average grant date fair value (in dollars per share) | $ 33.96 | ||||
Performance Restricted Unit [Member] | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | |||||
Granted (in shares/awards) | 23,918 | ||||
Forfeited (in shares/awards) | (1,261) | ||||
Nonvested, September 30 (in shares/awards) | 22,657 | ||||
Key Employee Performance Restricted Unit [Member] | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | |||||
Granted (in shares/awards) | 45,056 | ||||
Forfeited (in shares/awards) | (2,016) | ||||
Nonvested, September 30 (in shares/awards) | 43,040 | ||||
Restricted Stock Units [Member] | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | |||||
Granted (in shares/awards) | 58,790 | ||||
Forfeited (in shares/awards) | (1,054) | ||||
Nonvested, September 30 (in shares/awards) | 57,736 | ||||
Restricted Units [Member] | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | |||||
Granted (in shares/awards) | 20,502 | ||||
Forfeited (in shares/awards) | (1,082) | ||||
Nonvested, September 30 (in shares/awards) | 19,420 | ||||
2013 Grant [Member] | Performance Contingent Restricted Stock [Member] | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | |||||
Vested (in shares/awards) | [1] | (98,186) | |||
|
Benefit Plans (Summary Of Performance Contingent Cash Awards Activity) (Details) - Performance Contingent Cash Awards [Member] - USD ($) $ in Millions |
9 Months Ended | ||||
---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | |||||
Nonvested, January 1 (in shares/awards) | 163,752 | 157,860 | |||
Granted (in shares/awards) | 0 | 82,210 | |||
Vested (in shares/awards) | [1] | 0 | (74,664) | ||
Forfeited (in shares/awards) | (3,652) | (1,654) | |||
Nonvested, September 30 (in shares/awards) | 160,100 | 163,752 | |||
2013 Grant [Member] | |||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] | |||||
Vested (in shares/awards) | [1] | (74,664) | |||
Cash payout value | [1] | $ 2.4 | |||
|
Asset Retirement Obligations (Reconciliation Of Changes In Asset Retirement Obligations) (Details) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||
---|---|---|---|---|---|---|---|---|
Jun. 30, 2015
USD ($)
|
Sep. 30, 2016
USD ($)
|
Sep. 30, 2015
USD ($)
|
||||||
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||
Balance, January 1 | $ 214.0 | $ 114.0 | ||||||
Revisions in estimated cash flows | [1] | 3.9 | 8.9 | |||||
Liabilities settled | (11.2) | (7.1) | ||||||
Liabilities incurred | $ 74.0 | 2.6 | [1] | 76.1 | [1] | |||
Accretion expense | 4.8 | 3.4 | ||||||
Balance, September 30 | 214.1 | 195.3 | ||||||
IPL [Member] | ||||||||
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||
Balance, January 1 | 132.9 | 51.8 | ||||||
Revisions in estimated cash flows | [1] | 4.2 | 11.9 | |||||
Liabilities settled | (5.0) | (3.1) | ||||||
Liabilities incurred | 57.0 | 0.7 | [1] | 59.9 | [1] | |||
Accretion expense | 2.8 | 1.6 | ||||||
Balance, September 30 | $ 135.6 | 122.1 | ||||||
Electric generating units with coal ash ponds (in number of electric generating units) | 9 | |||||||
Active coal combustion residuals landfills (in number of landfills) | 4 | |||||||
WPL [Member] | ||||||||
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||
Balance, January 1 | $ 71.9 | 52.4 | ||||||
Revisions in estimated cash flows | [1] | (0.3) | (1.9) | |||||
Liabilities settled | (6.2) | (4.0) | ||||||
Liabilities incurred | $ 17.0 | 1.9 | [1] | 16.2 | [1] | |||
Accretion expense | 1.7 | 1.4 | ||||||
Balance, September 30 | $ 69.0 | $ 64.1 | ||||||
Electric generating units with coal ash ponds (in number of electric generating units) | 3 | |||||||
Active coal combustion residuals landfills (in number of landfills) | 2 | |||||||
|
Fair Value Measurements (Narrative) (Details) |
9 Months Ended |
---|---|
Sep. 30, 2016 | |
IPL [Member] | |
Cumulative preferred stock rate | 5.10% |
Fair Value Measurements (Fair Value Measurements) (Details) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
---|---|---|
Assets: | ||
Deferred proceeds | $ 239.7 | $ 172.0 |
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 4,871.6 | 4,336.1 |
Cumulative preferred stock of IPL | 215.4 | 206.6 |
IPL [Member] | ||
Assets: | ||
Deferred proceeds | 239.7 | 172.0 |
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 2,495.8 | 2,092.7 |
Cumulative preferred stock of IPL | 215.4 | 206.6 |
WPL [Member] | ||
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 1,920.4 | 1,793.0 |
Commodity Contracts [Member] | ||
Assets: | ||
Derivatives | 27.8 | 18.4 |
Liabilities and Equity: | ||
Derivatives | 36.9 | 64.6 |
Commodity Contracts [Member] | IPL [Member] | ||
Assets: | ||
Derivatives | 22.2 | 15.5 |
Liabilities and Equity: | ||
Derivatives | 9.0 | 23.4 |
Commodity Contracts [Member] | WPL [Member] | ||
Assets: | ||
Derivatives | 5.6 | 2.9 |
Liabilities and Equity: | ||
Derivatives | 27.9 | 41.2 |
Level 1 [Member] | ||
Assets: | ||
Deferred proceeds | 0.0 | 0.0 |
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 0.0 | 0.0 |
Cumulative preferred stock of IPL | 215.4 | 206.6 |
Level 1 [Member] | IPL [Member] | ||
Assets: | ||
Deferred proceeds | 0.0 | 0.0 |
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 0.0 | 0.0 |
Cumulative preferred stock of IPL | 215.4 | 206.6 |
Level 1 [Member] | WPL [Member] | ||
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 0.0 | 0.0 |
Level 1 [Member] | Commodity Contracts [Member] | ||
Assets: | ||
Derivatives | 0.0 | 0.0 |
Liabilities and Equity: | ||
Derivatives | 0.0 | 0.0 |
Level 1 [Member] | Commodity Contracts [Member] | IPL [Member] | ||
Assets: | ||
Derivatives | 0.0 | 0.0 |
Liabilities and Equity: | ||
Derivatives | 0.0 | 0.0 |
Level 1 [Member] | Commodity Contracts [Member] | WPL [Member] | ||
Assets: | ||
Derivatives | 0.0 | 0.0 |
Liabilities and Equity: | ||
Derivatives | 0.0 | 0.0 |
Level 2 [Member] | ||
Assets: | ||
Deferred proceeds | 0.0 | 0.0 |
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 4,868.3 | 4,332.4 |
Cumulative preferred stock of IPL | 0.0 | 0.0 |
Level 2 [Member] | IPL [Member] | ||
Assets: | ||
Deferred proceeds | 0.0 | 0.0 |
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 2,495.8 | 2,092.7 |
Cumulative preferred stock of IPL | 0.0 | 0.0 |
Level 2 [Member] | WPL [Member] | ||
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 1,920.4 | 1,793.0 |
Level 2 [Member] | Commodity Contracts [Member] | ||
Assets: | ||
Derivatives | 1.9 | 2.5 |
Liabilities and Equity: | ||
Derivatives | 3.1 | 16.0 |
Level 2 [Member] | Commodity Contracts [Member] | IPL [Member] | ||
Assets: | ||
Derivatives | 1.2 | 2.0 |
Liabilities and Equity: | ||
Derivatives | 1.4 | 8.0 |
Level 2 [Member] | Commodity Contracts [Member] | WPL [Member] | ||
Assets: | ||
Derivatives | 0.7 | 0.5 |
Liabilities and Equity: | ||
Derivatives | 1.7 | 8.0 |
Level 3 [Member] | ||
Assets: | ||
Deferred proceeds | 239.7 | 172.0 |
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 3.3 | 3.7 |
Cumulative preferred stock of IPL | 0.0 | 0.0 |
Level 3 [Member] | IPL [Member] | ||
Assets: | ||
Deferred proceeds | 239.7 | 172.0 |
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 0.0 | 0.0 |
Cumulative preferred stock of IPL | 0.0 | 0.0 |
Level 3 [Member] | WPL [Member] | ||
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 0.0 | 0.0 |
Level 3 [Member] | Commodity Contracts [Member] | ||
Assets: | ||
Derivatives | 25.9 | 15.9 |
Liabilities and Equity: | ||
Derivatives | 33.8 | 48.6 |
Level 3 [Member] | Commodity Contracts [Member] | IPL [Member] | ||
Assets: | ||
Derivatives | 21.0 | 13.5 |
Liabilities and Equity: | ||
Derivatives | 7.6 | 15.4 |
Level 3 [Member] | Commodity Contracts [Member] | WPL [Member] | ||
Assets: | ||
Derivatives | 4.9 | 2.4 |
Liabilities and Equity: | ||
Derivatives | 26.2 | 33.2 |
Carrying Amount [Member] | ||
Assets: | ||
Deferred proceeds | 239.7 | 172.0 |
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 4,130.9 | 3,835.6 |
Cumulative preferred stock of IPL | 200.0 | 200.0 |
Carrying Amount [Member] | IPL [Member] | ||
Assets: | ||
Deferred proceeds | 239.7 | 172.0 |
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 2,153.1 | 1,856.9 |
Cumulative preferred stock of IPL | 200.0 | 200.0 |
Carrying Amount [Member] | WPL [Member] | ||
Liabilities and Equity: | ||
Long-term debt (including current maturities) | 1,534.9 | 1,533.9 |
Carrying Amount [Member] | Commodity Contracts [Member] | ||
Assets: | ||
Derivatives | 27.8 | 18.4 |
Liabilities and Equity: | ||
Derivatives | 36.9 | 64.6 |
Carrying Amount [Member] | Commodity Contracts [Member] | IPL [Member] | ||
Assets: | ||
Derivatives | 22.2 | 15.5 |
Liabilities and Equity: | ||
Derivatives | 9.0 | 23.4 |
Carrying Amount [Member] | Commodity Contracts [Member] | WPL [Member] | ||
Assets: | ||
Derivatives | 5.6 | 2.9 |
Liabilities and Equity: | ||
Derivatives | $ 27.9 | $ 41.2 |
Fair Value Measurements (Fair Value Measurements Using Significant Unobservable Inputs) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||||
---|---|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
||||
Commodity Contracts [Member] | |||||||
Fair Value, Assets and Liabilities, Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |||||||
Beginning balance | $ 0.6 | $ 0.6 | $ (32.7) | $ 17.9 | |||
Total net gains (losses) included in changes in net assets (realized/unrealized) | (5.1) | (21.1) | 8.0 | (58.2) | |||
Transfers into Level 3 | 0.9 | 0.0 | |||||
Transfers out of Level 3 | 0.8 | 0.0 | 1.2 | 0.6 | |||
Purchases | 22.0 | 36.9 | |||||
Sales | (0.2) | (0.4) | (0.9) | (1.7) | |||
Settlements | [1] | (4.0) | (3.7) | (6.4) | (20.1) | ||
Ending balance | (7.9) | (24.6) | (7.9) | (24.6) | |||
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30 | (5.0) | (18.4) | 9.7 | (52.2) | |||
Commodity Contracts [Member] | IPL [Member] | |||||||
Fair Value, Assets and Liabilities, Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |||||||
Beginning balance | 18.3 | 18.3 | (1.9) | 19.4 | |||
Total net gains (losses) included in changes in net assets (realized/unrealized) | (0.4) | (8.6) | 4.8 | (26.0) | |||
Transfers into Level 3 | 0.5 | 0.0 | |||||
Transfers out of Level 3 | 0.3 | 0.0 | 0.2 | 0.0 | |||
Purchases | 20.6 | 33.1 | |||||
Sales | (0.2) | (0.4) | (0.9) | (1.6) | |||
Settlements | [1] | (4.6) | (5.5) | (9.9) | (21.1) | ||
Ending balance | 13.4 | 3.8 | 13.4 | 3.8 | |||
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30 | (0.4) | (8.0) | 5.7 | (21.2) | |||
Commodity Contracts [Member] | WPL [Member] | |||||||
Fair Value, Assets and Liabilities, Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |||||||
Beginning balance | (17.7) | (17.7) | (30.8) | (1.5) | |||
Total net gains (losses) included in changes in net assets (realized/unrealized) | (4.7) | (12.5) | 3.2 | (32.2) | |||
Transfers into Level 3 | 0.4 | 0.0 | |||||
Transfers out of Level 3 | 0.5 | 0.0 | 1.0 | 0.6 | |||
Purchases | 1.4 | 3.8 | |||||
Sales | 0.0 | (0.1) | |||||
Settlements | 0.6 | 1.8 | 3.5 | 1.0 | |||
Ending balance | (21.3) | (28.4) | (21.3) | (28.4) | |||
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30 | (4.6) | (10.4) | 4.0 | (31.0) | |||
Deferred Proceeds [Member] | |||||||
Fair Value, Assets and Liabilities, Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |||||||
Beginning balance | 74.4 | 73.4 | 172.0 | 177.2 | |||
Total net gains (losses) included in changes in net assets (realized/unrealized) | 0.0 | 0.0 | 0.0 | 0.0 | |||
Transfers into Level 3 | 0.0 | 0.0 | |||||
Transfers out of Level 3 | 0.0 | 0.0 | 0.0 | 0.0 | |||
Purchases | 0.0 | 0.0 | |||||
Sales | 0.0 | 0.0 | 0.0 | 0.0 | |||
Settlements | [1] | 165.3 | 122.1 | 67.7 | 18.3 | ||
Ending balance | 239.7 | 195.5 | 239.7 | 195.5 | |||
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30 | 0.0 | 0.0 | 0.0 | 0.0 | |||
Deferred Proceeds [Member] | IPL [Member] | |||||||
Fair Value, Assets and Liabilities, Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |||||||
Beginning balance | 74.4 | 73.4 | 172.0 | 177.2 | |||
Total net gains (losses) included in changes in net assets (realized/unrealized) | 0.0 | 0.0 | 0.0 | 0.0 | |||
Transfers into Level 3 | 0.0 | 0.0 | |||||
Transfers out of Level 3 | 0.0 | 0.0 | 0.0 | 0.0 | |||
Purchases | 0.0 | 0.0 | |||||
Sales | 0.0 | 0.0 | 0.0 | 0.0 | |||
Settlements | [1] | 165.3 | 122.1 | 67.7 | 18.3 | ||
Ending balance | 239.7 | 195.5 | 239.7 | 195.5 | |||
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30 | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 | |||
|
Fair Value Measurements (Fair Value Of Net Derivative Assets (Liabilities)) (Details) - Commodity Contracts [Member] - USD ($) $ in Millions |
Sep. 30, 2016 |
Jun. 30, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Dec. 31, 2014 |
---|---|---|---|---|---|---|
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||
Fair value, net derivative assets | $ (7.9) | $ 0.6 | $ (32.7) | $ (24.6) | $ 0.6 | $ 17.9 |
Excluding Financial Transmission Rights [Member] | ||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||
Fair value, net derivative liabilities | (26.3) | (43.1) | ||||
Financial Transmission Rights [Member] | ||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||
Fair value, net derivative assets | 18.4 | 10.4 | ||||
IPL [Member] | ||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||
Fair value, net derivative assets | 13.4 | 18.3 | (1.9) | 3.8 | 18.3 | 19.4 |
IPL [Member] | Excluding Financial Transmission Rights [Member] | ||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||
Fair value, net derivative liabilities | (3.5) | (12.3) | ||||
IPL [Member] | Financial Transmission Rights [Member] | ||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||
Fair value, net derivative assets | 16.9 | 10.4 | ||||
WPL [Member] | ||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||
Fair value, net derivative assets | (21.3) | $ (17.7) | (30.8) | $ (28.4) | $ (17.7) | $ (1.5) |
WPL [Member] | Excluding Financial Transmission Rights [Member] | ||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||
Fair value, net derivative liabilities | (22.8) | (30.8) | ||||
WPL [Member] | Financial Transmission Rights [Member] | ||||||
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||||
Fair value, net derivative assets | $ 1.5 | $ 0.0 |
Derivative Instruments (Notional Amounts Of Derivative Instruments) (Details) - Commodity [Member] gal in Thousands, T in Thousands, MWh in Thousands, Dekatherms in Thousands |
9 Months Ended |
---|---|
Sep. 30, 2016
Dekatherms
MWh
T
gal
| |
Electricity (MWhs) [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in MWhs) | 3,427 |
Electricity (MWhs) [Member] | IPL [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in MWhs) | 187 |
Electricity (MWhs) [Member] | WPL [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in MWhs) | 3,240 |
FTRs (MWhs) [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in MWhs) | 14,437 |
FTRs (MWhs) [Member] | IPL [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in MWhs) | 8,865 |
FTRs (MWhs) [Member] | WPL [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in MWhs) | 5,572 |
Natural Gas (Dths) [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in Dths) | Dekatherms | 82,277 |
Natural Gas (Dths) [Member] | IPL [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in Dths) | Dekatherms | 47,141 |
Natural Gas (Dths) [Member] | WPL [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in Dths) | Dekatherms | 35,136 |
Coal (Tons) [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in Tons) | T | 4,640 |
Coal (Tons) [Member] | IPL [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in Tons) | T | 2,202 |
Coal (Tons) [Member] | WPL [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in Tons) | T | 2,438 |
Diesel Fuel (Gallons) [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in Gallons) | gal | 3,780 |
Diesel Fuel (Gallons) [Member] | IPL [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in Gallons) | gal | 0 |
Diesel Fuel (Gallons) [Member] | WPL [Member] | |
Notional Amount of Derivatives [Line Items] | |
Notional unit amount of derivatives (in Gallons) | gal | 3,780 |
Derivative Instruments (Fair Value Of Financial Instruments) (Details) - Commodity Contracts [Member] - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
---|---|---|
Derivatives, Fair Value [Line Items] | ||
Current derivative assets | $ 25.1 | $ 15.1 |
Non-current derivative assets | 2.7 | 3.3 |
Current derivative liabilities | 21.2 | 47.3 |
Non-current derivative liabilities | 15.7 | 17.3 |
IPL [Member] | ||
Derivatives, Fair Value [Line Items] | ||
Current derivative assets | 20.5 | 13.8 |
Non-current derivative assets | 1.7 | 1.7 |
Current derivative liabilities | 5.4 | 18.5 |
Non-current derivative liabilities | 3.6 | 4.9 |
WPL [Member] | ||
Derivatives, Fair Value [Line Items] | ||
Current derivative assets | 4.6 | 1.3 |
Non-current derivative assets | 1.0 | 1.6 |
Current derivative liabilities | 15.8 | 28.8 |
Non-current derivative liabilities | $ 12.1 | $ 12.4 |
Commitments And Contingencies (Narrative) (Details) $ in Millions |
9 Months Ended |
---|---|
Sep. 30, 2016
USD ($)
site
| |
Commitments and Contingencies [Line Items] | |
Minimum future commitments | $ 2,238 |
Performance guarantees outstanding | 123 |
Present value abandonment obligation | 30 |
IPL [Member] | |
Commitments and Contingencies [Line Items] | |
Minimum future commitments | 1,649 |
Maximum indemnification limit | $ 17 |
Number of sites monitoring and remediating (in sites) | site | 23 |
WPL [Member] | |
Commitments and Contingencies [Line Items] | |
Minimum future commitments | $ 573 |
Number of sites monitoring and remediating (in sites) | site | 5 |
Capital Purchase Obligation [Member] | |
Commitments and Contingencies [Line Items] | |
Minimum future commitments | $ 27 |
Capital Purchase Obligation [Member] | IPL [Member] | |
Commitments and Contingencies [Line Items] | |
Minimum future commitments | 1 |
Capital Purchase Obligation [Member] | WPL [Member] | |
Commitments and Contingencies [Line Items] | |
Minimum future commitments | 26 |
Performance guarantees outstanding, 2016 [Member] | |
Commitments and Contingencies [Line Items] | |
Performance guarantees outstanding | 48 |
Performance guarantees outstanding, 2017 [Member] | |
Commitments and Contingencies [Line Items] | |
Performance guarantees outstanding | 75 |
Environmental Issue [Member] | IPL [Member] | |
Commitments and Contingencies [Line Items] | |
Environmental mitigation projects to be completed, value | 6 |
Environmental Issue [Member] | WPL [Member] | |
Commitments and Contingencies [Line Items] | |
Environmental mitigation projects to be completed, value | $ 7 |
Minimum [Member] | |
Commitments and Contingencies [Line Items] | |
Warranty period | 12 months |
Maximum [Member] | |
Commitments and Contingencies [Line Items] | |
Warranty period | 60 months |
Commitments And Contingencies (Operating Expense Purchase Obligations) (Details) $ in Millions |
9 Months Ended | |||||||
---|---|---|---|---|---|---|---|---|
Sep. 30, 2016
USD ($)
| ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | $ 2,238 | |||||||
Individual commitments incurred | 1 | |||||||
IPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 1,649 | |||||||
Individual commitments incurred | 1 | |||||||
WPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 573 | |||||||
Individual commitments incurred | 1 | |||||||
DAEC (IPL) [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 1,320 | [1] | ||||||
DAEC (IPL) [Member] | IPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 1,320 | [1] | ||||||
DAEC (IPL) [Member] | WPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 0 | [1] | ||||||
Other [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 139 | [1] | ||||||
Other [Member] | IPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 1 | [1] | ||||||
Other [Member] | WPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 138 | [1] | ||||||
Purchased Power [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 1,459 | [1] | ||||||
Purchased Power [Member] | IPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 1,321 | [1] | ||||||
Purchased Power [Member] | WPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 138 | [1] | ||||||
Natural gas [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 557 | |||||||
Natural gas [Member] | IPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 231 | |||||||
Natural gas [Member] | WPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 326 | |||||||
Coal [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 193 | [2] | ||||||
Coal [Member] | IPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 85 | [2] | ||||||
Coal [Member] | WPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 108 | [2] | ||||||
SO2 emission allowances [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 8 | |||||||
SO2 emission allowances [Member] | IPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 8 | |||||||
SO2 emission allowances [Member] | WPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 0 | |||||||
Other [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 21 | [3] | ||||||
Other [Member] | IPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | 4 | [3] | ||||||
Other [Member] | WPL [Member] | ||||||||
Commitments and Contingencies [Line Items] | ||||||||
Minimum future commitments | $ 1 | [3] | ||||||
|
Commitments And Contingencies (MPG Site Estimated Future Costs And Recorded Liabilities) (Details) - Manufactured Gas Plant Sites [Member] $ in Millions |
9 Months Ended |
---|---|
Sep. 30, 2016
USD ($)
| |
Commitments and Contingencies [Line Items] | |
Minimum range of estimated future costs | $ 11 |
Maximum range of estimated future costs | 27 |
Current and non-current environmental liabilities | 15 |
IPL [Member] | |
Commitments and Contingencies [Line Items] | |
Minimum range of estimated future costs | 9 |
Maximum range of estimated future costs | 23 |
Current and non-current environmental liabilities | 12 |
WPL [Member] | |
Commitments and Contingencies [Line Items] | |
Minimum range of estimated future costs | 2 |
Maximum range of estimated future costs | 4 |
Current and non-current environmental liabilities | $ 3 |
Segments Of Business (Schedule Of Segments Of Business) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Segment Reporting Information [Line Items] | ||||
Operating revenues | $ 924.6 | $ 898.9 | $ 2,523.0 | $ 2,513.5 |
Operating income (loss) | 162.6 | 235.9 | 437.1 | 497.8 |
Income (loss) from continuing operations, net of tax | 128.8 | 180.0 | 310.8 | 345.5 |
Loss from discontinued operations, net of tax | (0.4) | (0.1) | (2.0) | (1.4) |
Net income (loss) attributable to common shareowners | 128.4 | 179.9 | 308.8 | 344.1 |
IPL [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 516.2 | 504.6 | 1,385.9 | 1,375.8 |
Operating income (loss) | 125.9 | 117.0 | 235.9 | 216.3 |
Net income (loss) attributable to common shareowners | 114.1 | 116.5 | 191.6 | 180.5 |
WPL [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 397.0 | 382.6 | 1,106.9 | 1,104.4 |
Operating income (loss) | 115.0 | 110.3 | 268.8 | 259.4 |
Net income (loss) attributable to common shareowners | 69.0 | 68.0 | 158.7 | 152.1 |
Electric [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 864.3 | 835.8 | 2,209.1 | 2,147.5 |
Operating income (loss) | 244.2 | 232.8 | 473.3 | 438.4 |
Electric [Member] | IPL [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 483.2 | 468.6 | 1,209.2 | 1,170.6 |
Operating income (loss) | 125.9 | 119.4 | 213.8 | 193.6 |
Electric [Member] | WPL [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 381.1 | 367.2 | 999.9 | 976.9 |
Operating income (loss) | 118.3 | 113.4 | 259.5 | 244.8 |
Gas [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 39.5 | 38.0 | 248.7 | 288.1 |
Operating income (loss) | (3.7) | (5.7) | 27.0 | 28.6 |
Gas [Member] | IPL [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 23.9 | 23.1 | 142.6 | 164.1 |
Operating income (loss) | (1.4) | (2.9) | 15.3 | 15.3 |
Gas [Member] | WPL [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 15.6 | 14.9 | 106.1 | 124.0 |
Operating income (loss) | (2.3) | (2.8) | 11.7 | 13.3 |
Other Utilities [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 9.4 | 13.4 | 35.0 | 44.6 |
Operating income (loss) | 0.4 | 0.2 | 4.4 | 8.7 |
Other Utilities [Member] | IPL [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 9.1 | 12.9 | 34.1 | 41.1 |
Operating income (loss) | 1.4 | 0.5 | 6.8 | 7.4 |
Other Utilities [Member] | WPL [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 0.3 | 0.5 | 0.9 | 3.5 |
Operating income (loss) | (1.0) | (0.3) | (2.4) | 1.3 |
Utility Business [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 913.2 | 887.2 | 2,492.8 | 2,480.2 |
Operating income (loss) | 240.9 | 227.3 | 504.7 | 475.7 |
Income (loss) from continuing operations, net of tax | 183.1 | 184.5 | 350.3 | 332.6 |
Loss from discontinued operations, net of tax | 0.0 | 0.0 | 0.0 | 0.0 |
Net income (loss) attributable to common shareowners | 183.1 | 184.5 | 350.3 | 332.6 |
Non-Regulated [Member] | Other Segments [Member] | ||||
Segment Reporting Information [Line Items] | ||||
Operating revenues | 11.4 | 11.7 | 30.2 | 33.3 |
Operating income (loss) | (78.3) | 8.6 | (67.6) | 22.1 |
Income (loss) from continuing operations, net of tax | (54.3) | (4.5) | (39.5) | 12.9 |
Loss from discontinued operations, net of tax | (0.4) | (0.1) | (2.0) | (1.4) |
Net income (loss) attributable to common shareowners | $ (54.7) | $ (4.6) | $ (41.5) | $ 11.5 |
Related Parties (Narrative) (Details) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
---|---|---|
WPL [Member] | WPL Owed ATC [Member] | ||
Related Party Transactions [Line Items] | ||
Net amounts due from (to) related party | $ (9) | $ (8) |
Related Parties (Service Agreements) (Details) - Corporate Services [Member] - Subsidiary of Common Parent [Member] - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Administrative and General Services Billings [Member] | IPL [Member] | ||||
Related Party Transactions [Line Items] | ||||
Amounts billed between related parties | $ 41 | $ 38 | $ 124 | $ 114 |
Administrative and General Services Billings [Member] | WPL [Member] | ||||
Related Party Transactions [Line Items] | ||||
Amounts billed between related parties | 33 | 30 | 103 | 90 |
Sales Credited [Member] | IPL [Member] | ||||
Related Party Transactions [Line Items] | ||||
Amounts billed between related parties | 4 | 2 | 7 | 8 |
Sales Credited [Member] | WPL [Member] | ||||
Related Party Transactions [Line Items] | ||||
Amounts billed between related parties | 3 | 9 | 6 | 21 |
Purchases Billed [Member] | IPL [Member] | ||||
Related Party Transactions [Line Items] | ||||
Amounts billed between related parties | 126 | 110 | 324 | 278 |
Purchases Billed [Member] | WPL [Member] | ||||
Related Party Transactions [Line Items] | ||||
Amounts billed between related parties | $ 23 | $ 16 | $ 65 | $ 49 |
Related Parties (Net Intercompany Payables) (Details) - Subsidiary of Common Parent [Member] - Corporate Services [Member] - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
---|---|---|
IPL [Member] | ||
Related Party Transactions [Line Items] | ||
Net amounts due from (to) related party | $ (114) | $ (93) |
WPL [Member] | ||
Related Party Transactions [Line Items] | ||
Net amounts due from (to) related party | $ (68) | $ (54) |
Related Parties (Amounts Billed Between Parties) (Details) - ATC [Member] - WPL [Member] - Equity Method Investment [Member] - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
ATC Billings To WPL [Member] | ||||
Related Party Transactions [Line Items] | ||||
Amounts billed between related parties | $ 28 | $ 25 | $ 82 | $ 75 |
WPL Billings To ATC [Member] | ||||
Related Party Transactions [Line Items] | ||||
Amounts billed between related parties | $ 4 | $ 4 | $ 10 | $ 9 |
Discontinued Operations (Components Of Discontinued Operations In Consolidated Statements Of Income (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Discontinued Operations and Disposal Groups [Abstract] | ||||
Operating expenses | $ 0.6 | $ 0.3 | $ 3.3 | $ 2.3 |
Loss before income taxes | (0.6) | (0.3) | (3.3) | (2.3) |
Income tax benefit | (0.2) | (0.2) | (1.3) | (0.9) |
Loss from discontinued operations, net of tax | $ (0.4) | $ (0.1) | $ (2.0) | $ (1.4) |
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