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Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Cash flows from operating activities: |  |  |
Net income | $ 376.2 | $ 335.7 | $ 321.9
Adjustments to reconcile net income to net cash flows from operating activities: |  |  |
Depreciation and amortization | 370.9 | 332.9 | 323.8
Other amortizations | 40.2 | 55.0 | 56.3
Deferred tax expense (benefit) and investment tax credits | 108.3 | 143.3 | 10.2
Equity (income) loss from unconsolidated investments, net | (43.7) | (41.3) | (39.3)
Distributions from equity method investments | 35.4 | 34.2 | 32.3
Equity component of allowance for funds used during construction | (20.3) | (14.1) | (7.6)
Non-cash valuation charges and other | (3.7) | 0.7 | 20.3
Other changes in assets and liabilities: |  |  |
Accounts receivable | (49.2) | 61.3 | (54.3)
Sales of accounts receivable | (101.0) | (10.0) | 75.0
Regulatory assets | 140.5 | (178.1) | (413.1)
Regulatory liabilities | (90.8) | 16.4 | 168.3
Deferred income taxes | 101.9 | 69.7 | 147.3
Pension and other benefit obligations | (157.4) | 51.3 | 8.9
Other | 23.7 | (15.9) | 52.7
Net cash flows from operating activities | 731.0 | 841.1 | 702.7
Cash flows used for investing activities: |  |  |
Utility business - Riverside Energy Center | 0 | (403.5) | 0
Utility business - other | (731.6) | (622.0) | (608.1)
Alliant Energy Corporate Services, Inc. and non-regulated businesses | (66.7) | (132.6) | (65.3)
Proceeds from Franklin County wind project cash grant | 62.4 | 0 | 0
Collections of advances for customer energy efficiency projects | 16.6 | 22.9 | 31.0
Other | (35.4) | (20.3) | (9.7)
Net cash flows used for investing activities | (754.7) | (1,155.5) | (652.1)
Cash flows from (used for) financing activities: |  |  |
Common stock dividends | (208.3) | (199.3) | (188.1)
Preferred dividends paid by subsidiaries | (11.4) | (15.9) | (16.8)
Payments to redeem cumulative preferred stock | (211.0) | 0 | (40.0)
Proceeds from issuance of cumulative preferred stock of IPL | 200.0 | 0 | 0
Proceeds from issuance of long-term debt | 250.0 | 385.0 | 0.4
Net change in commercial paper | 11.9 | 164.7 | 55.4
Other | (18.9) | (10.3) | (9.4)
Net cash flows from (used for) financing activities | 12.3 | 324.2 | (198.5)
Net increase (decrease) in cash and cash equivalents | (11.4) | 9.8 | (147.9)
Cash and cash equivalents at beginning of period | 21.2 | 11.4 | 159.3
Cash and cash equivalents at end of period | 9.8 | 21.2 | 11.4
Supplemental cash flows information: |  |  |
Interest, net of capitalized interest | 171.7 | 155.2 | 157.6
Income taxes, net of refunds | (9.6) | (20.3) | (10.8)
Significant non-cash investing and financing activities: |  |  |
Accrued capital expenditures | 103.8 | 105.3 | 49.7
IPL [Member] |  |  |
Cash flows from operating activities: |  |  |
Net income | 189.9 | 150.2 | 139.3
Adjustments to reconcile net income to net cash flows from operating activities: |  |  |
Depreciation and amortization | 191.1 | 188.9 | 179.1
Deferred tax expense (benefit) and investment tax credits | 4.2 | 19.3 | (58.6)
Equity component of allowance for funds used during construction | (13.8) | (5.2) | (3.5)
Non-cash valuation charges and other | (0.7) | 10.6 | 23.5
Other changes in assets and liabilities: |  |  |
Accounts receivable | (55.9) | (0.7) | 22.4
Sales of accounts receivable | (101.0) | (10.0) | 75.0
Regulatory assets | 71.4 | (129.0) | (328.8)
Regulatory liabilities | (82.3) | (12.1) | 156.3
Deferred income taxes | 92.4 | 64.6 | 145.5
Pension and other benefit obligations | (74.3) | 21.0 | (8.3)
Other | 11.6 | (6.6) | 25.0
Net cash flows from operating activities | 232.6 | 291.0 | 366.9
Cash flows used for investing activities: |  |  |
Utility business - other | (400.2) | (307.5) | (293.7)
Proceeds from sale of wind project assets to affiliate | 0 | 0 | 115.3
Other | (23.1) | (23.7) | (22.2)
Net cash flows used for investing activities | (423.3) | (331.2) | (200.6)
Cash flows from (used for) financing activities: |  |  |
Common stock dividends | (128.1) | (122.9) | (73.4)
Preferred dividends paid by subsidiaries | (10.8) | (12.6) | (13.5)
Capital contributions from parent | 120.0 | 110.0 | 54.0
Repayment of capital to parent | 0 | 0 | (100.7)
Payments to redeem cumulative preferred stock | (150.0) | 0 | (40.0)
Proceeds from issuance of cumulative preferred stock of IPL | 200.0 | 0 | 0
Proceeds from issuance of long-term debt | 250.0 | 0 | 0
Net change in commercial paper | (76.3) | 69.2 | 7.1
Other | (14.2) | (1.1) | (3.4)
Net cash flows from (used for) financing activities | 190.6 | 42.6 | (169.9)
Net increase (decrease) in cash and cash equivalents | (0.1) | 2.4 | (3.6)
Cash and cash equivalents at beginning of period | 4.5 | 2.1 | 5.7
Cash and cash equivalents at end of period | 4.4 | 4.5 | 2.1
Supplemental cash flows information: |  |  |
Interest, net of capitalized interest | 80.7 | 78.3 | 78.0
Income taxes, net of refunds | (0.1) | 3.3 | 25.3
Significant non-cash investing and financing activities: |  |  |
Accrued capital expenditures | 58.1 | 53.4 | 23.9
WPL [Member] |  |  |
Cash flows from operating activities: |  |  |
Net income | 177.5 | 165.7 | 163.5
Adjustments to reconcile net income to net cash flows from operating activities: |  |  |
Depreciation and amortization | 172.2 | 140.9 | 140.1
Other amortizations | 29.5 | 43.7 | 42.4
Deferred tax expense (benefit) and investment tax credits | 86.5 | 88.6 | 93.7
Equity (income) loss from unconsolidated investments, net | (43.7) | (42.1) | (38.7)
Distributions from equity method investments | 35.4 | 34.2 | 32.3
Equity component of allowance for funds used during construction | (6.5) | (8.9) | (4.1)
Non-cash valuation charges and other | (0.2) | (2.9) | 10.8
Other changes in assets and liabilities: |  |  |
Income tax refunds receivable | (0.3) | (2.9) | 39.9
Regulatory assets | 69.1 | (49.1) | (84.3)
Regulatory liabilities | (8.5) | 28.5 | 12.0
Accrued taxes | (26.9) | 19.2 | (2.1)
Pension and other benefit obligations | (71.3) | 31.7 | 8.8
Other | 10.5 | (19.2) | 14.5
Net cash flows from operating activities | 423.3 | 427.4 | 428.8
Cash flows used for investing activities: |  |  |
Utility business - Riverside Energy Center | 0 | (403.5) | 0
Utility business - other | (331.4) | (314.5) | (314.4)
Collections of advances for customer energy efficiency projects | 15.8 | 20.9 | 26.8
Other | (20.3) | (13.1) | (17.8)
Net cash flows used for investing activities | (335.9) | (710.2) | (305.4)
Cash flows from (used for) financing activities: |  |  |
Common stock dividends | (116.3) | (112.0) | (112.1)
Preferred dividends paid by subsidiaries | (0.6) | (3.3) | (3.3)
Capital contributions from parent | 0 | 90.0 | 25.0
Repayment of capital to parent | 0 | 0 | 0
Payments to redeem cumulative preferred stock | (61.0) | 0 | 0
Proceeds from issuance of long-term debt | 0 | 250.0 | 0
Net change in commercial paper | 97.1 | 60.9 | (21.7)
Other | (6.8) | (4.8) | (8.7)
Net cash flows from (used for) financing activities | (87.6) | 280.8 | (120.8)
Net increase (decrease) in cash and cash equivalents | (0.2) | (2.0) | 2.6
Cash and cash equivalents at beginning of period | 0.7 | 2.7 | 0.1
Cash and cash equivalents at end of period | 0.5 | 0.7 | 2.7
Supplemental cash flows information: |  |  |
Interest, net of capitalized interest | 85.0 | 79.5 | 79.9
Income taxes, net of refunds | 22.9 | (3.3) | (51.3)
Significant non-cash investing and financing activities: |  |  |
Accrued capital expenditures | $ 37.7 | $ 39.5 | $ 19.7

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- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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