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v3.22.0.1

Consolidated Statements Of Income - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Revenues: |  |  |
Electric utility | $ 3,081 | $ 2,920 | $ 3,064
Gas utility | 456 | 373 | 455
Other utility | 49 | 49 | 46
Non-utility | 83 | 74 | 83
Total revenues | 3,669 | 3,416 | 3,648
Operating expenses: |  |  |
Electric production fuel and purchased power | 642 | 652 | 777
Electric transmission service | 537 | 449 | 481
Cost of gas sold | 258 | 182 | 222
Other operation and maintenance | 676 | 670 | 712
Depreciation and amortization | 657 | 615 | 567
Taxes other than income taxes | 104 | 108 | 111
Total operating expenses | 2,874 | 2,676 | 2,870
Operating income (loss) | 795 | 740 | 778
Other (income) and deductions: |  |  |
Interest expense | 277 | 275 | 273
Equity income from unconsolidated investments, net | (62) | (61) | (53)
Allowance for funds used during construction | (25) | (55) | (93)
Other | 5 | 14 | 15
Total other (income) and deductions | 195 | 173 | 142
Income before income taxes | 600 | 567 | 636
Income tax expense (benefit) | (74) | (57) | 69
Net income | 674 | 624 | 567
Preferred dividend requirements of Interstate Power and Light Company | 15 | 10 | 10
Net income attributable to common shareowners | $ 659 | $ 614 | $ 557
Weighted average number of common shares outstanding: |  |  |
Basic (in shares) | 250.2 | 248.4 | 238.5
Diluted (in shares) | 250.7 | 248.7 | 239.0
Earnings per weighted average common share attributable to Alliant Energy common shareowners: |  |  |
Basic (in dollars per share) | $ 2.63 | $ 2.47 | $ 2.34
Diluted (in dollars per share) | $ 2.63 | $ 2.47 | $ 2.33
IPL [Member] |  |  |
Revenues: |  |  |
Electric utility | $ 1,752 | $ 1,695 | $ 1,781
Gas utility | 265 | 208 | 264
Other utility | 46 | 44 | 44
Total revenues | 2,063 | 1,947 | 2,089
Operating expenses: |  |  |
Electric production fuel and purchased power | 295 | 352 | 435
Electric transmission service | 367 | 298 | 340
Cost of gas sold | 149 | 99 | 120
Other operation and maintenance | 362 | 375 | 404
Depreciation and amortization | 375 | 356 | 327
Taxes other than income taxes | 55 | 57 | 60
Total operating expenses | 1,603 | 1,537 | 1,686
Operating income (loss) | 460 | 410 | 403
Other (income) and deductions: |  |  |
Interest expense | 139 | 139 | 127
Allowance for funds used during construction | (9) | (24) | (50)
Other | 1 | 8 | 8
Total other (income) and deductions | 131 | 123 | 85
Income before income taxes | 329 | 287 | 318
Income tax expense (benefit) | (36) | (47) | 24
Net income | 365 | 334 | 294
Preferred dividend requirements of Interstate Power and Light Company | 15 | 10 | 10
Net income attributable to common shareowners | 350 | 324 | 284
WPL [Member] |  |  |
Revenues: |  |  |
Electric utility | 1,329 | 1,225 | 1,283
Gas utility | 191 | 165 | 191
Other utility | 3 | 5 | 2
Total revenues | 1,523 | 1,395 | 1,476
Operating expenses: |  |  |
Electric production fuel and purchased power | 347 | 300 | 342
Electric transmission service | 170 | 151 | 141
Cost of gas sold | 109 | 83 | 102
Other operation and maintenance | 268 | 254 | 261
Depreciation and amortization | 276 | 254 | 236
Taxes other than income taxes | 45 | 47 | 47
Total operating expenses | 1,215 | 1,089 | 1,129
Operating income (loss) | 308 | 306 | 347
Other (income) and deductions: |  |  |
Interest expense | 105 | 104 | 102
Allowance for funds used during construction | (16) | (31) | (43)
Other | 2 | 3 | 6
Total other (income) and deductions | 91 | 76 | 65
Income before income taxes | 217 | 230 | 282
Income tax expense (benefit) | (51) | (19) | 49
Net income | $ 268 | $ 249 | $ 233

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