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Filing Detail
Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001193125-12-081622
Filing Date
2012-02-27
Accepted
2012-02-27 16:20:49
Documents
35
Period of Report
2011-12-31

Document Format Files

Seq Description Document Type Size
1 FORM 10-K d258440d10k.htm 10-K 6284791
2 EX-10.4C d258440dex104c.htm EX-10.4C 58192
3 EX-10.4E d258440dex104e.htm EX-10.4E 51737
4 EX-10.4G d258440dex104g.htm EX-10.4G 38119
5 EX-10.5C d258440dex105c.htm EX-10.5C 31950
6 EX-10.5D d258440dex105d.htm EX-10.5D 45904
7 EX-10.5E d258440dex105e.htm EX-10.5E 52390
8 EX-10.17 d258440dex1017.htm EX-10.17 6327
9 EX-12.1 d258440dex121.htm EX-12.1 42030
10 EX-12.2 d258440dex122.htm EX-12.2 40648
11 EX-12.3 d258440dex123.htm EX-12.3 42338
12 EX-21.1 d258440dex211.htm EX-21.1 2706
13 EX-21.2 d258440dex212.htm EX-21.2 2763
14 EX-23.1 d258440dex231.htm EX-23.1 2044
15 EX-23.2 d258440dex232.htm EX-23.2 1807
16 EX-23.3 d258440dex233.htm EX-23.3 1807
17 EX-23.4 d258440dex234.htm EX-23.4 1780
18 EX-31.1 d258440dex311.htm EX-31.1 9447
19 EX-31.2 d258440dex312.htm EX-31.2 9456
20 EX-31.3 d258440dex313.htm EX-31.3 9463
21 EX-31.4 d258440dex314.htm EX-31.4 9472
22 EX-31.5 d258440dex315.htm EX-31.5 9461
23 EX-31.6 d258440dex316.htm EX-31.6 9470
24 EX-32.1 d258440dex321.htm EX-32.1 2716
25 EX-32.2 d258440dex322.htm EX-32.2 2724
26 EX-32.3 d258440dex323.htm EX-32.3 2724
27 EX-99.1 d258440dex991.htm EX-99.1 425458
34 PDF ATTACHMENT d258440d10k1.pdf 10-K 1398143
35 GRAPHIC g258440g58c32.jpg GRAPHIC 6136
  Complete submission text file 0001193125-12-081622.txt   74881464

Data Files

Seq Description Document Type Size
28 XBRL INSTANCE DOCUMENT lnt-20111231.xml EX-101.INS 20033554
29 XBRL TAXONOMY EXTENSION SCHEMA lnt-20111231.xsd EX-101.SCH 203362
30 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE lnt-20111231_cal.xml EX-101.CAL 119278
31 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE lnt-20111231_def.xml EX-101.DEF 1075898
32 XBRL TAXONOMY EXTENSION LABEL LINKBASE lnt-20111231_lab.xml EX-101.LAB 1258151
33 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE lnt-20111231_pre.xml EX-101.PRE 1429283
Mailing Address 200 FIRST ST SE ALLIANT ENERGY TOWER CEDAR RAPIDS IA 52401
Business Address 200 FIRST ST SE ALLIANT ENERGY TOWER CEDAR RAPIDS IA 52401 3193984411
INTERSTATE POWER & LIGHT CO (Filer) CIK: 0000052485 (see all company filings)

IRS No.: 420331370 | State of Incorp.: IA | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-04117 | Film No.: 12642207
SIC: 4931 Electric & Other Services Combined

Mailing Address 4902 N BILTMORE LANE SUITE 1000 MADISON WI 53718-2148
Business Address 4902 NORTH BILTMORE LANE SUITE 1000 MADISON WI 53718-2148 608-458-3311
WISCONSIN POWER & LIGHT CO (Filer) CIK: 0000107832 (see all company filings)

IRS No.: 390714890 | State of Incorp.: WI | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 000-00337 | Film No.: 12642206
SIC: 4931 Electric & Other Services Combined

Mailing Address 4902 NORTH BILTMORE LANE SUITE 1000 MADISON WI 53718-2148
Business Address 4902 NORTH BILTMORE LANE SUITE 1000 MADISON WI 53718-2148 608-458-3311
ALLIANT ENERGY CORP (Filer) CIK: 0000352541 (see all company filings)

IRS No.: 391380265 | State of Incorp.: WI | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-09894 | Film No.: 12642205
SIC: 4931 Electric & Other Services Combined