ILLINOIS POWER CO

Q: Sep 30 2010

Q: Jun 30 2010

Q: Mar 31 2010

FY: Dec 31 2009

Q: Sep 30 2009

Q: Jun 30 2009

Q: Mar 31 2009

FY: Dec 31 2008

Q: Sep 30 2008

Q: Jun 30 2008

Q: Mar 31 2008

FY: Dec 31 2007

Q: Sep 30 2007

Q: Jun 30 2007

Q: Mar 31 2007

FY: Dec 31 2006

Q: Sep 30 2006

Q: Jun 30 2006

Q: Mar 31 2006

FY: Dec 31 2005

1.01,1.02,2.03,9.01

5.07

8.01,9.01

Submission of Matters to a Vote of Security Holders

Other Events

1.01,9.01

8.01,9.01

8.01

1.01,1.02,2.03

8.01,9.01

2.03,9.01

2.02,8.01

8.01

8.01

5.03,9.01

2.03,8.01,9.01

Other Events

Entry into a Material Definitive Agreement

Financial Statements and Exhibits

8.01,9.01

Certification of termination of registration of a class of securities (Section 12(b))

No description available

Post-effective amendment to a registration statement

Notice of Effectiveness

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Automatic Shelf Registration

Notice of Effectiveness

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933

Notice of Effectiveness

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933

Definitive Proxy Statement

No description available

No description available

Preliminary Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

No description available

No description available

No description available

No description available

No description available

No description available

Prebil William J

WHITELEY DAVID A

BAXTER WARNER L

BIRDSONG JERRE E

CISEL SCOTT A

COLE DANIEL F

LYONS MARTIN J

NELSON GREGORY L

RAINWATER GARY L

Schukar Shawn E

VOSS THOMAS R

Weisenborn Dennis W

SULLIVAN STEVEN R

DYNEGY INC /IL/

ILLINOVA CORP

ILLINOVA CORP

ILLINOVA CORP

ILLINOVA CORP

ILLINOVA CORP

ILLINOIS POWER CO

Post-effective amendment to an automatic shelf registration statement

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Notification of the removal from listing and registration of matured redeemed or retired securities

Notification of the removal from listing and registration of matured redeemed or retired securities

Notification of the removal from listing and registration of matured redeemed or retired securities

Notification of the removal from listing and registration of matured redeemed or retired securities

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Definitive information statement

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)