SCHEDULE 13G

EXHIBIT B

JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)(1)

The undersigned persons agree and consent to the joint filing on their behalf of this Amendment to Schedule 13G in connection with their beneficial ownership of the Common Stock of TXU Corp.

Dated: February 14, 2005	/S/ WARREN E. BUFFETT
	Warren E. Buffett
	BERKSHIRE HATHAWAY INC.
Dated: February 14, 2005	/S/ WARREN E. BUFFETT
	By: Warren E. Buffett
	Title: Chairman of the Board
	OBH, INC.
Dated: February 14, 2005	/S/ WARREN E. BUFFETT
	By: Warren E. Buffett
	Title: Chairman of the Board
	NATIONAL INDEMNITY COMPANY
Dated: February 14, 2005	/S/ WARREN E. BUFFETT
	By: Warren E. Buffett
	Title: Chairman of the Board
	GEICO CORPORATION
Dated: February 14, 2005	/S/ WARREN E. BUFFETT
	By: Warren E. Buffett
	Title: Chairman of the Board
	GOVERNMENT EMPLOYEES INSURANCE COMPANY
Dated: February 14, 2005	/S/ WARREN E. BUFFETT
	By: Warren E. Buffett
	Title: Chairman of the Board
	BERKSHIRE HATHAWAY LIFE INSURANCE OF NEBRASKA
Dated: February 14, 2005	/S/ MARC D. HAMBURG
	By: Marc D. Hamburg
	Title: Treasurer

	CORNHUSKER CASUALTY COMPANY
Dated: February 14, 2005	/S/ RODNEY ELDRED
	By: Rodney Eldred
	Title: President and Chief Executive Officer
	BENJAMIN MOORE PENSION
Dated: February 14, 2005	/S/ YVAN DUPUY
	By: Yvan Dupuy
	Title: President and Chief Executive Officer, Benjamin Moore
	THE BUFFALO NEWS OFFICE PENSION PLAN
Dated: February 14, 2005	/S/ STANFORD LIPSEY
	By: Stanford Lipsey
	Title: President and Chief Executive Officer, The Buffalo News
	THE BUFFALO NEWS EDITORIAL PENSION PLAN
Dated: February 14, 2005	/S/ STANFORD LIPSEY
	By: Stanford Lipsey
	Title: President and Chief Executive Officer, The Buffalo News
	FLIGHTSAFETY INTERNATIONAL INC. RETIREMENT INCOME PLAN
Dated: February 14, 2005	/S/ AL UELTSCHI
	By: Al Ueltschi
	Title: President and Chief Executive Officer, FlightSafety International, Inc.
	FRUIT OF THE LOOM PENSION TRUST
Dated: February 14, 2005	/S/ JOHN HOLLAND
	By: John Holland
	Title: President and Chief Executive Officer, Fruit of the Loom
	GEICO CORPORATION PENSION PLAN TRUST
Dated: February 14, 2005	/S/ LOU SIMPSON
	By: Lou Simpson
	Title: President and Chief Executive Officer, GEICO Corporation

	JOHNS MANVILLE CORPORATION MASTER PENSION TRUST
Dated: February 14, 2005	/S/ JERRY HENRY
	By: Jerry Henry
	Title: President and Chief Executive Officer, Johns Manville Corporation
	JUSTIN BRANDS, INC. UNION PENSION PLAN & JUSTIN BRANDS, INC.
	PENSION PLAN & TRUST
Dated: February 14, 2005	/S/ RANDY WATSON
	By: Randy Watson
	Title: President and Chief Executive Officer, Justin Brands, Inc.
	ACME BRICK COMPANY PENSION TRUST
Dated: February 14, 2005	/S/ HAROLD MELTON
	By: Harold Melton
	Title: President and Chief Executive Officer, Acme Building Brands
	SCOTT FETZER COMPANY COLLECTIVE INVESTMENT TRUST
Dated: February 14, 2005	/S/ KEN SEMELSBERGE
	By: Ken Semelsberge
	Title: President and Chief Executive Officer, Scott Fetzer Companies