Asset Sales, Impairments, and Other Accruals (Tables)

12 Months Ended

Dec. 31, 2010

Asset Sales, Impairments and Other Accruals (Tables) [Abstract]

Asset Sales, Impairments and Other Accruals

	Years Ended December 31,
	2010			2009			2008
	(Millions)
Williams Partners
Involuntary conversion gains	$	(18	)	$	(4	)	$	(17	)
Gains on sales of certain assets		(12	)		(40	)		(10	)
Accrual of regulatory liability related to overcollection of certain employee expenses		10			—			—
Impairments of certain gathering and transportation assets		9			—			6
Exploration & Production
Gain on sale of contractual right to an international production payment		—			—			(148	)
Impairment of goodwill		1,003			—			—
Impairments of producing properties and acquired unproved reserves		678			15			—
Penalties from early release of drilling rigs		—			32			—
Midstream Canada & Olefins
Gulf Liquids litigation contingency accrual reversal (see Note 16)		—			—			(32	)