Other Income and Expenses (Tables)

9 Months Ended

Sep. 30, 2017

Other Income and Expenses [Abstract]

Other Income and Expenses [Table Text Block]

The following table presents certain gains or losses reflected in Other (income) expense – net within Costs and expenses in our Consolidated Statement of Operations:

	Three Months Ended   September 30,				Nine Months Ended   September 30,
	2017		2016		2017			2016
	(Millions)
Williams Partners
Amortization of regulatory assets associated with asset retirement obligations	$	8	$	8	$	25		$	25
Accrual of regulatory liability related to overcollection of certain employee expenses	5		6		16			19
Project development costs related to Constitution (see Note 2)	4		11		12			19
Gains on contract settlements and terminations	—		—		(15		)	—
Gain on sale of Refinery Grade Propylene Splitter	—		—		(12		)	—
Net foreign currency exchange (gains) losses (1)	—		—		—			11
Loss on sale of Canadian operations (see Note 3)	4		32		—			32
Other
Gain on sale of unused pipe	—		—		—			(10		)
Loss on sale of Canadian operations (see Note 3)	—		33		1			33

(1) Primarily relates to gains and losses incurred on foreign currency transactions and the remeasurement of U.S. dollar denominated current assets and liabilities within our former Canadian operations.