Acquisitions Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2013

Business Combinations [Abstract]

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

The following table presents the allocation of the acquisition-date fair value of the major classes of the net assets, which are included in the Williams Partners segment:

	Laser			Caiman
	(Millions)
Assets held-for-sale	$	18		$	—
Other current assets	3			16
Property, plant, and equipment	158			656
Intangible assets:
Customer contracts	316			1,141
Customer relationships	—			250
Other	2			2
Current liabilities	(21		)	(94		)
Noncurrent liabilities	—			(3		)
Identifiable net assets acquired	476			1,968
Goodwill	290			356
	$	766		$	2,324

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The gross carrying amount and accumulated amortization of Other intangible assets at December 31 are as follows:

	2013					2012
	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
	(Millions)
Customer contracts	$	1,493	$	(88	)	$	1,493	$	(38	)
Customer relationships	250		(14		)	250		(6		)
Other	6		(3		)	6		(1		)
Total	$	1,749	$	(105	)	$	1,749	$	(45	)