Goodwill and Intangibles (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The carrying amount of goodwill was as follows:

	Millions of Dollars
	Midstream		Refining		Marketing and Specialties	Total
Balance at January 1, 2014	$	518	1,919		659	3,096
Tax and other adjustments	—		(49	)	52	3
Goodwill assigned to asset acquisitions	105		—		127	232
Goodwill allocated to assets held-for-sale or sold	—		(57	)	—	(57	)
Balance at December 31, 2014	623		1,813		838	3,274
Goodwill assigned to asset acquisitions	—		—		1	1
Balance at December 31, 2015	$	623	1,813		839	3,275

Schedule of Changes in Carrying Value of Intangible Assets

Information relating to the carrying value of intangible assets at December 31 follows:

	Millions of Dollars
	Gross Carrying Amount
	2015		2014
Indefinite-Lived Intangible Assets
Trade names and trademarks	$	503	503
Refinery air and operating permits	266		239
Other	1		14
	$	770	756