Asset Impairments

12 Months Ended

Dec. 31, 2016

5.	Asset Impairments

The following table presents the asset impairments recognized in 2016, 2015 and 2014.

	Year Ended December 31,
	2016		2015		2014
	(Millions)
U.S. oil and gas assets	$	2,809	$	17,992	$	—
Canada oil and gas assets		1,291		1,257		—
Canada goodwill		—		—		1,941
EnLink goodwill		873		1,328		—
EnLink other intangible assets		—		223		—
Other assets		2		20		12
Total asset impairments	$	4,975	$	20,820	$	1,953

Oil and Gas Impairments

Under the full cost method of accounting, capitalized costs of oil and gas properties are subject to a quarterly full cost ceiling test, which is discussed in Note 1.

The oil and gas impairments resulted from declines in the U.S. and Canada full cost ceilings. The lower ceiling values resulted primarily from significant decreases in the 12-month average trailing prices for oil, bitumen, natural gas and NGLs, which significantly reduced proved reserves values and, to a lesser degree, proved reserves. For further information, see Note 22.

Goodwill and Other Intangible Assets Impairments

In 2016 and 2015, Devon recognized goodwill and other intangible assets impairments related to EnLink’s business. Additional information regarding the impairments is discussed in Note 12.

In 2014, as a result of its annual impairment test of goodwill, Devon concluded the implied fair value of its Canadian goodwill was zero and wrote off the remaining goodwill.