Impairment	9 Months Ended
Sep. 30, 2017
Asset Impairment Charges [Abstract]
Impairment	3. Impairment In the third quarter of 2017, we recorded a pre-tax impairment charge of $2,503 million ($550 million after income taxes) to impair the carrying value of our interests in Norway based on the anticipated sale of this asset using Level 3 inputs. Upon recognition of the impairment and corresponding tax benefit of $1,953 million, the deferred tax position recognized for Norway on the Consolidated Balance Sheet changed to a non-current deferred tax asset from a net non-current deferred tax liability. See Note 14. Subsequent Events.

Impairment

9 Months Ended

Sep. 30, 2017

3. Impairment

In the third quarter of 2017, we recorded a pre-tax impairment charge of $2,503 million ($550 million after income taxes) to impair the carrying value of our interests in Norway based on the anticipated sale of this asset using Level 3 inputs. Upon recognition of the impairment and corresponding tax benefit of $1,953 million, the deferred tax position recognized for Norway on the Consolidated Balance Sheet changed to a non-current deferred tax asset from a net non-current deferred tax liability. See Note 14. Subsequent Events.