Asset Impairments and Unusual Items	9 Months Ended
Sep. 30, 2019
Asset Impairments and Unusual Items
Asset Impairments and Unusual Items	10. Asset Impairments and Unusual Items (Gain) Loss from Divestitures, Asset Impairments and Unusual Items, Net During the nine months ended September 30, 2018, we recognized a net gain of $14 million, primarily related to net gains from divestitures of $43 million from the sale of certain ancillary operations, which were partially offset by a $29 million charge, during the third quarter of 2018, to impair a landfill in our Tier 3 segment based on an internally developed discounted projected cash flow analysis, taking into account continued volume decreases and revised capping cost estimates. Other, Net During the first quarter of 2019, we recognized a $52 million impairment charge related to our minority-owned investment in a waste conversion technology business. We wrote down our investment to its estimated fair value as the result of recent third-party investor’s transactions in these securities. The fair value of our investment was not readily determinable; thus, we determined the fair value utilizing a combination of quoted price inputs for the equity in our investment (Level 2) and certain management assumptions pertaining to investment value (Level 3).

Asset Impairments and Unusual Items

9 Months Ended

Sep. 30, 2019

10. Asset Impairments and Unusual Items

(Gain) Loss from Divestitures, Asset Impairments and Unusual Items, Net

During the nine months ended September 30, 2018, we recognized a net gain of $14 million, primarily related to net gains from divestitures of $43 million from the sale of certain ancillary operations, which were partially offset by a $29 million charge, during the third quarter of 2018, to impair a landfill in our Tier 3 segment based on an internally developed discounted projected cash flow analysis, taking into account continued volume decreases and revised capping cost estimates.

Other, Net

During the first quarter of 2019, we recognized a $52 million impairment charge related to our minority-owned investment in a waste conversion technology business. We wrote down our investment to its estimated fair value as the result of recent third-party investor’s transactions in these securities. The fair value of our investment was not readily determinable; thus, we determined the fair value utilizing a combination of quoted price inputs for the equity in our investment (Level 2) and certain management assumptions pertaining to investment value (Level 3).