accretion expense

Liabilities2

1. 410-20Asset Retirement Obligations410 Asset Retirement and Environmental Obligations

   ASC 410-20 governs legal obligations associated with the retirement of tangible long-lived assets that arise from acquisition, construction, development, and/or normal operation of the asset, including environmental remediation resulting from normal operations. An entity recognizes the fair value of the ARO liability in the period incurred if fair value can be reasonably estimated, and simultaneously capitalizes an equal asset retirement cost in the carrying amount of the related long-lived asset (410-20-25-4; 410-20-25-5). Fair value is normally measured with an expected present value technique discounted at a credit-adjusted risk-free rate, with later changes recognized as accretion expense and as revisions to estimated cash flows (410-20-30-1; 410-20-35-3).

2. 420-10Overall420 Exit or Disposal Cost Obligations

   ASC 420-10 governs when and how an entity recognizes and measures liabilities for costs of exit or disposal activities (restructurings), including one-time involuntary employee termination benefits, costs to terminate non-lease contracts, and other associated costs such as facility closures and employee relocation. The core rule is that a liability is recognized only when it is incurred — i.e., when a present obligation exists — and measured initially at fair value; a mere commitment to an exit or disposal plan is not the requisite past event (420-10-25-1 through 25-2, 420-10-30-1). Ongoing termination-benefit arrangements, pension/OPEB special termination benefits, deferred compensation, stock compensation, and asset retirement obligations are excluded and handled under other Topics (420-10-15-5 through 15-6).