CVX "records the fair value of a liability for an Asset Retirement Obligation (ARO) as an asset and liability when there is a legal obligation associated with the retirement of a tangible long-lived asset and the liability can be reasonably estimated. Complete this sentence: "AROs are primarily recorded for the company's" As of December 31,2013, the ARO for CVX was valued at $13,271 million. What was the balance of CVX's asset retirement obligation on December 31, 2015? Using your knowledge gained in class: Is the increase in the asset retirement obligation consistent with the lecture notes regarding asset retirement obligations over time