A company completes construction of a $400 million offshore oil platform and places it into service on January 1. State law requires that the platform be dismantled and removed at the end of its useful life, which is estimated to be 10 years. The company estimates that the cost of dismantling the platform will be $20 million. The discounted value of the liability is $9 million using the company's credit-adjusted, risk-free rate. The company has already capitalized the $400 million construction cost of the platform. What amounts should the company record as liability and expense when the asset is placed into service

An asset retirement obligation (ARO) refers to an obligation with respect to the acquisition , construction, development, etc. The liability should be recognized the liability at the present value that should be expected to be paid for settling the obligations

Here the $9,000,000 million represents the liability

Also the journal entry is

Asset Dr

To liability

(Being the asset placed is recorded)

There is no expense should be recorded in the income statement