Letters of Credit. As of December 31, 2016, we had \$69 million of irrevocable standby letters of credit outstanding, of which \$1 million were under our revolving credit facility. As of December 31, 2015, we had \$63 million of irrevocable standby letters of credit outstanding, of which \$1 million were under our revolving credit facility. Such letters of credit issued during 2016 and 2015 primarily supported the securitization of vacation ownership contract receivables fundings, certain insurance policies and development activity at our vacation ownership business.

Surety Bonds. As of December 31, 2016, we had assembled commitments from 12 surety providers in the amount of \$1.3 billion, of which \$488 million was outstanding (See Note 17- Commitments and Contingencies).

# CRITICAL ACCOUNTING POLICIES

In presenting our financial statements in conformity with generally accepted accounting principles, we are required to make estimates and assumptions that affect the amounts reported therein. Several of the estimates and assumptions we are required to make relate to matters that are inherently uncertain as they pertain to future events. However, events that are outside of our control cannot be predicted and, as such, they cannot be contemplated in evaluating such estimates and assumptions. If there is a significant unfavorable change to current conditions, it could result in a material impact to our consolidated results of operations, financial position and liquidity. We believe that the estimates and assumptions we used when preparing our financial statements were the most appropriate at that time. Presented below are those accounting policies that we believe require subjective and complex judgments that could potentially affect reported results. However, the majority of our businesses operate in environments where we are paid a fee for a service performed, and therefore the results of the majority of our recurring operations are recorded in our financial statements using accounting policies that are not particularly subjective, nor complex.

Vacation Ownership Revenue Recognition. Our sales of VOIs are either cash sales or seller-financed sales. In order for us to recognize revenues of VOI sales under the full accrual method of accounting, as prescribed in the guidance for sales of real estate for fully constructed inventory, a binding sales contract must have been executed, the statutory rescission period must have expired (after which time the purchasers are not entitled to a refund except for non-delivery by us), receivables must have been deemed collectible and the remainder of our obligations must have been substantially completed. In addition, before we recognize any revenues on VOI sales, the purchaser of the VOI must have met the initial investment criteria and, as applicable, the continuing investment criteria, by executing a legally binding financing contract. A purchaser has met the initial investment criteria when a minimum down payment of 10% is received by us. In accordance with the requirements of the guidance for real estate time-sharing transactions, we must also take into consideration the fair value of certain incentives provided to the purchaser when assessing the adequacy of the purchaser’s initial investment. In those cases where financing is provided to the purchaser by us, the purchaser is obligated to remit monthly payments under financing contracts that represent the purchaser’s continuing investment. The contractual terms of seller-provided financing arrangements require that the contractual level of annual principal payments be sufficient to amortize the loan over a customary period for the VOI being financed, which is generally ten years, and payments under the financing contracts begin within 45 days of the sale and receipt of the minimum down payment of 10%.

Allowance for Loan Losses. In our Vacation Ownership segment, we provide for estimated vacation ownership contract receivable defaults at the time of VOI sales by recording a provision for loan losses as a reduction of VOI sales on the Consolidated Statements of Income. We assess the adequacy of the allowance for loan losses based on the historical performance of similar vacation ownership contract receivables. We use a technique referred to as static pool analysis, which tracks defaults for each year’s sales over the entire life of those contract receivables. We consider current defaults, past due aging, historical write-offs of contracts and consumer credit scores (FICO scores) in the assessment of borrower’s credit strength, down payment amount and expected loan performance. We also consider whether the historical economic conditions are comparable to current economic conditions. If current conditions differ from the conditions in effect when the historical experience was generated, we adjust the allowance for loan losses to reflect the expected effects of the current environment on the collectability of our vacation ownership contract receivables.

Impairment of Long-Lived Assets. With regard to the goodwill and other indefinite-lived intangible assets recorded in connection with business combinations, we annually (during the fourth quarter of each year subsequent to completing our annual forecasting process), or more frequently if circumstances indicate that the value of goodwill may be impaired, review the reporting units’ carrying values as required by the guidance for goodwill and other intangible assets. This is done either by performing a qualitative assessment or utilizing the two-step process, with an impairment being recognized only where the fair value is less than carrying value. In any given year we can elect to perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is in excess of its carrying value. If it is not more likely than not that the fair value is in excess of the carrying value, or we elect to bypass the qualitative assessment, we would utilize the two-step process. The qualitative factors evaluated include macroeconomic conditions, industry and market considerations, cost factors, overall financial performance, our historical share price as well as other industry specific considerations. We performed a