Long-Term Debt	3 Months Ended
Mar. 31, 2018
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt In March 2018, we took delivery of Symphony of the Seas. We had previously entered into a financing arrangement for the United States dollar financing of this ship in January 2015. Through the financing arrangement, we had the right, but not the obligation, to satisfy the obligations to be incurred upon delivery and acceptance of the vessel under the shipbuilding contract by assuming through a novation agreement, at delivery and acceptance, the debt indirectly incurred by the shipbuilder during the construction of the ship. We borrowed a total of $1.2 billion under our previously committed unsecured term loan, which includes the execution of the novation to satisfy a portion of our final obligation under our shipbuilding agreement. The loan amortizes semi-annually over 12 years and bears interest at a fixed rate of 3.82%. In our consolidated statement of cash flows for the quarter ended March 31, 2018, the acceptance of the ship and satisfaction of our obligation under the shipbuilding contract was classified as an outflow and constructive disbursement within Investing Activities while the amounts novated and effectively advanced from our lender under our previously committed unsecured term loan were classified as an inflow and constructive receipt within Financing Activities. In March 2018, we entered into and drew in full on a credit agreement in the amount of $130.0 million due January 2023. The loan accrues interest at a floating rate of LIBOR plus an applicable margin. The applicable margin varies with our debt rating and was 1.32% as of March 31, 2018. Amounts from the issuance of this loan were used for capital expenditures.

Long-Term Debt

In March 2018, we took delivery of Symphony of the Seas. We had previously entered into a financing arrangement for the United States dollar financing of this ship in January 2015. Through the financing arrangement, we had the right, but not the obligation, to satisfy the obligations to be incurred upon delivery and acceptance of the vessel under the shipbuilding contract by assuming through a novation agreement, at delivery and acceptance, the debt indirectly incurred by the shipbuilder during the construction of the ship. We borrowed a total of $1.2 billion under our previously committed unsecured term loan, which includes the execution of the novation to satisfy a portion of our final obligation under our shipbuilding agreement. The loan amortizes semi-annually over 12 years and bears interest at a fixed rate of 3.82%. In our consolidated statement of cash flows for the quarter ended March 31, 2018, the acceptance of the ship and satisfaction of our obligation under the shipbuilding contract was classified as an outflow and constructive disbursement within Investing Activities while the amounts novated and effectively advanced from our lender under our previously committed unsecured term loan were classified as an inflow and constructive receipt within Financing Activities.

In March 2018, we entered into and drew in full on a credit agreement in the amount of $130.0 million due January 2023. The loan accrues interest at a floating rate of LIBOR plus an applicable margin. The applicable margin varies with our debt rating and was 1.32% as of March 31, 2018. Amounts from the issuance of this loan were used for capital expenditures.