Long-Term Debt	6 Months Ended
Jun. 30, 2015
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt In April 2015, we took delivery of Anthem of the Seas. To finance the purchase, we borrowed $742.1 million under a previously committed unsecured term loan which is 95% guaranteed by Euler Hermes Deutschland AG ("Hermes"), the official export credit agency of Germany. The loan amortizes semi-annually over 12 years and bears interest at LIBOR plus a margin of 1.30%, currently totaling 1.71%. During 2012, we entered into forward-starting interest rate swap agreements for $725.0 million of the loan which effectively converted the floating rate available to us per the credit agreement to a fixed rate on this portion of the loan, including the applicable margin, of 3.86% effective April 2015 through the remaining term of the loan. See Note 9. Fair Value Measurements and Derivative Instruments for further information regarding these agreements. In June 2015, we amended and restated our $1.1 billion unsecured revolving credit facility due July 2016. The amendment reduced the applicable margin and facility fee and extended the termination date to June 2020. The applicable margin and facility fee vary with our debt rating and were 1.50% and 0.25%, respectively, as of June 30, 2015. We have the ability to increase the capacity of the amended facility by an additional $300 million, subject to the receipt of additional or increased lender commitments, and to extend the termination date by up to two years, subject to lender consent. Additionally in July 2015, we amended our $1.2 billion unsecured revolving credit facility due August 2018 to reduce pricing in line with the amended pricing of the $1.1 billion unsecured revolving credit facility. These amendments did not result in the extinguishment of debt. In July 2015, we also amended our $380.0 million, €365.0 million, $290.0 million and $65.0 million unsecured term loans due at various dates from 2016 through 2019 to reduce the applicable margins, which is now 1.75% for each loan based on our current debt rating. The termination date of the $290 million unsecured term loan was extended from February 2016 to February 2018. None of these amendments resulted in the extinguishment of debt.

Long-Term Debt

In April 2015, we took delivery of Anthem of the Seas. To finance the purchase, we borrowed $742.1 million under a previously committed unsecured term loan which is 95% guaranteed by Euler Hermes Deutschland AG ("Hermes"), the official export credit agency of Germany. The loan amortizes semi-annually over 12 years and bears interest at LIBOR plus a margin of 1.30%, currently totaling 1.71%. During 2012, we entered into forward-starting interest rate swap agreements for $725.0 million of the loan which effectively converted the floating rate available to us per the credit agreement to a fixed rate on this portion of the loan, including the applicable margin, of 3.86% effective April 2015 through the remaining term of the loan. See Note 9. Fair Value Measurements and Derivative Instruments for further information regarding these agreements.

In June 2015, we amended and restated our $1.1 billion unsecured revolving credit facility due July 2016. The amendment reduced the applicable margin and facility fee and extended the termination date to June 2020. The applicable margin and facility fee vary with our debt rating and were 1.50% and 0.25%, respectively, as of June 30, 2015. We have the ability to increase the capacity of the amended facility by an additional $300 million, subject to the receipt of additional or increased lender commitments, and to extend the termination date by up to two years, subject to lender consent. Additionally in July 2015, we amended our $1.2 billion unsecured revolving credit facility due August 2018 to reduce pricing in line with the amended pricing of the $1.1 billion unsecured revolving credit facility. These amendments did not result in the extinguishment of debt.

In July 2015, we also amended our $380.0 million, €365.0 million, $290.0 million and $65.0 million unsecured term loans due at various dates from 2016 through 2019 to reduce the applicable margins, which is now 1.75% for each loan based on our current debt rating. The termination date of the $290 million unsecured term loan was extended from February 2016 to February 2018. None of these amendments resulted in the extinguishment of debt.