Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Significant Accounting Policies

Useful Lives of Property and Equipment Used in Computation of Depreciation

	Years
Ships	30
Ship improvements	3-20
Buildings and improvements	10-40
Computer hardware and software	3-5
Transportation equipment and other	3-30
Leasehold improvements	Shorter of remaining lease term or useful life 3-30

Passenger Ticket Revenues Attributed to Geographic Areas Based on Where Reservation Originates

	2012			2011			2010
Passenger ticket revenues:
United States		51	%		51	%		55	%
All other countries		49	%		49	%		45	%