General (Details)		3 Months Ended
		Feb. 29, 2020 USD ($)	Feb. 28, 2019 USD ($)	Apr. 01, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 13, 2020 USD ($)	Dec. 01, 2019 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Revenues		$ 4,789,000,000	$ 4,673,000,000
Operating lease right-of-use assets	[1]	1,469,000,000
Operating lease liabilities		1,480,000,000
ASU 2016-02
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Operating lease right-of-use assets							$ 1,400,000,000
Operating lease liabilities							$ 1,400,000,000
Cruise onboard and other
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Revenues		1,556,000,000	1,474,000,000
Cruise onboard and other | Adjustment
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Revenues			29,000,000
Cruise
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Other operating		$ 1,001,000,000	759,000,000
Cruise | Adjustment
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Other operating			$ 29,000,000
Revolving credit facility | Subsequent Event
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Line of credit facility, maximum borrowing capacity					$ 3,000,000,000.0	$ 3,000,000,000.0
EBITDA
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Interest coverage ratio		3
Senior Secured Notes due 2023 | Secured | Subsequent Event
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Debt instrument, face amount				$ 4,000,000,000.0
Senior Secured Notes due 2023, Initial Purchasers Exercise Additional Options | Convertible | Subsequent Event
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Debt instrument, face amount				2,012,500,000.0000
Senior Convertible Notes due 2023 | Convertible | Subsequent Event
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Debt instrument, face amount				1,750,000,000
Debt instrument, convertible, carrying amount				500,000,000
Senior Converted Notes due 2023, Underwriters Exercise Additional Shares | Convertible | Subsequent Event
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Debt instrument, convertible, carrying amount				$ 575,000,000

[1] We adopted the provisions of Leases on December 1, 2019.