The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4313-108586

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586

Name:	us-gaap_ConversionOfStockSharesIssued1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Related Party Disclosures (Details) - USD ($) $ in Millions		1 Months Ended
Related Party Disclosures (Details) - USD ($) $ in Millions	May 28, 2020	Mar. 31, 2021	Jun. 30, 2021
Related Party Transaction [Line Items]
Repayment and extinguishment of debt, amount		$ 1,500
Private Exchangeable Notes
Related Party Transaction [Line Items]
Repayment and extinguishment of debt, amount		$ 1,000
NCLC \| Private Exchangeable Notes \| Maximum
Related Party Transaction [Line Items]
Shares issuable upon exchange	46,577,947
L Catterton [Member]
Related Party Transaction [Line Items]
Beneficial ownership percentage			10.00%
L Catterton [Member] \| Minimum
Related Party Transaction [Line Items]
Investor ownership threshold	50.00%