Number of Reportable Business Segments

No definition available.

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- Definition

Percentage Of Selling Expense

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Adjustment to remove restructuring costs and other charges and Timeshare strategy impairment charges, as applicable

+ References

No definition available.

+ Details

Name:	mar_RestructuringCostsOtherChargesTimeshareStrategyImpairmentCharges
Namespace Prefix:	mar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	mar_SegmentReportingDisclosureLineItems
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Data Type:	xbrli:stringItemType
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- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 10

+ Details

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- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 7

-Section 03

-Paragraph 8

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 13

-Subparagraph a

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 12

-Paragraph 5

-Subparagraph b, c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

+ Details

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- Definition

Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 1

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Expenses recognized in the period that are directly related to the selling and distribution of products or services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.4)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

+ Details

Name:	us-gaap_SellingExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Business Segments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	11 Months Ended	12 Months Ended
	Nov. 20, 2011	Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Segment Reporting Disclosure [Line Items]
Number of business segments		4
Revenues		$ 12,317	$ 11,691	$ 10,908
Segment financial results		356	551	(418)
Property and equipment		1,168	1,307
International Operations
Segment Reporting Disclosure [Line Items]
Revenues		1,945	1,841	1,700
Segment financial results		172	252	(26)
Property and equipment		402	350
Asia
Segment Reporting Disclosure [Line Items]
Segment financial results		76
Europe
Segment Reporting Disclosure [Line Items]
Segment financial results		42
Americas Excluding The United States
Segment Reporting Disclosure [Line Items]
Segment financial results		(12)
Middle East And Africa
Segment Reporting Disclosure [Line Items]
Segment financial results		19
Australia
Segment Reporting Disclosure [Line Items]
Segment financial results		3
Ireland and the United Kingdom
Segment Reporting Disclosure [Line Items]
Segment financial results		44
Total Reportable Segments
Segment Reporting Disclosure [Line Items]
Selling expenses		354	419	440
Revenues		12,197	11,611	10,831
Segment financial results		765	983	4
Former Timeshare Segment
Segment Reporting Disclosure [Line Items]
Percentage of selling expense	82.00%		85.00%	86.00%
Revenues		1,438	1,551	1,444
Segment financial results		(217)	126	(674)
Former Timeshare Segment \| International Operations
Segment Reporting Disclosure [Line Items]
Impairment charges and restructuring costs		(86)		(176)
Former Timeshare Segment \| Asia
Segment Reporting Disclosure [Line Items]
Impairment charges and restructuring costs				(22)
Former Timeshare Segment \| Europe
Segment Reporting Disclosure [Line Items]
Impairment charges and restructuring costs		(2)		(47)
Former Timeshare Segment \| Americas Excluding The United States
Segment Reporting Disclosure [Line Items]
Impairment charges and restructuring costs		(84)		(100)
Former Timeshare Segment \| Ireland and the United Kingdom
Segment Reporting Disclosure [Line Items]
Impairment charges and restructuring costs				$ (7)