Notes Receivable - Principal Payments (Net of Reserves and Unamortized Discounts) and Interest Rates (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Receivables [Abstract]
2016	$ 5
2017	3
2018	62
2019	5
2020	6
Thereafter	153
Senior, mezzanine, and other loans	$ 234	$ 221
Weighted average interest rate at June 30, 2016	7.70%
Range of stated interest rates at June 30, 2016, minimum	0.00%
Range of stated interest rates at June 30, 2016, maximum	18.00%

Notes Receivable, Future Principal Payments Receivable, After Year Five

No definition available.

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- Definition

Notes Receivable, Future Principal Payments Receivable, Current

+ References

No definition available.

+ Details

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- Definition

Notes Receivable, Future Principal Payments Receivable, in Five Years

+ References

No definition available.

+ Details

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- Definition

Notes Receivable, Future Principal Payments Receivable, in Four Years

+ References

No definition available.

+ Details

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- Definition

Notes Receivable, Future Principal Payments Receivable, in Three Years

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Notes Receivable, Future Principal Payments Receivable, in Two Years

+ References

No definition available.

+ Details

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- Definition

Upper limit of range of stated interest rates for total notes receivable as of the balance sheet date indicated.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Lower limit of range of stated interest rates for total notes receivable as of the balance sheet date indicated.

+ References

No definition available.

+ Details

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- Definition

Weighted average interest rate for total notes receivable as of the balance sheet date indicated.

+ References

No definition available.

+ Details

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Namespace Prefix:	mar_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

+ 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 210.5-02.3)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Period Type:	instant

- References

No definition available.

+ Details

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