Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 28, 2012
Significant Accounting Policies [Line Items]
Licensing fees from MVW after spin-off	$ 60,000,000us-gaap_LicensesRevenue	$ 61,000,000us-gaap_LicensesRevenue	$ 61,000,000us-gaap_LicensesRevenue
Liability for guest loyalty program	2,334,000,000mar_CustomerLoyaltyProgramLiability	2,141,000,000mar_CustomerLoyaltyProgramLiability
Reduction in estimate of breakage	10.00%
Increase in liability for guest loyalty program, contingent upon reduction in the estimate of breakage	142,000,000
Gains (losses) from foreign currency transactions	16,000,000	5,000,000	3,000,000
Gains and other income	0	0	1,000,000
Accounts receivable reserve	33,000,000	43,000,000
Goodwill impairment charge	0us-gaap_GoodwillImpairmentLoss	0us-gaap_GoodwillImpairmentLoss	0us-gaap_GoodwillImpairmentLoss
Fair value of goodwill as a percent of carrying value, trigger for impairment loss	10.00%
Discount rate	2.00%
Self-insurance reserves	4,000,000	5,000,000
Deferred Profit Sharing
Significant Accounting Policies [Line Items]
Compensation costs from profit sharing	$ 76,000,000	$ 75,000,000	$ 69,000,000

The company's future redemption obligation for its frequent guest loyalty program.

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Customer Loyalty Program Liability, Effect of Change In Estimate Of Breakage, Amount

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Customer Loyalty Program Liability, Reduction in Estimate of Breakage, Percentage

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Fair Value of Goodwill as Percent of Carrying Value, Trigger for Impairment Loss

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Liability for Unpaid Insurance Claims and Claims Adjustment Expense, Gross

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Self Insurance Projected Settlement Discount Rate

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- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity.

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Amounts reclassified from other comprehensive income to earnings during the period related to translation from functional currency to reporting currency, as a result of the sale or complete or substantially complete liquidation of an investment in a foreign entity. Net of tax effect.

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