MGM Resorts International (MGM) 10-K 2 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Billions, except Share data, unless otherwise specified	Dec. 31, 2014	Feb. 24, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	MGM
Entity Registrant Name	MGM Resorts International
Entity Central Index Key	789570
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		491,313,258
Entity Public Float			$10.50

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets
Cash and cash equivalents	$1,713,715	$1,803,669
Cash deposits - original maturities longer than 90 days	570,000
Accounts receivable, net	473,345	488,217
Inventories	104,011	107,907
Income tax receivable	14,675
Deferred income taxes, net		80,989
Prepaid expenses and other	151,414	238,657
Total current assets	3,027,160	2,719,439
Property and equipment, net	14,441,542	14,055,212
Other assets
Investments in and advances to unconsolidated affiliates	1,559,034	1,469,261
Goodwill	2,897,110	2,897,442
Other intangible assets, net	4,364,856	4,511,861
Other long-term assets, net	412,809	431,395
Total other assets	9,233,809	9,309,959
Total assets	26,702,511	26,084,610
Current liabilities
Accounts payable	164,252	144,990
Construction payable	170,439	96,202
Income taxes payable		14,813
Deferred income taxes, net	62,142
Current portion of long-term debt	1,245,320
Accrued interest on long-term debt	191,155	188,522
Other accrued liabilities	1,574,617	1,770,801
Total current liabilities	3,407,925	2,215,328
Deferred income taxes, net	2,621,860	2,419,967
Long-term debt	12,913,882	13,447,230
Other long-term obligations	130,570	141,590
Commitments and contingencies (Note 11)
Stockholders' equity
Common stock, $.01 par value: authorized 1,000,000,000 shares, issued and outstanding 491,292,117 and 490,360,628 shares	4,913	4,904
Capital in excess of par value	4,180,922	4,156,680
Retained earnings (accumulated deficit)	-107,909	41,964
Accumulated other comprehensive income	12,991	12,503
Total MGM Resorts International stockholders' equity	4,090,917	4,216,051
Noncontrolling interests	3,537,357	3,644,444
Total stockholders' equity	7,628,274	7,860,495
Total liabilities and stockholders' equity	$26,702,511	$26,084,610

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, authorized shares	1,000,000,000	1,000,000,000
Common stock, issued shares	491,292,117	490,360,628
Common stock, outstanding shares	491,292,117	490,360,628

Consolidated_Statements_Of_Ope

Consolidated Statements Of Operations (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues
Casino	$5,878,775	$5,875,782	$5,319,489
Rooms	1,768,012	1,646,303	1,588,770
Food and beverage	1,558,937	1,469,582	1,472,382
Entertainment	560,116	522,911	483,946
Retail	191,351	194,602	196,938
Other	507,639	490,349	482,547
Reimbursed costs	383,434	364,664	357,597
Total revenues, gross	10,848,264	10,564,193	9,901,669
Less: Promotional allowances	-766,280	-754,530	-740,825
Total revenues, net	10,081,984	9,809,663	9,160,844
Expenses
Casino	3,643,881	3,684,810	3,396,752
Rooms	548,993	516,605	507,856
Food and beverage	908,916	844,431	844,629
Entertainment	422,115	386,252	356,934
Retail	99,455	107,249	112,732
Other	361,904	354,705	344,782
Reimbursed costs	383,434	364,664	357,597
General and administrative	1,318,749	1,278,450	1,239,774
Corporate expense	238,811	216,745	235,007
Preopening and start-up expenses	39,257	13,314	2,127
Property transactions, net	41,002	124,761	696,806
Depreciation and amortization	815,765	849,225	927,697
Total expenses	8,822,282	8,741,211	9,022,693
Income (loss) from unconsolidated affiliates	63,836	68,829	-16,800
Operating income	1,323,538	1,137,281	121,351
Non-operating income (expense)
Interest expense, net of amounts capitalized	-817,061	-857,347	-1,116,358
Non-operating items from unconsolidated affiliates	-87,794	-208,682	-130,845
Other, net	-7,797	-9,062	-608,361
Total non-operating income (expense)	-912,652	-1,075,091	-1,855,564
Income (loss) before income taxes	410,886	62,190	-1,734,213
Benefit (provision) for income taxes	-283,708	-20,816	117,301
Net income (loss)	127,178	41,374	-1,616,912
Less: Net income attributable to noncontrolling interests	-277,051	-213,108	-150,779
Net loss attributable to MGM Resorts International	($149,873)	($171,734)	($1,767,691)
Net loss per share of common stock attributable to MGM Resorts International
Basic	($0.31)	($0.35)	($3.62)
Diluted	($0.31)	($0.35)	($3.62)

Consolidated_Statements_Of_Com

Consolidated Statements Of Comprehensive Income (Loss) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	($287,472)	$50,382	$178,168	$186,100	$22,407	$33,171	($36,401)	$22,197	$127,178	$41,374	($1,616,912)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment									-1,293	-3,993	17,124
Other									1,250	115	-445
Other comprehensive income (loss)									-43	-3,878	16,679
Comprehensive income (loss)									127,135	37,496	-1,600,233
Less: Comprehensive income attributable to noncontrolling interests									-276,520	-211,030	-159,133
Comprehensive loss attributable to MGM Resorts International									($149,385)	($173,534)	($1,759,366)

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities
Net income (loss)	$127,178	$41,374	($1,616,912)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	815,765	849,225	927,697
Amortization of debt discounts, premiums and issuance costs	37,650	35,281	73,389
Loss on retirement of long-term debt		3,801	563,292
Provision for doubtful accounts	46,698	14,969	57,068
Stock-based compensation	37,264	32,332	39,560
Property transactions, net	41,002	124,761	696,806
Loss from unconsolidated affiliates	24,875	140,360	148,301
Distributions from unconsolidated affiliates	15,568	16,928	21,277
Deferred income taxes	331,833	48,470	-117,203
Change in operating assets and liabilities:
Accounts receivable	-32,435	-59,842	1,260
Inventories	3,167	-336	5,183
Income taxes receivable and payable, net	-29,485	13,468	-5,978
Prepaid expenses and other	22,144	-38,790	-4,608
Prepaid Cotai land concession premium	-22,423	-7,917	-56,372
Accounts payable and accrued liabilities	-288,955	116,623	163,270
Other	824	-20,259	13,321
Net cash provided by operating activities	1,130,670	1,310,448	909,351
Cash flows from investing activities
Capital expenditures, net of construction payable	-872,041	-562,124	-422,763
Dispositions of property and equipment	7,651	18,030	426
Investments in and advances to unconsolidated affiliates	-103,040	-28,953	-54,300
Distributions from unconsolidated affiliates in excess of earnings	132	110	1,723
Investments in treasury securities - maturities longer than 90 days	-123,133	-219,546	-285,469
Proceeds from treasury securities - maturities longer than 90 days	210,300	252,592	315,438
Cash deposits - original maturities longer than 90 days	-570,000
Payments for gaming licenses	-85,000	-21,600
Other	10,981	1,354	-1,472
Net cash used in investing activities	-1,524,150	-560,137	-446,417
Cash flows from financing activities
Net borrowings (repayments) under bank credit facilities b maturities of 90 days or less	-28,000	-28,000	1,779,262
Borrowings under bank credit facilities b maturities longer than 90 days	5,171,250	2,793,000	1,350,000
Repayments under bank credit facilities b maturities longer than 90 days	-5,171,250	-2,793,000	-3,634,128
Issuance of senior notes	1,250,750	500,000	4,100,000
Retirement of senior notes, including premiums paid	-508,900	-612,262	-4,009,117
Debt issuance costs	-13,681	-23,576	-160,245
Distributions to noncontrolling interest owners	-386,709	-318,348	-206,806
Other	-5,383	-7,522	-5,925
Net cash provided by (used in) financing activities	308,077	-489,708	-786,959
Effect of exchange rate on cash	-889	-443	1,621
Cash and cash equivalents
Net increase (decrease) for the period	-86,292	260,160	-322,404
Cash related to assets held for sale	-3,662
Balance, beginning of period	1,803,669	1,543,509	1,865,913
Balance, end of period	1,713,715	1,803,669	1,543,509
Supplemental cash flow disclosures
Interest paid, net of amounts capitalized	776,778	840,280	1,039,655
Federal, state and foreign income taxes paid, net of refunds	42,272	835	6,982
Non-cash investing and financing activities
Increase in investment in and advances to CityCenter related to change in completion guarantee liability	83,106	92,956	84,190
Increase in construction accounts payable	$74,237	$39,287	$27,368

Consolidated_Statements_Of_Sto

Consolidated Statements Of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income	Total MGM Resorts International Stockholder's Equity [Member]	Non-Controlling Interests [Member]
In Thousands, except Share data
Beginning Balance at Dec. 31, 2011	$9,882,222	$4,888	$4,094,323	$1,981,389	$5,978	$6,086,578	$3,795,644
Beginning Balance, Shares at Dec. 31, 2011		488,835,000
Net income (loss)	-1,616,912			-1,767,691		-1,767,691	150,779
Currency translation adjustment	17,124				8,770	8,770	8,354
Other comprehensive loss from unconsolidated affiliates, net	-445				-445	-445
Stock-based compensation	43,428		40,566			40,566	2,862
Change in excess tax benefit from stock-based compensation	-301		-301			-301
Issuance of common stock pursuant to stock-based compensation awards	-1,930	4	-1,934			-1,930
Issuance of common stock pursuant to stock-based compensation awards, Shares		399,000
Cash distributions to noncontrolling interest owners	-207,171						-207,171
Other	1		1			1
Ending Balance at Dec. 31, 2012	8,116,016	4,892	4,132,655	213,698	14,303	4,365,548	3,750,468
Ending Balance, Shares at Dec. 31, 2012		489,234,000
Net income (loss)	41,374			-171,734		-171,734	213,108
Currency translation adjustment	-3,993				-1,915	-1,915	-2,078
Other comprehensive loss from unconsolidated affiliates, net	115				115	115
Stock-based compensation	33,422		30,374			30,374	3,048
Change in excess tax benefit from stock-based compensation	4,188		4,188			4,188
Issuance of common stock pursuant to stock-based compensation awards	-8,694	12	-8,706			-8,694
Issuance of common stock pursuant to stock-based compensation awards, Shares		1,127,000
Cash distributions to noncontrolling interest owners	-318,344						-318,344
Other	-3,589		-1,831			-1,831	-1,758
Ending Balance at Dec. 31, 2013	7,860,495	4,904	4,156,680	41,964	12,503	4,216,051	3,644,444
Ending Balance, Shares at Dec. 31, 2013	490,360,628	490,361,000
Net income (loss)	127,178			-149,873		-149,873	277,051
Currency translation adjustment	-1,293				-762	-762	-531
Other comprehensive loss from unconsolidated affiliates, net	1,250				1,250	1,250
Stock-based compensation	38,368		34,102			34,102	4,266
Change in excess tax benefit from stock-based compensation	-7,807		-7,807			-7,807
Issuance of common stock pursuant to stock-based compensation awards	-8,884	9	-8,893			-8,884
Issuance of common stock pursuant to stock-based compensation awards, Shares		931,000
Cash distributions to noncontrolling interest owners	-387,211						-387,211
Other	6,178		6,840			6,840	-662
Ending Balance at Dec. 31, 2014	$7,628,274	$4,913	$4,180,922	($107,909)	$12,991	$4,090,917	$3,537,357
Ending Balance, Shares at Dec. 31, 2014	491,292,117	491,292,000

Organization

Organization	12 Months Ended
	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	NOTE 1 — ORGANIZATION
	Organization.  MGM Resorts International (the “Company”) is a Delaware corporation that acts largely as a holding company and, through wholly owned subsidiaries, owns and/or operates casino resorts. The Company owns and operates the following casino resorts in Las Vegas, Nevada:  Bellagio, MGM Grand Las Vegas, The Mirage, Mandalay Bay, Luxor, New York-New York, Monte Carlo, Excalibur and Circus Circus Las Vegas.  Operations at MGM Grand Las Vegas include management of The Signature at MGM Grand Las Vegas, a condominium-hotel consisting of three towers.  Other Nevada operations include Circus Circus Reno, Gold Strike in Jean and Railroad Pass in Henderson. During 2014, the Company entered into separate agreements to sell Railroad Pass and Gold Strike in Jean, Nevada, as discussed in Note 4.  Along with local investors, the Company owns and operates MGM Grand Detroit in Detroit, Michigan. The Company owns and operates two resorts in Mississippi: Beau Rivage in Biloxi and Gold Strike Tunica.  The Company also owns Shadow Creek, an exclusive world-class golf course located approximately ten miles north of its Las Vegas Strip resorts, Primm Valley Golf Club at the California/Nevada state line and Fallen Oak golf course in Saucier, Mississippi.
	The Company owns 51% and has a controlling interest in MGM China Holdings Limited (“MGM China”), which owns MGM Grand Paradise, S.A. (“MGM Grand Paradise”), the Macau company that owns and operates the MGM Macau resort and casino and the related gaming subconcession and land concession. MGM Grand Paradise has a land concession contract with the government of Macau to develop a second resort and casino on an approximately 18 acre site in Cotai, Macau (“MGM Cotai”). MGM Cotai will be an integrated casino, hotel and entertainment complex and is currently expected to have approximately 1,500 hotel rooms, 500 gaming tables and 1,500 slots.  The total estimated project budget is $2.9 billion excluding development fees eliminated in consolidation, capitalized interest and land related costs.
	The Company owns 50% of CityCenter, located between Bellagio and Monte Carlo. The other 50% of CityCenter is owned by Infinity World Development Corp, a wholly owned subsidiary of Dubai World, a Dubai, United Arab Emirates government decree entity. CityCenter consists of Aria, a casino resort; Mandarin Oriental Las Vegas, a non-gaming boutique hotel; Crystals, a retail, dining and entertainment district; and Vdara, a luxury condominium-hotel. In addition, CityCenter features residential units in the Residences at Mandarin Oriental and Veer.  The Company receives a management fee of 2% of revenues for the management of Aria and Vdara, and 5% of EBITDA (as defined in the agreements governing the Company’s management of Aria and Vdara). In addition, the Company receives an annual fee of $3 million for the management of Crystals.  See Note 6 and Note 17 for additional information related to CityCenter.
	The Company owns 50% of the Borgata Hotel Casino & Spa (“Borgata”) located on Renaissance Pointe in the Marina area of Atlantic City, New Jersey. Boyd Gaming Corporation owns the other 50% of Borgata and also operates the resort. See Note 6 for additional information regarding Borgata.  The Company also has 50% interests in Grand Victoria and Silver Legacy. Grand Victoria is a riverboat casino in Elgin, Illinois; an affiliate of Hyatt Gaming owns the other 50% of Grand Victoria and also operates the resort. Silver Legacy is located in Reno, adjacent to Circus Circus Reno, and the other 50% is owned by Eldorado Resorts, Inc.  See Note 6 for additional information related to Grand Victoria and Silver Legacy.
	The Company has entered into management agreements for future non-gaming hotels, resorts and residential products in the Middle East, North Africa, India and the United States. In 2014, the Company and the Hakkasan Group formed MGM Hakkasan Hospitality (“MGM Hakkasan”), owned 50% by each member, to design, develop and manage luxury non-gaming hotels, resorts and residences under certain brands licensed from the Company and the Hakkasan Group. In October 2014, the Company contributed all of the management agreements for non-gaming hotels, resorts and residential projects (outside of the greater China region) that are currently under development to MGM Hakkasan. The Company will continue to develop and manage properties in the greater China region with Diaoyutai State Guesthouse, including MGM Grand Sanya.
	The Maryland Video Lottery Facility Location Commission has awarded the Company’s subsidiary developing MGM National Harbor the license to build and operate a destination resort casino in Prince George’s County at National Harbor. The expected cost to develop and construct MGM National Harbor is approximately $1.2 billion, excluding capitalized interest and land related costs.  The Company expects the resort to include a casino with approximately 3,600 slots, 160 table games including poker; a 300 suite hotel with luxury spa and rooftop pool; 79,000 square feet of high end branded retail and fine and casual dining; a dedicated 3,000 seat theater venue; 50,000 square feet of meeting and event space; and a 4,700 space parking garage.
	The Company’s subsidiary that will develop MGM Springfield was awarded the Category One casino license in Region B, Western Massachusetts, one of three licensing regions designated by legislation, to build and operate MGM Springfield. MGM Springfield will be developed on 14.5 acres of land between Union and State streets, and Columbus Avenue and Main Street in Springfield, Massachusetts. The Company currently expects the cost to develop and construct MGM Springfield to be approximately $760 million, excluding capitalized interest and land related costs. The Company expects the resort will include a casino with approximately 3,000 slots and 100 table games including poker; 250 hotel rooms; 64,000 square feet of retail and restaurant space; 33,000 square feet of meeting and event space; and a 3,500 space parking garage.
	In 2013, the Company formed Las Vegas Arena Company, LLC with a subsidiary of Anschutz Entertainment Group, Inc. (“AEG”) – a leader in sports, entertainment, and promotions – to design, construct, and operate the Las Vegas Arena which will be located on a parcel of the Company’s land between Frank Sinatra Drive and New York-New York, adjacent to the Las Vegas Strip. The Company and AEG each own 50% of Las Vegas Arena Company. The Las Vegas Arena is anticipated to seat between 18,000 – 20,000 people. Such development is estimated to cost approximately $350 million, excluding capitalized interest and land related costs. See Note 6 for additional information related to Las Vegas Arena Company.
	The Company has two reportable segments: wholly owned domestic resorts and MGM China.  See Note 16 for additional information about the Company’s segments.

Basis_of_Presentation_and_Sign

Basis of Presentation and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	NOTE 2— BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES
	Principles of consolidation.  The consolidated financial statements include the accounts of the Company and its subsidiaries. The Company’s investments in unconsolidated affiliates which are 50% or less owned are accounted for under the equity method.  The Company does not have significant variable interests in variable interest entities.  All intercompany balances and transactions have been eliminated in consolidation.
	In September 2014, the Company resumed accounting for the investment in Borgata under the equity method and has adjusted prior period financial statements retroactively.  See Note 6 for further discussion of our Borgata investment.
	Management’s use of estimates.  The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America.  These principles require the Company’s management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Actual results could differ from those estimates.
	Fair value measurements.  Fair value measurements affect the Company’s accounting and impairment assessments of its long-lived assets, investments in unconsolidated affiliates, cost method investments, assets acquired and liabilities assumed in an acquisition, and goodwill and other intangible assets. Fair value measurements also affect the Company’s accounting for certain of its financial assets and liabilities. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and is measured according to a hierarchy that includes: Level 1 inputs, such as quoted prices in an active market; Level 2 inputs, which are observable inputs for similar assets; or Level 3 inputs, which are unobservable inputs.
	·	The Company uses Level 1 inputs for its long-term debt fair value disclosures. See Note 9; and
	·	The Company used Level 3 inputs when assessing the fair value of its investment in Grand Victoria. See Note 6.
	Cash and cash equivalents.  Cash and cash equivalents include investments and interest bearing instruments with maturities of 90 days or less at the date of acquisition.  Such investments are carried at cost, which approximates market value.  Book overdraft balances resulting from the Company’s cash management program are recorded as accounts payable, construction payable, or other accrued liabilities, as applicable.
	Cash deposits – original maturities longer than 90 days.  At December 31, 2014, the Company had $570 million in certificates of deposit with original maturities longer than 90 days. Scheduled maturities are at or prior to March 31, 2015. The fair value of the certificates of deposit equals their carrying value.
	Accounts receivable and credit risk.  Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of casino accounts receivable.  The Company issues credit to approved casino customers and gaming promoters following background checks and investigations of creditworthiness.  At December 31, 2014, 70% of the Company’s casino receivables were due from customers residing in foreign countries.  Business or economic conditions or other significant events in these countries could affect the collectibility of such receivables.
	Accounts receivable are typically non-interest bearing and are initially recorded at cost.  Accounts are written off when management deems the account to be uncollectible.  Recoveries of accounts previously written off are recorded when received.  An estimated allowance for doubtful accounts is maintained to reduce the Company’s receivables to their net carrying amount, which approximates fair value.  The allowance is estimated based on specific review of customer accounts as well as historical collection experience and current economic and business conditions.  Management believes that as of December 31, 2014, no significant concentrations of credit risk existed for which an allowance had not already been recorded.
	Inventories.  Inventories consist primarily of food and beverage, retail merchandise and operating supplies, and are stated at the lower of cost or market.  Cost is determined primarily using the average cost method for food and beverage and operating supplies.  Cost for retail merchandise is determined using the cost method.
	Property and equipment.  Property and equipment are stated at cost.  A significant amount of the Company’s property and equipment was acquired through business combinations and therefore recognized at fair value at the acquisition date.  Gains or losses on dispositions of property and equipment are included in the determination of income.  Maintenance costs are expensed as incurred.  As of December 31, 2014, the Company had accrued $14 million for property and equipment within accounts payable and $24 million related to construction retention accrued in other long-term liabilities.
	Property and equipment are generally depreciated over the following estimated useful lives on a straight-line basis:
	Buildings and improvements		20 to 40 years
	Land improvements		10 to 20 years
	Furniture and fixtures		3 to 20 years
	Equipment		3 to 20 years
	The Company evaluates its property and equipment and other long-lived assets for impairment based on its classification as held for sale or to be held and used.  Several criteria must be met before an asset is classified as held for sale, including that management with the appropriate authority commits to a plan to sell the asset at a reasonable price in relation to its fair value and is actively seeking a buyer. For assets held for sale, the Company recognizes the asset at the lower of carrying value or fair market value less costs to sell, as estimated based on comparable asset sales, offers received, or a discounted cash flow model.  For assets to be held and used, the Company reviews for impairment whenever indicators of impairment exist.  The Company then compares the estimated future cash flows of the asset, on an undiscounted basis, to the carrying value of the asset.  If the undiscounted cash flows exceed the carrying value, no impairment is indicated.  If the undiscounted cash flows do not exceed the carrying value, then an impairment is recorded based on the fair value of the asset, typically measured using a discounted cash flow model.  If an asset is still under development, future cash flows include remaining construction costs.  All recognized impairment losses, whether for assets held for sale or assets to be held and used, are recorded as operating expenses.  See Note 15 for information on recorded impairment charges.
	Capitalized interest. The interest cost associated with major development and construction projects is capitalized and included in the cost of the project.  When no debt is incurred specifically for a project, interest is capitalized on amounts expended on the project using the weighted-average cost of the Company’s outstanding borrowings.  Capitalization of interest ceases when the project is substantially complete or development activity is suspended for more than a brief period.
	Investments in and advances to unconsolidated affiliates. The Company has investments in unconsolidated affiliates accounted for under the equity method. Under the equity method, carrying value is adjusted for the Company’s share of the investees’ earnings and losses, amortization of certain basis differences, as well as capital contributions to and distributions from these companies. Distributions in excess of equity method earnings are recognized as a return of investment and recorded as investing cash inflows in the accompanying consolidated statements of cash flows. The Company classifies operating income and losses as well as gains and impairments related to its investments in unconsolidated affiliates as a component of operating income or loss, as the Company’s investments in such unconsolidated affiliates are an extension of the Company’s core business operations.
	The Company evaluates its investments in unconsolidated affiliates for impairment whenever events or changes in circumstances indicate that the carrying value of its investment may have experienced an “other-than-temporary” decline in value. If such conditions exist, the Company compares the estimated fair value of the investment to its carrying value to determine if an impairment is indicated and determines whether the impairment is “other-than-temporary” based on its assessment of all relevant factors, including consideration of the Company’s intent and ability to retain its investment. The Company estimates fair value using a discounted cash flow analysis based on estimated future results of the investee and market indicators of terminal year capitalization rates, and a market approach that utilizes business enterprise value multiples based on a range of multiples from the Company’s peer group.  See Note 6 for results of the Company’s review of its investment in certain of its unconsolidated affiliates.
	Special revenue bonds. The Company holds South Jersey Transportation Authority special revenue bonds, the original proceeds from which were used to provide funding for the Atlantic City/Brigantine Connector Project. The repayment of the remaining principal and interest for the bonds is supported by eligible investment alternative tax obligation payments made to the Casino Reinvestment Development Authority from future casino licensees on the Renaissance Pointe land owned by the Company.  The Company assumed no future cash flows will be received to support the carrying value of the bonds, and recorded an other-than-temporary impairment of $47 million as of December 31, 2012, included in “Other, net.” Management believed the probability for casino development on Renaissance Pointe in the foreseeable future was remote due to the continued deterioration of the Atlantic City market and initial underperformance of a resort that opened in the market.
	Goodwill and other intangible assets.  Goodwill represents the excess of purchase price over fair market value of net assets acquired in business combinations.  Goodwill and indefinite-lived intangible assets must be reviewed for impairment at least annually and between annual test dates in certain circumstances. The Company performs its annual impairment tests in the fourth quarter of each fiscal year.  No impairments were indicated as a result of the annual impairment review for goodwill and indefinite-lived intangible assets in 2014, 2013 and 2012.
	Goodwill for relevant reporting units is tested for impairment using a discounted cash flow analysis based on the estimated future results of the Company’s reporting units discounted using market discount rates and market indicators of terminal year capitalization rates, and a market approach that utilizes business enterprise value multiples based on a range of multiples from the Company’s peer group.  The implied fair value of a reporting unit’s goodwill is compared to the carrying value of that goodwill.  The implied fair value of goodwill is determined by allocating the fair value of the reporting unit to its assets and liabilities and the amount remaining, if any, is the implied fair value of goodwill.  If the implied fair value of goodwill is less than its carrying value then it must be written down to its implied fair value.  License rights are tested for impairment using a discounted cash flow approach, and trademarks are tested for impairment using the relief-from-royalty method.  If the fair value of an indefinite-lived intangible asset is less than its carrying amount, an impairment loss must be recognized equal to the difference.
	Revenue recognition and promotional allowances.  Casino revenue is the aggregate net difference between gaming wins and losses, with liabilities recognized for funds deposited by customers before gaming play occurs (“casino front money”) and for chips in the customers’ possession (“outstanding chip liability”). Hotel, food and beverage, entertainment, retail and other operating revenues are recognized as services are performed and goods are provided.  Advance deposits on rooms and advance ticket sales are recorded as accrued liabilities until services are provided to the customer.
	Gaming revenues are recognized net of certain sales incentives, including discounts and points earned in point-loyalty programs.  The retail value of accommodations, food and beverage, and other services furnished to guests without charge is included in gross revenue and then deducted as promotional allowances.  The estimated cost of providing promotional allowances is primarily included in casino expenses as follows:
			Year Ended December 31,
			2014			2013			2012
			(In thousands)
	Rooms		$	115,463		$	111,842		$	109,713
	Food and beverage			295,667			294,555			298,111
	Entertainment, retail and other			39,673			39,606			35,643
			$	450,803		$	446,003		$	443,467
	Gaming promoters. A significant portion of the high-end (“VIP”) gaming volume at MGM Macau is generated through the use of gaming promoters, also known as junket operators. These operators introduce high-end gaming players to MGM Macau, assist these customers with travel arrangements, and extend gaming credit to these players. VIP gaming at MGM Macau is conducted by the use of special purpose nonnegotiable gaming chips. Gaming promoters purchase these nonnegotiable chips from MGM Macau and in turn sell these chips to their players. The nonnegotiable chips allow MGM Macau to track the amount of wagering conducted by each gaming promoters’ clients in order to determine VIP gaming play volume, or rolling chip turnover, which is the amount of nonnegotiable chips wagered and lost. In exchange for the gaming promoters’ services, MGM Macau compensates the gaming promoters through revenue-sharing arrangements or rolling chip turnover-based commissions. The estimated portion of the gaming promoter commissions that represent amounts passed through to VIP customers is recorded as a reduction of casino revenue, and the estimated portion retained by the gaming promoter for its compensation is recorded as casino expense.
	Reimbursed expenses.  The Company recognizes costs reimbursed pursuant to management services as revenue in the period it incurs the costs.  Reimbursed costs related primarily to the Company’s management of CityCenter.
	Loyalty programs.  The Company’s primary loyalty program is “M life” and is available to patrons at substantially all of the Company’s wholly owned and operated resorts and CityCenter. Customers earn points based on their slots play which can be redeemed for FREEPLAY at any of the Company’s participating resorts. The Company records a liability based on the points earned multiplied by the redemption value, less an estimate for points not expected to be redeemed, and records a corresponding reduction in casino revenue. Customers also earn “Express Comps” based on their gaming play which can be redeemed for complimentary goods and services, including hotel rooms, food and beverage, and entertainment. The Company records a liability for the estimated costs of providing goods and services for Express Comps based on the Express Comps earned multiplied by a cost margin, less an estimate for Express Comps not expected to be redeemed and records a corresponding expense in the casino department. MGM Macau also has a loyalty program, whereby patrons earn rewards that can be redeemed for complimentary services, including hotel rooms, food and beverage, and entertainment.
	Advertising.  The Company expenses advertising costs the first time the advertising takes place.  Advertising expense, which is generally included in general and administrative expenses, was $156 million, $153 million and $139 million for 2014, 2013 and 2012, respectively.
	Corporate expense.  Corporate expense represents unallocated payroll, aircraft costs, professional fees and various other expenses not directly related to the Company’s casino resort operations.  In addition, corporate expense includes the costs associated with the Company’s evaluation and pursuit of new business opportunities, which are expensed as incurred.
	Preopening and start-up expenses.  Preopening and start-up costs, including organizational costs, are expensed as incurred.  Costs classified as preopening and start-up expenses include payroll, outside services, advertising, and other expenses related to new or start-up operations.
	Property transactions, net.  The Company classifies transactions such as write-downs and impairments, demolition costs, and normal gains and losses on the sale of assets as “Property transactions, net.”  See Note 15 for a detailed discussion of these amounts.
	Income (loss) per share of common stock.  The table below reconciles basic and diluted income (loss) per share of common stock.  Diluted net loss attributable to MGM Resorts International includes adjustments for the potentially dilutive effect on the Company’s equity interest in MGM China due to shares outstanding under the MGM China Share Option Plan.  Diluted weighted-average common and common equivalent shares includes adjustments for potential dilution of share-based awards outstanding under the Company’s stock compensation plans and the assumed conversion of convertible debt, unless the effect of inclusion of such shares would be antidilutive.
			Year Ended December 31,
			2014			2013			2012
	Numerator:		(In thousands)
	Net loss attributable to MGM Resorts International - basic		$	(149,873	)	$	(171,734	)	$	(1,767,691	)
	Potentially dilutive effect due to MGM China Share Option Plan			(340	)		(104	)		-
	Net loss attributable to MGM Resorts International - diluted		$	(150,213	)	$	(171,838	)	$	(1,767,691	)
	Denominator:
	Weighted-average common shares outstanding - basic and diluted			490,875			489,661			488,988
	Antidilutive share-based awards excluded from the calculation of diluted			19,254			18,468			25,041
	earnings per share
	The $300 million 4.25% senior convertible notes issued in June 2011 and the $1.15 billion 4.25% senior convertible notes issued in April 2010 were excluded from the calculation of diluted earnings per share for the years ended December 31, 2014, 2013 and 2012 as their effect would be antidilutive.
	Currency translation.  The Company translates the financial statements of foreign subsidiaries that are not denominated in U.S. dollars.  Balance sheet accounts are translated at the exchange rate in effect at each balance sheet date.  Income statement accounts are translated at the average rate of exchange prevailing during the period.  Translation adjustments resulting from this process are recorded to other comprehensive income (loss).
	Comprehensive income (loss). Comprehensive income includes net income (loss) and all other non-stockholder changes in equity, or other comprehensive income (loss).  Elements of the Company’s accumulated other comprehensive income are reported in the accompanying consolidated statements of stockholders’ equity, and the cumulative balance of these elements consisted of the following:
			December 31,
			2014			2013
			(In thousands)
	Currency translation adjustments		$	23,440		$	24,733
	Other comprehensive income (loss) from unconsolidated affiliates			672			(578	)
	Accumulated other comprehensive income			24,112			24,155
	Less: Currency translation adjustment attributable to noncontrolling interests			(11,121	)		(11,652	)
	Accumulated other comprehensive income attributable to MGM Resorts		$	12,991		$	12,503
	International
Recently issued accounting standards. During 2014, the Company early adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update No. 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity ”, (“ASU 2014-08”), which is effective for fiscal years, and interim periods within those years, beginning on or after December 15, 2014.  ASU 2014-08 amends the definition of a discontinued operation by requiring discontinued operations treatment for disposals of a component or group of components that represent a strategic shift that has or will have a major impact on an entity’s operations or financial results, and also expands the scope of ASC 205-20 to disposals of equity method investments and acquired businesses held for sale.  Additionally, ASU 2014-08 requires enhanced disclosures about disposal transactions that do not meet the discontinued operations criteria.  Based on application of ASU 2014-08, the Company determined that certain disposals did not qualify as discontinued operations.  See Note 4 for further discussion.
During 2014, the Company implemented FASB Accounting Standards Update No. 2013-11, “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists,” (“ASU 2013-11”), which is effective for fiscal years, and interim periods within those years, beginning on or after December 15, 2013. ASU 2013-11 provides explicit guidance on the financial statement presentation of unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. As a result of implementing ASU 2013-11, the Company recorded a reduction in liability for unrecognized tax benefits and a corresponding reduction in deferred tax assets of $19 million for the year ended December 31, 2014.
In May 2014, the FASB issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers,” (“ASU 2014-09”), which is effective for fiscal years, and interim periods within those years, beginning on or after December 15, 2016. ASU 2014-09 outlines a new, single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. This new revenue recognition model provides a five-step analysis in determining when and how revenue is recognized. Additionally, the new model will require revenue recognition to depict the transfer of promised goods or services to customers in an amount that reflects the consideration a company expects to receive in exchange for those goods or services. The Company is currently assessing the impact that adoption of this new accounting guidance will have on its consolidated financial statements and footnote disclosures.

Accounts_Receivable_Net

Accounts Receivable, Net	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Accounts Receivable, Net	NOTE 3 — ACCOUNTS RECEIVABLE, NET
	Accounts receivable, net consisted of the following:
		December 31,
		2014			2013
		(In thousands)
	Casino	$	307,152		$	309,620
	Hotel		149,268			156,201
	Other		106,527			104,109
			562,947			569,930
	Less: Allowance for doubtful accounts		(89,602	)		(81,713	)
		$	473,345		$	488,217

Assets_Held_For_Sale

Assets Held For Sale	12 Months Ended
	Dec. 31, 2014
Property Plant And Equipment Assets Held For Sale Disclosure [Abstract]
Assets Held for Sale	NOTE 4 — ASSETS HELD FOR SALE
	In September 2014, the Company entered into an agreement to sell Railroad Pass for $8 million which is contingent upon regulatory approvals and other customary closing conditions. The assets and liabilities of Railroad Pass have been classified as held for sale as of December 31, 2014.  The Company recognized a $1 million impairment charge recorded in “Property transactions, net” based on fair value less cost to sell the related assets and liabilities.  Assets held for sale of $9 million, comprised predominantly of property, plant and equipment, are classified within “Prepaid expenses and other”  and  liabilities related to assets held for sale of $2 million, comprised of accounts payable and other accrued liabilities, are classified  within “Other accrued liabilities.”
	In October 2014, the Company entered into an agreement to sell Gold Strike and related assets in Jean, Nevada, for $12 million which is contingent upon regulatory approvals and other customary closing conditions.  The assets and liabilities of Gold Strike have been classified as held for sale as of December 31, 2014.  The Company recognized a $1 million impairment charge recorded in “Property transactions, net” based on fair value less cost to sell the related assets and liabilities. Assets held for sale of $14 million comprised predominantly of property, plant and equipment, are classified within “Prepaid expenses and other”  and  liabilities related to assets held for sale of $2 million, comprised of accounts payable and other accrued liabilities, are classified  within “Other accrued liabilities.
	Railroad Pass and Gold Strike have not been classified as discontinued operations because the Company has concluded that the sales will not have a major effect on the Company’s operations or its financial results and it does not represent a disposal of a major geographic segment or product line.

Property_and_Equipment_Net

Property and Equipment, Net	12 Months Ended
	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Property and Equipment, Net	NOTE 5 — PROPERTY AND EQUIPMENT, NET
	Property and equipment, net consisted of the following:
		December 31,
		2014			2013
		(In thousands)
	Land	$	6,475,134		$	6,477,489
	Buildings, building improvements and land improvements		9,313,308			9,264,455
	Furniture, fixtures and equipment		4,178,723			4,040,887
	Construction in progress		999,616			437,434
			20,966,781			20,220,265
	Less: Accumulated depreciation and amortization		(6,525,239	)		(6,165,053	)
		$	14,441,542		$	14,055,212

Investments_in_and_Advances_to

Investments in and Advances to Unconsolidated Affiliates	12 Months Ended
	Dec. 31, 2014
Equity Method Investments And Joint Ventures [Abstract]
Investments in and Advances to Unconsolidated Affiliates	NOTE 6 — INVESTMENTS IN AND ADVANCES TO UNCONSOLIDATED AFFILIATES
	Investments in and advances to unconsolidated affiliates consisted of the following:
			December 31,
			2014			2013
			(In thousands)
	CityCenter Holdings, LLC – CityCenter (50%)		$	1,221,306		$	1,172,087
	Elgin Riverboat Resort–Riverboat Casino – Grand Victoria (50%)			141,162			169,579
	Marina District Development Company – Borgata (50%)			109,252			94,425
	Other			87,314			33,170
			$	1,559,034		$	1,469,261
	The Company recorded its share of the net income (loss) from unconsolidated affiliates, including adjustments for basis differences, as follows:
			Year Ended December 31,
			2014			2013			2012
			(In thousands)
	Income (loss) from unconsolidated affiliates		$	63,836		$	68,829		$	(16,800	)
	Preopening and start-up expenses			(917	)		(507	)		(656	)
	Non-operating items from unconsolidated affiliates			(87,794	)		(208,682	)		(130,845	)
			$	(24,875	)	$	(140,360	)	$	(148,301	)
	CityCenter
	Perini litigation settlement. During 2014, the Company and CityCenter entered into various settlement agreements related to its construction litigation with Perini, the remaining Perini subcontractors and relevant insurers, as discussed in Note 11. As a result, CityCenter recognized $48 million of property transactions, net during 2014, of which the Company recognized its share of $24 million.
	October 2013 debt restructuring transactions. In October 2013, CityCenter entered into a $1.775 billion senior secured credit facility. The senior secured credit facility consists of a $75 million revolving facility maturing in October 2018, and a $1.7 billion term loan B facility maturing in October 2020. The term loan B facility was issued at 99% of the principal amount and bears interest at LIBOR plus 3.25% with a LIBOR floor of 1.00%. Concurrent with the closing of the new senior secured credit facility, CityCenter issued a notice of full redemption with respect to its existing 7.625% senior secured first lien notes and 10.75%/11.50% senior secured second lien PIK toggle notes and discharged each of the indentures for its first and second lien notes at a premium in accordance with the terms of such indentures. As a result of the transaction, the Company recorded a charge of $70 million for its share of CityCenter’s non-operating loss on retirement of long-term debt, primarily consisting of premiums associated with the redemption of the existing first and second lien notes as well as the write-off of previously unamortized debt issuance costs.  During 2014, CityCenter permanently repaid $154 million of its term loan B facility.
	In addition, in connection with the October 2013 debt restructuring, sponsor notes with a carrying value of approximately $738 million were converted to members’ equity. Subsequent to these transactions, CityCenter’s senior credit facility is its only remaining long-term debt.  The senior secured credit facility is secured by substantially all the assets of CityCenter, and contains certain financial covenants including minimum interest coverage ratios and maximum leverage ratio requirements (as defined in the agreements).
	Completion guarantee. In October 2013, the Company entered into an amended completion and cost overrun guarantee in connection with CityCenter’s restated senior credit facility agreement as discussed in Note 11.
	Residential inventory impairment.  CityCenter is required to carry its residential inventory at the lower of its carrying value or fair value less costs to sell. Fair value of the residential inventory is determined using a discounted cash flow analysis based on management’s current expectations of future cash flows. The key inputs in the discounted cash flow analysis include estimated sales prices of units currently under contract and new unit sales, the absorption rate over the sell-out period, and the discount rate.  CityCenter recorded an impairment charge of $36 million in 2012. The Company recognized 50% of such impairment charges, resulting in a charge of approximately $18 million.
	Harmon.  CityCenter accrued $32 million in 2012 related to the estimated demolition cost of the Harmon.  The Company recognized 50% of such charge, resulting in a charge of approximately $16 million.  See Note 11 for additional information regarding Harmon.
	Grand Victoria
	At June 30, 2014, the Company reviewed the carrying value of its Grand Victoria investment for impairment due to a greater than anticipated decline in operating results, as well as a decrease in forecasted cash flows for the remainder of 2014 through 2017 compared to the prior forecast. The Company used a blended discounted cash flow analysis and guideline public company method to determine the estimated fair value from a market participant’s viewpoint. Key assumptions included in the discounted cash flow analysis were estimates of future cash flows including outflows for capital expenditures, a long-term growth rate of 2% and a discount rate of 10.5%. Key assumptions in the guideline public company method included business enterprise value multiples selected based on the range of multiples in Grand Victoria’s peer group. As a result of the analysis, the Company determined that it was necessary to record an other-than-temporary impairment charge of $29 million at June 30, 2014, based on an estimated fair value of $140 million for the Company’s 50% interest. The Company intends to, and believes it will be able to, retain the investment in Grand Victoria; however, due to the extent of the shortfall and the Company’s assessment of the uncertainty of fully recovering its investment, the Company has determined that the impairment was other-than temporary.
	At June 30, 2013, the Company reviewed the carrying value of its Grand Victoria investment for impairment due to a higher than anticipated decline in operating results and loss of market share as a result of the opening of a new river boat casino in the Illinois market, as well as a decrease in forecasted cash flows compared to the prior forecast. The Company used a blended discounted cash flow analysis and guideline public company method to determine the estimated fair value from a market participant’s viewpoint. Key assumptions included in the discounted cash flow analysis were estimates of future cash flows including outflows for capital expenditures, a long-term growth rate of 2% and a discount rate of 11%. Key assumptions in the guideline public company method included business enterprise value multiples selected based on the range of multiples in Grand Victoria’s peer group. As a result of the analysis, the Company determined that it was necessary to record an other-than-temporary impairment charge of $37 million based on an estimated fair value of $170 million for the Company’s 50% interest.
	At June 30, 2012, the Company reviewed the carrying value of its Grand Victoria investment for impairment due to a decrease in operating results at the property and the loss of market share as a result of the opening of a new riverboat casino in the Illinois market, as well as a decrease in forecasted cash flows.  The Company used a discounted cash flow analysis to determine the estimated fair value.  Key assumptions included in the analysis were estimates of future cash flows including outflows for capital expenditures, a long-term growth rate of 2% and a discount rate of 10.5%.  As a result of the discounted cash flow analysis, the Company determined that it was necessary to record an other-than-temporary impairment charge of $85 million based on an estimated fair value of $205 million for the Company’s 50% interest.
	Borgata
	In September 2014, the New Jersey Casino Control Commission (“CCC”) approved the Company’s request for licensure in the State of New Jersey. The Company’s request for licensure was submitted pursuant to its amended settlement agreement with the New Jersey Division of Gaming Enforcement. Prior to receiving the approval, the Company’s Borgata interest was held in trust and the sale of the Company’s interest was mandated within a defined divestiture period pursuant to the amended settlement agreement. In connection with the approval of the Company’s request for licensure, the CCC agreed to terminate the amended settlement agreement and dissolve and terminate the divestiture trust. Upon dissolution of the trust, all of the trust assets, including $83 million of cash, were transferred to the Company.
	Prior to dissolution, the Company had consolidated the trust because it was the sole economic beneficiary, and accounted for its interest in Borgata under the cost method. In connection with the dissolution of the trust, the Company regained significant influence in Borgata and therefore resumed accounting for its interest under the equity method. The Company’s investment in Borgata, current and prior period net income and retained earnings have been adjusted retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods in which the Company’s investment was held in trust. The impact of the retroactive adjustments on net loss for the year ended December 31, 2013 was an increase of $15 million.  There was no net impact of the retroactive adjustments on net income for the year ended December 31, 2012.  There was no cumulative impact resulting from the retroactive adjustments on retained earnings at January 1, 2012.
	The Company determined that it was necessary to record an other-than-temporary impairment charge for its investment in Borgata of $54 million as of December 31, 2012 using an estimated fair value for its investment of $120 million based on a discounted cash flow analysis. Borgata’s 2012 operating results did not meet previous forecasts. While 2012 results for Borgata were significantly impacted by Hurricane Sandy, management believed the challenging environment in Atlantic City would continue and lowered 2013 estimates below what was previously forecasted. Additionally, the Company used a long-term growth rate of 2.5% and a discount rate of 10.5%, based on its assessment of risk associated with the estimated cash flows.
	Las Vegas Arena
	In September 2014, a wholly-owned subsidiary of Las Vegas Arena Company entered into a senior secured credit facility to finance construction of the Las Vegas Arena. The senior secured credit facility consists of a $125 million term loan A and a $75 million term loan B. The senior secured credit facility matures in October 2016, with an option to extend the maturity for three years. The senior secured credit facility is secured by substantially all the assets of the Las Vegas Arena Company, and contains certain financial covenants applicable upon opening of the Las Vegas Arena. The Company and AEG have agreed to contribute a total of $175 million in cash towards construction of the Arena, of which each party had contributed $38 million as of December 31, 2014. See Note 11 for discussion of the Company’s joint and several completion and payment guarantees.
	Silver Legacy
	Silver Legacy had approximately $143 million of outstanding senior secured notes that were due in March 2012. Silver Legacy did not repay its notes at maturity and filed for Chapter 11 bankruptcy protection in May 2012. These notes were non-recourse to the Company. In November 2012, Silver Legacy completed a consensual plan of reorganization pursuant to which the holders of the senior secured notes received a combination of cash and new second lien notes. Concurrently, Silver Legacy entered into an agreement for a new $70 million senior secured credit facility, which provided for a portion of the exit financing associated with the plan of reorganization. As part of the reorganization, the members invested $7.5 million each in the form of subordinated sponsor notes. The Company resumed the equity method of accounting for its investment in Silver Legacy subsequent to completion of the reorganization.  In December 2013, Silver Legacy entered into a new senior credit facility and redeemed its outstanding second lien notes.  Silver Legacy recognized a gain of $24 million in connection with these transactions.  The Company recognized $12 million, its share of the gain, within non-operating items from unconsolidated affiliates.
	Unconsolidated Affiliate Financial Information
	Summarized balance sheet information of the unconsolidated affiliates is as follows:
			December 31,
			2014			2013
			(In thousands)
	Current assets		$	772,412		$	614,474
	Property and other assets, net			9,394,703			9,754,247
	Current liabilities			683,452			627,598
	Long-term debt and other long-term obligations			2,409,478			2,604,629
	Equity			7,074,185			7,136,494
	Summarized results of operations of the unconsolidated affiliates are as follows:
			Year Ended December 31,
			2014			2013			2012
			(In thousands)
	Net revenues		$	2,299,698		$	2,280,309		$	2,213,577
	Operating expenses			(2,278,039	)		(2,247,743	)		(2,361,027	)
	Operating income (loss)			21,659			32,566			(147,450	)
	Interest expense			(164,055	)		(328,740	)		(360,021	)
	Non-operating expenses			(13,337	)		(146,898	)		(4,076	)
	Net loss		$	(155,733	)	$	(443,072	)	$	(511,547	)
	Basis Differences
	The Company’s investments in unconsolidated affiliates do not equal the venture-level equity due to various basis differences. Basis differences related to depreciable assets are being amortized based on the useful lives of the related assets and liabilities and basis differences related to non–depreciable assets, such as land and indefinite-lived intangible assets, are not being amortized. Differences between the Company’s venture-level equity and investment balances are as follows:
			December 31,
			2014			2013
			(In thousands)
	Venture-level equity		$	3,532,746		$	3,563,232
	Adjustment to CityCenter equity upon contribution of net assets by MGM Resorts			(578,554	)		(583,946	)
International (1)
CityCenter capitalized interest (2)			251,450			261,526
Completion guarantee (3)			466,660			411,944
Advances to CityCenter, net of discount (4)			(49,892	)		(53,296	)
Other-than-temporary impairments of CityCenter investment (5)			(1,857,673	)		(1,915,153	)
Other-than-temporary impairments of Borgata investment (6)			(130,333	)		(134,217	)
Fair value adjustments upon acquisition of Grand Victoria investment (7)			267,190			267,190
Other adjustments (8)			(342,560	)		(348,019	)
		$	1,559,034		$	1,469,261
-1	Primarily relates to land and fixed assets.
-2	Relates to interest capitalized on the Company’s investment balance during development and construction stages.
-3	Created by contributions to CityCenter under the completion guarantee recognized as equity contributions by CityCenter split between the members.
-4	During 2013, the Company converted its CityCenter sponsor notes to equity, resolving the basis difference related to such notes which were previously recognized as long-term debt by CityCenter.  The remaining basis difference relates to interest on the notes capitalized by CityCenter during development.
-5	The impairment of the Company’s CityCenter investment includes $426 million of impairments allocated to land.
-6	The impairment of the Company’s Borgata investment includes $90 million of impairments allocated to land.
-7	Relates to indefinite-lived gaming license rights for Grand Victoria.
-8	Other adjustments include the deferred gain on assets contributed to CityCenter upon formation of CityCenter and other-than-temporary impairments of the Company’s investment in Grand Victoria and Silver Legacy.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE 7 — GOODWILL AND OTHER INTANGIBLE ASSETS
	Goodwill and other intangible assets consisted of the following:
		December 31,
		2014			2013
	Goodwill:	(In thousands)
	Wholly owned domestic resorts	$	70,975		$	70,975
	MGM China		2,826,135			2,826,467
		$	2,897,110		$	2,897,442
	Indefinite-lived intangible assets:
	Detroit development rights	$	98,098		$	98,098
	Trademarks, license rights and other		232,123			232,123
	Total indefinite-lived intangible assets		330,221			330,221
	Finite-lived intangible assets:
	MGM Grand Paradise gaming subconcession		4,513,101			4,513,631
	Less: Accumulated amortization		(692,047	)		(526,152	)
			3,821,054			3,987,479
	MGM Macau land concession		84,717			84,727
	Less: Accumulated amortization		(15,272	)		(11,003	)
			69,445			73,724
	MGM China customer lists		128,946			128,961
	Less: Accumulated amortization		(116,664	)		(101,240	)
			12,282			27,721
	MGM China gaming promoter relationships		180,524			180,545
	Less: Accumulated amortization		(161,467	)		(116,335	)
			19,057			64,210
	Maryland license, Massachusetts license and other intangible assets		136,827			51,827
	Less: Accumulated amortization		(24,030	)		(23,321	)
			112,797			28,506
	Total finite-lived intangible assets, net		4,034,635			4,181,640
	Total other intangible assets, net	$	4,364,856		$	4,511,861
	Goodwill related to wholly owned domestic resorts relates to the acquisition of Mirage Resorts in 2001 and the acquisition of Mandalay Resort Group in 2005.  The Company recognized goodwill resulting from its acquisition of MGM China in 2011.
	The Company’s indefinite-lived intangible assets consist primarily of development rights in Detroit, trademarks and license rights, of which $213 million consists of trademarks and trade names related to the Mandalay Resort Group acquisition.
	MGM Grand Paradise gaming subconcession.  Pursuant to the agreement dated June 19, 2004 between MGM Grand Paradise and Sociedade de Jogos de Macau, S.A., a gaming subconcession was acquired by MGM Grand Paradise for the right to operate casino games of chance and other casino games for a period of 15 years commencing on April 20, 2005. The Company cannot provide any assurance that the gaming subconcession will be extended beyond the original terms of the agreement; however, management believes that the gaming subconcession will be extended, given that the land concession agreement with the government extends significantly beyond the gaming subconcession. In addition, management believes that the fair value of MGM China reflected in the IPO pricing suggests that market participants have assumed the gaming subconcession will be extended beyond its initial term. As such, the Company was amortizing the gaming subconcession intangible asset on a straight-line basis over the initial term of the land concession through April 6, 2031.  In January 2013, the Company’s Cotai land concession was gazetted by the Macau government at which time the Company determined that the estimated remaining useful life of its gaming subconcession would be extended through the initial 25-year term of the Cotai land concession, ending in January 2038.
	MGM Macau land concession. MGM Grand Paradise entered into a contract with the Macau government to use the land under MGM Macau commencing from April 6, 2006.  The land use right has an initial term through April 6, 2031, subject to renewal for additional periods. The land concession intangible asset is amortized on a straight-line basis over the remaining initial contractual term.
	MGM China customer lists. The Company recognized an intangible asset related to customer lists, which is amortized on an accelerated basis over its estimated useful life of five years.
	MGM China gaming promoter relationships.  The Company recognized an intangible asset related to its relationships with gaming promoters, which is amortized on a straight-line basis over its estimated useful life of four years.
	Maryland license.  The Company was granted a license to operate a casino in Maryland.  The consideration paid to the State of Maryland for the license fee of $22 million is considered a finite-lived intangible asset that will be amortized over a period of 15 years beginning upon the opening of the casino resort.
	Massachusetts license.  The Company was granted a license to operate a casino in Massachusetts.  The consideration paid to the State of Massachusetts for the license fee of $85 million is considered a finite-lived intangible asset that will be amortized over a period of 15 years beginning upon the opening of the casino resort.
	Other.  The Company’s other finite–lived intangible assets consist primarily of lease acquisition costs amortized over the life of the related leases, and certain license rights amortized over their contractual life.
	Total amortization expense related to intangible assets was $232 million, $243 million and $321 million for 2014, 2013, and 2012, respectively.  Estimated future amortization is as follows:
	Years ending December 31,	(In thousands)
	2015	$	199,256
	2016		174,317
	2017		173,794
	2018		178,044
	2019		178,044
	Thereafter		3,131,180
		$	4,034,635

Other_Accrued_Liabilities

Other Accrued Liabilities	12 Months Ended
	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Other Accrued Liabilities	NOTE 8 — OTHER ACCRUED LIABILITIES
	Other accrued liabilities consisted of the following:
		December 31,
		2014		2013
		(In thousands)
	Payroll and related	$	369,497	$	394,709
	Advance deposits and ticket sales		103,440		104,504
	Casino outstanding chip liability		294,466		409,917
	Casino front money deposits		122,184		125,180
	MGM China gaming promoter commissions		74,754		118,122
	Other gaming related accruals		114,165		137,181
	Taxes, other than income taxes		201,562		236,991
	Completion guarantee liability		148,929		97,223
	Other		145,620		146,974
		$	1,574,617	$	1,770,801

LongTerm_Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Long-Term Debt	NOTE 9 — LONG-TERM DEBT
	Long-term debt consisted of the following:
			December 31,
			2014				2013
	Senior credit facility:		(In thousands)
	$2,744 million ($2,772 million at December 31, 2013) term loans, net		$	2,738,118			$	2,765,041
	MGM Grand Paradise credit facility			553,177				553,242
	$508.9 million 5.875% senior notes, due 2014, net			-				508,848
	$1,450 million 4.25% convertible senior notes, due 2015, net			1,451,405				1,456,153
	$875 million 6.625% senior notes, due 2015, net			875,370				876,022
	$242.9 million 6.875% senior notes, due 2016			242,900				242,900
	$732.7 million 7.5% senior notes, due 2016			732,749				732,749
	$500 million 10% senior notes, due 2016, net			497,955				496,987
	$743 million 7.625% senior notes, due 2017			743,000				743,000
	$475 million 11.375% senior notes, due 2018, net			468,949				467,451
	$850 million 8.625% senior notes, due 2019			850,000				850,000
	$500 million 5.25% senior notes, due 2020			500,000				500,000
	$1,000 million 6.75% senior notes, due 2020			1,000,000				1,000,000
	$1,250 million 6.625% senior notes, due 2021			1,250,000				1,250,000
	$1,000 million 7.75% senior notes, due 2022			1,000,000				1,000,000
	$1,250 million 6% senior notes, due 2023, net			1,250,742				-
	$0.6 million 7% debentures, due 2036, net			572				572
	$4.3 million 6.7% debentures, due 2096			4,265				4,265
				14,159,202				13,447,230
	Less: Current portion			(1,245,320	)			-
			$	12,913,882			$	13,447,230
	As of December 31, 2014, the amount available under the Company’s revolving senior credit facility is less than current maturities related to the Company’s senior notes, convertible senior notes, and term loan credit facilities. The Company has excluded from the current portion of long-term debt the amount available for refinancing under its revolving credit facility.
	Interest expense, net consisted of the following:
		Year Ended December 31,
		2014				2013			2012
		(In thousands)
	Total interest incurred	$	846,321			$	862,417		$	1,117,327
	Interest capitalized		(29,260	)			(5,070	)		(969	)
		$	817,061			$	857,347		$	1,116,358
	Senior credit facility. At December 31, 2014, the Company’s senior credit facility consisted of a $1.2 billion revolving credit facility, a $1.03 billion term loan A facility and a $1.72 billion term loan B facility. The revolving and term loan A facilities bear interest at LIBOR plus an applicable rate determined by the Company’s credit rating (2.75% as of December 31, 2014). The term loan B facility was re-priced in May 2013 and bears interest at LIBOR plus 2.50%, with a LIBOR floor of 1.00%.  As a result of the May 2013 re-pricing, the Company recorded a loss of $4 million during 2013 on retirement of debt in “Other, net.” The revolving and term loan A facilities mature in December 2017 and the term loan B facility matures in December 2019. The term loan A and term loan B facilities are subject to scheduled amortization payments on the last day of each calendar quarter in an amount equal to 0.25% of the original principal balance. The Company permanently repaid $28 million in 2014, in accordance with the scheduled amortization. The Company had $1.1 billion of available borrowing capacity under its senior credit facility at December 31, 2014. At December 31, 2014, the interest rate on the term loan A was 2.9% and the interest rate on the term loan B was 3.50%. The Company’s senior credit facility was amended and restated in February 2012 and again in December 2012.  In connection with these transactions the Company recorded losses on retirements of debt of $107 million in “Other, net” during 2012 related to previously recorded discounts and certain debt issuance costs.
	The land and substantially all of the assets of MGM Grand Las Vegas, Bellagio and The Mirage secure up to $3.35 billion of obligations outstanding under the senior credit facility. In addition, the land and substantially all of the assets of New York-New York and Gold Strike Tunica secure the entire amount of the senior credit facility and the land and substantially all of the assets of MGM Grand Detroit secure its $450 million of obligations as a co-borrower under the senior credit facility. In addition, the senior credit facility is secured by a pledge of the equity or limited liability company interests of the subsidiaries that own the pledged properties.
	The senior credit facility contains customary representations and warranties and customary affirmative and negative covenants. In addition, the senior credit facility requires the Company and its restricted subsidiaries (the “Restricted Group”) to maintain a minimum trailing four-quarter EBITDA and limits the ability of the Restricted Group to make capital expenditures and investments. As of December 31, 2014, the Restricted Group is required to maintain a minimum EBITDA (as defined) of $1.20 billion. The minimum EBITDA requirement increases to $1.25 billion for March 31, 2015 and June 30, 2015 and to $1.30 billion for September 30, 2015 and December 31, 2015, with periodic increases thereafter. EBITDA for the trailing four quarters ended December 31, 2014 calculated in accordance with the terms of the senior credit facility was $1.37 billion. The senior credit facility limits the Restricted Group to capital expenditures of $500 million per fiscal year, with unused amounts in any fiscal year rolling over to the next fiscal year, but not any fiscal year thereafter.  The Restricted Group’s total capital expenditures allowable under the senior credit facility for fiscal year 2014, after giving effect to unused amounts from 2013, was $681 million. In addition, the senior credit facility limits the Restricted Group’s ability to make investments subject to certain thresholds and other important exceptions.  The Restricted Group was within the limit of capital expenditures and other investments for the 2014 calendar year.
	The senior credit facility provides for customary events of default, including, without limitation, (i) payment defaults, (ii) covenant defaults, (iii) cross-defaults to certain other indebtedness in excess of specified amounts, (iv) certain events of bankruptcy and insolvency, (v) judgment defaults in excess of specified amounts, (vi) the failure of any loan document by a significant party to be in full force and effect and such circumstance, in the reasonable judgment of the required lenders, is materially adverse to the lenders, or (vii) the security documents cease to create a valid and perfected first priority lien on any material portion of the collateral. In addition, the senior credit facility provides that a cessation of business due to revocation, suspension or loss of any gaming license affecting a specified amount of its revenues or assets, will constitute an event of default.
	MGM Grand Paradise credit facility. At December 31, 2014, the MGM Grand Paradise credit facility consisted of approximately $550 million of term loans and an approximately $1.45 billion revolving credit facility due October 2017. The credit facility is subject to scheduled amortization payments beginning in 2016. The outstanding balance at December 31, 2014 was comprised solely of term loans. The interest rate on the facility fluctuates annually based on HIBOR plus a margin, which ranges between 1.75% and 2.50%, based on MGM China’s leverage ratio. The margin was 1.75% at December 31, 2014. MGM China is a joint and several co-borrower with MGM Grand Paradise. The MGM Grand Paradise credit facility is secured by MGM Grand Paradise’s interest in the Cotai land use right, and MGM China, MGM Grand Paradise and their guarantor subsidiaries have granted a security interest in substantially all of their assets to secure the facility.  The credit facility will be used for general corporate purposes and for the development of MGM Cotai.
	The MGM Grand Paradise credit facility agreement contains customary representations and warranties, events of default, affirmative covenants and negative covenants, which impose restrictions on, among other things, the ability of MGM China and its subsidiaries to make investments, pay dividends and sell assets, and to incur additional debt and additional liens. MGM China is also required to maintain compliance with a maximum consolidated total leverage ratio of 4.50 to 1.00 prior to the first anniversary of the MGM Cotai opening date and 4.00 to 1.00 thereafter, in addition to a minimum interest coverage ratio of 2.50 to 1.00. MGM China was in compliance with the credit facility covenants at December 31, 2014.
	Senior Notes. During 2014, the Company repaid its $509 million 5.875% senior notes at maturity and issued $1.25 billion of 6% senior notes due 2023 for net proceeds of $1.24 billion. In 2013, the Company repaid its $462 million 6.75% senior notes and $150 million 7.625% senior subordinated debentures at maturity and issued $500 million of 5.25% senior notes due 2020 for net proceeds of $494 million. The senior notes are unsecured and otherwise rank equally in right of payment with the Company’s existing and future senior indebtedness. The senior notes are effectively subordinated to the Company’s existing and future secured obligations, primarily consisting of its senior credit facility, to the extent of the value of the assets securing such obligations.
	Tender offers. In December 2012, the Company completed the early settlement of its tender offers for its 13% senior secured notes due 2013, 10.375% senior secured notes due 2014, 11.125% senior secured notes due 2017 and 9% senior secured notes due 2020 and called for redemption of all of the secured notes that were not purchased on the early settlement date and satisfied and discharged the indentures governing the secured notes. As a result of the redemption and the satisfaction and discharge of the secured notes indentures, the Company was released from its obligations under the indentures and all of the collateral securing those notes was released. The Company recorded a loss on retirement of the secured notes of $457 million in “Other, net” which included $379 million of premiums paid to redeem or discharge the debt, the write-off of $75 million of previously recorded discounts and debt issuance costs, and $3 million of other costs in 2012.
	Senior convertible notes.  In April 2010, the Company issued $1.15 billion of 4.25% convertible senior notes due 2015 for net proceeds to the Company of $1.12 billion.  The notes are general unsecured obligations of the Company and rank equally in right of payment with the Company’s other existing senior unsecured indebtedness. The notes are convertible at an initial conversion rate of approximately 53.83 shares of the Company’s common stock per $1,000 principal amount of the notes, representing an initial conversion price of approximately $18.58 per share of the Company’s common stock.  In connection with the offering, the Company entered into capped call transactions to reduce the potential dilution of the Company’s stock upon conversion of the notes.  The capped call transactions have a cap price equal to approximately $21.86 per share.
	In June 2011, the Company sold an additional $300 million in aggregate principal amount of 4.25% convertible senior notes due 2015 (the “Notes”) on terms that were consistent with those governing the Company’s existing convertible senior notes due 2015 for a purchase price of 103.805% of the principal amount. The Company received approximately $311 million in proceeds related to this transaction.  The Notes were recorded at fair value determined by the trading price (105.872%) of the Company’s existing convertible notes on the date of issuance of the Notes, with the excess over the principal amount recorded as a premium to be recognized over the term of the Notes.
	Maturities of long-term debt.  Maturities of the Company’s long-term debt as of December 31, 2014 are as follows:
	Years ending December 31,				(In thousands)
	2015				$	2,353,000
	2016					1,641,944
	2017					2,183,382
	2018					492,500
	2019					2,495,000
	Thereafter					5,004,817
						14,170,643
	Debt premiums and discounts, net					(11,441	)
					$	14,159,202
	Fair value of long-term debt. The estimated fair value of the Company’s long-term debt at December 31, 2014 was approximately $15.1 billion. The estimated fair value of the Company’s long-term debt at December 31, 2013 was approximately $14.9 billion. Fair value was estimated using quoted market prices for the Company’s senior notes and senior credit facility.  Carrying value of the MGM Grand Paradise credit facility approximates fair value.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 10 — INCOME TAXES
	The Company recognizes deferred income tax assets, net of applicable reserves, related to net operating loss tax credit carryforwards and certain temporary differences.  The Company recognizes future tax benefits to the extent that realization of such benefit is more likely than not.  Otherwise, a valuation allowance is applied.
	Income (loss) before income taxes for domestic and foreign operations consisted of the following:
		Year Ended December 31,
		2014			2013			2012
		(In thousands)
	Domestic operations	$	(168,135	)	$	(444,891	)	$	(2,048,868	)
	Foreign operations		579,021			507,081			314,655
		$	410,886		$	62,190		$	(1,734,213	)
	The benefit (provision) for income taxes attributable to income (loss) before income taxes is as follows:
		Year Ended December 31,
		2014			2013			2012
	Federal:	(In thousands)
	Current	$	(10,448	)	$	3,532		$	1,636
	Deferred (excluding separate components)		785,225			963,919			1,011,881
	Deferred – operating loss carryforward		(277,453	)		(305,760	)		89,954
	Deferred – valuation allowance		(815,851	)		(634,190	)		(1,017,228	)
	Other noncurrent		33,130			14,522			(1,587	)
	Benefit (provision) for federal income taxes		(285,397	)		42,023			84,656
	State:
	Current		(2,214	)		(1,812	)		(3,466	)
	Deferred (excluding separate components)		4,338			4,056			24,104
	Deferred – operating loss carryforward		531			393			9,221
	Deferred – valuation allowance		412			(4,374	)		(2,579	)
	Other noncurrent		(547	)		879			(5,493	)
	Benefit (provision) for state income taxes		2,520			(858	)		21,787
	Foreign:
	Current		(1,656	)		(2,214	)		(3,217	)
	Deferred (excluding separate components)		1,726			(70,440	)		12,471
	Deferred – operating loss carryforward		3,495			1,312			(782	)
	Deferred – valuation allowance		(4,396	)		9,361			2,386
	Benefit (provision) for foreign income taxes		(831	)		(61,981	)		10,858
		$	(283,708	)	$	(20,816	)	$	117,301
	A reconciliation of the federal income tax statutory rate and the Company’s effective tax rate is as follows:
		Year Ended December 31,
		2014			2013			2012
	Federal income tax statutory rate		35	%		35	%		35	%
	Foreign tax credit		(222.0	)		(1,557.1	)		45.2
	Repatriation of foreign earnings		113.2			738.4			(19.2	)
	Federal valuation allowance		198.6			1,019.80			(58.7	)
	State income tax, net of federal benefit and valuation allowance		(0.4	)		0.8			0.8
	Settlements with taxing authorities		(7.6	)		(23.5	)		-
	Macau deferred tax liability re-measurement		-			96.1			-
	Foreign jurisdiction income/losses taxed at other than 35%		(49.1	)		(281.8	)		7
	Tax credits		(1.0	)		(13.1	)		0.5
	Permanent and other items		2.3			18.9			(3.8	)
			69	%		33.5	%		6.8	%
	The major tax-effected components of the Company’s net deferred tax liability are as follows:
		December 31,
		2014			2013
	Deferred tax assets – federal and state:	(In thousands)
	Senior secured notes retirement	$	-		$	647
	Bad debt reserve		47,563			37,327
	Deferred compensation		4,074			3,680
	Net operating loss carryforward		21,555			304,077
	Accruals, reserves and other		129,311			148,303
	Investments in unconsolidated affiliates		236,528			268,896
	Stock-based compensation		34,449			31,185
	Tax credits		2,601,653			1,796,599
			3,075,133			2,590,714
	Less: Valuation allowance		(2,498,299	)		(1,665,846	)
			576,834			924,868
	Deferred tax assets – foreign:
	Bad debt reserve		1,456			333
Net operating loss carryforward		59,329			55,834
Accruals, reserves and other		64			154
Property and equipment		10,687			11,204
		71,536			67,525
Less: Valuation allowance		(60,468	)		(56,071	)
		11,068			11,454
Total deferred tax assets	$	587,902		$	936,322
Deferred tax liabilities – federal and state:
Property and equipment		(2,549,866	)		(2,488,287	)
Long-term debt		(293,006	)		(360,666	)
Intangibles		(109,161	)		(105,231	)
		(2,952,033	)		(2,954,184	)
Deferred tax liabilities – foreign:
Intangibles		(319,871	)		(321,116	)
		(319,871	)		(321,116	)
Total deferred tax liability	$	(3,271,904	)	$	(3,275,300	)
Net deferred tax liability	$	(2,684,002	)	$	(2,338,978	)
Income generated from gaming operations of MGM Grand Paradise, which is wholly owned by MGM China, is exempted from Macau’s 12% complementary tax for the five-year period ending December 31, 2016, pursuant to approval from the Macau government, granted on September 22, 2011.  Absent this exemption, “Net loss attributable to MGM Resorts International” would have increased by $47 million and $43 million for 2014 and 2013, respectively, and net loss per share (diluted) would have increased by $0.10 and $0.09 for 2014 and 2013, respectively.  The approval granted in 2011 represented the second five-year exemption period granted to MGM Grand Paradise.  The Company measures the net deferred tax liability of MGM Grand Paradise under the assumption that it will receive an additional five-year exemption beyond 2016.  Such assumption is based upon the granting of a third five-year exemption to a competitor of MGM Grand Paradise.  The Company believes MGM Grand Paradise should also be entitled to a third five-year exemption in order to ensure non-discriminatory treatment among gaming concessionaires and subconcessionaires, a requirement under Macanese law.  The net deferred tax liability of MGM Grand Paradise was re-measured during the first quarter of 2013 due to the extension of the amortization period of the Macau gaming subconcession in connection with the effectiveness of the Cotai land concession.  This resulted in an increase in the net deferred tax liability and a corresponding increase in provision for income taxes of $65 million in 2013.
Non-gaming operations remain subject to the Macau complementary tax.  MGM Grand Paradise had at December 31, 2014 a complementary tax net operating loss carryforward of $493 million resulting from non-gaming operations that will expire if not utilized against non-gaming income in years 2015 through 2017. The Macanese net operating loss carryforwards are fully offset by a valuation allowance.
MGM Grand Paradise’s exemption from the Macau 12% complementary tax on gaming profits does not apply to dividend distributions of such profits to MGM China.  However, MGM Grand Paradise has entered into an agreement with the Macau government to settle the 12% complementary tax that would otherwise be due by its shareholder, MGM China, on distributions of its gaming profits by paying a flat annual payment (“annual fee arrangement”) regardless of the amount of distributable dividends.  Such annual fee arrangement is effective until December 31, 2016. MGM China is not subject to the complementary tax on distributions it receives during the covered period as a result of the annual fee arrangement. Annual payments of $2 million are required under the annual fee arrangement.  The $2 million annual payment for 2014 and 2013 was accrued and a corresponding provision for income taxes was recorded in each year.
The Company repatriated $390 and $312 million of foreign earnings and profits in 2014 and 2013, respectively.  At December 31, 2014, there are approximately $270 million of unrepatriated foreign earnings and profits, all of which the Company anticipates will be repatriated without the incurrence of additional U.S. income tax expense.  Accordingly, no deferred tax liability has been recorded for those earnings.  Creditable foreign taxes associated with the repatriated earnings and profits increased the Company’s foreign tax credit carryover by $813 million and $976 million in 2014 and 2013, respectively.  Such foreign taxes consist of the Macau Special Gaming Tax, which the Company believes qualifies as a tax paid in lieu of an income tax that is creditable against U.S. income taxes.  The foreign tax credit carryovers expire as follows: $2 million in 2015; $785 million in 2022; $976 million in 2023; and $813 million in 2024. The foreign tax credit carryovers are subject to valuation allowance as described further below.
The Company has an alternative minimum tax credit carryforward of $23 million that will not expire and a general business tax credit carryforward of $2 million that will begin to expire in 2034.
For state income tax purposes, the Company has Illinois and New Jersey net operating loss carryforwards of $82 million and $231 million, respectively, which equates to deferred tax assets after federal tax effect and before valuation allowance, of $4 million and $13 million, respectively.  The Illinois net operating loss carryforwards will expire if not utilized by 2021 through 2026.  The New Jersey net operating loss carryforwards will expire if not utilized by 2015 through 2034.
As of December 31, 2014, the scheduled future reversal of existing U.S. federal taxable temporary differences exceeds the scheduled future reversal of existing U.S. federal deductible temporary differences. Consequently, the Company no longer applies a valuation allowance against its domestic deferred tax assets other than the foreign tax credit deferred tax asset. The Company has recorded a valuation allowance of $2.5 billion against the $2.6 billion foreign tax credit deferred tax asset at December 31, 2014.  In addition, there is a $15 million valuation allowance, after federal effect, provided on certain state deferred tax assets and a valuation allowance of $60 million on certain Macau deferred tax assets because the Company believes these assets do not meet the “more likely than not” criteria for recognition.
The foreign tax credits are attributable to the Macau Special Gaming Tax which is 35% of gross gaming revenue in Macau.  Because MGM Grand Paradise is presently exempt from the Macau 12% complementary tax on gaming profits, the Company believes that payment of the Macau Special Gaming Tax qualifies as a tax paid in lieu of an income tax that is creditable against U.S. taxes. As long as the exemption from Macau’s 12% complementary tax on gaming profits continues, the Company expects that it will generate excess foreign tax credits on an annual basis and that none of the excess foreign credits will be utilized until the exemption expires. Although MGM Grand Paradise’s current five-year exemption from the Macau 12% complementary tax on gaming profits ends on December 31, 2016, the Company assumes that it will receive an additional five-year exemption beyond 2016 consistent with the assumption utilized for measurement of the net deferred tax liability of MGM Grand Paradise.  For all periods beyond December 31, 2021, the Company has assumed that MGM Grand Paradise will be paying the Macau 12% complementary tax on gaming profits and will thus not be able to credit the Macau Special Gaming Tax in such years, and have factored that assumption into its assessment of the realization of the foreign tax credit deferred tax asset.  Furthermore, the Company does not rely on future U.S source operating income in assessing future foreign tax credit realization due to its history of recent losses in the U.S. and therefore only relies on U.S. federal taxable temporary differences that it expects will reverse during the 10-year foreign tax credit carryover period.
The Company assesses its tax positions using a two-step process.  A tax position is recognized if it meets a “more likely than not” threshold, and is measured at the largest amount of benefit that is greater than 50 percent likely of being realized.  Uncertain tax positions must be reviewed at each balance sheet date.  Liabilities recorded as a result of this analysis must generally be recorded separately from any current or deferred income tax accounts, and at December 31, 2014, the Company has classified $26 million as long-term in “Other long-term obligations,” based on the time until expected payment.
A reconciliation of the beginning and ending amounts of gross unrecognized tax benefits is as follows:
	Year Ended December 31,
	2014			2013			2012
	(In thousands)
Gross unrecognized tax benefits at January 1	$	106,246		$	153,184		$	145,799
Gross increases - prior period tax positions		1,626			6,082			6,903
Gross decreases - prior period tax positions		(43,098	)		(35,508	)		(12,639	)
Gross increases - current period tax positions		5,066			4,064			13,121
Settlements with taxing authorities		(38,697	)		(21,576	)		-
Gross unrecognized tax benefits at December 31	$	31,143		$	106,246		$	153,184
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate was $12 million and $32 million at December 31, 2014 and 2013, respectively.
The Company recognizes accrued interest and penalties related to unrecognized tax benefits in income tax expense.   The Company had $4 million and $17 million in interest related to unrecognized tax benefits accrued at December 31, 2014 and 2013, respectively.  No amounts were accrued for penalties as of either date.  Income tax expense for the years ended December 31, 2014, 2013 and 2012 includes interest expense or benefit related to unrecognized tax benefits as follows:  $13 million benefit in 2014, $12 million benefit in 2013 and $3 million expense in 2012.
The Company files income tax returns in the U.S. federal jurisdiction, various state and local jurisdictions, and foreign jurisdictions, although the income taxes paid in foreign jurisdictions are not material.  As of December 31, 2014, the Company is no longer subject to examination of its U.S. consolidated federal income tax returns filed for years ended prior to 2010. During the second quarter of 2014, the Company received final approval from the Joint Committee on Taxation of the results of the IRS examination of its consolidated federal income tax returns for the 2005 through 2009 tax years; the 2007 through 2008 tax years of CityCenter Holdings, LLC, an unconsolidated affiliate treated as a partnership for income tax purposes; the 2008 through 2009 tax years of MGM Grand Detroit, LLC, a subsidiary treated as a partnership for income tax purposes; and the 2005 through 2009 tax years of Marina District Development Holding Company, LLC an unconsolidated affiliate treated as a partnership for income tax purposes. These examinations are now considered settled for financial reporting purposes.  The Company previously deposited $30 million with the IRS to cover the expected cash taxes and interest resulting from the tentatively agreed adjustments for these examinations. During 2013, the Company favorably settled all issues on appeal with IRS Appeals with respect to the examination of its consolidated federal income tax returns for the 2003 and 2004 tax years resulting in a refund of $2 million, including interest.
During the fourth quarter of 2013, the IRS opened an examination of the 2009 through 2011 tax years of CityCenter Holdings, LLC.  The Company anticipates that this examination will be settled during 2015.
As of December 31, 2014, other than adjustments resulting from the federal income tax audits discussed above and the exceptions noted below, the Company was no longer subject to examination of its various state and local tax returns filed for years ended prior to 2010. The state of Michigan initiated during the second quarter of 2013 a review of the Michigan Business Tax returns of MGM Grand Detroit, LLC for the 2009 through 2011 tax years to determine whether to open an examination of one or more of these years and subsequently informed the Company that it would take no further actions with respect to these years. During 2010, the state of New Jersey began examination of Marina District Development Holding Company, LLC for the 2003 through 2006 tax years. The Company anticipates that this examination will be settled in 2015. No other state or local income tax returns are currently under examination.
The Company believes that it is reasonably possible that the total amounts of unrecognized tax benefits at December 31, 2014 may decrease by up to $10 million within the next twelve months on the expectation during such period of settlement of the IRS examination of the 2009 through 2011 federal income tax returns of CityCenter Holdings, LLC and the examination of the 2003 through 2006 New Jersey state tax returns of Marina District Development Holding Company, LLC.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 11 – COMMITMENTS AND CONTINGENCIES
	Leases.  The Company leases real estate and various equipment under operating and, to a lesser extent, capital lease arrangements.  Certain real estate leases provide for escalation of rent based upon a specified price index and/or based upon periodic appraisals.
	At December 31, 2014, the Company was obligated under non-cancellable operating leases and capital leases to make future minimum lease payments as follows:
		Operating		Capital
		Leases		Leases
	Years ending December 31,	(In thousands)
	2015	$	53,380	$	5,376
	2016		53,372		4,057
	2017		24,333		3,143
	2018		22,246		1,596
	2019		20,300		-
	Thereafter		1,104,400		-
	Total minimum lease payments	$	1,278,031		14,172
	Less: Amounts representing interest				(1,214	)
	Total obligations under capital leases				12,958
	Less: Amounts due within one year				(4,691	)
	Amounts due after one year			$	8,267
	The current and long-term obligations under capital leases are included in “Other accrued liabilities” and “Other long-term obligations,” respectively.  Rental expense for operating leases was $65 million for 2014, $41 million for 2013 and $33 million for 2012, which included short term rentals charged to rent expense.  Rental expense includes $7 million related to the Cotai land concession for both 2014 and 2013. The Company accounts for the Cotai land concession contract as an operating lease for which the required upfront payments are amortized over the initial 25-year contract term. Rent recognized for the Cotai land concession is included in “Preopening and start-up expenses” prior to opening.
	In April 2013, the Company entered into a ground lease agreement for an approximate 23 acre parcel of land in connection with the MGM National Harbor project.  The ground lease has an initial term of 25 years and the right to extend for up to 13 additional six year periods with the first 7 of those additional periods considered to be reasonably assured. The Company therefore amortizes the lease on a straight line basis over a 67 year term.  The ground lease will be accounted for as an operating lease with rental expense of $13 million recorded in 2014. Rent recognized for the ground lease is included in "Preopening and start-up expenses" prior to opening.
	Cotai land concession contract.  MGM Grand Paradise’s land concession contract for an approximate 18 acre site in Cotai, Macau became effective on January 9, 2013 and has an initial term of 25 years. The total land premium payable to the Macau government for the land concession contract is $161 million and is composed of a down payment and eight additional semi-annual payments. As of December 31, 2014, MGM China had paid $100 million of the contract premium, including interest due on the semi-annual payments, and the amount paid is recorded within “Other long-term assets, net.” In January 2015, MGM China paid the fourth semi-annual payment of $15 million under the land concession contract. Including interest on the four remaining semi-annual payments, MGM China has approximately $59 million remaining payable for the land concession contract.  Under the terms of the land concession contract, MGM Grand Paradise is required to complete the development of the land by January 2018.
	CityCenter construction litigation. In March 2010, Perini Building Company, Inc. (“Perini”), general contractor for CityCenter, filed a lawsuit in the Eighth Judicial District Court for Clark County, State of Nevada, against MGM MIRAGE Design Group (a wholly owned subsidiary of the Company which was the original party to the Perini construction agreement) and certain direct or indirect subsidiaries of CityCenter Holdings, LLC (the “CityCenter Owners”). Perini asserted, among other things, that CityCenter was substantially completed, but the defendants failed to pay Perini approximately $490 million allegedly due and owing under the construction agreement for labor, equipment and materials expended on CityCenter.
	In April 2010, Perini served an amended complaint in this case which joined as defendants many owners of CityCenter residential condominium units (the “Condo Owner Defendants”), added a count for foreclosure of Perini's recorded master mechanic’s lien against the CityCenter property in the amount of approximately $491 million, and asserted the priority of this mechanic’s lien over the interests of the CityCenter Owners, the Condo Owner Defendants and CityCenter lenders in the CityCenter property.  In November 2012, Perini filed a second amended complaint which, among other things, added claims against the CityCenter defendants of breach of contract (alleging that CityCenter’s Owner Controlled Insurance Program (“OCIP”) failed to provide adequate project insurance for Perini with broad coverages and high limits), and tortious breach of the implied covenant of good faith and fair dealing (alleging improper administration by CityCenter of the OCIP and Builders Risk insurance programs). Prior to the Final Settlement, as defined below, CityCenter settled the claims of 219 first-tier Perini subcontractors (including the claims of any lower-tier subcontractors that might have claims through those first-tier subcontractors). As a result of these settlement agreements and the prior settlement agreements between Perini and CityCenter, most but not all of the components of Perini’s non-Harmon-related lien claim against CityCenter were resolved. On February 24, 2014, Perini filed a revised lien for $174 million as the amount claimed by Perini and the remaining Harmon-related subcontractors.
	During 2013, CityCenter reached a settlement agreement with certain professional service providers against whom it had asserted claims in this litigation for errors or omissions with respect to the CityCenter project, and relevant insurers.  This settlement was approved by the court and CityCenter received proceeds of $38 million in 2014 related to both the Harmon and other components of the CityCenter project.
	In 2014, CityCenter reached a settlement with builder’s risk insurers of a claim relating to damage alleged at the Harmon and received proceeds of $55 million.
	In December 2014, the Perini matter was  concluded through a global settlement among the Company, CityCenter, Perini, the remaining subcontractors, including those implicated in the Harmon work (and their affiliates), and relevant insurers, which followed the previously disclosed settlement agreements and an extra-judicial program for settlement of certain project subcontractor claims. This global settlement concluded all outstanding claims in the case (the “Final Settlement”). The effectiveness of the global settlement was made contingent upon CityCenter’s execution of certain indemnity and release agreements (which were executed in January 2015) and CityCenter’s procurement of replacement general liability insurance covering construction of the CityCenter development (which was obtained in January 2015).
	The Final Settlement, together with previous settlement agreements relating to the non-Harmon related lien claims, resolved all of Perini’s and the remaining subcontractors’ lien claims against CityCenter, MGM Resorts International Design (formerly known as MGM MIRAGE Design Group), certain direct or indirect subsidiaries of CityCenter, and the Condo Owner Defendants. However,  CityCenter expressly reserved any claims for latent or hidden defects as to any portion of CityCenter’s original construction (other than the Harmon) not known to CityCenter at the time of the agreement. The Company and CityCenter entered into the Final Settlement solely as a compromise and settlement and not in any way as an admission of liability or fault.
	The key terms of the Final Settlement included:
	With respect to its non-Harmon lien claims, Perini waived a specific portion of its lien claim against CityCenter, which combined with the prior non-Harmon agreement and accrued interest resulted in a total CityCenter payment to Perini of $153 million, approximately $14 million of which was paid in December 2014. The total payment to Perini was funded by the Company under the Company’s completion guarantee and included the application of approximately $58 million of condominium proceeds that were previously held in escrow by CityCenter to fund construction lien claims upon final resolution of the Perini litigation.
	CityCenter’s recovery for its Harmon construction defect claims, when added to the Harmon-related proceeds from prior insurance settlements of $85 million, resulted in gross cash settlement proceeds to CityCenter of approximately $191 million (of which approximately $18 million was paid by the Company under the completion guarantee in February 2015).
	In conjunction with the Final Settlement, the Company and an insurer participating in the OCIP resolved their arbitration dispute concerning such insurer’s claim for payments it made under the OCIP general liability coverage for contractor costs incurred in the Harmon litigation, premium adjustments and certain other costs and expenses. The Company settled this dispute for $38 million and funded the majority of such amounts under the completion guarantee in January 2015. In addition, the settlement requires future payments equivalent to fifty percent of any additional contractor costs paid by such insurer after November 30, 2014 in connection with the Harmon litigation, and claims handling fees, which the Company does not expect to be significant. This agreement also provided for specified reductions in the letters of credit the Company posted as collateral to secure the payment of its obligations under the disputed coverage agreements.
	Please see below for further discussion on the Company’s completion guarantee obligation.
	CityCenter completion guarantee.  In October 2013, the Company entered into a third amended and restated completion and cost overrun guarantee, which is collateralized by substantially all of the assets of Circus Circus Las Vegas, as well as certain land adjacent to that property. The terms of the amended and restated completion guarantee provide CityCenter the ability to utilize up to $72 million of net residential proceeds to fund construction costs, or to reimburse the Company for construction costs previously expended. As of December 31, 2014, CityCenter was holding approximately $58 million in a separate bank account representing the remaining condominium proceeds available to fund completion guarantee obligations. In February 2015, such amounts were used to fund a portion of the amount paid to Perini in conjunction with the Perini Settlement Agreement discussed above.
	As of December 31, 2014, the Company has funded $747 million under the completion guarantee.  The Company  has accrued a liability of $149 million, which includes amounts yet to be paid as of December 31, 2014, in connection with the resolution of the Perini litigation and related settlement agreements discussed above as well as CityCenter’s associated legal costs. The Company’s estimated obligation was offset by the $58 million of condominium proceeds received and held by CityCenter as of December 31, 2014. The Company does not believe it is reasonably possible it will be liable for amounts in excess of what it has accrued under the completion guarantee.  Subsequent to December 31, 2014, the Company funded $130 million to City Center to cover completion guarantee obligations.
	Harmon demolition. As discussed above, a global settlement was reached in the Perini/CityCenter litigation in December 2014, which finally resolved all outstanding liens, claims and counterclaims between the Company and CityCenter and related parties on one hand and Perini, the remaining subcontractors and remaining insurers on the other hand.  Among the matters resolved were CityCenter’s claims against Perini and other contractors and subcontractors with respect to construction at the Harmon. Pursuant to leave of court in 2014 CityCenter commenced demolition of the building. Based on current estimates, which are subject to change, CityCenter believes the demolition of the Harmon will cost approximately $32 million and is currently underway. The Company does not believe it would be responsible for funding any additional remediation efforts under the completion guarantee that might be required with respect to the Harmon.
	Las Vegas Arena. In conjunction with the Las Vegas Arena Company’s senior secured credit facility, the Company and AEG each entered joint and several unlimited completion guarantees for the project, as well as a repayment guarantee for the term loan B. Additionally, in conjunction with the senior secured credit facility, the Company and AEG have pledged to contribute a total of $175 million for construction, of which $76 million has been contributed as of December 2014.
	Other guarantees.  The Company is party to various guarantee contracts in the normal course of business, which are generally supported by letters of credit issued by financial institutions. The Company’s senior credit facility limits the amount of letters of credit that can be issued to $500 million, and the amount of available borrowings under the senior credit facility is reduced by any outstanding letters of credit.  At December 31, 2014, the Company had provided $91 million of total letters of credit, $55 million of which represents an arbitration order for interim collateral related to the CityCenter project OCIP discussed above under “CityCenter completion guarantee.” In 2015, the Company reduced the interim collateral letter of credit by $31 million, as permitted under the arbitration settlement discussed above. MGM Grand Paradise’s senior credit facility limits the amount of letters of credit that can be issued to $100 million, and the amount of available borrowings under the senior credit facility is reduced by any outstanding letters of credit.  At December 31, 2014 MGM China had provided approximately $39 million of guarantees under its credit facility.
	In connection with the development of MGM Springfield as discussed in Note 1, the Company was required to either deposit 10% of the total investment proposed in the license application into an interest-bearing account, or secure a deposit bond insuring that 10% of the proposed capital investment shall be forfeited to the Commonwealth of Massachusetts if the Company’s subsidiary is unable to complete the gaming establishment.  As a result, the Company obtained a surety bond for approximately $52 million during the fourth quarter of 2014 naming the Commonwealth of Massachusetts as beneficiary.
	Other litigation.  The Company is a party to various legal proceedings, most of which relate to routine matters incidental to its business.  Management does not believe that the outcome of such proceedings will have a material adverse effect on the Company’s financial position, results of operations or cash flows.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Stockholders' Equity	NOTE 12 — STOCKHOLDERS’ EQUITY
	Stock repurchases.  Share repurchases are only conducted under repurchase programs approved by the Board of Directors and publicly announced.  In April 2014, the Company terminated the May 2008 Stock Repurchase Program. The Company did not repurchase any shares of the Company’s common stock prior to the termination of the May 2008 Stock Repurchase Program during 2014, 2013 or 2012.
	MGM China dividend. MGM China paid a $137 million interim dividend in September 2014, of which $70 million remained within the consolidated entity and $67 million was distributed to noncontrolling interests, a $127 million final dividend in June 2014, of which $65 million remained within the consolidated entity and $62 million was distributed to noncontrolling interests, and a $499 million special dividend in March 2014, of which $254 million remained within the consolidated entity and $245 million was distributed to noncontrolling interests.
	MGM China paid a $113 million interim dividend in September 2013, of which $58 million remained within the consolidated entity and $55 million was distributed to noncontrolling interests, and a $500 million special dividend in March 2013, of which $255 million remained within the consolidated entity and $245 million was distributed to noncontrolling interests.
	In February 2015, MGM China’s Board of Directors announced a special dividend of approximately $400 million, of which $204 million will remain within the consolidated entity. In addition, in February 2015, MGM China’s Board of Directors recommended a final dividend for 2014 of approximately $120 million, subject to approval at the 2015 annual shareholder meeting. If approved, the Company will receive $61 million, its 51% share of this dividend.

StockBased_Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	NOTE 13 — STOCK-BASED COMPENSATION
	2005 Omnibus Incentive Plan.  The Company’s omnibus incentive plan, as amended (the “Omnibus Plan”), allows it to grant stock options, stock appreciation rights (“SARs”), restricted stock units (“RSUs”), performance share units (“PSUs”) and other stock-based awards to eligible directors, officers and employees of the Company and its subsidiaries. The Omnibus Plan is administered by the Compensation Committee (the “Committee”) of the Board of Directors. The Committee has discretion under the Omnibus Plan regarding which type of awards to grant, the vesting and service requirements, exercise price and other conditions, in all cases subject to certain limits, including:
	·	As amended, the Omnibus Plan allows for the issuance of up to 45 million shares or share-based awards; and
	·	For stock options and SARs, the exercise price of the award must be at least equal to the fair market value of the stock on the date of grant and the maximum term of such an award is 10 years.
	SARs granted under the Omnibus Plan generally have terms of seven years, and in most cases vest in four equal annual installments. RSUs granted vest ratably over four years, a portion of which are subject to achievement of a performance target based on operational results compared to budget in order for such RSUs to be eligible to vest. Expense is recognized primarily on a straight-line basis over the vesting period of the awards net of estimated forfeitures. Estimated forfeitures are updated periodically with actual forfeitures recognized currently to the extent they differ from the estimate.
	PSUs granted vest subject to a market condition, in which a percentage of the target award granted vests based on the performance of the Company’s stock price in relation to the target price at the end of a three year performance period.  Specifically, the ending average stock price must equal the target price, which is defined as 125% of the beginning average stock price, in order for the target award to vest.  No shares are issued unless the ending average stock price is at least 60% of the target price, and the maximum payout is capped at 160% of the target award.  If the ending average stock price is at least 60% or more of the target price, then the amount of units granted in the target award is multiplied by the stock performance multiplier.  The stock performance multiplier equals the ending average stock price divided by the target price.  For this purpose, the target and ending prices are based on the average closing price of the Company’s common stock over the 60 calendar day periods ending on the grant date and the third anniversary of the grant date.  Expense is recognized on a graded basis over the performance period beginning on the date of grant. Estimated forfeitures are updated periodically with actual forfeitures recognized currently to the extent they differ from the estimate.
	As of December 31, 2014, the Company had an aggregate of approximately 23 million shares of common stock available for grant as share-based awards under the Omnibus Plan.  A summary of activity under the Company’s share-based payment plans for the year ended December 31, 2014 is presented below:
	Stock options and stock appreciation rights
											Weighted
							Weighted				Average				Aggregate
							Average				Remaining				Intrinsic
			Units				Exercise				Contractual				Value
			(000’s)				Price				Term				(000’s)
	Outstanding at January 1, 2014			16,074			$	15.22
	Granted			2,385				22.29
	Exercised			(1,837	)			14.68
	Forfeited or expired			(446	)			48.95
	Outstanding at December 31, 2014			16,176				15.27				3.53			$	121,194
	Vested and expected to vest at December 31, 2014			15,796				15.14				3.47			$	120,676
	Exercisable at December 31, 2014			10,750				14.1				2.43			$	98,485
	As of December 31, 2014, there was a total of $34 million of unamortized compensation related to stock options and SARs expected to vest, which is expected to be recognized over a weighted-average period of 1.7 years.
	Restricted stock units and performance share units
			RSUs								PSUs
							Weighted								Weighted		Weighted
							Average								Average		Average
			Units				Grant-Date				Units				Grant-Date		Target
			(000’s)				Fair Value				(000’s)				Fair Value		Price
	Nonvested at January 1, 2014			1,339			$	13.85				1,055			$	13.91	$	16.95
	Granted			603				22.51				400				18.39		29.8
	Vested			(552	)			12.39				-				-		-
	Forfeited			(32	)			14.73				-				-		-
	Nonvested at December 31, 2014			1,358				18.27				1,455				15.14		20.48
	As of December 31, 2014, there was a total of $20 million of unamortized compensation related to RSUs which is expected to be recognized over a weighted-average period of 1.7 years.
	The Company grants PSUs for the portion of any calculated bonus for a Section 16 officer of the Company that is in excess of such officer’s base salary (the “Bonus PSU Policy”). Awards granted under the Bonus PSU Policy have the same terms as the other PSUs granted under the Omnibus Plan with the exception that as of the grant date the awards will not be subject to forfeiture in the event of the officer’s termination. In March 2014, the Company granted 0.3 million PSUs pursuant to the Bonus PSU Policy with a target price of $31.72. Such awards are excluded from the table above.  As of December 31, 2014, there was a total of $12 million of unamortized compensation related to PSUs which is expected to be recognized over a weighted-average period of 1.6 years.
	The following table includes additional information related to stock options, SARs and RSUs:
					Year Ended December 31,
					2014				2013				2012
					(In thousands)
	Intrinsic value of share-based awards exercised or RSUs vested				$	31,613			$	28,880			$	6,451
	Income tax benefit from share-based awards exercised or					10,805				9,975				2,236
	RSUs vested
	The Company net settles stock option and SAR exercises, whereby shares of common stock are issued equivalent to the intrinsic value of the option or SAR less applicable taxes.
	MGM China Share Option Plan.  The Company’s subsidiary, MGM China, adopted an equity award plan in 2011 for grants of stock options to purchase ordinary shares of MGM China to eligible directors, employees and non-employees of MGM China and its subsidiaries (“MGM China Plan”).  The MGM China Plan is administered by MGM China’s Board of Directors, which has the discretion to determine the exercise price and term of the award, as well as other conditions, in all cases subject to certain limits, including:
	·	The maximum number of shares which may be issued upon exercise of all options to be granted under the MGM China Plan shall not in aggregate exceed 10% of the total number of shares in issue as of the date of the shareholders’ approval of the MGM China Plan; and
	·	The exercise price of the award must be the higher of the closing price of the stock on the offer date, or the average of the closing price for the five business days immediately preceding the offer date, and the maximum term of the award must not exceed ten years.
	Stock options currently granted under the MGM China Plan have a term of ten years, and vest in four equal annual installments.  Expense is recognized on a straight-line basis over the vesting period of the awards net of estimated forfeitures.  Forfeitures are estimated at the time of grant, with such estimate updated periodically and with actual forfeitures recognized currently to the extent they differ from the estimate.
	As of December 31, 2014, MGM China had an aggregate of approximately 339 million shares of options available for grant as share-based awards. A summary of activity under the MGM China Plan for the year ended December 31, 2014 is presented below:
	Stock options
											Weighted
							Weighted				Average				Aggregate
							Average				Remaining				Intrinsic
			Units				Exercise				Contractual				Value
			(000’s)				Price				Term				(000’s)
	Outstanding at January 1, 2014			16,916			$	2.06
	Granted			19,920				3.47
	Exercised			(988	)			1.98
	Forfeited or expired			(790	)			2.67
	Outstanding at December 31, 2014			35,058				2.85				8.15			$	8,084
	Vested and expected to vest at December 31, 2014			33,065				2.82				8.08			$	8,022
	Exercisable at December 31, 2014			10,223				2.02				6.41			$	5,506
	As of December 31, 2014, there was a total of $19 million of unamortized compensation related to stock options expected to vest, which is expected to be recognized over a weighted-average period of 3.0 years.
	The intrinsic value of share-based awards exercised during the year ended December 31, 2014 was $2 million.  When shares of common stock are issued pursuant to the exercise of share-based awards, MGM China repurchases and cancels an equivalent number of shares.  For the year ended December 31, 2014, MGM China received proceeds of $2 million related to the exercise of share-based awards and expended $3 million to repurchase common stock for cancelation.
	Recognition of compensation cost. Compensation cost for both the Omnibus Plan and MGM China Plan was recognized as follows:
			Year Ended December 31,
		2014				2013				2012
Compensation cost:		(In thousands)
Omnibus Plan		$	29,662			$	27,201			$	37,588
MGM China Plan			8,706				6,221				5,840
Total compensation cost			38,368				33,422				43,428
Less:  Reimbursed costs and other			(1,104	)			(1,090	)			(3,868	)
Compensation cost recognized as expense			37,264				32,332				39,560
Less:  Related tax benefit			(9,822	)			-				(1,660	)
Compensation expense, net of tax benefit		$	27,442			$	32,332			$	37,900
Compensation cost for SARs granted under the Omnibus Plan is based on the fair value of each award, measured by applying the Black-Scholes model on the date of grant, using the following weighted-average assumptions:
				Year Ended December 31,
				2014				2013				2012
Expected volatility					40	%			54	%			65	%
Expected term					4.9 yrs.				4.9 yrs.				5.0 yrs.
Expected dividend yield					0	%			0	%			0	%
Risk-free interest rate					1.6	%			1.6	%			0.7	%
Weighted-average fair value of SARs granted				$	8.18			$	9.44			$	5.6
Expected volatility is based in part on historical volatility and in part on implied volatility based on traded options on the Company’s stock.  The expected term considers the contractual term of the option as well as historical exercise and forfeiture behavior.  The risk-free interest rate is based on the rates in effect on the grant date for U.S. Treasury instruments with maturities matching the relevant expected term of the award.
Compensation cost for PSUs granted under the Omnibus Plan is based on the fair value of each award, measured by applying a Monte Carlo simulation method on the date of grant, using the following weighted-average assumptions:
				Year Ended December 31,
				2014				2013				2012
Expected volatility					31	%			40	%			49	%
Expected term					3.0 yrs.				3.0 yrs.				3.0 yrs.
Expected dividend yield					0	%			0	%			0	%
Risk-free interest rate					1	%			0.6	%			0.4	%
Weighted-average fair value of PSUs granted				$	18.39			$	21.01			$	10.03
Expected volatility is based in part on historical volatility and in part on implied volatility based on traded options on the Company’s stock.  The expected term is equal to the three year performance period.  The risk-free interest rate is based on the rates in effect on the grant date for U.S. Treasury instruments with maturities matching the relevant expected term of the award. The table above excludes assumptions used to value PSUs granted under the Bonus PSU Policy.
Compensation cost for stock options granted under the MGM China Plan is based on the fair value of each award, measured by applying the Black-Scholes model on the date of grant, using the following weighted-average assumptions:
				Year Ended December 31,
				2014				2013				2012
Expected volatility					39	%			46	%			60	%
Expected term					7.9 yrs.				8.0 yrs.				8.0 yrs.
Expected dividend yield					1.6	%			1.2	%			0	%
Risk-free interest rate					1.8	%			1.7	%			2.1	%
Weighted-average fair value of options granted				$	1.06			$	1.39			$	1.13
Expected volatilities are based on a blend of historical volatility from a selection of companies in MGM China’s peer group and historical volatility of MGM China’s stock price.  Expected term considers the contractual term of the option as well as historical exercise behavior of previously granted options.  Dividend yield is based on the estimate of annual dividends expected to be paid at the time of the grant. The risk-free interest rate is based on rates in effect at the valuation date for the Hong Kong Exchange Fund Notes with maturities matching the relevant expected term of the award.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2014
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	NOTE 14 — EMPLOYEE BENEFIT PLANS
	Multiemployer benefit plans.  Employees of the Company who are members of various unions are covered by union-sponsored, collectively bargained, multiemployer health and welfare and defined benefit pension plans.  Of these plans, the Company considers the Southern Nevada Culinary and Bartenders Pension Plan (the “Pension Plan”), under the terms of collective bargaining agreements with the Local Joint Executive Board of Las Vegas for and on behalf of Culinary Workers Union Local No. 226 and Bartenders Union Local No. 165 to be individually significant. The risk of participating in the Pension Plan differs from single-employer plans in the following aspects:
	a)	Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers;
	b)	If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers;
	c)	If an entity chooses to stop participating in some of its multiemployer plans, the entity may be required to pay those plans an amount based on the underfunded status of the plan, referred to as a withdrawal liability;
	d)	If the Pension Plan is terminated by withdrawal of all employers and if the value of the nonforfeitable benefits exceeds plan assets and withdrawal liability payments, employers are required by law to make up the insufficient difference.
	Pursuant to its collective bargaining agreements referenced above, the Company also contributes to UNITE HERE Health (the “Health Fund”), which provides healthcare benefits to its active and retired members. The Company’s participation in the Pension Plan is outlined in the table below.
								Expiration Date
					Pension Protection Act			of Collective
			EIN/Pension		Zone Status (1)			Bargaining
	Pension Fund		Plan Number		2013	2012		Agreements (2)
	Southern Nevada Culinary and		88-6016617/001		Green	Green		11/12/14 - 5/31/18
	Bartenders Pension Plan
	-1	The trustees of the Pension Plan have elected to apply the extended amortization and the special ten year asset smoothing rules under the Pension Relief Act of 2010.
	-2	The Company is party to ten collective bargaining agreements that require contributions to the Pension Plan.  The agreements between CityCenter Hotel Casino, LLC, Bellagio, Mandalay Corp., MGM Grand Hotel, LLC and the Local Joint Executive Board of Las Vegas are the most significant because more than half of the Company’s employee participants in the Pension Plan are covered by those four agreements. The collective bargaining agreement covering approximately 4,300 employees at MGM Grand Las Vegas expired in 2014. The Company has signed an extension of such agreement and is currently negotiating a new agreement.
	Contributions to the Company’s multiemployer pension plans and other multiemployer benefit plans were as follows:
			Year Ended December 31,
			2014			2013			2012
	Multiemployer Pension Plans		(In thousands)
	Southern Nevada Culinary and Bartenders Pension Plan		$	33,927		$	37,691		$	35,556
	Other pension plans not individually significant			7,323			8,280			8,083
	Total multiemployer pension plans		$	41,250		$	45,971		$	43,639
	Multiemployer Benefit Plans Other Than Pensions
	UNITE HERE Health		$	202,641		$	167,494		$	162,453
	Other			12,746			15,367			14,172
	Total multiemployer benefit plans other than pensions		$	215,387		$	182,861		$	176,625
	Contributions to the Pension Plan decreased during 2014 as a result of an amendment to the collective bargaining agreements to temporarily divert contributions from the Pension Plan to the Health Fund. Hours worked in 2013 increased approximately 3% compared to 2012 and the contribution rate to the Pension Plan increased in mid-2012 as defined under the collective bargaining agreements.  Bellagio, Aria, Mandalay Bay and MGM Grand Las Vegas were listed in the Pension Plan’s Forms 5500 as providing more than 5% of the total contributions for the plan years ended December 31, 2013 and 2012. At the date the financial statements were issued, Form 5500 was not available for the plan year ending in 2014.  No surcharges were imposed on the Company’s contributions to any of the plans.
	Self-insurance.  The Company is self-insured for most health care benefits and workers compensation for its non-union employees.  The liability for health care claims filed and estimates of claims incurred but not reported was $20 million and $19 million at December 31, 2014 and 2013, respectively.  The workers compensation liability for claims filed and estimates of claims incurred but not reported was $48 million and $42 million as of December 31, 2014 and 2013, respectively. Both liabilities are included in “Other accrued liabilities.”
	Retirement savings plans.  The Company has retirement savings plans under Section 401(k) of the IRC for eligible employees.  The plans allow employees to defer, within prescribed limits, up to 30% of their income on a pre-tax basis through contributions to the plans.  The Company suspended its matching contributions to the plan in 2009, though certain employees at MGM Grand Detroit and Four Seasons were still eligible for matching contributions.  The Company reinstated a more limited 401(k) company contribution in 2012 and will continue to monitor the plan contributions as the economy changes. In the case of certain union employees, the Company contributions to the plan are based on hours worked.  The Company recorded charges for 401(k) contributions of $17 million, $13 million and $12 million in 2014, 2013 and 2012, respectively.
	The Company maintains nonqualified deferred retirement plans for certain key employees.  The plans allow participants to defer, on a pre-tax basis, a portion of their salary and bonus and accumulate tax deferred earnings, plus investment earnings on the deferred balances, as a deferred tax savings.  All employee deferrals vest immediately.  In 2009, the Company suspended contributions to the plan.
	The Company also maintains nonqualified supplemental executive retirement plans (“SERP”) for certain key employees.  Until September 2008, the Company made quarterly contributions intended to provide a retirement benefit that is a fixed percentage of a participant’s estimated final five-year average annual salary, up to a maximum of 65%.  The Company has indefinitely suspended these contributions.  Employees do not make contributions under these plans.  A portion of the Company contributions and investment earnings thereon vest after three years of SERP participation and the remaining portion vests after both five years of SERP participation and 10 years of continuous service.
	MGM China. MGM China contributes to a retirement plan as part of an employee benefits package for eligible employees.  Contributions to the retirement plan were $5 million, $5 million and $4 million for the years ended December 31, 2014, 2013, and 2012, respectively.

Property_Transactions_Net

Property Transactions, Net	12 Months Ended
	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Property Transactions, Net	NOTE 15 — PROPERTY TRANSACTIONS, NET
	Property transactions, net consisted of the following:
		Year Ended December 31,
		2014		2013		2012
		(In thousands)
	Grand Victoria investment impairment	$	28,789	$	36,607	$	85,009
	Corporate buildings impairment		-		44,510		-
	Other Nevada land impairment		-		20,354		-
	Borgata investment impairment		-		-		53,757
	Las Vegas Strip land impairment		-		-		366,406
	Atlantic City land impairment		-		-		166,569
	Other property transactions, net		12,213		23,290		25,065
		$	41,002	$	124,761	$	696,806
	Grand Victoria Investment. See Note 6 for additional information related to the Grand Victoria investment impairment charges.
	Corporate Buildings.  During the second quarter of 2013, the Company recorded an impairment charge of $45 million related to corporate buildings which were removed from service in connection with the Las Vegas Arena project, of which the Company owns 50%, that is located on the land previously occupied by these buildings.
	Other Nevada Land. The Company owns approximately 170 acres of land in Jean, Nevada and owned approximately 89 acres in and around Sloan, Nevada.  In 2013, the Company recorded an impairment charge of $20 million based on an estimated fair value of $24 million, due to an increased probability of sale in which the Company did not believe it was likely that the carrying value of the land would be recovered.  Fair value was determined based on recent indications from market participants. In the fourth quarter of 2013, the Company sold the Sloan land.
	Borgata. See Note 6 for additional information related to the Borgata investment impairment charge.
	Las Vegas Strip land.  The Company owns 33.5 acres on the north end of the Las Vegas Strip, which it has been holding for future development. During 2012, the Company focused its development efforts on other jurisdictions, which led it to review its significant development land holdings for impairment indicators. Due to the Company’s focus on future development outside of the Las Vegas area, it did not believe it was likely it would recover the carrying value of its 33.5 acres of land on the north end of the Las Vegas Strip on an undiscounted basis. Therefore, the Company recorded an impairment charge of $366 million as of December 31, 2012 based on an estimated fair value of $214 million for the land. The Company determined fair value of the land using a market approach based on an assessment of comparable land sales in Las Vegas, adjusted for size and location factors based on comparisons to its land.
	Atlantic City land.  The Company owns two sites for a total of approximately 86 acres in Atlantic City, which it has been holding for future development.  The Company recorded an impairment charge of $167 million as of December 31, 2012 based on an estimated fair value of $125 million for the land.  Due to the Company’s focus on future development outside of Atlantic City, the deterioration the Atlantic City market had experienced and the initial underperformance of a new resort that opened in 2012, it did not believe it was likely it would recover the carrying value of this land on an undiscounted basis. The Company determined fair value of the land using a market approach based on assessment of comparable land sales in Atlantic City, adjusted for size and location factors based on comparisons to its land.
	Other. Other property transactions, net in 2014 and 2013 include miscellaneous asset disposals and demolition costs. Other property transactions, net in 2012 include write-downs related to the remodeling of the theatre at Mandalay Bay, the renovation of the IMAX theatre at Luxor and various other miscellaneous asset disposals and disposal costs.

Segment_Information

Segment Information	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Information	NOTE 16 — SEGMENT INFORMATION
	The Company’s management views each of its casino resorts as an operating segment.  Operating segments are aggregated based on their similar economic characteristics, types of customers, types of services and products provided, the regulatory environments in which they operate, and their management and reporting structure.  The Company’s principal operating activities occur in two geographic regions: the United States and Macau S.A.R.  The Company has aggregated its operations into two reportable segments based on the similar characteristics of the operating segments within the regions in which they operate: wholly owned domestic resorts and MGM China. The Company’s operations related to investments in unconsolidated affiliates, MGM Hospitality, and certain other corporate and management operations have not been identified as separate reportable segments; therefore, these operations are included in corporate and other in the following segment disclosures to reconcile to consolidated results.
	The Company’s management utilizes Adjusted Property EBITDA as the primary profit measure for its reportable segments. Adjusted Property EBITDA is a measure defined as Adjusted EBITDA before corporate expense and stock compensation expense related to the Omnibus Plan, which are not allocated to the reportable segments. MGM China recognizes stock compensation expense related to the MGM China Plan which is included in the calculation of Adjusted EBITDA for MGM China. Adjusted EBITDA is a measure defined as earnings before interest and other non-operating income (expense), taxes, depreciation and amortization, preopening and start-up expenses, property transactions, net.
	The following tables present the Company’s segment information:
		Year Ended December 31,
		2014			2013			2012
		(In thousands)
	Net Revenues
	Wholly owned domestic resorts	$	6,342,084		$	6,052,644		$	5,932,791
	MGM China		3,282,329			3,316,928			2,807,676
	Reportable segment net revenues		9,624,413			9,369,572			8,740,467
	Corporate and other		457,571			440,091			420,377
		$	10,081,984		$	9,809,663		$	9,160,844
	Adjusted Property EBITDA
	Wholly owned domestic resorts	$	1,518,307		$	1,442,686		$	1,325,220
	MGM China		850,471			814,109			679,345
	Reportable segment Adjusted Property EBITDA		2,368,778			2,256,795			2,004,565
	Other operating expense
	Corporate and other, net		(149,216	)		(132,214	)		(256,584	)
	Preopening and start-up expenses		(39,257	)		(13,314	)		(2,127	)
	Property transactions, net		(41,002	)		(124,761	)		(696,806	)
	Depreciation and amortization		(815,765	)		(849,225	)		(927,697	)
	Operating income		1,323,538			1,137,281			121,351
	Non-operating income (expense)
	Interest expense, net of amounts capitalized		(817,061	)		(857,347	)		(1,116,358	)
	Non-operating items from unconsolidated affiliates		(87,794	)		(208,682	)		(130,845	)
	Other, net		(7,797	)		(9,062	)		(608,361	)
			(912,652	)		(1,075,091	)		(1,855,564	)
	Income (loss) before income taxes		410,886			62,190			(1,734,213	)
	Benefit (provision) for income taxes		(283,708	)		(20,816	)		117,301
	Net income (loss)		127,178			41,374			(1,616,912	)
	Less: Net income attributable to noncontrolling interests		(277,051	)		(213,108	)		(150,779	)
	Net loss attributable to MGM Resorts International	$	(149,873	)	$	(171,734	)	$	(1,767,691	)
		December 31,
		2014			2013
	Total assets:	(In thousands)
	Wholly owned domestic resorts	$	13,336,737		$	13,151,719
	MGM China		8,842,949			9,203,742
	Reportable segment total assets		22,179,686			22,355,461
	Corporate and other		4,545,448			3,750,839
	Eliminated in consolidation		(22,623	)		(21,690	)
		$	26,702,511		$	26,084,610
		December 31,
		2014			2013
	Property and equipment, net:	(In thousands)
	Wholly owned domestic resorts	$	11,933,559		$	11,787,880
	MGM China		1,323,432			957,769
	Reportable segment property and equipment, net		13,256,991			12,745,649
	Corporate and other		1,207,174			1,331,253
	Eliminated in consolidation		(22,623	)		(21,690	)
		$	14,441,542		$	14,055,212
		Year Ended December 31,
		2014			2013			2012
	Capital expenditures:	(In thousands)
	Wholly owned domestic resorts	$	292,463		$	216,147		$	258,519
	MGM China		347,338			254,516			80,018
	Reportable segment capital expenditures		639,801			470,663			338,537
	Corporate and other		233,173			107,442			89,935
	Eliminated in consolidation		(933	)		(15,981	)		(5,709	)
		$	872,041		$	562,124		$	422,763

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 17 — RELATED PARTY TRANSACTIONS
	CityCenter
	Management agreements. The Company and CityCenter have entered into agreements whereby the Company is responsible for management of the operations of CityCenter for a fee of 2% of revenue and 5% of EBITDA (as defined) for Aria and Vdara and $3 million per year for Crystals.  The Company earned fees of $38 million, $38 million and $32 million for the years ended December 31, 2014, 2013 and 2012.  The Company is being reimbursed for certain costs in performing its development and management services.  During the years ended December 31, 2014, 2013 and 2012 the Company incurred $380 million, $364 million and $355 million, respectively, of costs reimbursable by CityCenter, primarily for employee compensation and certain allocated costs.  As of December 31, 2014 and 2013, CityCenter owed the Company $45 million and $49 million, respectively, for management services and reimbursable costs.
	Other agreements. The Company entered into an agreement with CityCenter whereby the Company provides CityCenter the use of its aircraft on a time sharing basis.  CityCenter is charged a rate that is based on Federal Aviation Administration regulations, which provides for reimbursement for specific costs incurred by the Company.  During each of the years ended December 31, 2014, 2013 and 2012, the Company was reimbursed $3 million for aircraft related expenses.  The Company has certain other arrangements with CityCenter for the provision of certain shared services, reimbursement of costs and other transactions undertaken in the ordinary course of business.
	MGM China
	Ms. Pansy Ho is member of the Board of Directors of, and holds a minority ownership interest in, MGM China.  Ms. Pansy Ho is also the managing director of Shun Tak Holdings Limited (together with its subsidiaries “Shun Tak”), a leading conglomerate in Hong Kong with core businesses in transportation, property, hospitality and investments.  Shun Tak provides various services and products, including ferry tickets, travel products, rental of hotel rooms, laundry services, advertising services and property cleaning services to MGM China  and MGM China provides rental of hotel rooms at wholesale room rates to Shun Tak and receives rebates for ferry tickets from Shun Tak. MGM China incurred expenses of $28 million, $18 million and $13 million for the years ended December 31, 2014, 2013 and 2012, respectively.  MGM China recorded revenue of less than $1 million related to hotel rooms provided to Shun Tak for the years ended December 31, 2014, 2013 and 2012, respectively. As of December 31, 2014 and 2013, MGM China did not have a material payable to or receivable from Shun Tak.
	MGM Branding and Development Holdings, Ltd., (together with its subsidiary MGM Development Services, Ltd, “MGM Branding and Development”), an entity included in the Company’s consolidated financial statements in which Ms. Pansy Ho indirectly holds a noncontrolling interest, entered into a brand license agreement with MGM China.  MGM China pays a license fee to MGM Branding and Development equal to 1.75% of MGM China’s consolidated net revenue, subject to an annual cap of $43 million with a 20% increase per annum for each subsequent calendar year during the term of the agreement. During the years ended December 31, 2014, 2013 and 2012, MGM China incurred total license fees of $43 million, $36 million and $30 million, respectively, equal to the cap for each annual period. Such amounts have been eliminated in consolidation.
	MGM China entered into a development services agreement with MGM Branding and Development to provide certain development services to MGM China in connection with future expansion of existing projects and development of future resort gaming projects. Such services are subject to a development fee which is calculated separately for each resort casino property upon commencement of development. For each such property, the fee is 2.625% of project costs, to be paid in installments as certain benchmarks are achieved. Project costs are the total costs incurred for the design, development and construction of the casino, casino hotel, integrated resort and other related sites associated with each project, including costs of construction, fixtures and fittings, signage, gaming and other supplies and equipment and all costs associated with the opening of the business to be conducted at each project but excluding the cost of land and gaming concessions and financing costs. The development fee is subject to an annual cap of $24 million in 2014, which will increase by 10% per annum for each year during the term of the agreement. For the years ended December 31, 2013 and 2012, MGM China incurred $15 million and $6 million of fees, respectively, to MGM Branding and Development related to development services. Such amount is eliminated in consolidation. No fee was paid for the year ended December 31, 2014.
	An entity owned by Ms. Pansy Ho received distributions of $13 million, $18 million and $11 million during the years ended December 31, 2014, 2013 and 2012, respectively, in connection with the ownership of a noncontrolling interest in MGM Branding and Development Holdings, Ltd.
	Las Vegas Arena
	The Las Vegas Arena Company leases the land underlying the Las Vegas Arena from the Company under a 50 year operating lease, which commences upon the opening of the Arena. In conjunction with Las Vegas Arena Company obtaining financing and beginning construction in 2014, the Company began accruing rental income. During 2014, the Company recorded accrued income of $1 million for the Las Vegas Arena ground lease.

Consolidating_Condensed_Financ

Consolidating Condensed Financial Information	12 Months Ended
	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Consolidating Condensed Financial Information	NOTE 18 — CONSOLIDATING CONDENSED FINANCIAL INFORMATION
	The Company’s domestic subsidiaries, excluding certain minor subsidiaries, its domestic insurance subsidiaries, MGM Grand Detroit, LLC, MGM National Harbor, LLC and Blue Tarp reDevelopment, LLC (the company that will own and operate the Company’s proposed casino in Springfield, Massachusetts), and each of their respective subsidiaries, have fully and unconditionally guaranteed, on a joint and several basis, payment of the senior credit facility and the outstanding debt securities.  The Company’s international subsidiaries, including MGM China, are not guarantors of such indebtedness. Separate condensed financial statement information for the subsidiary guarantors and non-guarantors as of December 31, 2014 and 2013 and for the years ended December 31, 2014, 2013 and 2012, are presented below.  Within the Condensed Consolidating Statements of Cash Flows for the period ending December 31, 2014, the Company has presented net changes in intercompany accounts as investing activities if the applicable entities have a net asset in intercompany accounts, and as a financing activity if the applicable entities have a net intercompany liability balance.
	CONDENSED CONSOLIDATING BALANCE SHEET INFORMATION
		31-Dec-14
		Parent			Guarantor			Non-			Elimination			Consolidated
					Subsidiaries			Guarantor
								Subsidiaries
		(In thousands)
	Current assets	$	1,390,806		$	868,688		$	768,335		$	(669	)	$	3,027,160
	Property and equipment, net		-			12,445,086			2,008,428			(11,972	)		14,441,542
	Investments in subsidiaries		20,430,160			3,896,365			-			(24,326,525	)		-
	Investments in and advances to unconsolidated affiliates		-			1,526,446			7,588			25,000			1,559,034
	Intercompany accounts		-			2,175,091			-			(2,175,091	)		-
	Other non-current assets		141,035			414,801			7,118,939			-			7,674,775
		$	21,962,001		$	21,326,477		$	9,903,290		$	(26,489,257	)	$	26,702,511
	Current liabilities	$	1,680,319		$	953,179		$	775,097		$	(670	)	$	3,407,925
	Intercompany accounts		1,932,780			-			242,311			(2,175,091	)		-
	Deferred income taxes		2,312,828			-			309,032			-			2,621,860
	Long-term debt		11,907,534			4,837			1,001,511			-			12,913,882
	Other long-term obligations		37,623			58,016			34,931			-			130,570
	Total liabilities		17,871,084			1,016,032			2,362,882			(2,175,761	)		19,074,237
	MGM Resorts stockholders' equity		4,090,917			20,310,445			4,003,051			(24,313,496	)		4,090,917
	Noncontrolling interests		-			-			3,537,357			-			3,537,357
	Total stockholders' equity		4,090,917			20,310,445			7,540,408			(24,313,496	)		7,628,274
		$	21,962,001		$	21,326,477		$	9,903,290		$	(26,489,257	)	$	26,702,511
		31-Dec-13
		Parent			Guarantor			Non-			Elimination			Consolidated
					Subsidiaries			Guarantor
								Subsidiaries
		(In thousands)
	Current assets	$	494,296		$	903,537		$	1,322,170		$	(564	)	$	2,719,439
	Property and equipment, net		-			12,552,828			1,514,356			(11,972	)		14,055,212
	Investments in subsidiaries		19,991,695			4,037,168			-			(24,028,863	)		-
	Investments in and advances to unconsolidated affiliates		-			1,461,496			7,765			-			1,469,261
	Other non-current assets		167,552			422,259			7,250,887			-			7,840,698
		$	20,653,543		$	19,377,288		$	10,095,178		$	(24,041,399	)	$	26,084,610
	Current liabilities	$	340,343		$	959,118		$	941,431		$	(25,564	)	$	2,215,328
	Intercompany accounts		1,446,952			(1,470,305	)		23,353			-			-
	Deferred income taxes		2,110,229			-			309,738			-			2,419,967
	Long-term debt		12,441,112			4,836			1,001,282			-			13,447,230
	Other long-term obligations		98,856			41,758			976			-			141,590
	Total liabilities		16,437,492			(464,593	)		2,276,780			(25,564	)		18,224,115
	MGM Resorts stockholders' equity		4,216,051			19,841,881			4,173,954			(24,015,835	)		4,216,051
	Noncontrolling interests		-			-			3,644,444			-			3,644,444
	Total stockholders' equity		4,216,051			19,841,881			7,818,398			(24,015,835	)		7,860,495
		$	20,653,543		$	19,377,288		$	10,095,178		$	(24,041,399	)	$	26,084,610
	CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION
		Year Ended December 31, 2014
		Parent			Guarantor			Non-			Elimination			Consolidated
					Subsidiaries			Guarantor
								Subsidiaries
		(In thousands)
	Net revenues	$	-		$	6,270,708		$	3,813,736		$	(2,460	)	$	10,081,984
	Equity in subsidiaries' earnings		938,712			339,312			-			(1,278,024	)		-
	Expenses
	Casino and hotel operations		5,482			3,810,711			2,554,965			(2,460	)		6,368,698
	General and administrative		4,743			1,089,192			224,814			-			1,318,749
	Corporate expense		72,116			150,938			15,757			-			238,811
	Preopening and start-up expenses		-			5,384			33,873			-			39,257
	Property transactions, net		-			36,612			4,390			-			41,002
	Depreciation and amortization		-			500,401			315,364			-			815,765
			82,341			5,593,238			3,149,163			(2,460	)		8,822,282
	Income from unconsolidated affiliates		-			64,014			(178	)		-			63,836
	Operating income (loss)		856,371			1,080,796			664,395			(1,278,024	)		1,323,538
Interest expense, net of amounts capitalized		(794,826	)		(574	)		(21,661	)		-			(817,061	)
Other, net		50,793			(90,679	)		(55,705	)		-			(95,591	)
Income (loss) before income taxes		112,338			989,543			587,029			(1,278,024	)		410,886
Provision for income taxes		(262,211	)		(20,735	)		(762	)		-			(283,708	)
Net income (loss)		(149,873	)		968,808			586,267			(1,278,024	)		127,178
Less: Net income attributable to noncontrolling interests		-			-			(277,051	)		-			(277,051	)
Net income (loss) attributable to MGM Resorts	$	(149,873	)	$	968,808		$	309,216		$	(1,278,024	)	$	(149,873	)
International
Net income (loss)	$	(149,873	)	$	968,808		$	586,267		$	(1,278,024	)	$	127,178
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		(762	)		(762	)		(1,293	)		1,524			(1,293	)
Other		1,250			1,250			-			(1,250	)		1,250
Other comprehensive income (loss)		488			488			(1,293	)		274			(43	)
Comprehensive income (loss)		(149,385	)		969,296			584,974			(1,277,750	)		127,135
Less: Comprehensive income attributable to		-			-			(276,520	)		-			(276,520	)
noncontrolling interests
Comprehensive income (loss) attributable to	$	(149,385	)	$	969,296		$	308,454		$	(1,277,750	)	$	(149,385	)
MGM Resorts International
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION
	Year Ended December 31, 2014
	Parent			Guarantor			Non-			Elimination			Consolidated
				Subsidiaries			Guarantor
							Subsidiaries
Cash flows from operating activities	(In thousands)
Net cash provided by (used in) operating activities	$	(718,756	)	$	1,121,013		$	703,413		$	25,000		$	1,130,670
Cash flows from investing activities
Capital expenditures, net of construction payable		-			(375,719	)		(496,322	)		-			(872,041	)
Dispositions of property and equipment		-			6,631			1,020			-			7,651
Investments in and advances to		(31,400	)		(46,640	)		-			(25,000	)		(103,040	)
unconsolidated affiliates
Distributions from unconsolidated affiliates		-			132			-			-			132
in excess of earnings
Investments in treasury securities -		-			(123,133	)		-			-			(123,133	)
maturities longer than 90 days
Proceeds from treasury securities -		-			210,300			-			-			210,300
maturities longer than 90 days
Cash deposits - original maturities longer than 90 days		(570,000	)		-			-			-			(570,000	)
Intercompany accounts		-			(704,785	)		-			704,785			-
Payments for gaming licenses		-			-			(85,000	)		-			(85,000	)
Other		-			10,981			-			-			10,981
Net cash provided by (used in) investing activities		(601,400	)		(1,022,233	)		(580,302	)		679,785			(1,524,150	)
Cash flows from financing activities
Net repayments under bank credit facilities -		(28,000	)		-			-			-			(28,000	)
maturities of 90 days or less
Borrowings under bank credit facilities -		3,821,250			-			1,350,000			-			5,171,250
maturities longer than 90 days
Repayments under bank credit facilities -		(3,821,250	)		-			(1,350,000	)		-			(5,171,250	)
maturities longer than 90 days
Issuance of senior notes		1,250,750			-			-			-			1,250,750
Retirement of senior notes		(508,900	)		-			-			-			(508,900	)
Debt issuance costs		(13,681	)		-			-			-			(13,681	)
Intercompany accounts		1,045,048			(76,117	)		(264,146	)		(704,785	)		-
Distributions to noncontrolling interest owners		-			-			(386,709	)		-			(386,709	)
Other		(4,213	)		(803	)		(367	)		-			(5,383	)
Net cash provided by (used in) financing activities		1,741,004			(76,920	)		(651,222	)		(704,785	)		308,077
Effect of exchange rate on cash		-			-			(889	)		-			(889	)
Cash and cash equivalents
Net increase (decrease) for the period		420,848			21,860			(529,000	)		-			(86,292	)
Cash related to assets held for sale		-			(3,662	)		-			-			(3,662	)
Balance, beginning of period		378,660			237,457			1,187,552			-			1,803,669
Balance, end of period	$	799,508		$	255,655		$	658,552		$	-		$	1,713,715
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION
	Year Ended December 31, 2013
	Parent			Guarantor			Non-			Elimination			Consolidated
				Subsidiaries			Guarantor
							Subsidiaries
	(In thousands)
Net revenues	$	-		$	5,955,001		$	3,856,728		$	(2,066	)	$	9,809,663
Equity in subsidiaries' earnings		638,030			289,384			-			(927,414	)		-
Expenses
Casino and hotel operations		5,644			3,622,940			2,632,198			(2,066	)		6,258,716
General and administrative		4,432			1,051,757			222,261			-			1,278,450
Corporate expense		66,307			125,500			41,938			(17,000	)		216,745
Preopening and start-up expenses		-			4,205			9,109			-			13,314
Property transactions, net		-			126,773			(2,012	)		-			124,761
Depreciation and amortization		-			522,900			326,325			-			849,225
		76,383			5,454,075			3,229,819			(19,066	)		8,741,211
Income from unconsolidated affiliates		-			68,807			22			-			68,829
Operating income (loss)		561,647			859,117			626,931			(910,414	)		1,137,281
Interest expense, net of amounts capitalized		(805,933	)		(6,333	)		(45,081	)		-			(857,347	)
Other, net		39,524			(212,065	)		(45,203	)		-			(217,744	)
Income (loss) before income taxes		(204,762	)		640,719			536,647			(910,414	)		62,190
Benefit (provision) for income taxes		33,028			11,111			(64,955	)		-			(20,816	)
Net income (loss)		(171,734	)		651,830			471,692			(910,414	)		41,374
Less: Net income attributable to noncontrolling interests		-			-			(213,108	)		-			(213,108	)
Net income (loss) attributable to MGM Resorts	$	(171,734	)	$	651,830		$	258,584		$	(910,414	)	$	(171,734	)
International
Net income (loss)	$	(171,734	)	$	651,830		$	471,692		$	(910,414	)	$	41,374
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		(1,915	)		(1,915	)		(3,993	)		3,830			(3,993	)
Other		115			115			-			(115	)		115
Other comprehensive income (loss)		(1,800	)		(1,800	)		(3,993	)		3,715			(3,878	)
Comprehensive income (loss)		(173,534	)		650,030			467,699			(906,699	)		37,496
Less: Comprehensive income attributable to		-			-			(211,030	)		-			(211,030	)
noncontrolling interests
Comprehensive income (loss) attributable to	$	(173,534	)	$	650,030		$	256,669		$	(906,699	)	$	(173,534	)
MGM Resorts International
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION
	Year Ended December 31, 2013
	Parent			Guarantor			Non-			Elimination			Consolidated
				Subsidiaries			Guarantor
							Subsidiaries
Cash flows from operating activities	(In thousands)
Net cash provided by (used in) operating activities	$	(819,282	)	$	1,089,341		$	1,040,389		$	-		$	1,310,448
Cash flows from investing activities
Capital expenditures, net of construction payable		-			(311,635	)		(250,489	)		-			(562,124	)
Dispositions of property and equipment		-			11,648			6,382			-			18,030
Investments in and advances to		(23,600	)		(5,353	)		-			-			(28,953	)
unconsolidated affiliates
Distributions from unconsolidated affiliates		-			110			-			-			110
in excess of earnings
Investments in treasury securities -		-			(219,546	)		-			-			(219,546	)
maturities longer than 90 days
Proceeds from treasury securities -		-			252,592			-			-			252,592
maturities longer than 90 days
Payments for gaming licenses		-			-			(21,600	)		-			(21,600	)
Other		-			1,354			-			-			1,354
Net cash used in investing activities		(23,600	)		(270,830	)		(265,707	)		-			(560,137	)
Cash flows from financing activities
Net borrowings under bank credit facilities -		(28,000	)		-			-			-			(28,000	)
maturities of 90 days or less
Borrowings under bank credit facilities -		2,343,000			-			450,000			-			2,793,000
maturities longer than 90 days
Repayments under bank credit facilities -		(2,343,000	)		-			(450,000	)		-			(2,793,000	)
maturities longer than 90 days
Issuance of senior notes		500,000			-			-			-			500,000
Retirement of senior notes		(462,226	)		(150,036	)		-			-			(612,262	)
Debt issuance costs		(23,576	)		-			-			-			(23,576	)
Intercompany accounts		985,465			(657,260	)		(328,205	)		-			-
Distributions to noncontrolling interest owners		-			-			(318,348	)		-			(318,348	)
Other		(4,506	)		-			(3,016	)		-			(7,522	)
Net cash provided by (used in) financing activities		967,157			(807,296	)		(649,569	)		-			(489,708	)
Effect of exchange rate on cash		-			-			(443	)		-			(443	)
Cash and cash equivalents
Net increase for the period		124,275			11,215			124,670			-			260,160
Balance, beginning of period		254,385			226,242			1,062,882			-			1,543,509
Balance, end of period	$	378,660		$	237,457		$	1,187,552		$	-		$	1,803,669
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION
	Year Ended December 31, 2012
	Parent			Guarantor			Non-			Elimination			Consolidated
				Subsidiaries			Guarantor
							Subsidiaries
	(In thousands)
Net revenues	$	-		$	5,782,523		$	3,379,891		$	(1,570	)	$	9,160,844
Equity in subsidiaries' earnings		(210,934	)		220,354			-			(9,420	)		-
Expenses
Casino and hotel operations		7,623			3,615,288			2,299,941			(1,570	)		5,921,282
General and administrative		7,101			1,025,028			207,645			-			1,239,774
Corporate expense		66,285			168,863			7,859			(8,000	)		235,007
Preopening and start-up expenses		-			1,486			641			-			2,127
Property transactions, net		-			693,519			3,287			-			696,806
Depreciation and amortization		-			519,074			408,623			-			927,697
		81,009			6,023,258			2,927,996			(9,570	)		9,022,693
Income from unconsolidated affiliates		-			(16,861	)		61			-			(16,800	)
Operating income (loss)		(291,943	)		(37,242	)		451,956			(1,420	)		121,351
Interest expense, net of amounts capitalized		(1,053,692	)		(10,986	)		(51,680	)		-			(1,116,358	)
Other, net		(526,606	)		(178,026	)		(34,574	)		-			(739,206	)
Income (loss) before income taxes		(1,872,241	)		(226,254	)		365,702			(1,420	)		(1,734,213	)
Benefit for income taxes		104,550			1,892			10,859			-			117,301
Net income (loss)		(1,767,691	)		(224,362	)		376,561			(1,420	)		(1,616,912	)
Less: Net income attributable to noncontrolling interests		-			-			(150,779	)		-			(150,779	)
Net income (loss) attributable to MGM Resorts	$	(1,767,691	)	$	(224,362	)	$	225,782		$	(1,420	)	$	(1,767,691	)
International
Net income (loss)	$	(1,767,691	)	$	(224,362	)	$	376,561		$	(1,420	)	$	(1,616,912	)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		8,770			8,770			17,124			(17,540	)		17,124
Other		(445	)		(445	)		-			445			(445	)
Other comprehensive income (loss)		8,325			8,325			17,124			(17,095	)		16,679
Comprehensive income (loss)		(1,759,366	)		(216,037	)		393,685			(18,515	)		(1,600,233	)
Less: Comprehensive income attributable to		-			-			(159,133	)		-			(159,133	)
noncontrolling interests
Comprehensive income (loss) attributable to	$	(1,759,366	)	$	(216,037	)	$	234,552		$	(18,515	)	$	(1,759,366	)
MGM Resorts International
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION
	Year Ended December 31, 2012
	Parent			Guarantor			Non-			Elimination			Consolidated
				Subsidiaries			Guarantor
							Subsidiaries
Cash flows from operating activities	(In thousands)
Net cash provided by (used in) operating activities	$	(952,653	)	$	989,144		$	872,860		$	-		$	909,351
Cash flows from investing activities
Capital expenditures, net of construction payable		-			(332,089	)		(90,674	)		-			(422,763	)
Dispositions of property and equipment		-			191			235			-			426
Investments in and advances to		(46,800	)		(7,500	)		-			-			(54,300	)
unconsolidated affiliates
Distributions from unconsolidated affiliates		-			1,723			-			-			1,723
in excess of earnings
Investments in treasury securities -		-			(285,469	)		-			-			(285,469	)
maturities longer than 90 days
Proceeds from treasury securities -		-			315,438			-			-			315,438
maturities longer than 90 days
Other		(1,973	)		501			-			-			(1,472	)
Net cash used in investing activities		(48,773	)		(307,205	)		(90,439	)		-			(446,417	)
Cash flows from financing activities
Net borrowings under bank credit facilities -		1,331,500			-			447,762			-			1,779,262
maturities of 90 days or less
Borrowings under bank credit facilities -		-			-			1,350,000			-			1,350,000
maturities longer than 90 days
Repayments under bank credit facilities -		(1,834,128	)		-			(1,800,000	)		-			(3,634,128	)
maturities longer than 90 days
Issuance of senior notes		4,100,000			-			-			-			4,100,000
Retirement of senior notes		(4,009,117	)		-			-			-			(4,009,117	)
Debt issuance costs		(119,197	)		-			(41,048	)		-			(160,245	)
Intercompany accounts		996,462			(685,752	)		(310,710	)		-			-
Distributions to noncontrolling interest owners		-			-			(206,806	)		-			(206,806	)
Other		(5,035	)		(833	)		(57	)		-			(5,925	)
Net cash provided by (used in) financing activities		460,485			(686,585	)		(560,859	)		-			(786,959	)
Effect of exchange rate on cash		-			-			1,621			-			1,621
Cash and cash equivalents
Net increase (decrease) for the period		(540,941	)		(4,646	)		223,183			-			(322,404	)
Balance, beginning of period		795,326			230,888			839,699			-			1,865,913
Balance, end of period	$	254,385		$	226,242		$	1,062,882		$	-		$	1,543,509

Selected_Quarterly_Financial_R

Selected Quarterly Financial Results (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Results (Unaudited)	NOTE 19 — SELECTED QUARTERLY FINANCIAL RESULTS (UNAUDITED)
			Quarter
			First		Second			Third			Fourth			Total
	2014		(In thousands, except per share data)
	Net revenues		$	2,630,398	$	2,581,033		$	2,485,007		$	2,385,546		$	10,081,984
	Operating income			416,472		354,464			286,489			266,113			1,323,538
	Net income (loss)			186,100		178,168			50,382			(287,472	)		127,178
	Net income (loss) attributable to MGM Resorts			102,652		110,008			(20,270	)		(342,263	)		(149,873	)
	International
	Basic income (loss) per share		$	0.21	$	0.22		$	(0.04	)	$	(0.70	)	$	(0.31	)
	Diluted income (loss) per share		$	0.2	$	0.22		$	(0.04	)	$	(0.70	)	$	(0.31	)
	2013
	Net revenues		$	2,352,148	$	2,481,265		$	2,463,037		$	2,513,213		$	9,809,663
	Operating income			308,597		235,753			262,797			330,134			1,137,281
	Net income (loss)			22,197		(36,401	)		33,171			22,407			41,374
	Net income (loss) attributable to MGM Resorts			6,165		(98,781	)		(22,313	)		(56,805	)		(171,734	)
	International
	Basic income (loss) per share		$	0.01	$	(0.20	)	$	(0.05	)	$	(0.12	)	$	(0.35	)
	Diluted income (loss) per share		$	0.01	$	(0.20	)	$	(0.05	)	$	(0.12	)	$	(0.35	)
	Because income (loss) per share amounts are calculated using the weighted average number of common and dilutive common equivalent shares outstanding during each quarter, the sum of the per share amounts for the four quarters does not equal the total loss per share amounts for the year. The financial information presented above has been adjusted for the retroactive application of the equity method of accounting for our investment in Borgata.  See Note 6 for further discussion. In addition, the following sections list certain items affecting comparability of quarterly and year-to-date results and related per share amounts. Additional information related to these items is included elsewhere in the notes to the accompanying financial statements.
	2014 certain items affecting comparability are as follows:
	·	First Quarter. None;
	·	Second Quarter. The Company recorded an impairment charge related to its investment in Grand Victoria of $29 million ($0.04 per share in the quarter and full year of 2014);
	·	Third Quarter. None; and
	·	Fourth Quarter. The Company recorded its 50% share of CityCenter’s Harmon-related property transactions of $18 million ($0.02 per share in the quarter and full year of 2014) primarily related to a settlement charge with an insurer participating in the owner controlled insurance program for CityCenter.
	2013 certain items affecting comparability are as follows:
	·	First Quarter. None;
	·	Second Quarter. The Company recorded an impairment charge related to its investment in Grand Victoria of $37 million ($0.05 per share in the quarter and full year of 2013), and an impairment charge of $45 million related to corporate buildings which are expected to be removed from service ($0.06 per share in the quarter and full year of 2013);
	·	Third Quarter. The Company recorded impairment charges of $26 million primarily related to land holdings in Jean and Sloan, Nevada ($0.03 per share in the quarter and full year); and
	·	Fourth Quarter. The Company recorded a $70 million charge for its share of CityCenter’s loss on retirement of long-term debt ($0.09 per share in the quarter and full year), and a $12 million gain for its share of a gain on retirement of long-term debt related to Silver Legacy’s early redemption of its second lien notes ($0.02 per share in the quarter and full year of 2013).

Schedule_II_Valuation_and_Qual

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2014
Valuation And Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts	MGM RESORTS INTERNATIONAL
	SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
	(In thousands)
		Balance at		Provision for		Write-offs,
		Beginning of		Doubtful		Net of			Balance at
		Period		Accounts		Recoveries			End of Period
	Allowance for doubtful accounts:
	Year Ended December 31, 2014	$	81,713	$	46,698	$	(38,809	)	$	89,602
	Year Ended December 31, 2013		97,911		14,969		(31,167	)		81,713
	Year Ended December 31, 2012		101,207		57,068		(60,364	)		97,911
		Balance at
		Beginning of							Balance at
		Period		Increase		Decrease			End of Period
	Deferred income tax valuation allowance:
	Year Ended December 31, 2014	$	1,721,917	$	836,850	$	-		$	2,558,767
	Year Ended December 31, 2013		1,093,398		633,423		(4,904	)		1,721,917
	Year Ended December 31, 2012		72,001		1,023,644		(2,247	)		1,093,398

Basis_of_Presentation_and_Sign1

Basis of Presentation and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Principles of consolidation	Principles of consolidation.  The consolidated financial statements include the accounts of the Company and its subsidiaries. The Company’s investments in unconsolidated affiliates which are 50% or less owned are accounted for under the equity method.  The Company does not have significant variable interests in variable interest entities.  All intercompany balances and transactions have been eliminated in consolidation.
	In September 2014, the Company resumed accounting for the investment in Borgata under the equity method and has adjusted prior period financial statements retroactively.  See Note 6 for further discussion of our Borgata investment.
Management's use of estimates	Management’s use of estimates.  The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America.  These principles require the Company’s management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Actual results could differ from those estimates.
Fair value measurements	Fair value measurements.  Fair value measurements affect the Company’s accounting and impairment assessments of its long-lived assets, investments in unconsolidated affiliates, cost method investments, assets acquired and liabilities assumed in an acquisition, and goodwill and other intangible assets. Fair value measurements also affect the Company’s accounting for certain of its financial assets and liabilities. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and is measured according to a hierarchy that includes: Level 1 inputs, such as quoted prices in an active market; Level 2 inputs, which are observable inputs for similar assets; or Level 3 inputs, which are unobservable inputs.
	·	The Company uses Level 1 inputs for its long-term debt fair value disclosures. See Note 9; and
	·	The Company used Level 3 inputs when assessing the fair value of its investment in Grand Victoria. See Note 6.
Cash and cash equivalents	Cash and cash equivalents.  Cash and cash equivalents include investments and interest bearing instruments with maturities of 90 days or less at the date of acquisition.  Such investments are carried at cost, which approximates market value.  Book overdraft balances resulting from the Company’s cash management program are recorded as accounts payable, construction payable, or other accrued liabilities, as applicable.
Cash deposits b original maturities longer than 90 days	Cash deposits – original maturities longer than 90 days.  At December 31, 2014, the Company had $570 million in certificates of deposit with original maturities longer than 90 days. Scheduled maturities are at or prior to March 31, 2015. The fair value of the certificates of deposit equals their carrying value.
Accounts receivable and credit risk	Accounts receivable and credit risk.  Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of casino accounts receivable.  The Company issues credit to approved casino customers and gaming promoters following background checks and investigations of creditworthiness.  At December 31, 2014, 70% of the Company’s casino receivables were due from customers residing in foreign countries.  Business or economic conditions or other significant events in these countries could affect the collectibility of such receivables.
	Accounts receivable are typically non-interest bearing and are initially recorded at cost.  Accounts are written off when management deems the account to be uncollectible.  Recoveries of accounts previously written off are recorded when received.  An estimated allowance for doubtful accounts is maintained to reduce the Company’s receivables to their net carrying amount, which approximates fair value.  The allowance is estimated based on specific review of customer accounts as well as historical collection experience and current economic and business conditions.  Management believes that as of December 31, 2014, no significant concentrations of credit risk existed for which an allowance had not already been recorded.
Inventories	Inventories.  Inventories consist primarily of food and beverage, retail merchandise and operating supplies, and are stated at the lower of cost or market.  Cost is determined primarily using the average cost method for food and beverage and operating supplies.  Cost for retail merchandise is determined using the cost method.
Property and equipment	Property and equipment.  Property and equipment are stated at cost.  A significant amount of the Company’s property and equipment was acquired through business combinations and therefore recognized at fair value at the acquisition date.  Gains or losses on dispositions of property and equipment are included in the determination of income.  Maintenance costs are expensed as incurred.  As of December 31, 2014, the Company had accrued $14 million for property and equipment within accounts payable and $24 million related to construction retention accrued in other long-term liabilities.
	Property and equipment are generally depreciated over the following estimated useful lives on a straight-line basis:
	Buildings and improvements		20 to 40 years
	Land improvements		10 to 20 years
	Furniture and fixtures		3 to 20 years
	Equipment		3 to 20 years
	The Company evaluates its property and equipment and other long-lived assets for impairment based on its classification as held for sale or to be held and used.  Several criteria must be met before an asset is classified as held for sale, including that management with the appropriate authority commits to a plan to sell the asset at a reasonable price in relation to its fair value and is actively seeking a buyer. For assets held for sale, the Company recognizes the asset at the lower of carrying value or fair market value less costs to sell, as estimated based on comparable asset sales, offers received, or a discounted cash flow model.  For assets to be held and used, the Company reviews for impairment whenever indicators of impairment exist.  The Company then compares the estimated future cash flows of the asset, on an undiscounted basis, to the carrying value of the asset.  If the undiscounted cash flows exceed the carrying value, no impairment is indicated.  If the undiscounted cash flows do not exceed the carrying value, then an impairment is recorded based on the fair value of the asset, typically measured using a discounted cash flow model.  If an asset is still under development, future cash flows include remaining construction costs.  All recognized impairment losses, whether for assets held for sale or assets to be held and used, are recorded as operating expenses.  See Note 15 for information on recorded impairment charges.
Capitalized interest	Capitalized interest. The interest cost associated with major development and construction projects is capitalized and included in the cost of the project.  When no debt is incurred specifically for a project, interest is capitalized on amounts expended on the project using the weighted-average cost of the Company’s outstanding borrowings.  Capitalization of interest ceases when the project is substantially complete or development activity is suspended for more than a brief period.
Investments in and advances to unconsolidated affiliates	Investments in and advances to unconsolidated affiliates. The Company has investments in unconsolidated affiliates accounted for under the equity method. Under the equity method, carrying value is adjusted for the Company’s share of the investees’ earnings and losses, amortization of certain basis differences, as well as capital contributions to and distributions from these companies. Distributions in excess of equity method earnings are recognized as a return of investment and recorded as investing cash inflows in the accompanying consolidated statements of cash flows. The Company classifies operating income and losses as well as gains and impairments related to its investments in unconsolidated affiliates as a component of operating income or loss, as the Company’s investments in such unconsolidated affiliates are an extension of the Company’s core business operations.
	The Company evaluates its investments in unconsolidated affiliates for impairment whenever events or changes in circumstances indicate that the carrying value of its investment may have experienced an “other-than-temporary” decline in value. If such conditions exist, the Company compares the estimated fair value of the investment to its carrying value to determine if an impairment is indicated and determines whether the impairment is “other-than-temporary” based on its assessment of all relevant factors, including consideration of the Company’s intent and ability to retain its investment. The Company estimates fair value using a discounted cash flow analysis based on estimated future results of the investee and market indicators of terminal year capitalization rates, and a market approach that utilizes business enterprise value multiples based on a range of multiples from the Company’s peer group.  See Note 6 for results of the Company’s review of its investment in certain of its unconsolidated affiliates.
Special revenue bonds	Special revenue bonds. The Company holds South Jersey Transportation Authority special revenue bonds, the original proceeds from which were used to provide funding for the Atlantic City/Brigantine Connector Project. The repayment of the remaining principal and interest for the bonds is supported by eligible investment alternative tax obligation payments made to the Casino Reinvestment Development Authority from future casino licensees on the Renaissance Pointe land owned by the Company.  The Company assumed no future cash flows will be received to support the carrying value of the bonds, and recorded an other-than-temporary impairment of $47 million as of December 31, 2012, included in “Other, net.” Management believed the probability for casino development on Renaissance Pointe in the foreseeable future was remote due to the continued deterioration of the Atlantic City market and initial underperformance of a resort that opened in the market.
Goodwill and other intangible assets	Goodwill and other intangible assets.  Goodwill represents the excess of purchase price over fair market value of net assets acquired in business combinations.  Goodwill and indefinite-lived intangible assets must be reviewed for impairment at least annually and between annual test dates in certain circumstances. The Company performs its annual impairment tests in the fourth quarter of each fiscal year.  No impairments were indicated as a result of the annual impairment review for goodwill and indefinite-lived intangible assets in 2014, 2013 and 2012.
	Goodwill for relevant reporting units is tested for impairment using a discounted cash flow analysis based on the estimated future results of the Company’s reporting units discounted using market discount rates and market indicators of terminal year capitalization rates, and a market approach that utilizes business enterprise value multiples based on a range of multiples from the Company’s peer group.  The implied fair value of a reporting unit’s goodwill is compared to the carrying value of that goodwill.  The implied fair value of goodwill is determined by allocating the fair value of the reporting unit to its assets and liabilities and the amount remaining, if any, is the implied fair value of goodwill.  If the implied fair value of goodwill is less than its carrying value then it must be written down to its implied fair value.  License rights are tested for impairment using a discounted cash flow approach, and trademarks are tested for impairment using the relief-from-royalty method.  If the fair value of an indefinite-lived intangible asset is less than its carrying amount, an impairment loss must be recognized equal to the difference.
Revenue recognition and promotional allowances	Revenue recognition and promotional allowances.  Casino revenue is the aggregate net difference between gaming wins and losses, with liabilities recognized for funds deposited by customers before gaming play occurs (“casino front money”) and for chips in the customers’ possession (“outstanding chip liability”). Hotel, food and beverage, entertainment, retail and other operating revenues are recognized as services are performed and goods are provided.  Advance deposits on rooms and advance ticket sales are recorded as accrued liabilities until services are provided to the customer.
	Gaming revenues are recognized net of certain sales incentives, including discounts and points earned in point-loyalty programs.  The retail value of accommodations, food and beverage, and other services furnished to guests without charge is included in gross revenue and then deducted as promotional allowances.  The estimated cost of providing promotional allowances is primarily included in casino expenses as follows:
			Year Ended December 31,
			2014			2013			2012
			(In thousands)
	Rooms		$	115,463		$	111,842		$	109,713
	Food and beverage			295,667			294,555			298,111
	Entertainment, retail and other			39,673			39,606			35,643
			$	450,803		$	446,003		$	443,467
Gaming promoters	Gaming promoters. A significant portion of the high-end (“VIP”) gaming volume at MGM Macau is generated through the use of gaming promoters, also known as junket operators. These operators introduce high-end gaming players to MGM Macau, assist these customers with travel arrangements, and extend gaming credit to these players. VIP gaming at MGM Macau is conducted by the use of special purpose nonnegotiable gaming chips. Gaming promoters purchase these nonnegotiable chips from MGM Macau and in turn sell these chips to their players. The nonnegotiable chips allow MGM Macau to track the amount of wagering conducted by each gaming promoters’ clients in order to determine VIP gaming play volume, or rolling chip turnover, which is the amount of nonnegotiable chips wagered and lost. In exchange for the gaming promoters’ services, MGM Macau compensates the gaming promoters through revenue-sharing arrangements or rolling chip turnover-based commissions. The estimated portion of the gaming promoter commissions that represent amounts passed through to VIP customers is recorded as a reduction of casino revenue, and the estimated portion retained by the gaming promoter for its compensation is recorded as casino expense.
Reimbursed expenses	Reimbursed expenses.  The Company recognizes costs reimbursed pursuant to management services as revenue in the period it incurs the costs.  Reimbursed costs related primarily to the Company’s management of CityCenter.
Loyalty programs	Loyalty programs.  The Company’s primary loyalty program is “M life” and is available to patrons at substantially all of the Company’s wholly owned and operated resorts and CityCenter. Customers earn points based on their slots play which can be redeemed for FREEPLAY at any of the Company’s participating resorts. The Company records a liability based on the points earned multiplied by the redemption value, less an estimate for points not expected to be redeemed, and records a corresponding reduction in casino revenue. Customers also earn “Express Comps” based on their gaming play which can be redeemed for complimentary goods and services, including hotel rooms, food and beverage, and entertainment. The Company records a liability for the estimated costs of providing goods and services for Express Comps based on the Express Comps earned multiplied by a cost margin, less an estimate for Express Comps not expected to be redeemed and records a corresponding expense in the casino department. MGM Macau also has a loyalty program, whereby patrons earn rewards that can be redeemed for complimentary services, including hotel rooms, food and beverage, and entertainment.
Advertising	Advertising.  The Company expenses advertising costs the first time the advertising takes place.  Advertising expense, which is generally included in general and administrative expenses, was $156 million, $153 million and $139 million for 2014, 2013 and 2012, respectively.
Corporate expense	Corporate expense.  Corporate expense represents unallocated payroll, aircraft costs, professional fees and various other expenses not directly related to the Company’s casino resort operations.  In addition, corporate expense includes the costs associated with the Company’s evaluation and pursuit of new business opportunities, which are expensed as incurred.
Preopening and start-up expenses	Preopening and start-up expenses.  Preopening and start-up costs, including organizational costs, are expensed as incurred.  Costs classified as preopening and start-up expenses include payroll, outside services, advertising, and other expenses related to new or start-up operations.
Property transactions, net	Property transactions, net.  The Company classifies transactions such as write-downs and impairments, demolition costs, and normal gains and losses on the sale of assets as “Property transactions, net.”  See Note 15 for a detailed discussion of these amounts.
Income per share of common stock	Income (loss) per share of common stock.  The table below reconciles basic and diluted income (loss) per share of common stock.  Diluted net loss attributable to MGM Resorts International includes adjustments for the potentially dilutive effect on the Company’s equity interest in MGM China due to shares outstanding under the MGM China Share Option Plan.  Diluted weighted-average common and common equivalent shares includes adjustments for potential dilution of share-based awards outstanding under the Company’s stock compensation plans and the assumed conversion of convertible debt, unless the effect of inclusion of such shares would be antidilutive.
			Year Ended December 31,
			2014			2013			2012
	Numerator:		(In thousands)
	Net loss attributable to MGM Resorts International - basic		$	(149,873	)	$	(171,734	)	$	(1,767,691	)
	Potentially dilutive effect due to MGM China Share Option Plan			(340	)		(104	)		-
	Net loss attributable to MGM Resorts International - diluted		$	(150,213	)	$	(171,838	)	$	(1,767,691	)
	Denominator:
	Weighted-average common shares outstanding - basic and diluted			490,875			489,661			488,988
	Antidilutive share-based awards excluded from the calculation of diluted			19,254			18,468			25,041
	earnings per share
	The $300 million 4.25% senior convertible notes issued in June 2011 and the $1.15 billion 4.25% senior convertible notes issued in April 2010 were excluded from the calculation of diluted earnings per share for the years ended December 31, 2014, 2013 and 2012 as their effect would be antidilutive.
Currency translation	Currency translation.  The Company translates the financial statements of foreign subsidiaries that are not denominated in U.S. dollars.  Balance sheet accounts are translated at the exchange rate in effect at each balance sheet date.  Income statement accounts are translated at the average rate of exchange prevailing during the period.  Translation adjustments resulting from this process are recorded to other comprehensive income (loss).
Comprehensive income (loss)	Comprehensive income (loss). Comprehensive income includes net income (loss) and all other non-stockholder changes in equity, or other comprehensive income (loss).  Elements of the Company’s accumulated other comprehensive income are reported in the accompanying consolidated statements of stockholders’ equity, and the cumulative balance of these elements consisted of the following:
			December 31,
			2014			2013
			(In thousands)
	Currency translation adjustments		$	23,440		$	24,733
	Other comprehensive income (loss) from unconsolidated affiliates			672			(578	)
	Accumulated other comprehensive income			24,112			24,155
	Less: Currency translation adjustment attributable to noncontrolling interests			(11,121	)		(11,652	)
	Accumulated other comprehensive income attributable to MGM Resorts		$	12,991		$	12,503
	International
Recently issued accounting standards	Recently issued accounting standards. During 2014, the Company early adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update No. 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity ”, (“ASU 2014-08”), which is effective for fiscal years, and interim periods within those years, beginning on or after December 15, 2014.  ASU 2014-08 amends the definition of a discontinued operation by requiring discontinued operations treatment for disposals of a component or group of components that represent a strategic shift that has or will have a major impact on an entity’s operations or financial results, and also expands the scope of ASC 205-20 to disposals of equity method investments and acquired businesses held for sale.  Additionally, ASU 2014-08 requires enhanced disclosures about disposal transactions that do not meet the discontinued operations criteria.  Based on application of ASU 2014-08, the Company determined that certain disposals did not qualify as discontinued operations.  See Note 4 for further discussion.
	During 2014, the Company implemented FASB Accounting Standards Update No. 2013-11, “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists,” (“ASU 2013-11”), which is effective for fiscal years, and interim periods within those years, beginning on or after December 15, 2013. ASU 2013-11 provides explicit guidance on the financial statement presentation of unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. As a result of implementing ASU 2013-11, the Company recorded a reduction in liability for unrecognized tax benefits and a corresponding reduction in deferred tax assets of $19 million for the year ended December 31, 2014.
	In May 2014, the FASB issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers,” (“ASU 2014-09”), which is effective for fiscal years, and interim periods within those years, beginning on or after December 15, 2016. ASU 2014-09 outlines a new, single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. This new revenue recognition model provides a five-step analysis in determining when and how revenue is recognized. Additionally, the new model will require revenue recognition to depict the transfer of promised goods or services to customers in an amount that reflects the consideration a company expects to receive in exchange for those goods or services. The Company is currently assessing the impact that adoption of this new accounting guidance will have on its consolidated financial statements and footnote disclosures.

Basis_of_Presentation_and_Sign2

Basis of Presentation and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Schedule of Estimated Useful Lives of Property and Equipment	Property and equipment are generally depreciated over the following estimated useful lives on a straight-line basis:
	Buildings and improvements	20 to 40 years
	Land improvements	10 to 20 years
	Furniture and fixtures	3 to 20 years
	Equipment	3 to 20 years
Schedule of Estimated Cost of Providing Promotional Allowances	The estimated cost of providing promotional allowances is primarily included in casino expenses as follows:
		Year Ended December 31,
		2014			2013			2012
		(In thousands)
	Rooms	$	115,463		$	111,842		$	109,713
	Food and beverage		295,667			294,555			298,111
	Entertainment, retail and other		39,673			39,606			35,643
		$	450,803		$	446,003		$	443,467
Schedule of Diluted Weighted-Average Number of Common and Common Equivalent Shares Adjustments for Potential Dilution of Share-Based Awards Outstanding	Diluted weighted-average common and common equivalent shares includes adjustments for potential dilution of share-based awards outstanding under the Company’s stock compensation plans and the assumed conversion of convertible debt, unless the effect of inclusion of such shares would be antidilutive.
		Year Ended December 31,
		2014			2013			2012
	Numerator:	(In thousands)
	Net loss attributable to MGM Resorts International - basic	$	(149,873	)	$	(171,734	)	$	(1,767,691	)
	Potentially dilutive effect due to MGM China Share Option Plan		(340	)		(104	)		-
	Net loss attributable to MGM Resorts International - diluted	$	(150,213	)	$	(171,838	)	$	(1,767,691	)
	Denominator:
	Weighted-average common shares outstanding - basic and diluted		490,875			489,661			488,988
	Antidilutive share-based awards excluded from the calculation of diluted		19,254			18,468			25,041
	earnings per share
Schedule of Accumulated Other Comprehensive Income	Elements of the Company’s accumulated other comprehensive income are reported in the accompanying consolidated statements of stockholders’ equity, and the cumulative balance of these elements consisted of the following:
		December 31,
		2014			2013
		(In thousands)
	Currency translation adjustments	$	23,440		$	24,733
	Other comprehensive income (loss) from unconsolidated affiliates		672			(578	)
	Accumulated other comprehensive income		24,112			24,155
	Less: Currency translation adjustment attributable to noncontrolling interests		(11,121	)		(11,652	)
	Accumulated other comprehensive income attributable to MGM Resorts	$	12,991		$	12,503
	International

Accounts_Receivable_Net_Tables

Accounts Receivable, Net (Tables)	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Schedule of Accounts Receivable, Net	Accounts receivable, net consisted of the following:
		December 31,
		2014			2013
		(In thousands)
	Casino	$	307,152		$	309,620
	Hotel		149,268			156,201
	Other		106,527			104,109
			562,947			569,930
	Less: Allowance for doubtful accounts		(89,602	)		(81,713	)
		$	473,345		$	488,217

Property_and_Equipment_Net_Tab

Property and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Schedule of Property and Equipment, Net	Property and equipment, net consisted of the following:
		December 31,
		2014			2013
		(In thousands)
	Land	$	6,475,134		$	6,477,489
	Buildings, building improvements and land improvements		9,313,308			9,264,455
	Furniture, fixtures and equipment		4,178,723			4,040,887
	Construction in progress		999,616			437,434
			20,966,781			20,220,265
	Less: Accumulated depreciation and amortization		(6,525,239	)		(6,165,053	)
		$	14,441,542		$	14,055,212

Investments_in_and_Advances_to1

Investments in and Advances to Unconsolidated Affiliates (Tables)	12 Months Ended
	Dec. 31, 2014
Schedule of Investments in and Advances to Unconsolidated Affiliates
	Investments in and advances to unconsolidated affiliates consisted of the following:
			December 31,
			2014			2013
			(In thousands)
	CityCenter Holdings, LLC – CityCenter (50%)		$	1,221,306		$	1,172,087
	Elgin Riverboat Resort–Riverboat Casino – Grand Victoria (50%)			141,162			169,579
	Marina District Development Company – Borgata (50%)			109,252			94,425
	Other			87,314			33,170
			$	1,559,034		$	1,469,261
Schedule of Net income (Loss) from Unconsolidated Affiliates, Including Adjustments for Basis Differences	The Company recorded its share of the net income (loss) from unconsolidated affiliates, including adjustments for basis differences, as follows:
			Year Ended December 31,
			2014			2013			2012
			(In thousands)
	Income (loss) from unconsolidated affiliates		$	63,836		$	68,829		$	(16,800	)
	Preopening and start-up expenses			(917	)		(507	)		(656	)
	Non-operating items from unconsolidated affiliates			(87,794	)		(208,682	)		(130,845	)
			$	(24,875	)	$	(140,360	)	$	(148,301	)
Tabular Disclosure of Differences between Venture-Level Equity and Investment Balances	Differences between the Company’s venture-level equity and investment balances are as follows:
			December 31,
			2014			2013
			(In thousands)
	Venture-level equity		$	3,532,746		$	3,563,232
	Adjustment to CityCenter equity upon contribution of net assets by MGM Resorts			(578,554	)		(583,946	)
	International (1)
	CityCenter capitalized interest (2)			251,450			261,526
	Completion guarantee (3)			466,660			411,944
	Advances to CityCenter, net of discount (4)			(49,892	)		(53,296	)
	Other-than-temporary impairments of CityCenter investment (5)			(1,857,673	)		(1,915,153	)
	Other-than-temporary impairments of Borgata investment (6)			(130,333	)		(134,217	)
	Fair value adjustments upon acquisition of Grand Victoria investment (7)			267,190			267,190
	Other adjustments (8)			(342,560	)		(348,019	)
			$	1,559,034		$	1,469,261
	-1	Primarily relates to land and fixed assets.
	-2	Relates to interest capitalized on the Company’s investment balance during development and construction stages.
	-3	Created by contributions to CityCenter under the completion guarantee recognized as equity contributions by CityCenter split between the members.
	-4	During 2013, the Company converted its CityCenter sponsor notes to equity, resolving the basis difference related to such notes which were previously recognized as long-term debt by CityCenter.  The remaining basis difference relates to interest on the notes capitalized by CityCenter during development.
	-5	The impairment of the Company’s CityCenter investment includes $426 million of impairments allocated to land.
	-6	The impairment of the Company’s Borgata investment includes $90 million of impairments allocated to land.
	-7	Relates to indefinite-lived gaming license rights for Grand Victoria.
	-8	Other adjustments include the deferred gain on assets contributed to CityCenter upon formation of CityCenter and other-than-temporary impairments of the Company’s investment in Grand Victoria and Silver Legacy.
Unconsolidated Affiliates [Member]
Summarized Balance Sheet Information	Summarized balance sheet information of the unconsolidated affiliates is as follows:
			December 31,
			2014			2013
			(In thousands)
	Current assets		$	772,412		$	614,474
	Property and other assets, net			9,394,703			9,754,247
	Current liabilities			683,452			627,598
	Long-term debt and other long-term obligations			2,409,478			2,604,629
	Equity			7,074,185			7,136,494
Summarized Income Statement Information	Summarized results of operations of the unconsolidated affiliates are as follows:
			Year Ended December 31,
			2014			2013			2012
			(In thousands)
	Net revenues		$	2,299,698		$	2,280,309		$	2,213,577
	Operating expenses			(2,278,039	)		(2,247,743	)		(2,361,027	)
	Operating income (loss)			21,659			32,566			(147,450	)
	Interest expense			(164,055	)		(328,740	)		(360,021	)
	Non-operating expenses			(13,337	)		(146,898	)		(4,076	)
	Net loss		$	(155,733	)	$	(443,072	)	$	(511,547	)

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Goodwill and Other Intangible Assets	Goodwill and other intangible assets consisted of the following:
		December 31,
		2014			2013
	Goodwill:	(In thousands)
	Wholly owned domestic resorts	$	70,975		$	70,975
	MGM China		2,826,135			2,826,467
		$	2,897,110		$	2,897,442
	Indefinite-lived intangible assets:
	Detroit development rights	$	98,098		$	98,098
	Trademarks, license rights and other		232,123			232,123
	Total indefinite-lived intangible assets		330,221			330,221
	Finite-lived intangible assets:
	MGM Grand Paradise gaming subconcession		4,513,101			4,513,631
	Less: Accumulated amortization		(692,047	)		(526,152	)
			3,821,054			3,987,479
	MGM Macau land concession		84,717			84,727
	Less: Accumulated amortization		(15,272	)		(11,003	)
			69,445			73,724
	MGM China customer lists		128,946			128,961
	Less: Accumulated amortization		(116,664	)		(101,240	)
			12,282			27,721
	MGM China gaming promoter relationships		180,524			180,545
	Less: Accumulated amortization		(161,467	)		(116,335	)
			19,057			64,210
	Maryland license, Massachusetts license and other intangible assets		136,827			51,827
	Less: Accumulated amortization		(24,030	)		(23,321	)
			112,797			28,506
	Total finite-lived intangible assets, net		4,034,635			4,181,640
	Total other intangible assets, net	$	4,364,856		$	4,511,861
Schedule of Estimated Future Amortization	Estimated future amortization is as follows:
	Years ending December 31,	(In thousands)
	2015	$	199,256
	2016		174,317
	2017		173,794
	2018		178,044
	2019		178,044
	Thereafter		3,131,180
		$	4,034,635

Other_Accrued_Liabilities_Tabl

Other Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Schedule of Other Accrued Liabilities	Other accrued liabilities consisted of the following:
		December 31,
		2014		2013
		(In thousands)
	Payroll and related	$	369,497	$	394,709
	Advance deposits and ticket sales		103,440		104,504
	Casino outstanding chip liability		294,466		409,917
	Casino front money deposits		122,184		125,180
	MGM China gaming promoter commissions		74,754		118,122
	Other gaming related accruals		114,165		137,181
	Taxes, other than income taxes		201,562		236,991
	Completion guarantee liability		148,929		97,223
	Other		145,620		146,974
		$	1,574,617	$	1,770,801

LongTerm_Debt_Tables

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	Long-term debt consisted of the following:
			December 31,
			2014				2013
	Senior credit facility:		(In thousands)
	$2,744 million ($2,772 million at December 31, 2013) term loans, net		$	2,738,118			$	2,765,041
	MGM Grand Paradise credit facility			553,177				553,242
	$508.9 million 5.875% senior notes, due 2014, net			-				508,848
	$1,450 million 4.25% convertible senior notes, due 2015, net			1,451,405				1,456,153
	$875 million 6.625% senior notes, due 2015, net			875,370				876,022
	$242.9 million 6.875% senior notes, due 2016			242,900				242,900
	$732.7 million 7.5% senior notes, due 2016			732,749				732,749
	$500 million 10% senior notes, due 2016, net			497,955				496,987
	$743 million 7.625% senior notes, due 2017			743,000				743,000
	$475 million 11.375% senior notes, due 2018, net			468,949				467,451
	$850 million 8.625% senior notes, due 2019			850,000				850,000
	$500 million 5.25% senior notes, due 2020			500,000				500,000
	$1,000 million 6.75% senior notes, due 2020			1,000,000				1,000,000
	$1,250 million 6.625% senior notes, due 2021			1,250,000				1,250,000
	$1,000 million 7.75% senior notes, due 2022			1,000,000				1,000,000
	$1,250 million 6% senior notes, due 2023, net			1,250,742				-
	$0.6 million 7% debentures, due 2036, net			572				572
	$4.3 million 6.7% debentures, due 2096			4,265				4,265
				14,159,202				13,447,230
	Less: Current portion			(1,245,320	)			-
			$	12,913,882			$	13,447,230
Schedule of Interest Expense, Net	Interest expense, net consisted of the following:
		Year Ended December 31,
		2014				2013			2012
		(In thousands)
	Total interest incurred	$	846,321			$	862,417		$	1,117,327
	Interest capitalized		(29,260	)			(5,070	)		(969	)
		$	817,061			$	857,347		$	1,116,358
Schedule of Maturities of Long-Term Debt	Maturities of long-term debt.  Maturities of the Company’s long-term debt as of December 31, 2014 are as follows:
	Years ending December 31,				(In thousands)
	2015				$	2,353,000
	2016					1,641,944
	2017					2,183,382
	2018					492,500
	2019					2,495,000
	Thereafter					5,004,817
						14,170,643
	Debt premiums and discounts, net					(11,441	)
					$	14,159,202

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of Income (Loss) Before Taxes for Domestic and Foreign Operations	Income (loss) before income taxes for domestic and foreign operations consisted of the following:
		Year Ended December 31,
		2014			2013			2012
		(In thousands)
	Domestic operations	$	(168,135	)	$	(444,891	)	$	(2,048,868	)
	Foreign operations		579,021			507,081			314,655
		$	410,886		$	62,190		$	(1,734,213	)
Schedule of Benefit (Provision) for Income Taxes Attributable to Income (Loss) Before Income Taxes	The benefit (provision) for income taxes attributable to income (loss) before income taxes is as follows:
		Year Ended December 31,
		2014			2013			2012
	Federal:	(In thousands)
	Current	$	(10,448	)	$	3,532		$	1,636
	Deferred (excluding separate components)		785,225			963,919			1,011,881
	Deferred – operating loss carryforward		(277,453	)		(305,760	)		89,954
	Deferred – valuation allowance		(815,851	)		(634,190	)		(1,017,228	)
	Other noncurrent		33,130			14,522			(1,587	)
	Benefit (provision) for federal income taxes		(285,397	)		42,023			84,656
	State:
	Current		(2,214	)		(1,812	)		(3,466	)
	Deferred (excluding separate components)		4,338			4,056			24,104
	Deferred – operating loss carryforward		531			393			9,221
	Deferred – valuation allowance		412			(4,374	)		(2,579	)
	Other noncurrent		(547	)		879			(5,493	)
	Benefit (provision) for state income taxes		2,520			(858	)		21,787
	Foreign:
	Current		(1,656	)		(2,214	)		(3,217	)
	Deferred (excluding separate components)		1,726			(70,440	)		12,471
	Deferred – operating loss carryforward		3,495			1,312			(782	)
	Deferred – valuation allowance		(4,396	)		9,361			2,386
	Benefit (provision) for foreign income taxes		(831	)		(61,981	)		10,858
		$	(283,708	)	$	(20,816	)	$	117,301
Schedule of Reconciliation of the Federal Income Tax Statutory Rate and the Company's Effective Tax Rate	A reconciliation of the federal income tax statutory rate and the Company’s effective tax rate is as follows:
		Year Ended December 31,
		2014			2013			2012
	Federal income tax statutory rate		35	%		35	%		35	%
	Foreign tax credit		(222.0	)		(1,557.1	)		45.2
	Repatriation of foreign earnings		113.2			738.4			(19.2	)
	Federal valuation allowance		198.6			1,019.80			(58.7	)
	State income tax, net of federal benefit and valuation allowance		(0.4	)		0.8			0.8
	Settlements with taxing authorities		(7.6	)		(23.5	)		-
	Macau deferred tax liability re-measurement		-			96.1			-
	Foreign jurisdiction income/losses taxed at other than 35%		(49.1	)		(281.8	)		7
	Tax credits		(1.0	)		(13.1	)		0.5
	Permanent and other items		2.3			18.9			(3.8	)
			69	%		33.5	%		6.8	%
Schedule of Major Tax-Effected Components of the Company's Net Deferred Tax Liability	The major tax-effected components of the Company’s net deferred tax liability are as follows:
		December 31,
		2014			2013
	Deferred tax assets – federal and state:	(In thousands)
	Senior secured notes retirement	$	-		$	647
	Bad debt reserve		47,563			37,327
	Deferred compensation		4,074			3,680
	Net operating loss carryforward		21,555			304,077
	Accruals, reserves and other		129,311			148,303
	Investments in unconsolidated affiliates		236,528			268,896
	Stock-based compensation		34,449			31,185
	Tax credits		2,601,653			1,796,599
			3,075,133			2,590,714
	Less: Valuation allowance		(2,498,299	)		(1,665,846	)
			576,834			924,868
	Deferred tax assets – foreign:
	Bad debt reserve		1,456			333
	Net operating loss carryforward		59,329			55,834
	Accruals, reserves and other		64			154
	Property and equipment		10,687			11,204
			71,536			67,525
	Less: Valuation allowance		(60,468	)		(56,071	)
			11,068			11,454
	Total deferred tax assets	$	587,902		$	936,322
	Deferred tax liabilities – federal and state:
	Property and equipment		(2,549,866	)		(2,488,287	)
	Long-term debt		(293,006	)		(360,666	)
	Intangibles		(109,161	)		(105,231	)
			(2,952,033	)		(2,954,184	)
	Deferred tax liabilities – foreign:
	Intangibles		(319,871	)		(321,116	)
			(319,871	)		(321,116	)
	Total deferred tax liability	$	(3,271,904	)	$	(3,275,300	)
	Net deferred tax liability	$	(2,684,002	)	$	(2,338,978	)
Schedule of Reconciliation of the Beginning and Ending Amounts of Gross Unrecognized Tax Benefits	A reconciliation of the beginning and ending amounts of gross unrecognized tax benefits is as follows:
		Year Ended December 31,
		2014			2013			2012
		(In thousands)
	Gross unrecognized tax benefits at January 1	$	106,246		$	153,184		$	145,799
	Gross increases - prior period tax positions		1,626			6,082			6,903
	Gross decreases - prior period tax positions		(43,098	)		(35,508	)		(12,639	)
	Gross increases - current period tax positions		5,066			4,064			13,121
	Settlements with taxing authorities		(38,697	)		(21,576	)		-
	Gross unrecognized tax benefits at December 31	$	31,143		$	106,246		$	153,184

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments Required to be Made under Non-Cancellable Operating Leases and Capital Leases	At December 31, 2014, the Company was obligated under non-cancellable operating leases and capital leases to make future minimum lease payments as follows:
		Operating		Capital
		Leases		Leases
	Years ending December 31,	(In thousands)
	2015	$	53,380	$	5,376
	2016		53,372		4,057
	2017		24,333		3,143
	2018		22,246		1,596
	2019		20,300		-
	Thereafter		1,104,400		-
	Total minimum lease payments	$	1,278,031		14,172
	Less: Amounts representing interest				(1,214	)
	Total obligations under capital leases				12,958
	Less: Amounts due within one year				(4,691	)
	Amounts due after one year			$	8,267

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Schedule of Compensation Cost Recognized	Recognition of compensation cost. Compensation cost for both the Omnibus Plan and MGM China Plan was recognized as follows:
		Year Ended December 31,
		2014				2013				2012
	Compensation cost:	(In thousands)
	Omnibus Plan	$	29,662			$	27,201			$	37,588
	MGM China Plan		8,706				6,221				5,840
	Total compensation cost		38,368				33,422				43,428
	Less:  Reimbursed costs and other		(1,104	)			(1,090	)			(3,868	)
	Compensation cost recognized as expense		37,264				32,332				39,560
	Less:  Related tax benefit		(9,822	)			-				(1,660	)
	Compensation expense, net of tax benefit	$	27,442			$	32,332			$	37,900
Omnibus Plan [Member]
Summary of Stock Options and Stock Appreciation Rights Activity	Stock options and stock appreciation rights
										Weighted
						Weighted				Average				Aggregate
						Average				Remaining				Intrinsic
		Units				Exercise				Contractual				Value
		(000’s)				Price				Term				(000’s)
	Outstanding at January 1, 2014		16,074			$	15.22
	Granted		2,385				22.29
	Exercised		(1,837	)			14.68
	Forfeited or expired		(446	)			48.95
	Outstanding at December 31, 2014		16,176				15.27				3.53			$	121,194
	Vested and expected to vest at December 31, 2014		15,796				15.14				3.47			$	120,676
	Exercisable at December 31, 2014		10,750				14.1				2.43			$	98,485
Schedule of Restricted Stock Units and Performance Share Units Activity	Restricted stock units and performance share units
		RSUs								PSUs
						Weighted								Weighted		Weighted
						Average								Average		Average
		Units				Grant-Date				Units				Grant-Date		Target
		(000’s)				Fair Value				(000’s)				Fair Value		Price
	Nonvested at January 1, 2014		1,339			$	13.85				1,055			$	13.91	$	16.95
	Granted		603				22.51				400				18.39		29.8
	Vested		(552	)			12.39				-				-		-
	Forfeited		(32	)			14.73				-				-		-
	Nonvested at December 31, 2014		1,358				18.27				1,455				15.14		20.48
Schedule of Additional Information Related to Stock Options, SARs and RSUs	The following table includes additional information related to stock options, SARs and RSUs:
				Year Ended December 31,
				2014				2013				2012
				(In thousands)
	Intrinsic value of share-based awards exercised or RSUs vested			$	31,613			$	28,880			$	6,451
	Income tax benefit from share-based awards exercised or				10,805				9,975				2,236
	RSUs vested
Weighted Average Assumptions Utilized for SARs Grants	Compensation cost for SARs granted under the Omnibus Plan is based on the fair value of each award, measured by applying the Black-Scholes model on the date of grant, using the following weighted-average assumptions:
				Year Ended December 31,
				2014				2013				2012
	Expected volatility				40	%			54	%			65	%
	Expected term				4.9 yrs.				4.9 yrs.				5.0 yrs.
	Expected dividend yield				0	%			0	%			0	%
	Risk-free interest rate				1.6	%			1.6	%			0.7	%
	Weighted-average fair value of SARs granted			$	8.18			$	9.44			$	5.6
Weighted Average Assumptions Utilized for PSUs	Compensation cost for PSUs granted under the Omnibus Plan is based on the fair value of each award, measured by applying a Monte Carlo simulation method on the date of grant, using the following weighted-average assumptions:
				Year Ended December 31,
				2014				2013				2012
	Expected volatility				31	%			40	%			49	%
	Expected term				3.0 yrs.				3.0 yrs.				3.0 yrs.
	Expected dividend yield				0	%			0	%			0	%
	Risk-free interest rate				1	%			0.6	%			0.4	%
	Weighted-average fair value of PSUs granted			$	18.39			$	21.01			$	10.03
MGM China Plan [Member]
Summary of Stock Option Activity	Stock options
										Weighted
						Weighted				Average				Aggregate
						Average				Remaining				Intrinsic
		Units				Exercise				Contractual				Value
		(000’s)				Price				Term				(000’s)
	Outstanding at January 1, 2014		16,916			$	2.06
	Granted		19,920				3.47
	Exercised		(988	)			1.98
	Forfeited or expired		(790	)			2.67
	Outstanding at December 31, 2014		35,058				2.85				8.15			$	8,084
	Vested and expected to vest at December 31, 2014		33,065				2.82				8.08			$	8,022
	Exercisable at December 31, 2014		10,223				2.02				6.41			$	5,506
Weighted Average Assumptions Utilized for Stock Option Grants	Compensation cost for stock options granted under the MGM China Plan is based on the fair value of each award, measured by applying the Black-Scholes model on the date of grant, using the following weighted-average assumptions:
				Year Ended December 31,
				2014				2013				2012
	Expected volatility				39	%			46	%			60	%
	Expected term				7.9 yrs.				8.0 yrs.				8.0 yrs.
	Expected dividend yield				1.6	%			1.2	%			0	%
	Risk-free interest rate				1.8	%			1.7	%			2.1	%
	Weighted-average fair value of options granted			$	1.06			$	1.39			$	1.13

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Compensation And Retirement Disclosure [Abstract]
Table Outlining Company's Participation in Pension Plan	The Company’s participation in the Pension Plan is outlined in the table below.
								Expiration Date
					Pension Protection Act			of Collective
			EIN/Pension		Zone Status (1)			Bargaining
	Pension Fund		Plan Number		2013	2012		Agreements (2)
	Southern Nevada Culinary and		88-6016617/001		Green	Green		11/12/14 - 5/31/18
	Bartenders Pension Plan
	-1	The trustees of the Pension Plan have elected to apply the extended amortization and the special ten year asset smoothing rules under the Pension Relief Act of 2010.
	-2	The Company is party to ten collective bargaining agreements that require contributions to the Pension Plan.  The agreements between CityCenter Hotel Casino, LLC, Bellagio, Mandalay Corp., MGM Grand Hotel, LLC and the Local Joint Executive Board of Las Vegas are the most significant because more than half of the Company’s employee participants in the Pension Plan are covered by those four agreements. The collective bargaining agreement covering approximately 4,300 employees at MGM Grand Las Vegas expired in 2014. The Company has signed an extension of such agreement and is currently negotiating a new agreement.
Schedule of Contributions of Company's Multiemployer Pension and Other Multiemployer Benefit Plans	Contributions to the Company’s multiemployer pension plans and other multiemployer benefit plans were as follows:
			Year Ended December 31,
			2014			2013			2012
	Multiemployer Pension Plans		(In thousands)
	Southern Nevada Culinary and Bartenders Pension Plan		$	33,927		$	37,691		$	35,556
	Other pension plans not individually significant			7,323			8,280			8,083
	Total multiemployer pension plans		$	41,250		$	45,971		$	43,639
	Multiemployer Benefit Plans Other Than Pensions
	UNITE HERE Health		$	202,641		$	167,494		$	162,453
	Other			12,746			15,367			14,172
	Total multiemployer benefit plans other than pensions		$	215,387		$	182,861		$	176,625

Property_Transactions_Net_Tabl

Property Transactions, Net (Tables)	12 Months Ended
	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Schedule of Property Transactions, Net	Property transactions, net consisted of the following:
		Year Ended December 31,
		2014		2013		2012
		(In thousands)
	Grand Victoria investment impairment	$	28,789	$	36,607	$	85,009
	Corporate buildings impairment		-		44,510		-
	Other Nevada land impairment		-		20,354		-
	Borgata investment impairment		-		-		53,757
	Las Vegas Strip land impairment		-		-		366,406
	Atlantic City land impairment		-		-		166,569
	Other property transactions, net		12,213		23,290		25,065
		$	41,002	$	124,761	$	696,806

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Schedule of Segment Information	The following tables present the Company’s segment information:
		Year Ended December 31,
		2014			2013			2012
		(In thousands)
	Net Revenues
	Wholly owned domestic resorts	$	6,342,084		$	6,052,644		$	5,932,791
	MGM China		3,282,329			3,316,928			2,807,676
	Reportable segment net revenues		9,624,413			9,369,572			8,740,467
	Corporate and other		457,571			440,091			420,377
		$	10,081,984		$	9,809,663		$	9,160,844
	Adjusted Property EBITDA
	Wholly owned domestic resorts	$	1,518,307		$	1,442,686		$	1,325,220
	MGM China		850,471			814,109			679,345
	Reportable segment Adjusted Property EBITDA		2,368,778			2,256,795			2,004,565
	Other operating expense
	Corporate and other, net		(149,216	)		(132,214	)		(256,584	)
	Preopening and start-up expenses		(39,257	)		(13,314	)		(2,127	)
	Property transactions, net		(41,002	)		(124,761	)		(696,806	)
	Depreciation and amortization		(815,765	)		(849,225	)		(927,697	)
	Operating income		1,323,538			1,137,281			121,351
	Non-operating income (expense)
	Interest expense, net of amounts capitalized		(817,061	)		(857,347	)		(1,116,358	)
	Non-operating items from unconsolidated affiliates		(87,794	)		(208,682	)		(130,845	)
	Other, net		(7,797	)		(9,062	)		(608,361	)
			(912,652	)		(1,075,091	)		(1,855,564	)
	Income (loss) before income taxes		410,886			62,190			(1,734,213	)
	Benefit (provision) for income taxes		(283,708	)		(20,816	)		117,301
	Net income (loss)		127,178			41,374			(1,616,912	)
	Less: Net income attributable to noncontrolling interests		(277,051	)		(213,108	)		(150,779	)
	Net loss attributable to MGM Resorts International	$	(149,873	)	$	(171,734	)	$	(1,767,691	)
		December 31,
		2014			2013
	Total assets:	(In thousands)
	Wholly owned domestic resorts	$	13,336,737		$	13,151,719
	MGM China		8,842,949			9,203,742
	Reportable segment total assets		22,179,686			22,355,461
	Corporate and other		4,545,448			3,750,839
	Eliminated in consolidation		(22,623	)		(21,690	)
		$	26,702,511		$	26,084,610
		December 31,
		2014			2013
	Property and equipment, net:	(In thousands)
	Wholly owned domestic resorts	$	11,933,559		$	11,787,880
	MGM China		1,323,432			957,769
	Reportable segment property and equipment, net		13,256,991			12,745,649
	Corporate and other		1,207,174			1,331,253
	Eliminated in consolidation		(22,623	)		(21,690	)
		$	14,441,542		$	14,055,212
		Year Ended December 31,
		2014			2013			2012
	Capital expenditures:	(In thousands)
	Wholly owned domestic resorts	$	292,463		$	216,147		$	258,519
	MGM China		347,338			254,516			80,018
	Reportable segment capital expenditures		639,801			470,663			338,537
	Corporate and other		233,173			107,442			89,935
	Eliminated in consolidation		(933	)		(15,981	)		(5,709	)
		$	872,041		$	562,124		$	422,763

Consolidating_Condensed_Financ1

Consolidating Condensed Financial Information (Tables)	12 Months Ended
	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Schedule of Condensed Consolidating Balance Sheet Information	CONDENSED CONSOLIDATING BALANCE SHEET INFORMATION
		31-Dec-14
		Parent			Guarantor			Non-			Elimination			Consolidated
					Subsidiaries			Guarantor
								Subsidiaries
		(In thousands)
	Current assets	$	1,390,806		$	868,688		$	768,335		$	(669	)	$	3,027,160
	Property and equipment, net		-			12,445,086			2,008,428			(11,972	)		14,441,542
	Investments in subsidiaries		20,430,160			3,896,365			-			(24,326,525	)		-
	Investments in and advances to unconsolidated affiliates		-			1,526,446			7,588			25,000			1,559,034
	Intercompany accounts		-			2,175,091			-			(2,175,091	)		-
	Other non-current assets		141,035			414,801			7,118,939			-			7,674,775
		$	21,962,001		$	21,326,477		$	9,903,290		$	(26,489,257	)	$	26,702,511
	Current liabilities	$	1,680,319		$	953,179		$	775,097		$	(670	)	$	3,407,925
	Intercompany accounts		1,932,780			-			242,311			(2,175,091	)		-
	Deferred income taxes		2,312,828			-			309,032			-			2,621,860
	Long-term debt		11,907,534			4,837			1,001,511			-			12,913,882
	Other long-term obligations		37,623			58,016			34,931			-			130,570
	Total liabilities		17,871,084			1,016,032			2,362,882			(2,175,761	)		19,074,237
	MGM Resorts stockholders' equity		4,090,917			20,310,445			4,003,051			(24,313,496	)		4,090,917
	Noncontrolling interests		-			-			3,537,357			-			3,537,357
	Total stockholders' equity		4,090,917			20,310,445			7,540,408			(24,313,496	)		7,628,274
		$	21,962,001		$	21,326,477		$	9,903,290		$	(26,489,257	)	$	26,702,511
		31-Dec-13
		Parent			Guarantor			Non-			Elimination			Consolidated
					Subsidiaries			Guarantor
								Subsidiaries
		(In thousands)
	Current assets	$	494,296		$	903,537		$	1,322,170		$	(564	)	$	2,719,439
	Property and equipment, net		-			12,552,828			1,514,356			(11,972	)		14,055,212
	Investments in subsidiaries		19,991,695			4,037,168			-			(24,028,863	)		-
	Investments in and advances to unconsolidated affiliates		-			1,461,496			7,765			-			1,469,261
	Other non-current assets		167,552			422,259			7,250,887			-			7,840,698
		$	20,653,543		$	19,377,288		$	10,095,178		$	(24,041,399	)	$	26,084,610
	Current liabilities	$	340,343		$	959,118		$	941,431		$	(25,564	)	$	2,215,328
	Intercompany accounts		1,446,952			(1,470,305	)		23,353			-			-
	Deferred income taxes		2,110,229			-			309,738			-			2,419,967
	Long-term debt		12,441,112			4,836			1,001,282			-			13,447,230
	Other long-term obligations		98,856			41,758			976			-			141,590
	Total liabilities		16,437,492			(464,593	)		2,276,780			(25,564	)		18,224,115
	MGM Resorts stockholders' equity		4,216,051			19,841,881			4,173,954			(24,015,835	)		4,216,051
	Noncontrolling interests		-			-			3,644,444			-			3,644,444
	Total stockholders' equity		4,216,051			19,841,881			7,818,398			(24,015,835	)		7,860,495
		$	20,653,543		$	19,377,288		$	10,095,178		$	(24,041,399	)	$	26,084,610
Schedule of Condensed Consolidating Statement of Operations and Comprehensive Income Information	CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION
		Year Ended December 31, 2014
		Parent			Guarantor			Non-			Elimination			Consolidated
					Subsidiaries			Guarantor
								Subsidiaries
		(In thousands)
	Net revenues	$	-		$	6,270,708		$	3,813,736		$	(2,460	)	$	10,081,984
	Equity in subsidiaries' earnings		938,712			339,312			-			(1,278,024	)		-
	Expenses
	Casino and hotel operations		5,482			3,810,711			2,554,965			(2,460	)		6,368,698
	General and administrative		4,743			1,089,192			224,814			-			1,318,749
	Corporate expense		72,116			150,938			15,757			-			238,811
	Preopening and start-up expenses		-			5,384			33,873			-			39,257
	Property transactions, net		-			36,612			4,390			-			41,002
	Depreciation and amortization		-			500,401			315,364			-			815,765
			82,341			5,593,238			3,149,163			(2,460	)		8,822,282
	Income from unconsolidated affiliates		-			64,014			(178	)		-			63,836
	Operating income (loss)		856,371			1,080,796			664,395			(1,278,024	)		1,323,538
	Interest expense, net of amounts capitalized		(794,826	)		(574	)		(21,661	)		-			(817,061	)
	Other, net		50,793			(90,679	)		(55,705	)		-			(95,591	)
	Income (loss) before income taxes		112,338			989,543			587,029			(1,278,024	)		410,886
	Provision for income taxes		(262,211	)		(20,735	)		(762	)		-			(283,708	)
	Net income (loss)		(149,873	)		968,808			586,267			(1,278,024	)		127,178
	Less: Net income attributable to noncontrolling interests		-			-			(277,051	)		-			(277,051	)
	Net income (loss) attributable to MGM Resorts	$	(149,873	)	$	968,808		$	309,216		$	(1,278,024	)	$	(149,873	)
	International
	Net income (loss)	$	(149,873	)	$	968,808		$	586,267		$	(1,278,024	)	$	127,178
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment		(762	)		(762	)		(1,293	)		1,524			(1,293	)
	Other		1,250			1,250			-			(1,250	)		1,250
	Other comprehensive income (loss)		488			488			(1,293	)		274			(43	)
	Comprehensive income (loss)		(149,385	)		969,296			584,974			(1,277,750	)		127,135
	Less: Comprehensive income attributable to		-			-			(276,520	)		-			(276,520	)
	noncontrolling interests
	Comprehensive income (loss) attributable to	$	(149,385	)	$	969,296		$	308,454		$	(1,277,750	)	$	(149,385	)
	MGM Resorts International
	CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION
		Year Ended December 31, 2013
		Parent			Guarantor			Non-			Elimination			Consolidated
					Subsidiaries			Guarantor
								Subsidiaries
		(In thousands)
	Net revenues	$	-		$	5,955,001		$	3,856,728		$	(2,066	)	$	9,809,663
	Equity in subsidiaries' earnings		638,030			289,384			-			(927,414	)		-
	Expenses
	Casino and hotel operations		5,644			3,622,940			2,632,198			(2,066	)		6,258,716
	General and administrative		4,432			1,051,757			222,261			-			1,278,450
	Corporate expense		66,307			125,500			41,938			(17,000	)		216,745
	Preopening and start-up expenses		-			4,205			9,109			-			13,314
	Property transactions, net		-			126,773			(2,012	)		-			124,761
	Depreciation and amortization		-			522,900			326,325			-			849,225
			76,383			5,454,075			3,229,819			(19,066	)		8,741,211
	Income from unconsolidated affiliates		-			68,807			22			-			68,829
	Operating income (loss)		561,647			859,117			626,931			(910,414	)		1,137,281
	Interest expense, net of amounts capitalized		(805,933	)		(6,333	)		(45,081	)		-			(857,347	)
	Other, net		39,524			(212,065	)		(45,203	)		-			(217,744	)
	Income (loss) before income taxes		(204,762	)		640,719			536,647			(910,414	)		62,190
	Benefit (provision) for income taxes		33,028			11,111			(64,955	)		-			(20,816	)
	Net income (loss)		(171,734	)		651,830			471,692			(910,414	)		41,374
	Less: Net income attributable to noncontrolling interests		-			-			(213,108	)		-			(213,108	)
	Net income (loss) attributable to MGM Resorts	$	(171,734	)	$	651,830		$	258,584		$	(910,414	)	$	(171,734	)
	International
	Net income (loss)	$	(171,734	)	$	651,830		$	471,692		$	(910,414	)	$	41,374
	Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		(1,915	)		(1,915	)		(3,993	)		3,830			(3,993	)
Other		115			115			-			(115	)		115
Other comprehensive income (loss)		(1,800	)		(1,800	)		(3,993	)		3,715			(3,878	)
Comprehensive income (loss)		(173,534	)		650,030			467,699			(906,699	)		37,496
Less: Comprehensive income attributable to		-			-			(211,030	)		-			(211,030	)
noncontrolling interests
Comprehensive income (loss) attributable to	$	(173,534	)	$	650,030		$	256,669		$	(906,699	)	$	(173,534	)
MGM Resorts International
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION
	Year Ended December 31, 2012
	Parent			Guarantor			Non-			Elimination			Consolidated
				Subsidiaries			Guarantor
							Subsidiaries
	(In thousands)
Net revenues	$	-		$	5,782,523		$	3,379,891		$	(1,570	)	$	9,160,844
Equity in subsidiaries' earnings		(210,934	)		220,354			-			(9,420	)		-
Expenses
Casino and hotel operations		7,623			3,615,288			2,299,941			(1,570	)		5,921,282
General and administrative		7,101			1,025,028			207,645			-			1,239,774
Corporate expense		66,285			168,863			7,859			(8,000	)		235,007
Preopening and start-up expenses		-			1,486			641			-			2,127
Property transactions, net		-			693,519			3,287			-			696,806
Depreciation and amortization		-			519,074			408,623			-			927,697
		81,009			6,023,258			2,927,996			(9,570	)		9,022,693
Income from unconsolidated affiliates		-			(16,861	)		61			-			(16,800	)
Operating income (loss)		(291,943	)		(37,242	)		451,956			(1,420	)		121,351
Interest expense, net of amounts capitalized		(1,053,692	)		(10,986	)		(51,680	)		-			(1,116,358	)
Other, net		(526,606	)		(178,026	)		(34,574	)		-			(739,206	)
Income (loss) before income taxes		(1,872,241	)		(226,254	)		365,702			(1,420	)		(1,734,213	)
Benefit for income taxes		104,550			1,892			10,859			-			117,301
Net income (loss)		(1,767,691	)		(224,362	)		376,561			(1,420	)		(1,616,912	)
Less: Net income attributable to noncontrolling interests		-			-			(150,779	)		-			(150,779	)
Net income (loss) attributable to MGM Resorts	$	(1,767,691	)	$	(224,362	)	$	225,782		$	(1,420	)	$	(1,767,691	)
International
Net income (loss)	$	(1,767,691	)	$	(224,362	)	$	376,561		$	(1,420	)	$	(1,616,912	)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		8,770			8,770			17,124			(17,540	)		17,124
Other		(445	)		(445	)		-			445			(445	)
Other comprehensive income (loss)		8,325			8,325			17,124			(17,095	)		16,679
Comprehensive income (loss)		(1,759,366	)		(216,037	)		393,685			(18,515	)		(1,600,233	)
Less: Comprehensive income attributable to		-			-			(159,133	)		-			(159,133	)
noncontrolling interests
Comprehensive income (loss) attributable to	$	(1,759,366	)	$	(216,037	)	$	234,552		$	(18,515	)	$	(1,759,366	)
MGM Resorts International
Schedule of Condensed Consolidating Statement of Cash Flows Information	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION
		Year Ended December 31, 2012
		Parent			Guarantor			Non-			Elimination			Consolidated
					Subsidiaries			Guarantor
								Subsidiaries
	Cash flows from operating activities	(In thousands)
	Net cash provided by (used in) operating activities	$	(952,653	)	$	989,144		$	872,860		$	-		$	909,351
	Cash flows from investing activities
	Capital expenditures, net of construction payable		-			(332,089	)		(90,674	)		-			(422,763	)
	Dispositions of property and equipment		-			191			235			-			426
	Investments in and advances to		(46,800	)		(7,500	)		-			-			(54,300	)
	unconsolidated affiliates
	Distributions from unconsolidated affiliates		-			1,723			-			-			1,723
	in excess of earnings
	Investments in treasury securities -		-			(285,469	)		-			-			(285,469	)
	maturities longer than 90 days
	Proceeds from treasury securities -		-			315,438			-			-			315,438
	maturities longer than 90 days
	Other		(1,973	)		501			-			-			(1,472	)
	Net cash used in investing activities		(48,773	)		(307,205	)		(90,439	)		-			(446,417	)
	Cash flows from financing activities
	Net borrowings under bank credit facilities -		1,331,500			-			447,762			-			1,779,262
	maturities of 90 days or less
	Borrowings under bank credit facilities -		-			-			1,350,000			-			1,350,000
	maturities longer than 90 days
	Repayments under bank credit facilities -		(1,834,128	)		-			(1,800,000	)		-			(3,634,128	)
	maturities longer than 90 days
	Issuance of senior notes		4,100,000			-			-			-			4,100,000
	Retirement of senior notes		(4,009,117	)		-			-			-			(4,009,117	)
	Debt issuance costs		(119,197	)		-			(41,048	)		-			(160,245	)
	Intercompany accounts		996,462			(685,752	)		(310,710	)		-			-
	Distributions to noncontrolling interest owners		-			-			(206,806	)		-			(206,806	)
	Other		(5,035	)		(833	)		(57	)		-			(5,925	)
	Net cash provided by (used in) financing activities		460,485			(686,585	)		(560,859	)		-			(786,959	)
	Effect of exchange rate on cash		-			-			1,621			-			1,621
	Cash and cash equivalents
	Net increase (decrease) for the period		(540,941	)		(4,646	)		223,183			-			(322,404	)
	Balance, beginning of period		795,326			230,888			839,699			-			1,865,913
	Balance, end of period	$	254,385		$	226,242		$	1,062,882		$	-		$	1,543,509

Selected_Quarterly_Financial_R1

Selected Quarterly Financial Results (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Selected Quarterly Financial Results
		Quarter
		First		Second			Third			Fourth			Total
	2014	(In thousands, except per share data)
	Net revenues	$	2,630,398	$	2,581,033		$	2,485,007		$	2,385,546		$	10,081,984
	Operating income		416,472		354,464			286,489			266,113			1,323,538
	Net income (loss)		186,100		178,168			50,382			(287,472	)		127,178
	Net income (loss) attributable to MGM Resorts		102,652		110,008			(20,270	)		(342,263	)		(149,873	)
	International
	Basic income (loss) per share	$	0.21	$	0.22		$	(0.04	)	$	(0.70	)	$	(0.31	)
	Diluted income (loss) per share	$	0.2	$	0.22		$	(0.04	)	$	(0.70	)	$	(0.31	)
	2013
	Net revenues	$	2,352,148	$	2,481,265		$	2,463,037		$	2,513,213		$	9,809,663
	Operating income		308,597		235,753			262,797			330,134			1,137,281
	Net income (loss)		22,197		(36,401	)		33,171			22,407			41,374
	Net income (loss) attributable to MGM Resorts		6,165		(98,781	)		(22,313	)		(56,805	)		(171,734	)
	International
	Basic income (loss) per share	$	0.01	$	(0.20	)	$	(0.05	)	$	(0.12	)	$	(0.35	)
	Diluted income (loss) per share	$	0.01	$	(0.20	)	$	(0.05	)	$	(0.12	)	$	(0.35	)

Organization_Additional_Inform

Organization - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
	Segment
Organization Disclosure [Line Items]
Number of reportable segments	2
Boyd [Member] | Borgata [Member]
Organization Disclosure [Line Items]
Percentage ownership interest	50.00%
CityCenter Holdings, LLC [Member]
Organization Disclosure [Line Items]
Percentage ownership interest	50.00%	50.00%
Annual management fee	38,000,000	$38,000,000	$32,000,000
Marina District Development Company [Member]
Organization Disclosure [Line Items]
Percentage ownership interest	50.00%	50.00%
Grand Victoria [Member]
Organization Disclosure [Line Items]
Percentage ownership interest	50.00%			50.00%	50.00%	50.00%
Silver Legacy [Member]
Organization Disclosure [Line Items]
Percentage ownership interest	50.00%
MGM Hakkasan Hospitality [Member] | MGM Hakkasan [Member]
Organization Disclosure [Line Items]
Percentage ownership interest	50.00%
Las Vegas Arena Company, LLC [Member]
Organization Disclosure [Line Items]
Percentage ownership interest	50.00%
Maximum [Member]
Organization Disclosure [Line Items]
Percentage ownership interest	50.00%
Scenario, Forecast [Member] | Las Vegas Arena Company, LLC [Member]
Organization Disclosure [Line Items]
Expected development and construction cost, excluding capitalized and land related costs	350,000,000
Scenario, Forecast [Member] | Maximum [Member] | Las Vegas Arena Company, LLC [Member]
Organization Disclosure [Line Items]
Number of seats	20,000
Scenario, Forecast [Member] | Minimum [Member] | Las Vegas Arena Company, LLC [Member]
Organization Disclosure [Line Items]
Number of seats	18,000
MGM China [Member]
Organization Disclosure [Line Items]
Percentage ownership interest	51.00%
MGM Cotai [Member] | Scenario, Forecast [Member]
Organization Disclosure [Line Items]
Expected development and construction cost, excluding capitalized and land related costs	2,900,000,000
MGM Cotai [Member] | Scenario, Forecast [Member] | Maximum [Member]
Organization Disclosure [Line Items]
Number of hotel rooms	1,500
Number of gaming tables	500
Number of slots	1,500
Crystals [Member] | CityCenter Holdings, LLC [Member]
Organization Disclosure [Line Items]
Annual management fee	3,000,000
Aria and Vdara [Member] | CityCenter Holdings, LLC [Member]
Organization Disclosure [Line Items]
Management fee as a percentage of revenues	2.00%
Management fee received, percentage of EBITDA	5.00%
Mgm National Harbor [Member] | Scenario, Forecast [Member]
Organization Disclosure [Line Items]
Number of hotel rooms	300
Number of gaming tables	160
Number of slots	3,600
Expected development and construction cost, excluding capitalized and land related costs	1,200,000,000
Number of seats	3,000
Area of retail and restaurant space	79,000
Area of meeting and event space	50,000
Parking garage space	4,700
Mississippi [Member]
Organization Disclosure [Line Items]
Number of resorts owned and operated	2
Macau [Member] | MGM Cotai [Member] | Scenario, Forecast [Member]
Organization Disclosure [Line Items]
Area of development site (in acres)	18
Massachusetts [Member] | Mgm Springfield [Member] | Scenario, Forecast [Member]
Organization Disclosure [Line Items]
Area of development site (in acres)	14.5
Number of hotel rooms	250
Number of gaming tables	100
Number of slots	3,000
Expected development and construction cost, excluding capitalized and land related costs	760,000,000
Area of retail and restaurant space	64,000
Area of meeting and event space	33,000
Parking garage space	3,500

Basis_of_Presentation_and_Sign3

Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2011	Apr. 30, 2010
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Cash deposits - original maturities longer than 90 days	$570,000,000
Accrual for property and equipment	14,000,000
Construction retention accrued	24,000,000
Impairment charges	0	0	0
Advertising expense	156,000,000	153,000,000	139,000,000
Reduction in deferred tax assets	-19,000,000
Reduction in unrecognized tax benefits	-19,000,000
4.25% convertible senior notes, due 2015, net [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Debt Instrument Face Amount	1,450,000,000	1,450,000,000		300,000,000	1,150,000,000
Long-term debt, interest rate (as a percent)	4.25%	4.25%		4.25%	4.25%
South Jersey Transportation Authority special revenue bonds [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Other-than-temporary impairment of owned investment			$47,000,000
Foreign Country [Member] | Accounts Receivable [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of casino receivables were due from customers residing in foreign countries	70.00%
Maximum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage ownership interest	50.00%

Basis_of_Presentation_and_Sign4

Basis of Presentation and Significant Accounting Policies - Schedule of Estimated Useful Lives of Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2014
Minimum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Useful life	20 years
Minimum [Member] | Land improvements [Member]
Property, Plant and Equipment [Line Items]
Useful life	10 years
Minimum [Member] | Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Minimum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Maximum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Useful life	40 years
Maximum [Member] | Land improvements [Member]
Property, Plant and Equipment [Line Items]
Useful life	20 years
Maximum [Member] | Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Useful life	20 years
Maximum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful life	20 years

Basis_of_Presentation_and_Sign5

Basis of Presentation and Significant Accounting Policies - Schedule of Estimated Cost of Providing Promotional Allowances (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure - Basis of Presentation and Significant Accounting Policies - Schedule of Estimated Cost of Providing Promotional Allowances (Detail) [Line Items]
Casino	$3,643,881	$3,684,810	$3,396,752
Cost Of Promotional Allowances
Disclosure - Basis of Presentation and Significant Accounting Policies - Schedule of Estimated Cost of Providing Promotional Allowances (Detail) [Line Items]
Casino	450,803	446,003	443,467
Cost Of Promotional Allowances | Rooms [Member]
Disclosure - Basis of Presentation and Significant Accounting Policies - Schedule of Estimated Cost of Providing Promotional Allowances (Detail) [Line Items]
Casino	115,463	111,842	109,713
Cost Of Promotional Allowances | Food and beverage [Member]
Disclosure - Basis of Presentation and Significant Accounting Policies - Schedule of Estimated Cost of Providing Promotional Allowances (Detail) [Line Items]
Casino	295,667	294,555	298,111
Cost Of Promotional Allowances | Entertainment retail and other [Member]
Disclosure - Basis of Presentation and Significant Accounting Policies - Schedule of Estimated Cost of Providing Promotional Allowances (Detail) [Line Items]
Casino	$39,673	$39,606	$35,643

Basis_of_Presentation_and_Sign6

Basis of Presentation and Significant Accounting Policies - Schedule of Diluted Weighted-Average Number of Common and Common Equivalent Shares Adjustments for Potential Dilution of Share-Based Awards Outstanding (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator:
Net loss attributable to MGM Resorts International - basic	($149,873)	($171,734)	($1,767,691)
Potentially dilutive effect due to MGM China Share Option Plan	-340	-104
Net loss attributable to MGM Resorts International - diluted	($150,213)	($171,838)	($1,767,691)
Denominator:
Weighted-average common shares outstanding - basic and diluted	490,875	489,661	488,988
Antidilutive share-based awards excluded from the calculation of diluted earnings per share	19,254	18,468	25,041

Basis_of_Presentation_and_Sign7

Basis of Presentation and Significant Accounting Policies - Schedule of Accumulated Other Comprehensive Income (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Currency translation adjustments	$23,440	$24,733
Other comprehensive income (loss) from unconsolidated affiliates	672	-578
Accumulated other comprehensive income	24,112	24,155
Less: Currency translation adjustment attributable to noncontrolling interests	-11,121	-11,652
Accumulated other comprehensive income attributable to MGM Resorts International	$12,991	$12,503

Accounts_Receivable_Net_Schedu

Accounts Receivable, Net - Schedule of Accounts Receivable, Net (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$562,947	$569,930
Less: Allowance for doubtful accounts	-89,602	-81,713
Accounts receivable, net	473,345	488,217
Casino [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	307,152	309,620
Hotel [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	149,268	156,201
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$106,527	$104,109

Assets_Held_for_Sale_Additiona

Assets Held for Sale - Additional Information (Detail) (Assets Held-for-sale [Member], USD $)	0 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Oct. 31, 2014	Dec. 31, 2014
Railroad Pass Hotel & Casino [Member]
Long Lived Assets Held For Sale [Line Items]
Contingent upon regulatory approvals and other customary closing conditions	$8
Impairment charges	1
Assets held for sale			9
Liabilities held for sale			2
Gold Strike Hotel & Gambling Hall [Member]
Long Lived Assets Held For Sale [Line Items]
Contingent upon regulatory approvals and other customary closing conditions		12
Impairment charges		1
Assets held for sale			14
Liabilities held for sale			$2

Property_and_Equipment_Net_Sch

Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$20,966,781	$20,220,265
Less: Accumulated depreciation and amortization	-6,525,239	-6,165,053
Property and equipment, net	14,441,542	14,055,212
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,475,134	6,477,489
Buildings, building improvements and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,313,308	9,264,455
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,178,723	4,040,887
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$999,616	$437,434

Investments_in_and_Advances_to2

Investments in and Advances to Unconsolidated Affiliates - Schedule of Investments in and Advances to Unconsolidated Affiliates (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule Of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	$1,559,034	$1,469,261
CityCenter Holdings, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	1,221,306	1,172,087
Elgin Riverboat Resort-Riverboat Casino [Member]
Schedule Of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	141,162	169,579
Marina District Development Company [Member]
Schedule Of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	109,252	94,425
Other [Member]
Schedule Of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	$87,314	$33,170

Investments_in_and_Advances_to3

Investments in and Advances to Unconsolidated Affiliates - Schedule of Investments in and Advances to Unconsolidated Affiliates (Parenthetical) (Detail)	Dec. 31, 2014	Dec. 31, 2013
CityCenter Holdings, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest	50.00%	50.00%
Elgin Riverboat Resort-Riverboat Casino [Member]
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest	50.00%	50.00%
Marina District Development Company [Member]
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest	50.00%	50.00%

Investments_in_and_Advances_to4

Investments in and Advances to Unconsolidated Affiliates - Schedule of Net Income (Loss) from Unconsolidated Affiliates (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity Method Investments And Joint Ventures [Abstract]
Income (loss) from unconsolidated affiliates	$63,836	$68,829	($16,800)
Preopening and start-up expenses	-917	-507	-656
Non-operating items from unconsolidated affiliates	-87,794	-208,682	-130,845
Net income (loss) from unconsolidated affiliates	($24,875)	($140,360)	($148,301)

Investments_in_and_Advances_to5

Investments in and Advances to Unconsolidated Affiliates - Additional Information (Detail) (USD $)	12 Months Ended		1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2013	Dec. 31, 2013	Dec. 31, 2014
Schedule Of Equity Method Investments [Line Items]
Loss on retirement of long-term debt	$3,801,000	$563,292,000
Maximum [Member]
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest					50.00%
CityCenter Holdings, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Recognized property transactions, net					24,000,000
Loss on retirement of long-term debt			70,000,000	70,000,000
Debt restructuring, sponsor notes carrying value					738,000,000
Percentage ownership interest	50.00%			50.00%	50.00%
CityCenter Holdings, LLC [Member] | Harmon [Member]
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest		50.00%			50.00%
Demolition cost		32,000,000
Demolition cost, proportionate share from equity method investee		16,000,000
CityCenter Holdings, LLC [Member] | Residential Inventory [Member]
Schedule Of Equity Method Investments [Line Items]
Real estate impairment charges		36,000,000
Percentage ownership interest		50.00%
Real estate impairment charges of unconsolidated affiliates		18,000,000
CityCenter Holdings, LLC [Member] | Senior Secured First Lien Notes [Member]
Schedule Of Equity Method Investments [Line Items]
Long-term debt, interest rate (as a percent)			7.63%
CityCenter Holdings, LLC [Member] | Senior Secured Credit Facility [Member] | Former Credit Facilities
Schedule Of Equity Method Investments [Line Items]
Credit facility amount			1,775,000,000
CityCenter Holdings, LLC [Member] | Senior Secured Credit Facility [Member] | Revolving Credit Facility
Schedule Of Equity Method Investments [Line Items]
Credit facility amount			75,000,000
Debt Instrument face amount			16-Oct-18
CityCenter Holdings, LLC [Member] | Senior Secured Credit Facility [Member] | Term Loan B Facility [Member]
Schedule Of Equity Method Investments [Line Items]
Debt Instrument Face Amount			1,700,000,000
Credit facility, maturity date			16-Oct-20
Percentage of principal amount issued			99.00%
Interest rate margin (as a percent)			3.25%
Interest rate floor (as a percent)			1.00%
Repayments					154,000,000
CityCenter Holdings, LLC [Member] | Minimum [Member] | Senior Secured Second Lien PIK Toggle Notes [Member]
Schedule Of Equity Method Investments [Line Items]
Long-term debt, interest rate (as a percent)			10.75%
CityCenter Holdings, LLC [Member] | Maximum [Member] | Senior Secured Second Lien PIK Toggle Notes [Member]
Schedule Of Equity Method Investments [Line Items]
Long-term debt, interest rate (as a percent)			11.50%
CityCenter Holdings, LLC [Member] | Perini construction agreement [Member]
Schedule Of Equity Method Investments [Line Items]
Recognized property transactions, net					$48,000,000

Investments_in_and_Advances_to6

Investments in and Advances to Unconsolidated Affiliates - Additional Information 1 (Detail) (USD $)

1 Months Ended

9 Months Ended

12 Months Ended

0 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

0 Months Ended

1 Months Ended

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2012

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2014

Jun. 30, 2014

Sep. 30, 2014

Nov. 30, 2012

Jan. 01, 2012

Schedule Of Equity Method Investments [Line Items]

Trust asset distribution

$83,000,000

Retroactive adjustments on net income (loss)

15,000,000

0

Retroactive adjustments on retained earnings

0

Term loan

13,447,230,000

13,447,230,000

14,159,202,000

Cash contributed towards construction of Arena

38,000,000

Gain on redeemed outstanding second lien notes

12,000,000

Grand Victoria [Member]

Schedule Of Equity Method Investments [Line Items]

Investment impairment charge

36,607,000

85,009,000

85,000,000

29,000,000

37,000,000

29,000,000

37,000,000

28,789,000

Percentage ownership interest

50.00%

50.00%

50.00%

50.00%

50.00%

50.00%

50.00%

Grand Victoria [Member] | Fair Value, Inputs, Level 3 [Member]

Schedule Of Equity Method Investments [Line Items]

Estimated fair value

205,000,000

140,000,000

170,000,000

140,000,000

170,000,000

140,000,000

Grand Victoria [Member] | Fair Value, Inputs, Level 3 [Member] | Discounted cash flow analysis [Member]

Schedule Of Equity Method Investments [Line Items]

Long-term growth rate (as a percent)

2.00%

2.00%

2.00%

Discount rate (as a percent)

10.50%

11.00%

10.50%

Borgata [Member]

Schedule Of Equity Method Investments [Line Items]

Impairment charges on cost method investments

54,000,000

Borgata [Member] | Fair Value, Inputs, Level 3 [Member]

Schedule Of Equity Method Investments [Line Items]

Estimated fair value

120,000,000

Borgata [Member] | Fair Value, Inputs, Level 3 [Member] | Discounted cash flow analysis [Member]

Schedule Of Equity Method Investments [Line Items]

Discount rate (as a percent)

10.50%

Long-term growth rate (as a percent)

2.50%

Las Vegas Arena Company, LLC [Member]

Schedule Of Equity Method Investments [Line Items]

Percentage ownership interest

50.00%

Credit facility, maturity date

31-Oct-16

Cash to be contributed towards construction of Arena

175,000,000

Cash contributed towards construction of Arena

38,000,000

Las Vegas Arena Company, LLC [Member] | Amendment Option

Schedule Of Equity Method Investments [Line Items]

Line of credit facility extending option

3 years

Las Vegas Arena Company, LLC [Member] | Term Loan A

Schedule Of Equity Method Investments [Line Items]

Term loan

125,000,000

125,000,000

Las Vegas Arena Company, LLC [Member] | Term Loan B Facility [Member]

Schedule Of Equity Method Investments [Line Items]

Term loan

75,000,000

75,000,000

Silver Legacy [Member] | Senior Secured Credit Facility [Member]

Schedule Of Equity Method Investments [Line Items]

Credit facility amount

70,000,000

Gain on redeemed outstanding second lien notes

24,000,000

Silver Legacy [Member] | Senior Notes Due March 2012 [Member]

Schedule Of Equity Method Investments [Line Items]

Outstanding senior notes

143,000,000

Silver Legacy [Member] | Subordinated Sponsor Notes [Member]

Schedule Of Equity Method Investments [Line Items]

Investment by each partner as part of reorganization

$7,500,000

Investments_in_and_Advances_to7

Investments in and Advances to Unconsolidated Affiliates - Summarized Balance Sheet Information (Detail) (Unconsolidated Affiliates [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Unconsolidated Affiliates [Member]
Schedule Of Equity Method Investments [Line Items]
Current assets	$772,412	$614,474
Property and other assets, net	9,394,703	9,754,247
Current liabilities	683,452	627,598
Long-term debt and other long-term obligations	2,409,478	2,604,629
Equity	$7,074,185	$7,136,494

Investments_in_and_Advances_to8

Investments in and Advances to Unconsolidated Affiliates - Summarized Income Statement Information (Detail) (Unconsolidated Affiliates [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Unconsolidated Affiliates [Member]
Schedule Of Equity Method Investments [Line Items]
Net revenues	$2,299,698	$2,280,309	$2,213,577
Operating expenses	-2,278,039	-2,247,743	-2,361,027
Operating income (loss)	21,659	32,566	-147,450
Interest expense	-164,055	-328,740	-360,021
Non-operating expenses	-13,337	-146,898	-4,076
Net loss	($155,733)	($443,072)	($511,547)

Investments_in_and_Advances_to9

Investments in and Advances to Unconsolidated Affiliates - Tabular Disclosure of Differences between Venture-Level Equity and Investment Balances (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule Of Equity Method Investments [Line Items]
Venture-level equity	$3,532,746	$3,563,232
Adjustment to CityCenter equity upon contribution of net assets by MGM resorts International	-578,554	-583,946
CityCenter capitalized interest	251,450	261,526
Completion guarantee	466,660	411,944
Advances to CityCenter, net of discount	-49,892	-53,296
Fair value adjustments upon acquisition of Grand Victoria investment	267,190	267,190
Other adjustments	-342,560	-348,019
Investment balance	1,559,034	1,469,261
CityCenter Holdings, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Other-than-temporary impairments of investment	-1,857,673	-1,915,153
Investment balance	1,221,306	1,172,087
Borgata [Member]
Schedule Of Equity Method Investments [Line Items]
Other-than-temporary impairments of investment	($130,333)	($134,217)

Recovered_Sheet1

Investments in and Advances to Unconsolidated Affiliates - Tabular Disclosure of Differences between Venture-Level Equity and Investment Balances (Parenthetical) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
CityCenter Holdings, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Other-than-temporary impairments of investment	($1,857,673)	($1,915,153)
Borgata [Member]
Schedule Of Equity Method Investments [Line Items]
Other-than-temporary impairments of investment	-130,333	-134,217
Land [Member] | CityCenter Holdings, LLC [Member]
Schedule Of Equity Method Investments [Line Items]
Other-than-temporary impairments of investment	426,000
Land [Member] | Borgata [Member]
Schedule Of Equity Method Investments [Line Items]
Other-than-temporary impairments of investment	$90,000

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill And Intangible Assets [Line Items]
Goodwill	$2,897,110	$2,897,442
Total indefinite-lived intangible assets	330,221	330,221
Finite-lived intangible assets, net	4,034,635	4,181,640
Total other intangible assets, net	4,364,856	4,511,861
Wholly Owned Domestic Resorts [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	70,975	70,975
MGM China [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	2,826,135	2,826,467
Detroit Development Rights [Member]
Goodwill And Intangible Assets [Line Items]
Total indefinite-lived intangible assets	98,098	98,098
Trademarks, License Rights and Other [Member]
Goodwill And Intangible Assets [Line Items]
Total indefinite-lived intangible assets	232,123	232,123
MGM Grand Paradise, Gaming Subconcession [Member]
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	4,513,101	4,513,631
Less: Accumulated amortization	-692,047	-526,152
Finite-lived intangible assets, net	3,821,054	3,987,479
MGM Macau, Land Concession [Member]
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	84,717	84,727
Less: Accumulated amortization	-15,272	-11,003
Finite-lived intangible assets, net	69,445	73,724
MGM China, Customer Lists [Member]
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	128,946	128,961
Less: Accumulated amortization	-116,664	-101,240
Finite-lived intangible assets, net	12,282	27,721
MGM China, Gaming Promoter Relationships [Member]
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	180,524	180,545
Less: Accumulated amortization	-161,467	-116,335
Finite-lived intangible assets, net	19,057	64,210
Maryland License, Massachusetts License and Other Intangible Assets [Member]
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, gross	136,827	51,827
Less: Accumulated amortization	-24,030	-23,321
Finite-lived intangible assets, net	$112,797	$28,506

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended	0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2013	Apr. 20, 2005
Finite Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$330,221,000	$330,221,000
Consideration paid for license fee	85,000,000	21,600,000
Amortization expense related to intangible assets	232,000,000	243,000,000	321,000,000
MGM Grand Paradise, Gaming Subconcession [Member]
Finite Lived Intangible Assets [Line Items]
Estimated remaining useful life of gaming subconcession				25 years
MGM China, Customer Lists [Member] | MGM China [Member]
Finite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	5 years
MGM China, Gaming Promoter Relationships [Member] | MGM China [Member]
Finite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	4 years
License [Member] | Maryland [Member]
Finite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	15 years
Consideration paid for license fee	22,000,000
License [Member] | Massachusetts [Member]
Finite Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	15 years
Consideration paid for license fee	85,000,000
Trademarks, License Rights and Other [Member]
Finite Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	232,123,000	232,123,000
Mandalay Resort Group Acquisition (2005) [Member] | Trademarks, License Rights and Other [Member]
Finite Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$213,000,000
MGM Grand Paradise SA [Member] | MGM Grand Paradise, Gaming Subconcession [Member]
Finite Lived Intangible Assets [Line Items]
Period for the right to operate casino games of chance and other casino games					15 years

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets - Schedule of Estimated Future Amortization (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]
2015	$199,256
2016	174,317
2017	173,794
2018	178,044
2019	178,044
Thereafter	3,131,180
Finite-lived intangible assets, net	$4,034,635	$4,181,640

Other_Accrued_Liabilities_Sche

Other Accrued Liabilities - Schedule of Other Accrued Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Other Liabilities Disclosure [Abstract]
Payroll and related	$369,497	$394,709
Advance deposits and ticket sales	103,440	104,504
Casino outstanding chip liability	294,466	409,917
Casino front money deposits	122,184	125,180
MGM China gaming promoter commissions	74,754	118,122
Other gaming related accruals	114,165	137,181
Taxes, other than income taxes	201,562	236,991
Completion guarantee liability	148,929	97,223
Other	145,620	146,974
Other accrued liabilities	$1,574,617	$1,770,801

LongTerm_Debt_Schedule_of_Long

Long-Term Debt - Schedule of Long-Term Debt (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Long-term debt	$14,159,202	$13,447,230
Less: Current portion	-1,245,320
Long-term debt	12,913,882	13,447,230
Term loans [Member] | Senior credit facility [Member]
Debt Instrument [Line Items]
Long-term debt	2,738,118	2,765,041
MGM Grand Paradise credit facility [Member]
Debt Instrument [Line Items]
Long-term debt	553,177	553,242
5.875% senior notes, due 2014, net [Member]
Debt Instrument [Line Items]
Long-term debt		508,848
4.25% convertible senior notes, due 2015, net [Member]
Debt Instrument [Line Items]
Long-term debt	1,451,405	1,456,153
6.625% senior notes, due 2015, net [Member]
Debt Instrument [Line Items]
Long-term debt	875,370	876,022
6.875% senior notes, due 2016 [Member]
Debt Instrument [Line Items]
Long-term debt	242,900	242,900
7.5% senior notes, due 2016 [Member]
Debt Instrument [Line Items]
Long-term debt	732,749	732,749
10% senior notes, due 2016, net [Member]
Debt Instrument [Line Items]
Long-term debt	497,955	496,987
7.625% senior notes, due 2017 [Member]
Debt Instrument [Line Items]
Long-term debt	743,000	743,000
11.375% senior notes, due 2018, net [Member]
Debt Instrument [Line Items]
Long-term debt	468,949	467,451
8.625% senior notes, due 2019 [Member]
Debt Instrument [Line Items]
Long-term debt	850,000	850,000
5.25% senior notes, due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt	500,000	500,000
6.75% senior notes, due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt	1,000,000	1,000,000
6.625% senior notes, due 2021 [Member]
Debt Instrument [Line Items]
Long-term debt	1,250,000	1,250,000
7.75% senior notes, due 2022 [Member]
Debt Instrument [Line Items]
Long-term debt	1,000,000	1,000,000
6% senior notes, due 2023 [Member]
Debt Instrument [Line Items]
Long-term debt	1,250,742
7% debentures, due 2036, net [Member]
Debt Instrument [Line Items]
Long-term debt	572	572
6.7% debentures, due 2096 [Member]
Debt Instrument [Line Items]
Long-term debt	$4,265	$4,265

LongTerm_Debt_Schedule_of_Long1

Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail) (USD $)	1 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2011	Apr. 30, 2010	Dec. 31, 2014	Dec. 31, 2013
5.875% senior notes, due 2014, net [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			$508.90	$508.90
Long-term debt, interest rate (as a percent)			5.88%	5.88%
Long-term debt, maturity year			2014	2014
4.25% convertible senior notes, due 2015, net [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount	300	1,150	1,450	1,450
Long-term debt, interest rate (as a percent)	4.25%	4.25%	4.25%	4.25%
Long-term debt, maturity year	2015	2015	2015	2015
6.625% senior notes, due 2015, net [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			875	875
Long-term debt, interest rate (as a percent)			6.63%	6.63%
Long-term debt, maturity year			2015	2015
6.875% senior notes, due 2016 [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			242.9	242.9
Long-term debt, interest rate (as a percent)			6.88%	6.88%
Long-term debt, maturity year			2016	2016
7.5% senior notes, due 2016 [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			732.7	732.7
Long-term debt, interest rate (as a percent)			7.50%	7.50%
Long-term debt, maturity year			2016	2016
10% senior notes, due 2016, net [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			500	500
Long-term debt, interest rate (as a percent)			10.00%	10.00%
Long-term debt, maturity year			2016	2016
7.625% senior notes, due 2017 [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			743	743
Long-term debt, interest rate (as a percent)			7.63%	7.63%
Long-term debt, maturity year			2017	2017
11.375% senior notes, due 2018, net [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			475	475
Long-term debt, interest rate (as a percent)			11.38%	11.38%
Long-term debt, maturity year			2018	2018
8.625% senior notes, due 2019 [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			850	850
Long-term debt, interest rate (as a percent)			8.63%	8.63%
Long-term debt, maturity year			2019	2019
5.25% senior notes, due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			500	500
Long-term debt, interest rate (as a percent)			5.25%	5.25%
Long-term debt, maturity year			2020	2020
6.75% senior notes, due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			1,000	1,000
Long-term debt, interest rate (as a percent)			6.75%	6.75%
Long-term debt, maturity year			2020	2020
6.625% senior notes, due 2021 [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			1,250	1,250
Long-term debt, interest rate (as a percent)			6.63%	6.63%
Long-term debt, maturity year			2021	2021
7.75% senior notes, due 2022 [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			1,000	1,000
Long-term debt, interest rate (as a percent)			7.75%	7.75%
Long-term debt, maturity year			2022	2022
6% senior notes, due 2023 [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			1,250	1,250
Long-term debt, interest rate (as a percent)			6.00%	6.00%
Long-term debt, maturity year			2023	2023
7% debentures, due 2036, net [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			0.6	0.6
Long-term debt, interest rate (as a percent)			7.00%	7.00%
Long-term debt, maturity year			2036	2036
6.7% debentures, due 2096 [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			4.3	4.3
Long-term debt, interest rate (as a percent)			6.70%	6.70%
Long-term debt, maturity year			2096	2096
Senior credit facility [Member] | Term loans [Member]
Debt Instrument [Line Items]
Long-term debt, principal amount			$2,744	$2,772

LongTerm_Debt_Schedule_of_Inte

Long-Term Debt - Schedule of Interest Expense, Net (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Disclosure [Abstract]
Total interest incurred	$846,321	$862,417	$1,117,327
Interest capitalized	-29,260	-5,070	-969
Interest expense, net	$817,061	$857,347	$1,116,358

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2011	Apr. 30, 2010	31-May-13
Debt Instrument [Line Items]
Loss on retirement of long-term debt		$3,801,000	$563,292,000
Issuance of senior notes	1,250,750,000	500,000,000	4,100,000,000
Long-term debt, fair value	15,100,000,000	14,900,000,000
MGM Grand Paradise credit facility [Member]
Debt Instrument [Line Items]
Credit facility, maturity date	31-Oct-17
Maximum [Member] | MGM Grand Paradise credit facility [Member] | Debt Covenant Terms Prior to First Anniversary of MGM Cotai Opening [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio	4.5
Maximum [Member] | MGM Grand Paradise credit facility [Member] | Debt Covenant Terms Subsequent to First Anniversary of MGM Cotai Opening [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio	4
Minimum [Member] | MGM Grand Paradise credit facility [Member]
Debt Instrument [Line Items]
Consolidated interest coverage ratio	2.5
5.875% senior notes, due 2014, net [Member]
Debt Instrument [Line Items]
Repayments	509,000,000
Long-term debt, interest rate (as a percent)	5.88%	5.88%
Long-term debt, maturity year	2014	2014
Long-term debt, principal amount	508,900,000	508,900,000
6.75% senior notes, due 2013, net [Member]
Debt Instrument [Line Items]
Repayments		462,000,000
Long-term debt, interest rate (as a percent)		6.75%
Long-term debt, maturity year		2013
7.625% senior notes, due 2013, net [Member]
Debt Instrument [Line Items]
Repayments		150,000,000
Long-term debt, interest rate (as a percent)		7.63%
Long-term debt, maturity year		2013
6% senior notes, due 2023 [Member]
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	6.00%
Long-term debt, maturity year	2023
Issuance of senior notes	1,250,000,000
Net proceeds from senior notes	1,240,000,000
5.25% senior notes, due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	5.25%	5.25%
Long-term debt, maturity year	2020	2020
Issuance of senior notes		500,000,000
Net proceeds from senior notes		494,000,000
Long-term debt, principal amount	500,000,000	500,000,000
Senior Secured Notes [Member] | Tender offers [Member]
Debt Instrument [Line Items]
Loss on retirement of long-term debt			457,000,000
Premiums paid to redeem or discharge debt			379,000,000
Write-off of previously recorded discounts and debt issuance cost	75,000,000
Other cost	3,000,000
13% senior secured notes, due 2013, net [Member]
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)			13.00%
Long-term debt, maturity year			2013
10.375% senior secured notes, due 2014, net [Member]
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)			10.38%
Long-term debt, maturity year			2014
11.125% senior secured notes, due 2017, net [Member]
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)			11.13%
Long-term debt, maturity year			2017
9% senior secured notes, due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)			9.00%
Long-term debt, maturity year			2020
4.25% convertible senior notes, due 2015, net [Member]
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	4.25%	4.25%		4.25%	4.25%
Long-term debt, maturity year	2015	2015		2015	2015
Long-term debt, principal amount	1,450,000,000	1,450,000,000		300,000,000	1,150,000,000
Proceeds From Convertible Debt				311,000,000	1,120,000,000
Conversion ratio, number of shares per $1,000 principal amount, numerator					53.83
Initial conversion price of shares (in dollars per share)	$18.58
Cap price of capped call transactions (in dollars per share)					$21.86
Percentage of purchase price to principal amount				103.81%
Trading price as a percentage of principal				105.87%
HIBOR [Member] | MGM Grand Paradise credit facility [Member]
Debt Instrument [Line Items]
Variable interest rate base	HIBOR
Interest rate margin (as a percent)	1.75%
HIBOR [Member] | Maximum [Member] | MGM Grand Paradise credit facility [Member]
Debt Instrument [Line Items]
Interest rate margin (as a percent)	2.50%
HIBOR [Member] | Minimum [Member] | MGM Grand Paradise credit facility [Member]
Debt Instrument [Line Items]
Interest rate margin (as a percent)	1.75%
Revolving Credit Facility | HIBOR [Member] | MGM Grand Paradise credit facility [Member]
Debt Instrument [Line Items]
Credit facility amount	1,450,000,000
Senior credit facility term loan A [Member]
Debt Instrument [Line Items]
Credit facility amount	1,030,000,000
Credit facility, maturity date	20-Dec-17
Amortization payments of original principal balance (as percent)	0.25%
Interest rate at the end of the period (as a percent)	2.90%
Senior credit facility term loan A [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Variable interest rate base	LIBOR
Senior credit facility term loan B [Member]
Debt Instrument [Line Items]
Credit facility amount	1,720,000,000
Interest rate floor (as a percent)	1.00%
Credit facility, maturity date	20-Dec-19
Amortization payments of original principal balance (as percent)	0.25%
Interest rate at the end of the period (as a percent)	3.50%
Senior credit facility term loan B [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Variable interest rate base	LIBOR
Interest rate margin (as a percent)	2.50%
Term loans [Member] | MGM Grand Paradise credit facility [Member]
Debt Instrument [Line Items]
Credit facility amount	550,000,000
Senior credit facility [Member]
Debt Instrument [Line Items]
Loss on retirement of long-term debt			107,000,000			4,000,000
Annual capital expenditures	500,000,000
Annual capital expenditures after giving effect to unused amounts from prior year	681,000,000
Senior credit facility [Member] | Collateralized land and assets of MGM Grand Detroit [Member] | MGM Grand Detroit, LLC [Member]
Debt Instrument [Line Items]
Debt instrument, collateral amount	450,000,000
Senior credit facility [Member] | Maximum [Member] | Collateralized land and assets of MGM Grand Las Vegas, Bellagio and The Mirage [Member]
Debt Instrument [Line Items]
Debt instrument, collateral amount	3,350,000,000
Senior credit facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Trailing annual earnings before interest, taxes, depreciation and amortization (EBITDA)	1,200,000,000
Senior credit facility [Member] | Minimum [Member] | Debt Covenant Terms March Thirty One Two Thousand And Fifteen [Member]
Debt Instrument [Line Items]
Trailing annual earnings before interest, taxes, depreciation and amortization (EBITDA)	1,250,000,000
Senior credit facility [Member] | Minimum [Member] | Debt Covenant Terms June Thirty Two Thousand And Fifteen [Member]
Debt Instrument [Line Items]
Trailing annual earnings before interest, taxes, depreciation and amortization (EBITDA)	1,250,000,000
Senior credit facility [Member] | Minimum [Member] | Debt Covenant Terms September Thirty Two Thousand And Fifteen [Member]
Debt Instrument [Line Items]
Trailing annual earnings before interest, taxes, depreciation and amortization (EBITDA)	1,300,000,000
Senior credit facility [Member] | Minimum [Member] | Debt Covenant Terms December Thirty One Two Thousand And Fifteen [Member]
Debt Instrument [Line Items]
Trailing annual earnings before interest, taxes, depreciation and amortization (EBITDA)	1,300,000,000
Senior credit facility [Member] | Minimum [Member] | Debt Covenant Terms 2014 [Member]
Debt Instrument [Line Items]
Trailing annual earnings before interest, taxes, depreciation and amortization (EBITDA)	1,370,000,000
Senior credit facility [Member] | Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility amount	1,200,000,000
Credit facility, maturity date	20-Dec-17
Available borrowing capacity	1,100,000,000
Senior credit facility [Member] | Revolving Credit Facility | LIBOR [Member]
Debt Instrument [Line Items]
Variable interest rate base	LIBOR
Interest rate margin (as a percent)	2.75%
Senior credit facility [Member] | Term loans [Member]
Debt Instrument [Line Items]
Repayments	28,000,000
Long-term debt, principal amount	$2,744,000,000	$2,772,000,000

LongTerm_Debt_Schedule_of_Matu

Long-Term Debt - Schedule of Maturities of Long-Term Debt (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]
2015	$2,353,000
2016	1,641,944
2017	2,183,382
2018	492,500
2019	2,495,000
Thereafter	5,004,817
Long-term debt, carrying amount	14,170,643
Debt premiums and discounts, net	-11,441
Long-term debt	$14,159,202	$13,447,230

Income_Taxes_Schedule_of_Incom

Income Taxes - Schedule of Income (Loss) Before Taxes for Domestic and Foreign Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Domestic operations	($168,135)	($444,891)	($2,048,868)
Foreign operations	579,021	507,081	314,655
Income (loss) before income taxes	$410,886	$62,190	($1,734,213)

Income_Taxes_Schedule_of_Benef

Income Taxes - Schedule of Benefit (Provision) for Income Taxes Attributable to Income (Loss) Before Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Federal:
Current	($10,448)	$3,532	$1,636
Deferred (excluding separate components)	785,225	963,919	1,011,881
Deferred b operating loss carryforward	-277,453	-305,760	89,954
Deferred b valuation allowance	-815,851	-634,190	-1,017,228
Other noncurrent	33,130	14,522	-1,587
Benefit (provision) for federal income taxes	-285,397	42,023	84,656
State:
Current	-2,214	-1,812	-3,466
Deferred (excluding separate components)	4,338	4,056	24,104
Deferred b operating loss carryforward	531	393	9,221
Deferred b valuation allowance	412	-4,374	-2,579
Other noncurrent	-547	879	-5,493
State and Local Income Tax Expense (Benefit), Continuing Operations	2,520	-858	21,787
Foreign:
Current	-1,656	-2,214	-3,217
Deferred (excluding separate components)	1,726	-70,440	12,471
Deferred b operating loss carryforward	3,495	1,312	-782
Deferred b valuation allowance	-4,396	9,361	2,386
Benefit (provision) for foreign income taxes	-831	-61,981	10,858
Income tax provision (benefit)	($283,708)	($20,816)	$117,301

Income_Taxes_Schedule_of_Recon

Income Taxes - Schedule of Reconciliation of the Federal Income Tax Statutory Rate and the Company's Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal income tax statutory rate	35.00%	35.00%	35.00%
Foreign tax credit	-222.00%	-1557.10%	45.20%
Repatriation of foreign earnings	113.20%	738.40%	-19.20%
Federal valuation allowance	198.60%	1019.80%	-58.70%
State income tax, net of federal benefit and valuation allowance	-0.40%	0.80%	0.80%
Settlements with taxing authorities	-7.60%	-23.50%
Macau deferred tax liability re-measurement		96.10%
Foreign jurisdiction income/losses taxed at other than 35%	-49.10%	-281.80%	7.00%
Tax credits	-1.00%	-13.10%	0.50%
Permanent and other items	2.30%	18.90%	-3.80%
Provision for income taxes (as a percent)	69.00%	33.50%	6.80%

Income_Taxes_Schedule_of_Major

Income Taxes - Schedule of Major Tax-Effected Components of the Company's Net Deferred Tax Liability (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets
Deferred tax assets, net	$587,902	$936,322
Deferred tax liabilities
Total deferred tax liability	-3,271,904	-3,275,300
Net deferred tax liability	-2,684,002	-2,338,978
Federal and state [Member]
Deferred tax assets
Senior secured notes retirement		647
Bad debt reserve	47,563	37,327
Deferred compensation	4,074	3,680
Net operating loss carryforward	21,555	304,077
Accruals, reserves and other	129,311	148,303
Investments in unconsolidated affiliates	236,528	268,896
Stock-based compensation	34,449	31,185
Tax credits	2,601,653	1,796,599
Deferred tax assets, gross	3,075,133	2,590,714
Less: Valuation allowance	-2,498,299	-1,665,846
Deferred tax assets, net	576,834	924,868
Deferred tax liabilities
Property and equipment	-2,549,866	-2,488,287
Long-term debt	-293,006	-360,666
Intangibles	-109,161	-105,231
Total deferred tax liability	-2,952,033	-2,954,184
Foreign [Member]
Deferred tax assets
Bad debt reserve	1,456	333
Net operating loss carryforward	59,329	55,834
Accruals, reserves and other	64	154
Deferred tax assets, gross	71,536	67,525
Less: Valuation allowance	-60,468	-56,071
Deferred tax assets, net	11,068	11,454
Property and equipment	10,687	11,204
Deferred tax liabilities
Intangibles	-319,871	-321,116
Total deferred tax liability	($319,871)	($321,116)

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Line Items]
Unrepatriated foreign earnings and profits to be repatriated	$270
Deferred tax liability of repatriate	0
MGM China [Member]
Income Tax Disclosure [Line Items]
Repatriation of foreign earnings and profits	390	312
MGM Grand Paradise SA [Member]
Income Tax Disclosure [Line Items]
Increase in provision for income taxes		65
Complementary tax	493
Macau [Member] | MGM Grand Paradise SA [Member]
Income Tax Disclosure [Line Items]
Macau's complementary tax rate on distributions of gaming profits (as a percent)	12.00%
Period of exempted complementary tax rate granted by Macau government	Five-year
Increase in net loss attributable to MGM Resorts International	47	43
Per share increase in net loss attributable to MGM Resorts International	$0.10	$0.09
Additional period of exempted complementary tax rate granted by Macau government	5 years
Annual payments required under the extended annual fee arrangement	2
Macau [Member] | MGM Grand Paradise SA [Member] | MGM China [Member]
Income Tax Disclosure [Line Items]
Annual payments accrued for extended annual fee arrangement	2	2
Foreign [Member]
Income Tax Disclosure [Line Items]
Foreign tax credit carryovers amount	813	976
Foreign [Member] | 2015 [Member]
Income Tax Disclosure [Line Items]
Foreign tax credit carryovers expiration amount	2
Foreign [Member] | 2022 [Member]
Income Tax Disclosure [Line Items]
Foreign tax credit carryovers expiration amount	785
Foreign [Member] | 2023 [Member]
Income Tax Disclosure [Line Items]
Foreign tax credit carryovers expiration amount	976
Foreign [Member] | 2024 [Member]
Income Tax Disclosure [Line Items]
Foreign tax credit carryovers expiration amount	$813

Income_Taxes_Additional_Inform1

Income Taxes - Additional Information1 (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Line Items]
Deferred tax asset, foreign tax credit	$2,600,000,000
Tax benefit threshold limit	50.00%
Uncertain tax positions, long-term	26,000,000
Unrecognized tax benefits, if recognized, would affect the effective tax rate	12,000,000	32,000,000
Interest related to unrecognized tax benefits accrued	4,000,000	17,000,000
Accrued penalties	0	0	0
Interest related to unrecognized tax benefits	-13,000,000	-12,000,000	3,000,000
Deposited $30 million with the IRS to cover the expected cash taxes and interest	30,000,000
Income tax refund		2,000,000
Reasonably possible, decrease in liability for uncertain tax positions, high end of range	10,000,000
MGM Grand Paradise SA [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	493,000,000
Macau [Member]
Income Tax Disclosure [Line Items]
Deferred tax assets, valuation allowance	60,000,000
Special gaming tax rate	35.00%
Macau [Member] | MGM Grand Paradise SA [Member]
Income Tax Disclosure [Line Items]
Complementary tax exemption expiration date	31-Dec-16
Tax credit carryforward, description	MGM Grand Paradisebs current five-year exemption from the Macau 12% complementary tax on gaming profits ends on December 31, 2016, the Company assumes that it will receive an additional five-year exemption beyond 2016 consistent with the assumption utilized for measurement of the net deferred tax liability of MGM Grand Paradise. For all periods beyond December 31, 2021, the Company has assumed that MGM Grand Paradise will be paying the Macau 12% complementary tax on gaming profits and will thus not be able to credit the Macau Special Gaming Tax in such years, and have factored that assumption into its assessment of the realization of the foreign tax credit deferred tax asset. Furthermore, the Company does not rely on future U.S source operating income in assessing future foreign tax credit realization due to its history of recent losses in the U.S. and therefore only relies on U.S. federal taxable temporary differences that it expects will reverse during the 10-year foreign tax credit carryover period.
Foreign Tax Credit Carry Forward Expiration Period	10 years
New Jersey [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards expire	2034
U.S. federal [Member]
Income Tax Disclosure [Line Items]
Estimated alternative minimum tax credit carryforward	23,000,000
Estimated alternative minimum tax credit carryforward	2,000,000
Tax credit carryforward expiration date, federal	2034
Deferred tax assets, valuation allowance	2,500,000,000
State [Member]
Income Tax Disclosure [Line Items]
Deferred tax assets, valuation allowance	15,000,000
State [Member] | Illinois [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	82,000,000
Deferred tax assets after federal tax effect and before valuation allowance	4,000,000
State [Member] | Illinois [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards expire	2021
State [Member] | Illinois [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards expire	2026
State [Member] | New Jersey [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	231,000,000
Deferred tax assets after federal tax effect and before valuation allowance	$13,000,000
State [Member] | New Jersey [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards expire	2015

Income_Taxes_Schedule_of_Recon1

Income Taxes - Schedule of Reconciliation of the Beginning and Ending Amounts of Gross Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Gross unrecognized tax benefits at January 1	$106,246	$153,184	$145,799
Gross increases - prior period tax positions	1,626	6,082	6,903
Gross decreases - prior period tax positions	-43,098	-35,508	-12,639
Gross increases - current period tax positions	5,066	4,064	13,121
Settlements with taxing authorities	-38,697	-21,576
Gross unrecognized tax benefits at December 31	$31,143	$106,246	$153,184

Commitments_and_Contingencies_1

Commitments and Contingencies - Schedule of Future Minimum Lease Payments Required to be Made under Non-Cancellable Operating Leases and Capital Leases (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Commitments And Contingencies Disclosure [Abstract]
2015	$53,380
2016	53,372
2017	24,333
2018	22,246
2019	20,300
Thereafter	1,104,400
Total minimum lease payments	1,278,031
2015	5,376
2016	4,057
2017	3,143
2018	1,596
Total minimum lease payments	14,172
Less: Amounts representing interest	-1,214
Total obligations under capital leases	12,958
Less: Amounts due within one year	-4,691
Amounts due after one year	$8,267

Commitments_and_Contingencies_2

Commitments and Contingencies - Additional Information (Detail) (USD $)

12 Months Ended

1 Months Ended

0 Months Ended

1 Months Ended

0 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Oct. 31, 2013

Dec. 31, 2014

Feb. 24, 2014

Apr. 30, 2010

Mar. 31, 2010

Feb. 28, 2015

Apr. 30, 2013

Jan. 31, 2015

Jan. 09, 2013

acre

Payments

Loss Contingencies [Line Items]

Rental expense for operating leases

$65,000,000

$41,000,000

$33,000,000

Initial term of contract

25 years

Completion guarantee liability

148,929,000

97,223,000

148,929,000

Senior credit facility [Member]

Loss Contingencies [Line Items]

Letter of credit outstanding

91,000,000

91,000,000

Decrease in collateral letter of credit

31,000,000

Senior credit facility [Member] | Letters of credit [Member]

Loss Contingencies [Line Items]

Amount that can be issued

500,000,000

500,000,000

Harmon

Loss Contingencies [Line Items]

Demolition cost

32,000,000

Perini Litigation

Loss Contingencies [Line Items]

Proceeds from sale of condominiums

58,000,000

CityCenter Holdings, LLC [Member] | Completion guarantee [Member]

Loss Contingencies [Line Items]

Net residential proceeds to fund or reimburse construction costs

72,000,000

CityCenter Holdings, LLC [Member] | Builders Risk [Member] | Harmon

Loss Contingencies [Line Items]

Proceeds from insurance settlements

55,000,000

CityCenter Holdings, LLC [Member] | Construction Defect [Member] | Harmon

Loss Contingencies [Line Items]

Proceeds from insurance settlements

85,000,000

CityCenter Holdings, LLC [Member] | Perini Litigation

Loss Contingencies [Line Items]

Payments for legal settlements

153,000,000

14,000,000

CityCenter Holdings, LLC [Member] | Perini Litigation | Harmon

Loss Contingencies [Line Items]

Gross proceeds to City Center

191,000,000

CityCenter Holdings, LLC [Member] | Perini Litigation | Perini construction agreement [Member]

Loss Contingencies [Line Items]

Damages sought

174,000,000

491,000,000

490,000,000

Number of claims resolved

219

Other Components Of City Center Project | Harmon

Loss Contingencies [Line Items]

Proceeds from legal settlements

38,000,000

City Center Completion Guarantee | Senior credit facility [Member]

Loss Contingencies [Line Items]

Collateral posted for arbitration

55,000,000

55,000,000

Subsequent Event [Member] | Perini Litigation | Harmon | Guarantee Obligations [Member]

Loss Contingencies [Line Items]

Payments for legal settlements

18,000,000

Massachusetts [Member]

Loss Contingencies [Line Items]

Secure deposit on capital investment, description

the Company was required to either deposit 10% of the total investment proposed in the license application into an interest-bearing account, or secure a deposit bond insuring that 10% of the proposed capital investment shall be forfeited to the Commonwealth of Massachusetts if the Companybs subsidiary is unable to complete the gaming establishment.

MGM National Harbor Project [Member]

Loss Contingencies [Line Items]

Rental expense for operating leases

13,000,000

Land lease agreement

23

Initial lease term

25 years

Number of lease extension periods

13

13

Number of reasonably assured lease extensions

7

7

Length of each potential extension period for operating leases

6 years

Operating lease term

67 years

MGM China [Member] | Guarantee Type, Other | Senior credit facility [Member]

Loss Contingencies [Line Items]

Letter of credit outstanding

39,000,000

39,000,000

Insurer Owner Controlled Insurance Program Arbitration [Member] | Subsequent Event [Member] | CityCenter Holdings, LLC [Member]

Loss Contingencies [Line Items]

Settlement amount

38,000,000

MGM Resorts International [Member] | Completion guarantee [Member]

Loss Contingencies [Line Items]

Amount funded under completion guarantee

747,000,000

747,000,000

MGM Resorts International [Member] | CityCenter Holdings, LLC [Member] | Completion guarantee [Member]

Loss Contingencies [Line Items]

Estimated obligation offset by condominium proceeds

58,000,000

58,000,000

MGM Resorts International [Member] | CityCenter Holdings, LLC [Member] | Perini construction agreement [Member] | Completion guarantee [Member]

Loss Contingencies [Line Items]

Estimated obligation offset by condominium proceeds

58,000,000

58,000,000

Completion guarantee liability

149,000,000

149,000,000

MGM Resorts International [Member] | Subsequent Event [Member] | CityCenter Holdings, LLC [Member] | Perini construction agreement [Member] | Completion guarantee [Member]

Loss Contingencies [Line Items]

Amount funded under completion guarantee

130,000,000

Las Vegas Arena Company, LLC [Member]

Loss Contingencies [Line Items]

Payments to acquire equity method investments

76,000,000

Las Vegas Arena Company, LLC [Member] | Maximum [Member] | Anschutz Entertainment Group, Inc [Member]

Loss Contingencies [Line Items]

Other commitment for construction

175,000,000

175,000,000

M G M Grand Paradise Senior Credit Facility | Standby Letters of Credit | Senior credit facility [Member] | Letters of credit [Member]

Loss Contingencies [Line Items]

Amount that can be issued

100,000,000

100,000,000

Mgm Springfield [Member]

Loss Contingencies [Line Items]

Percentage of total investment proposed into interest-bearing account

10.00%

10.00%

Percentage of secure deposit on capital investment

10.00%

10.00%

Mgm Springfield [Member] | Surety Bond | Scenario, Forecast [Member]

Loss Contingencies [Line Items]

Expected amount on surety deposit bond

52,000,000

52,000,000

Mgm Springfield [Member] | Massachusetts [Member] | Scenario, Forecast [Member]

Loss Contingencies [Line Items]

Area of development site (in acres)

14.5

14.5

Cotai Land Concession Contract [Member]

Loss Contingencies [Line Items]

Rental expense for operating leases

7,000,000

7,000,000

Cotai Land Concession Contract [Member] | MGM Grand Paradise SA [Member]

Loss Contingencies [Line Items]

Initial term of contract

25 years

Payable for land concession contract

161,000,000

Remaining number of semi-annual payments

8

Cotai Land Concession Contract [Member] | MGM Grand Paradise SA [Member] | Macau [Member]

Loss Contingencies [Line Items]

Area of development site (in acres)

18

18

Cotai Land Concession Contract [Member] | MGM China [Member]

Loss Contingencies [Line Items]

Contract premium, recorded within other long-term assets

100,000,000

100,000,000

Cotai Land Concession Contract [Member] | MGM China [Member] | Subsequent Event [Member]

Loss Contingencies [Line Items]

Payable for land concession contract

59,000,000

Remaining number of semi-annual payments

4

Cash Paid For Fourth Semi Annual Payment Of Contractual Obligations

$15,000,000

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Mar. 31, 2013	Feb. 28, 2015
Stockholders Equity Note [Line Items]
Distributions to noncontrolling interest owners	$386,709,000	$318,348,000	$206,806,000
MGM China [Member]
Stockholders Equity Note [Line Items]
Dividend remained within the consolidated entity				70,000,000	65,000,000	254,000,000	58,000,000	255,000,000
Distributions to noncontrolling interest owners				67,000,000	62,000,000	245,000,000	55,000,000	245,000,000
Percentage ownership interest	51.00%
MGM China [Member] | Interim Dividend [Member]
Stockholders Equity Note [Line Items]
Dividends paid				137,000,000			113,000,000
MGM China [Member] | Final Dividend [Member]
Stockholders Equity Note [Line Items]
Dividends paid					127,000,000
MGM China [Member] | Final Dividend [Member] | Subsequent Event [Member]
Stockholders Equity Note [Line Items]
Dividends recommended									120,000,000
Dividends recommended, parent portion									61,000,000
MGM China [Member] | Special Dividend [Member]
Stockholders Equity Note [Line Items]
Dividends paid						499,000,000		500,000,000
MGM China [Member] | Special Dividend [Member] | Subsequent Event [Member]
Stockholders Equity Note [Line Items]
Dividends declared									400,000,000
Dividend remained within the consolidated entity									$204,000,000

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended	1 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
MGM China [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds related to the exercise of share-based awards	$2
Expenses to repurchase common stock for cancelation	3
Bonus PSU Policy [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		300,000
Granted, target price (in dollars per share)		$31.72
Omnibus Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares to be issued	45,000,000
Number of shares available for grant as share-based awards	23,000,000
Omnibus Plan [Member] | Stock Options and SARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized compensation	34
Weighted-average period over which compensation cost is expected to be recognized	1 year 8 months 12 days
Omnibus Plan [Member] | Stock Options and SARs [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of award	10 years
Omnibus Plan [Member] | SARs [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of award	7 years
Vesting period	4 years
Omnibus Plan [Member] | RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized compensation	20
Weighted-average period over which compensation cost is expected to be recognized	1 year 8 months 12 days
Granted (in shares)	603,000
Omnibus Plan [Member] | RSUs [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Omnibus Plan [Member] | PSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years
Ending average price that must equal target price, defined as a percentage of beginning average stock price	125.00%
Shares issued	0
Period of average closing price of common stock on which beginning and ending prices are based	60 days
Unamortized compensation	12
Weighted-average period over which compensation cost is expected to be recognized	1 year 7 months 6 days
Granted (in shares)	400,000
Granted, target price (in dollars per share)	$29.80
Omnibus Plan [Member] | PSUs [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capped payout as a percentage of the target award	160.00%
Omnibus Plan [Member] | PSUs [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ending price required for issuance of shares as a percentage of target price	60.00%
MGM China Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years
Intrinsic value of share-based awards exercised	2
MGM China Plan [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Number of shares available for grant as share-based awards	339,000,000
Unamortized compensation	$19
Weighted-average period over which compensation cost is expected to be recognized	3 years
Business days immediately preceding the offer date for which average closing price is considered	5 days
MGM China Plan [Member] | Stock Options [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of award	10 years
Shares issuable upon exercise as percentage of issued shares as of plan approval date	10.00%

StockBased_Compensation_Summar

Stock-Based Compensation - Summary of Stock Options and Stock Appreciation Rights Activity (Detail) (Omnibus Plan [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014
Omnibus Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at the beginning of the period (in shares)	16,074
Granted (in shares)	2,385
Exercised (in shares)	-1,837
Forfeited or expired (in shares)	-446
Outstanding at the end of the period (in shares)	16,176
Vested and expected to vest at the end of the period (in shares)	15,796
Exercisable at the end of the period (in shares)	10,750
Outstanding at the beginning of the period (in dollars per share)	$15.22
Granted (in dollars per share)	$22.29
Exercised (in dollars per share)	$14.68
Forfeited or expired (in dollars per share)	$48.95
Outstanding at the end of the period (in dollars per share)	$15.27
Vested and expected to vest at the end of the period (in dollars per share)	$15.14
Exercisable at the end of the period (in dollars per share)	$14.10
Outstanding at the end of the period	3 years 6 months 11 days
Vested and expected to vest at the end of the period	3 years 5 months 19 days
Exercisable at the end of the period	2 years 5 months 5 days
Outstanding at the end of the period (in dollars)	$121,194
Vested and expected to vest at the end of the period (in dollars)	120,676
Exercisable at the end of the period (in dollars)	$98,485

StockBased_Compensation_Schedu

Stock-Based Compensation - Schedule of Restricted Stock Units and Performance Share Units (Detail) (Omnibus Plan [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested at the beginning of the period (in shares)	1,339,000
Granted (in shares)	603,000
Vested (in shares)	-552,000
Forfeited (in shares)	-32,000
Nonvested at the end of the period (in shares)	1,358,000
Nonvested at the beginning of the period (in dollars per share)	$13.85
Granted (in dollars per share)	$22.51
Vested (in dollars per share)	$12.39
Forfeited (in dollars per share)	$14.73
Nonvested at the end of the period (in dollars per share)	$18.27
PSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested at the beginning of the period (in shares)	1,055,000
Granted (in shares)	400,000
Nonvested at the end of the period (in shares)	1,455,000	1,055,000
Nonvested at the beginning of the period (in dollars per share)	$13.91
Granted (in dollars per share)	$18.39	$21.01	$10.03
Nonvested at the end of the period (in dollars per share)	$15.14	$13.91
Nonvested at the beginning of period, Weighted Average Target Price (in dollars per share)	$16.95
Granted, Weighted Average Target Price (in dollars per share)	$29.80
Nonvested at the end of period, Weighted Average Target Price (in dollars per share)	$20.48	$16.95

StockBased_Compensation_Schedu1

Stock-Based Compensation - Schedule of Additional Information Related to Stock Options, SARs and RSUs (Detail) (Omnibus Plan [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Omnibus Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of share-based awards exercised or RSUs vested	$31,613	$28,880	$6,451
Income tax benefit from share-based awards exercised or RSUs vested	$10,805	$9,975	$2,236

StockBased_Compensation_Summar1

Stock-Based Compensation - Summary of Stock Option Activity (Detail) (MGM China Plan [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014
MGM China Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at the beginning of the period (in shares)	16,916
Granted (in shares)	19,920
Exercised (in shares)	-988
Forfeited or expired (in shares)	-790
Outstanding at the end of the period (in shares)	35,058
Vested and expected to vest at the end of the period (in shares)	33,065
Exercisable at the end of the period (in shares)	10,223
Outstanding at the beginning of the period (in dollars per share)	$2.06
Granted (in dollars per share)	$3.47
Exercised (in dollars per share)	$1.98
Forfeited or expired (in dollars per share)	$2.67
Outstanding at the end of the period (in dollars per share)	$2.85
Vested and expected to vest at the end of the period (in dollars per share)	$2.82
Exercisable at the end of the period (in dollars per share)	$2.02
Outstanding at the end of the period	8 years 1 month 24 days
Vested and expected to vest at the end of the period	8 years 29 days
Exercisable at the end of the period	6 years 4 months 28 days
Outstanding at the end of the period (in dollars)	$8,084
Vested and expected to vest at the end of the period (in dollars)	8,022
Exercisable at the end of the period (in dollars)	$5,506

StockBased_Compensation_Schedu2

Stock-Based Compensation - Schedule of Compensation Cost Recognized (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Compensation cost	$38,368	$33,422	$43,428
Less: Reimbursed costs and other	-1,104	-1,090	-3,868
Compensation cost recognized as expense	37,264	32,332	39,560
Less: Related tax benefit	-9,822		-1,660
Compensation expense, net of tax benefit	27,442	32,332	37,900
Omnibus Plan [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Compensation cost	29,662	27,201	37,588
MGM China Plan [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Compensation cost	$8,706	$6,221	$5,840

StockBased_Compensation_Weight

Stock-Based Compensation - Weighted Average Assumptions Utilized for SARs Grants (Detail) (Omnibus Plan [Member], SARs [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Omnibus Plan [Member] | SARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility (as a percent)	40.00%	54.00%	65.00%
Expected term	4 years 10 months 24 days	4 years 10 months 24 days	5 years
Expected dividend yield (as a percent)	0.00%	0.00%	0.00%
Risk-free interest rate (as a percent)	1.60%	1.60%	0.70%
Weighted-average fair value of SARs granted (in dollars per share)	$8.18	$9.44	$5.60

StockBased_Compensation_Weight1

Stock-Based Compensation - Weighted Average Assumptions Utilized for PSUs (Detail) (Omnibus Plan [Member], PSUs [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Omnibus Plan [Member] | PSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility (as a percent)	31.00%	40.00%	49.00%
Expected term	3 years	3 years	3 years
Expected dividend yield (as a percent)	0.00%	0.00%	0.00%
Risk-free interest rate (as a percent)	1.00%	0.60%	0.40%
Weighted-average fair value of PSUs granted (in dollars per share)	$18.39	$21.01	$10.03

StockBased_Compensation_Weight2

Stock-Based Compensation - Weighted Average Assumptions Utilized for Stock Option Grants (Detail) (MGM China Plan [Member], Stock Options [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
MGM China Plan [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility (as a percent)	39.00%	46.00%	60.00%
Expected term	7 years 10 months 24 days	8 years	8 years
Expected dividend yield (as a percent)	1.60%	1.20%	0.00%
Risk-free interest rate (as a percent)	1.80%	1.70%	2.10%
Weighted-average fair value of options granted (in dollars per share)	$1.06	$1.39	$1.13

Employee_Benefit_Plans_Table_O

Employee Benefit Plans - Table Outlining Company's Participation in Pension Plan (Detail) (Southern Nevada Culinary and Bartenders Pension Plan [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Southern Nevada Culinary and Bartenders Pension Plan [Member]
Multiemployer Plans [Line Items]
Employer identification number	886016617
Pension plan number	1
Pension Protection Act Zone Status		Green	Green
Expiration Date of Collective Bargaining Agreements, First	12-Nov-14
Expiration Date of Collective Bargaining Agreements, Last	31-May-18

Employee_Benefit_Plans_Table_O1

Employee Benefit Plans - Table Outlining Company's Participation in Pension Plan (Parenthetical) (Detail) (Multiemployer Benefit Plans [Member])	12 Months Ended
	Dec. 31, 2014
	Agreement
	Employee
Multiemployer Benefit Plans [Member]
Multiemployer Plans [Line Items]
Number of collective-bargaining agreements that require contributions to the Pension Plan	10
Number of employees covered under collective-bargaining agreement	4,300
Collective-bargaining agreement expiration year	2014

Employee_Benefit_Plans_Schedul

Employee Benefit Plans - Schedule of Contributions of Company's Multiemployer Pension Plans and Other Multiemployer Benefit Plans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Multiemployer Pension Plans [Member]
Multiemployer Plans [Line Items]
Contributions	$41,250	$45,971	$43,639
Multiemployer Pension Plans [Member] | Southern Nevada Culinary and Bartenders Pension Plan [Member]
Multiemployer Plans [Line Items]
Contributions	33,927	37,691	35,556
Multiemployer Pension Plans [Member] | Other pension plans not individually significant [Member]
Multiemployer Plans [Line Items]
Contributions	7,323	8,280	8,083
Multiemployer Benefit Plans Other Than Pensions [Member]
Multiemployer Plans [Line Items]
Contributions	215,387	182,861	176,625
Multiemployer Benefit Plans Other Than Pensions [Member] | UNITE HERE Health [Member]
Multiemployer Plans [Line Items]
Contributions	202,641	167,494	162,453
Multiemployer Benefit Plans Other Than Pensions [Member] | Other benefit plans [Member]
Multiemployer Plans [Line Items]
Contributions	$12,746	$15,367	$14,172

Employee_Benefit_Plans_Additio

Employee Benefit Plans - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2008	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Percentage increase in hours worked by employees			3.00%
Liability for health care claims		$20	$19
Workers compensation liability		48	42
Amount of charges recorded for 401(k) contributions		17	13	12
Employee contribution limit per calendar year as a percentage of compensation		30.00%
Maximum retirement benefit as a percentage of participant's estimated average annual salary	65.00%
Period for estimated average annual salary to provide a retirement benefit	5 years
Vesting, plan participation only portion, plan participation period		3 years
Vesting, plan participation and continuous service portion, plan participation period		5 years
Vesting, plan participation and continuous service portion, continuous service period		10 years
Contributions to retirement plan		$5	$5	$4
Bellagio Aria Mandalay Bay and MGM Grand Las Vegas [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Minimum percentage of total contributions to be listed in Pension Plan's Forms 5500			5.00%	5.00%

Property_Transactions_Net_Sche

Property Transactions, Net - Schedule of Property Transactions, Net (Detail) (USD $)	0 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Other property transactions, net						$12,213	$23,290	$25,065
Property transactions, net						41,002	124,761	696,806
Grand Victoria [Member]
Property, Plant and Equipment [Line Items]
Investment impairment charge	85,000	29,000	37,000	29,000	37,000	28,789	36,607	85,009
Corporate Buildings [Member]
Property, Plant and Equipment [Line Items]
Corporate buildings impairment charges			44,510				44,510
Other Nevada Land [Member]
Property, Plant and Equipment [Line Items]
Real estate impairment charges							20,354
North Las Vegas Strip Land [Member]
Property, Plant and Equipment [Line Items]
Real estate impairment charges								366,406
Atlantic City Land [Member]
Property, Plant and Equipment [Line Items]
Real estate impairment charges								166,569
Borgata Trust [Member]
Property, Plant and Equipment [Line Items]
Impairment charges on cost method investments								$53,757

Property_Transactions_Net_Addi

Property Transactions, Net - Additional Information (Detail) (USD $)	12 Months Ended		3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013	Dec. 31, 2014
		acre		acre
Other Nevada Land [Member]
Property, Plant and Equipment [Line Items]
Real estate impairment charges	$20,354,000
Estimated fair value	24,000,000
Other Nevada Land [Member] | Jean Nevada [Member]
Property, Plant and Equipment [Line Items]
Area of land (in acres)				170
Other Nevada Land [Member] | Sloan Nevada [Member]
Property, Plant and Equipment [Line Items]
Area of land (in acres)				89
North Las Vegas Strip Land [Member]
Property, Plant and Equipment [Line Items]
Area of land (in acres)		33.5
Real estate impairment charges		366,406,000
North Las Vegas Strip Land [Member] | Nonrecurring Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 and 3 [Member]
Property, Plant and Equipment [Line Items]
Estimated fair value		214,000,000
Atlantic City Land [Member]
Property, Plant and Equipment [Line Items]
Area of land (in acres)		86
Real estate impairment charges		166,569,000
Atlantic City Land [Member] | Nonrecurring Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 and 3 [Member]
Property, Plant and Equipment [Line Items]
Estimated fair value		125,000,000
Corporate Buildings [Member]
Property, Plant and Equipment [Line Items]
Corporate buildings impairment charges	$44,510,000		$44,510,000
Las Vegas Arena Company, LLC [Member]
Property, Plant and Equipment [Line Items]
Percentage ownership interest			50.00%

Segment_Information_Additional

Segment Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
	Segment
	Region
Segment Reporting [Abstract]
Number of geographic regions, where principal operating activities of the entity occur	2
Number of reportable segments	2

Segment_Information_Schedule_o

Segment Information - Schedule of Segment Information (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net Revenues	$2,385,546	$2,485,007	$2,581,033	$2,630,398	$2,513,213	$2,463,037	$2,481,265	$2,352,148	$10,081,984	$9,809,663	$9,160,844
Other operating expense
Preopening and start-up expenses									-39,257	-13,314	-2,127
Property transactions, net									-41,002	-124,761	-696,806
Depreciation and amortization									-815,765	-849,225	-927,697
Operating income	266,113	286,489	354,464	416,472	330,134	262,797	235,753	308,597	1,323,538	1,137,281	121,351
Non-operating income (expense)
Interest expense, net of amounts capitalized									-817,061	-857,347	-1,116,358
Non-operating items from unconsolidated affiliates									-87,794	-208,682	-130,845
Other, net									-7,797	-9,062	-608,361
Total non-operating income (expense)									-912,652	-1,075,091	-1,855,564
Income (loss) before income taxes									410,886	62,190	-1,734,213
Benefit (provision) for income taxes									-283,708	-20,816	117,301
Net income (loss)	-287,472	50,382	178,168	186,100	22,407	33,171	-36,401	22,197	127,178	41,374	-1,616,912
Less: Net income attributable to noncontrolling interests									-277,051	-213,108	-150,779
Net loss attributable to MGM Resorts International	-342,263	-20,270	110,008	102,652	-56,805	-22,313	-98,781	6,165	-149,873	-171,734	-1,767,691
Total assets	26,702,511				26,084,610				26,702,511	26,084,610
Property and equipment, net	14,441,542				14,055,212				14,441,542	14,055,212
Capital expenditures									872,041	562,124	422,763
Reportable segments [Member]
Segment Reporting Information [Line Items]
Net Revenues									9,624,413	9,369,572	8,740,467
Adjusted Property EBITDA									2,368,778	2,256,795	2,004,565
Non-operating income (expense)
Total assets	22,179,686				22,355,461				22,179,686	22,355,461
Property and equipment, net	13,256,991				12,745,649				13,256,991	12,745,649
Capital expenditures									639,801	470,663	338,537
Reportable segments [Member] | Wholly Owned Domestic Resorts [Member]
Segment Reporting Information [Line Items]
Net Revenues									6,342,084	6,052,644	5,932,791
Adjusted Property EBITDA									1,518,307	1,442,686	1,325,220
Non-operating income (expense)
Total assets	13,336,737				13,151,719				13,336,737	13,151,719
Property and equipment, net	11,933,559				11,787,880				11,933,559	11,787,880
Capital expenditures									292,463	216,147	258,519
Reportable segments [Member] | MGM China [Member]
Segment Reporting Information [Line Items]
Net Revenues									3,282,329	3,316,928	2,807,676
Adjusted Property EBITDA									850,471	814,109	679,345
Reportable segments [Member] | MGM China [Member]
Non-operating income (expense)
Total assets	8,842,949				9,203,742				8,842,949	9,203,742
Property and equipment, net	1,323,432				957,769				1,323,432	957,769
Capital expenditures									347,338	254,516	80,018
Corporate and other [Member]
Segment Reporting Information [Line Items]
Net Revenues									457,571	440,091	420,377
Other operating expense
Corporate and other, net									-149,216	-132,214	-256,584
Non-operating income (expense)
Total assets	4,545,448				3,750,839				4,545,448	3,750,839
Property and equipment, net	1,207,174				1,331,253				1,207,174	1,331,253
Capital expenditures									233,173	107,442	89,935
Intersegment Eliminations
Non-operating income (expense)
Total assets	-22,623				-21,690				-22,623	-21,690
Property and equipment, net	-22,623				-21,690				-22,623	-21,690
Capital expenditures									($933)	($15,981)	($5,709)

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
MGM China [Member] | Brand License Agreement [Member]
Related Party Transaction [Line Items]
License fee as percentage of MGM China consolidated net revenue	1.75%
Per annum percentage increase in development fee annual cap	20.00%
MGM China [Member] | Development services agreement [Member]
Related Party Transaction [Line Items]
Per annum percentage increase in development fee annual cap	10.00%
Development fee as percentage of project cost	2.63%
Development fees	$0	$15	$6
MGM China [Member] | Maximum [Member] | Brand License Agreement [Member]
Related Party Transaction [Line Items]
License fee cap	43
MGM China [Member] | Maximum [Member] | Development services agreement [Member]
Related Party Transaction [Line Items]
Development fees	24
MGM China [Member] | Shun Tak [Member]
Related Party Transaction [Line Items]
Expenses incurred	28	18	13
MGM China [Member] | Shun Tak [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Revenue related to hotel rooms provided	1	1	1
MGM China [Member] | Ms. Pansy Ho [Member] | Brand License Agreement [Member]
Related Party Transaction [Line Items]
License fees initial year annual cap	43	36	30
MGM Branding and Development [Member] | Ms. Pansy Ho [Member]
Related Party Transaction [Line Items]
Distribution made to noncontrolling interests	13	18	11
CityCenter Holdings, LLC [Member]
Related Party Transaction [Line Items]
Annual management fee	38	38	32
CityCenter Holdings, LLC [Member] | Aria and Vdara [Member]
Related Party Transaction [Line Items]
Management fee as a percentage of revenue	2.00%
Management fee received, percentage of EBITDA	5.00%
CityCenter Holdings, LLC [Member] | Crystals [Member]
Related Party Transaction [Line Items]
Annual management fee	3
CityCenter Holdings, LLC [Member] | Management Services and Reimbursable Costs [Member]
Related Party Transaction [Line Items]
Reimbursable costs for support services provided	380	364	355
Receivable related to management services and reimbursable costs	45	49
CityCenter Holdings, LLC [Member] | Aircraft Agreement [Member]
Related Party Transaction [Line Items]
Reimbursable costs for support services provided	3	3	3
Las Vegas Arena Company, LLC [Member]
Related Party Transaction [Line Items]
Operating leases term of contract	50 years
Accrued investment income receivable	$1

Consolidating_Condensed_Financ2

Consolidating Condensed Financial Information - Schedule of Condensed Consolidating Balance Sheet Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Condensed Balance Sheet Statements, Captions [Line Items]
Current assets	$3,027,160	$2,719,439
Property and equipment, net	14,441,542	14,055,212
Investments in and advances to unconsolidated affiliates	1,559,034	1,469,261
Other non-current assets	7,674,775	7,840,698
Total assets	26,702,511	26,084,610
Current liabilities	3,407,925	2,215,328
Deferred income taxes, net	2,621,860	2,419,967
Long-term debt	12,913,882	13,447,230
Other long-term obligations	130,570	141,590
Total liabilities	19,074,237	18,224,115
MGM Resorts stockholders' equity	4,090,917	4,216,051
Noncontrolling interests	3,537,357	3,644,444
Total stockholders' equity	7,628,274	7,860,495	8,116,016	9,882,222
Total liabilities and stockholders' equity	26,702,511	26,084,610
Parent [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Current assets	1,390,806	494,296
Investments in subsidiaries	20,430,160	19,991,695
Other non-current assets	141,035	167,552
Total assets	21,962,001	20,653,543
Current liabilities	1,680,319	340,343
Intercompany accounts	1,932,780	1,446,952
Deferred income taxes, net	2,312,828	2,110,229
Long-term debt	11,907,534	12,441,112
Other long-term obligations	37,623	98,856
Total liabilities	17,871,084	16,437,492
MGM Resorts stockholders' equity	4,090,917	4,216,051
Total stockholders' equity	4,090,917	4,216,051
Total liabilities and stockholders' equity	21,962,001	20,653,543
Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Current assets	868,688	903,537
Property and equipment, net	12,445,086	12,552,828
Investments in subsidiaries	3,896,365	4,037,168
Investments in and advances to unconsolidated affiliates	1,526,446	1,461,496
Intercompany accounts	2,175,090
Other non-current assets	414,801	422,259
Total assets	21,326,477	19,377,288
Current liabilities	953,179	959,118
Intercompany accounts		-1,470,305
Long-term debt	4,837	4,836
Other long-term obligations	58,016	41,758
Total liabilities	1,016,032	-464,593
MGM Resorts stockholders' equity	20,310,445	19,841,881
Total stockholders' equity	20,310,445	19,841,881
Total liabilities and stockholders' equity	21,326,477	19,377,288
Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Current assets	768,335	1,322,170
Property and equipment, net	2,008,428	1,514,356
Investments in and advances to unconsolidated affiliates	7,588	7,765
Other non-current assets	7,118,939	7,250,887
Total assets	9,903,290	10,095,178
Current liabilities	775,097	941,431
Intercompany accounts	242,311	23,353
Deferred income taxes, net	309,032	309,738
Long-term debt	1,001,511	1,001,282
Other long-term obligations	34,931	976
Total liabilities	2,362,882	2,276,780
MGM Resorts stockholders' equity	4,003,051	4,173,954
Noncontrolling interests	3,537,357	3,644,444
Total stockholders' equity	7,540,408	7,818,398
Total liabilities and stockholders' equity	9,903,290	10,095,178
Elimination [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Current assets	-669	-564
Property and equipment, net	-11,972	-11,972
Investments in subsidiaries	-24,326,525	-24,028,863
Investments in and advances to unconsolidated affiliates	25,000
Intercompany accounts	-2,175,090
Total assets	-26,489,257	-24,041,399
Current liabilities	-670	-25,564
Intercompany accounts	-2,175,091
Total liabilities	-2,175,761	-25,564
MGM Resorts stockholders' equity	-24,313,496	-24,015,835
Total stockholders' equity	-24,313,496	-24,015,835
Total liabilities and stockholders' equity	($26,489,257)	($24,041,399)

Consolidating_Condensed_Financ3

Consolidating Condensed Financial Information - Schedule of Condensed Consolidating Statement of Operations and Comprehensive Income Information (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Income Statements, Captions [Line Items]
Net Revenues	$2,385,546	$2,485,007	$2,581,033	$2,630,398	$2,513,213	$2,463,037	$2,481,265	$2,352,148	$10,081,984	$9,809,663	$9,160,844
Expenses
Casino and hotel operations									6,368,698	6,258,716	5,921,282
General and administrative									1,318,749	1,278,450	1,239,774
Corporate expense									238,811	216,745	235,007
Preopening and start-up expenses									39,257	13,314	2,127
Property transactions, net									41,002	124,761	696,806
Depreciation and amortization									815,765	849,225	927,697
Total expenses									8,822,282	8,741,211	9,022,693
Income (loss) from unconsolidated affiliates									63,836	68,829	-16,800
Operating income (loss)	266,113	286,489	354,464	416,472	330,134	262,797	235,753	308,597	1,323,538	1,137,281	121,351
Interest expense, net of amounts capitalized									-817,061	-857,347	-1,116,358
Other, net									-95,591	-217,744	-739,206
Income (loss) before income taxes									410,886	62,190	-1,734,213
Benefit (provision) for income taxes									-283,708	-20,816	117,301
Net income (loss)	-287,472	50,382	178,168	186,100	22,407	33,171	-36,401	22,197	127,178	41,374	-1,616,912
Less: Net income attributable to noncontrolling interests									-277,051	-213,108	-150,779
Net loss attributable to MGM Resorts International	-342,263	-20,270	110,008	102,652	-56,805	-22,313	-98,781	6,165	-149,873	-171,734	-1,767,691
Net income (loss)	-287,472	50,382	178,168	186,100	22,407	33,171	-36,401	22,197	127,178	41,374	-1,616,912
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment									-1,293	-3,993	17,124
Other									1,250	115	-445
Other comprehensive income (loss)									-43	-3,878	16,679
Comprehensive income (loss)									127,135	37,496	-1,600,233
Less: Comprehensive income attributable to noncontrolling interests									-276,520	-211,030	-159,133
Comprehensive loss attributable to MGM Resorts International									-149,385	-173,534	-1,759,366
Parent [Member]
Condensed Income Statements, Captions [Line Items]
Equity in subsidiaries' earnings									938,712	638,030	-210,934
Expenses
Casino and hotel operations									5,482	5,644	7,623
General and administrative									4,743	4,432	7,101
Corporate expense									72,116	66,307	66,285
Total expenses									82,341	76,383	81,009
Operating income (loss)									856,371	561,647	-291,943
Interest expense, net of amounts capitalized									-794,826	-805,933	-1,053,692
Other, net									50,793	39,524	-526,606
Income (loss) before income taxes									112,338	-204,762	-1,872,241
Benefit (provision) for income taxes									-262,211	33,028	104,550
Net income (loss)									-149,873	-171,734	-1,767,691
Net loss attributable to MGM Resorts International									-149,873	-171,734	-1,767,691
Net income (loss)									-149,873	-171,734	-1,767,691
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment									-762	-1,915	8,770
Other									1,250	115	-445
Other comprehensive income (loss)									488	-1,800	8,325
Comprehensive income (loss)									-149,385	-173,534	-1,759,366
Comprehensive loss attributable to MGM Resorts International									-149,385	-173,534	-1,759,366
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net Revenues									6,270,708	5,955,001	5,782,523
Equity in subsidiaries' earnings									339,312	289,384	220,354
Expenses
Casino and hotel operations									3,810,711	3,622,940	3,615,288
General and administrative									1,089,192	1,051,757	1,025,028
Corporate expense									150,938	125,500	168,863
Preopening and start-up expenses									5,384	4,205	1,486
Property transactions, net									36,612	126,773	693,519
Depreciation and amortization									500,401	522,900	519,074
Total expenses									5,593,238	5,454,075	6,023,258
Income (loss) from unconsolidated affiliates									64,014	68,807	-16,861
Operating income (loss)									1,080,796	859,117	-37,242
Interest expense, net of amounts capitalized									-574	-6,333	-10,986
Other, net									-90,679	-212,065	-178,026
Income (loss) before income taxes									989,543	640,719	-226,254
Benefit (provision) for income taxes									-20,735	11,111	1,892
Net income (loss)									968,808	651,830	-224,362
Net loss attributable to MGM Resorts International									968,808	651,830	-224,362
Net income (loss)									968,808	651,830	-224,362
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment									-762	-1,915	8,770
Other									1,250	115	-445
Other comprehensive income (loss)									488	-1,800	8,325
Comprehensive income (loss)									969,296	650,030	-216,037
Comprehensive loss attributable to MGM Resorts International									969,296	650,030	-216,037
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net Revenues									3,813,736	3,856,728	3,379,891
Expenses
Casino and hotel operations									2,554,965	2,632,198	2,299,941
General and administrative									224,814	222,261	207,645
Corporate expense									15,757	41,938	7,859
Preopening and start-up expenses									33,873	9,109	641
Property transactions, net									4,390	-2,012	3,287
Depreciation and amortization									315,364	326,325	408,623
Total expenses									3,149,163	3,229,819	2,927,996
Income (loss) from unconsolidated affiliates									-178	22	61
Operating income (loss)									664,395	626,931	451,956
Interest expense, net of amounts capitalized									-21,661	-45,081	-51,680
Other, net									-55,705	-45,203	-34,574
Income (loss) before income taxes									587,029	536,647	365,702
Benefit (provision) for income taxes									-762	-64,955	10,859
Net income (loss)									586,267	471,692	376,561
Less: Net income attributable to noncontrolling interests									-277,051	-213,108	-150,779
Net loss attributable to MGM Resorts International									309,216	258,584	225,782
Net income (loss)									586,267	471,692	376,561
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment									-1,293	-3,993	17,124
Other comprehensive income (loss)									-1,293	-3,993	17,124
Comprehensive income (loss)									584,974	467,699	393,685
Less: Comprehensive income attributable to noncontrolling interests									-276,520	-211,030	-159,133
Comprehensive loss attributable to MGM Resorts International									308,454	256,669	234,552
Elimination [Member]
Condensed Income Statements, Captions [Line Items]
Net Revenues									-2,460	-2,066	-1,570
Equity in subsidiaries' earnings									-1,278,024	-927,414	-9,420
Expenses
Casino and hotel operations									-2,460	-2,066	-1,570
Corporate expense										-17,000	-8,000
Total expenses									-2,460	-19,066	-9,570
Operating income (loss)									-1,278,024	-910,414	-1,420
Income (loss) before income taxes									-1,278,024	-910,414	-1,420
Net income (loss)									-1,278,024	-910,414	-1,420
Net loss attributable to MGM Resorts International									-1,278,024	-910,414	-1,420
Net income (loss)									-1,278,024	-910,414	-1,420
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment									1,524	3,830	-17,540
Other									-1,250	-115	445
Other comprehensive income (loss)									274	3,715	-17,095
Comprehensive income (loss)									-1,277,750	-906,699	-18,515
Comprehensive loss attributable to MGM Resorts International									($1,277,750)	($906,699)	($18,515)

Consolidating_Condensed_Financ4

Consolidating Condensed Financial Information - Schedule of Condensed Consolidating Statement of Cash Flows Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities
Net cash provided by (used in) operating activities	$1,130,670	$1,310,448	$909,351
Cash flows from investing activities
Capital expenditures, net of construction payable	-872,041	-562,124	-422,763
Dispositions of property and equipment	7,651	18,030	426
Investments in and advances to unconsolidated affiliates	-103,040	-28,953	-54,300
Distributions from unconsolidated affiliates in excess of earnings	132	110	1,723
Investments in treasury securities - maturities longer than 90 days	-123,133	-219,546	-285,469
Proceeds from treasury securities - maturities longer than 90 days	210,300	252,592	315,438
Cash deposits - original maturities longer than 90 days	-570,000
Payments for gaming licenses	-85,000	-21,600
Other	10,981	1,354	-1,472
Net cash used in investing activities	-1,524,150	-560,137	-446,417
Cash flows from financing activities
Net borrowings (repayments) under bank credit facilities b maturities of 90 days or less	-28,000	-28,000	1,779,262
Borrowings under bank credit facilities b maturities longer than 90 days	5,171,250	2,793,000	1,350,000
Repayments under bank credit facilities b maturities longer than 90 days	-5,171,250	-2,793,000	-3,634,128
Issuance of senior notes	1,250,750	500,000	4,100,000
Retirement of senior notes, including premiums paid	-508,900	-612,262	-4,009,117
Debt issuance costs	-13,681	-23,576	-160,245
Distributions to noncontrolling interest owners	-386,709	-318,348	-206,806
Other	-5,383	-7,522	-5,925
Net cash provided by (used in) financing activities	308,077	-489,708	-786,959
Effect of exchange rate on cash	-889	-443	1,621
Cash and cash equivalents
Net increase (decrease) for the period	-86,292	260,160	-322,404
Cash related to assets held for sale	-3,662
Balance, beginning of period	1,803,669	1,543,509	1,865,913
Balance, end of period	1,713,715	1,803,669	1,543,509
Parent [Member]
Cash flows from operating activities
Net cash provided by (used in) operating activities	-718,756	-819,282	-952,653
Cash flows from investing activities
Investments in and advances to unconsolidated affiliates	-31,400	-23,600	-46,800
Cash deposits - original maturities longer than 90 days	-570,000
Other			-1,973
Net cash used in investing activities	-601,400	-23,600	-48,773
Cash flows from financing activities
Net borrowings (repayments) under bank credit facilities b maturities of 90 days or less	-28,000	-28,000	1,331,500
Borrowings under bank credit facilities b maturities longer than 90 days	3,821,250	2,343,000
Repayments under bank credit facilities b maturities longer than 90 days	-3,821,250	-2,343,000	-1,834,128
Issuance of senior notes	1,250,750	500,000	4,100,000
Retirement of senior notes, including premiums paid	-508,900	-462,226	-4,009,117
Debt issuance costs	-13,681	-23,576	-119,197
Intercompany accounts	1,045,048	985,465	996,462
Other	-4,213	-4,506	-5,035
Net cash provided by (used in) financing activities	1,741,004	967,157	460,485
Cash and cash equivalents
Net increase (decrease) for the period	420,848	124,275	-540,941
Balance, beginning of period	378,660	254,385	795,326
Balance, end of period	799,508	378,660	254,385
Guarantor Subsidiaries [Member]
Cash flows from operating activities
Net cash provided by (used in) operating activities	1,121,013	1,089,341	989,144
Cash flows from investing activities
Capital expenditures, net of construction payable	-375,719	-311,635	-332,089
Dispositions of property and equipment	6,631	11,648	191
Investments in and advances to unconsolidated affiliates	-46,640	-5,353	-7,500
Distributions from unconsolidated affiliates in excess of earnings	132	110	1,723
Investments in treasury securities - maturities longer than 90 days	-123,133	-219,546	-285,469
Proceeds from treasury securities - maturities longer than 90 days	210,300	252,592	315,438
Intercompany accounts	-704,785
Other	10,981	1,354	501
Net cash used in investing activities	-1,022,233	-270,830	-307,205
Cash flows from financing activities
Retirement of senior notes, including premiums paid		-150,036
Intercompany accounts	-76,117	-657,260	-685,752
Other	-803		-833
Net cash provided by (used in) financing activities	-76,920	-807,296	-686,585
Cash and cash equivalents
Net increase (decrease) for the period	21,860	11,215	-4,646
Cash related to assets held for sale	-3,662
Balance, beginning of period	237,457	226,242	230,888
Balance, end of period	255,655	237,457	226,242
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities
Net cash provided by (used in) operating activities	703,413	1,040,389	872,860
Cash flows from investing activities
Capital expenditures, net of construction payable	-496,322	-250,489	-90,674
Dispositions of property and equipment	1,020	6,382	235
Payments for gaming licenses	-85,000	-21,600
Net cash used in investing activities	-580,302	-265,707	-90,439
Cash flows from financing activities
Net borrowings (repayments) under bank credit facilities b maturities of 90 days or less			447,762
Borrowings under bank credit facilities b maturities longer than 90 days	1,350,000	450,000	1,350,000
Repayments under bank credit facilities b maturities longer than 90 days	-1,350,000	-450,000	-1,800,000
Debt issuance costs			-41,048
Intercompany accounts	-264,146	-328,205	-310,710
Distributions to noncontrolling interest owners	-386,709	-318,348	-206,806
Other	-367	-3,016	-57
Net cash provided by (used in) financing activities	-651,222	-649,569	-560,859
Effect of exchange rate on cash	-889	-443	1,621
Cash and cash equivalents
Net increase (decrease) for the period	-529,000	124,670	223,183
Balance, beginning of period	1,187,552	1,062,882	839,699
Balance, end of period	658,552	1,187,552	1,062,882
Elimination [Member]
Cash flows from operating activities
Net cash provided by (used in) operating activities	25,000
Cash flows from investing activities
Investments in and advances to unconsolidated affiliates	-25,000
Intercompany accounts	704,785
Net cash used in investing activities	679,785
Cash flows from financing activities
Intercompany accounts	-704,785
Net cash provided by (used in) financing activities	($704,785)

Selected_Quarterly_Financial_R2

Selected Quarterly Financial Results (Unaudited) - Schedule of Selected Quarterly Financial Results (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$2,385,546	$2,485,007	$2,581,033	$2,630,398	$2,513,213	$2,463,037	$2,481,265	$2,352,148	$10,081,984	$9,809,663	$9,160,844
Operating income	266,113	286,489	354,464	416,472	330,134	262,797	235,753	308,597	1,323,538	1,137,281	121,351
Net income (loss)	-287,472	50,382	178,168	186,100	22,407	33,171	-36,401	22,197	127,178	41,374	-1,616,912
Net income (loss) attributable to MGM Resorts International	($342,263)	($20,270)	$110,008	$102,652	($56,805)	($22,313)	($98,781)	$6,165	($149,873)	($171,734)	($1,767,691)
Basic income (loss) per share	($0.70)	($0.04)	$0.22	$0.21	($0.12)	($0.05)	($0.20)	$0.01	($0.31)	($0.35)	($3.62)
Diluted income (loss) per share	($0.70)	($0.04)	$0.22	$0.20	($0.12)	($0.05)	($0.20)	$0.01	($0.31)	($0.35)	($3.62)

Selected_Quarterly_Financial_R3

Selected Quarterly Financial Results - Additional Information (Detail) (USD $)	12 Months Ended		3 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended	1 Months Ended	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2014	Oct. 31, 2013	Dec. 31, 2013	Dec. 31, 2014	Sep. 30, 2013
Selected Quarterly Financial Results (Unaudited)
Loss on retirement of long-term debt	$3,801,000	$563,292,000
Corporate Buildings [Member]
Selected Quarterly Financial Results (Unaudited)
Corporate buildings impairment charges	44,510,000		44,510,000
Impact of real estate impairment charges on diluted loss per share			$0.06
Grand Victoria [Member]
Selected Quarterly Financial Results (Unaudited)
Investment impairment charge	36,607,000	85,009,000	37,000,000	85,000,000	29,000,000	29,000,000	37,000,000	28,789,000
Impact of equity method investment impairment charges on diluted loss per share	$0.05		$0.05		$0.04			$0.04
Percentage ownership interest			50.00%	50.00%	50.00%	50.00%	50.00%	50.00%			50.00%
Grand Victoria [Member] | Corporate Buildings [Member]
Selected Quarterly Financial Results (Unaudited)
Impact of real estate impairment charges on diluted loss per share	$0.06
CityCenter Holdings, LLC [Member]
Selected Quarterly Financial Results (Unaudited)
Percentage ownership interest	50.00%							50.00%		50.00%	50.00%
Loss on retirement of long-term debt									70,000,000	70,000,000
Impact of loss on retirement of debt on diluted loss per share	$0.09									$0.09
CityCenter Holdings, LLC [Member] | Harmon [Member]
Selected Quarterly Financial Results (Unaudited)
Percentage ownership interest		50.00%						50.00%			50.00%
Property transactions settlement charge											18,000,000
Impact of litigation settlement charge on diluted earnings per share								$0.02			$0.02
Jean and Sloan, Nevada [Member]
Selected Quarterly Financial Results (Unaudited)
Impact of real estate impairment charges on diluted loss per share	$0.03											$0.03
Real estate impairment charges												26,000,000
Silver Legacy [Member]
Selected Quarterly Financial Results (Unaudited)
Percentage ownership interest								50.00%			50.00%
Share of (gain) loss on retirement of debt										($12,000,000)
Gain on retirement of debt, per share	$0.02									$0.02

Schedule_II_Valuation_and_Qual1

Schedule II - Valuation and Qualifying Accounts (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Movement in Valuation Allowances And Reserves [Roll Forward]
Balance at Beginning of Period	$81,713
Provision for Doubtful Accounts	46,698	14,969	57,068
Balance at End of Period	89,602	81,713
Allowance for doubtful accounts [Member]
Movement in Valuation Allowances And Reserves [Roll Forward]
Balance at Beginning of Period	81,713	97,911	101,207
Provision for Doubtful Accounts	46,698	14,969	57,068
Write-offs, Net of Recoveries	-38,809	-31,167	-60,364
Balance at End of Period	89,602	81,713	97,911
Deferred income tax valuation allowance [Member]
Movement in Valuation Allowances And Reserves [Roll Forward]
Balance at Beginning of Period	1,721,917	1,093,398	72,001
Increase	836,850	633,423	1,023,644
Decrease		-4,904	-2,247
Balance at End of Period	$2,558,767	$1,721,917	$1,093,398