MGM Resorts International (MGM) 10-Q 11 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Aug. 04, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Trading Symbol	'MGM	'
Entity Registrant Name	'MGM Resorts International	'
Entity Central Index Key	'0000789570	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	490,741,383

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$1,365,137	$1,803,669
Accounts receivable, net	473,922	488,217
Inventories	102,524	107,907
Deferred income taxes, net	'	80,989
Prepaid expenses and other	224,732	238,657
Total current assets	2,166,315	2,719,439
Property and equipment, net	14,113,722	14,055,212
Other assets	'	'
Investments in and advances to unconsolidated affiliates	1,420,924	1,374,836
Goodwill	2,898,861	2,897,442
Other intangible assets, net	4,396,436	4,511,861
Other long-term assets, net	576,045	551,395
Total other assets	9,292,266	9,335,534
Total assets	25,572,303	26,110,185
Current liabilities	'	'
Accounts payable	253,475	241,192
Income taxes payable	32,817	14,813
Current portion of long-term debt	317,194	'
Deferred income taxes, net	1,522	'
Accrued interest on long-term debt	191,141	188,522
Other accrued liabilities	1,764,167	1,770,801
Total current liabilities	2,560,316	2,215,328
Deferred income taxes	2,356,998	2,430,414
Long-term debt	12,606,520	13,447,230
Other long-term obligations	106,941	141,590
Commitments and contingencies (Note 5)	'	'
Stockholders' equity	'	'
Common stock, $.01 par value: authorized 1,000,000,000 shares; issued and outstanding 490,712,807 and 490,360,628 shares	4,907	4,904
Capital in excess of par value	4,166,365	4,156,680
Retained earnings	270,796	57,092
Accumulated other comprehensive income	15,235	12,503
Total MGM Resorts International stockholders' equity	4,457,303	4,231,179
Noncontrolling interests	3,484,225	3,644,444
Total stockholders' equity	7,941,528	7,875,623
Total liabilities and stockholders' equity	$25,572,303	$26,110,185

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 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	490,712,807	490,360,628
Common stock, outstanding shares	490,712,807	490,360,628

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues	'	'	'	'
Casino	$1,475,165	$1,443,157	$3,058,597	$2,844,577
Rooms	463,151	437,710	915,537	838,960
Food and beverage	412,723	394,247	796,115	754,129
Entertainment	138,735	121,001	272,512	234,855
Retail	50,811	52,748	95,427	97,455
Other	134,068	127,914	259,495	251,740
Reimbursed costs	95,745	92,741	190,720	182,977
Total revenues, gross	2,770,398	2,669,518	5,588,403	5,204,693
Less: Promotional allowances	-189,365	-188,253	-376,972	-371,280
Total revenues, net	2,581,033	2,481,265	5,211,431	4,833,413
Expenses	'	'	'	'
Casino	916,817	916,807	1,907,651	1,792,053
Rooms	142,413	134,001	276,651	261,710
Food and beverage	241,124	225,696	461,182	430,436
Entertainment	104,761	89,940	203,698	173,665
Retail	26,055	27,865	49,531	53,831
Other	92,077	92,819	179,654	178,792
Reimbursed costs	95,745	92,741	190,720	182,977
General and administrative	327,484	314,324	646,730	618,225
Corporate expense	54,439	52,364	107,790	98,988
Preopening and start-up expenses	9,759	3,506	15,395	5,652
Property transactions, net	33,170	88,131	33,728	96,622
Depreciation and amortization	203,070	218,151	410,725	430,069
Total expenses	2,246,914	2,256,345	4,483,455	4,323,020
Income from unconsolidated affiliates	5,868	6,682	24,644	23,026
Operating income	339,987	231,602	752,620	533,419
Non-operating income (expense):	'	'	'	'
Interest expense, net of amounts capitalized	-203,936	-214,500	-413,323	-439,947
Non-operating items from unconsolidated affiliates	-14,578	-38,864	-28,301	-60,943
Other, net	-309	-4,951	-1,743	-6,233
Total non-operating income (expense)	-218,823	-258,315	-443,367	-507,123
Income (loss) before income taxes	121,164	-26,713	309,253	26,296
Benefit (provision) for income taxes	52,540	-3,865	56,059	-34,296
Net income (loss)	173,704	-30,578	365,312	-8,000
Less: Net income attributable to noncontrolling interests	-68,160	-62,380	-151,608	-78,412
Net income (loss) attributable to MGM Resorts International	$105,544	($92,958)	$213,704	($86,412)
Net income (loss) per share of common stock attributable to MGM Resorts International	'	'	'	'
Basic	$0.22	($0.19)	$0.44	($0.18)
Diluted	$0.21	($0.19)	$0.42	($0.18)

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]	'	'	'	'
Net income (loss)	$173,704	($30,578)	$365,312	($8,000)
Other comprehensive income (loss), net of tax:	'	'	'	'
Foreign currency translation adjustment	5,862	6,416	3,102	-6,225
Other	'	'	1,250	115
Other comprehensive income (loss)	5,862	6,416	4,352	-6,110
Comprehensive income (loss)	179,566	-24,162	369,664	-14,110
Less: Comprehensive income attributable to noncontrolling interests	-71,023	-65,470	-153,228	-75,297
Comprehensive income (loss) attributable to MGM Resorts International	$108,543	($89,632)	$216,436	($89,407)

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities	'	'
Net income (loss)	$365,312	($8,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'
Depreciation and amortization	410,725	430,069
Amortization of debt discounts, premiums and issuance costs	18,728	16,876
Loss on retirement of long-term debt	'	3,791
Provision for doubtful accounts	24,294	16,696
Stock-based compensation	16,600	16,555
Property transactions, net	33,728	96,622
Loss from unconsolidated affiliates	3,777	38,293
Distributions from unconsolidated affiliates	7,260	8,075
Deferred income taxes	-3,052	69,143
Change in operating assets and liabilities:	'	'
Accounts receivable	-9,964	-13,703
Inventories	5,391	6,456
Income taxes receivable and payable, net	18,005	5,420
Prepaid expenses and other	-2,605	-30,646
Prepaid Cotai land concession premium	-11,206	3,289
Accounts payable and accrued liabilities	-78,514	98,230
Other	5,145	-27,104
Net cash provided by operating activities	803,624	730,062
Cash flows from investing activities	'	'
Capital expenditures, net of construction payable	-370,248	-242,878
Dispositions of property and equipment	412	323
Investments in and advances to unconsolidated affiliates	-53,750	-14,400
Distributions from unconsolidated affiliates in excess of earnings	790	'
Investments in treasury securities - maturities longer than 90 days	-93,137	-120,332
Proceeds from treasury securities - maturities longer than 90 days	111,238	135,268
Other	2,535	1,806
Net cash provided by (used in) investing activities	-402,160	-240,213
Cash flows from financing activities	'	'
Net repayments under bank credit facilities - maturities of 90 days or less	-1,737,750	-14,000
Borrowings under bank credit facilities - maturities longer than 90 days	3,451,875	2,793,000
Repayments under bank credit facilities - maturities longer than 90 days	-1,728,125	-2,793,000
Retirement of senior notes	-508,900	-462,234
Debt issuance costs	'	-17,061
Distributions to noncontrolling interest owners	-314,447	-259,016
Other	-2,173	-1,687
Net cash provided by (used in) financing activities	-839,520	-753,998
Effect of exchange rate on cash	-476	-687
Cash and cash equivalents	'	'
Net increase (decrease) for the period	-438,532	-264,836
Balance, beginning of period	1,803,669	1,543,509
Balance, end of period	1,365,137	1,278,673
Supplemental cash flow disclosures	'	'
Interest paid, net of amounts capitalized	391,976	436,147
Federal, state and foreign income taxes paid, net of refunds	8,508	1,382
Non-cash investing and financing activities	'	'
Increase in investment in and advances to CityCenter related to change in completion guarantee liability	$42,922	$43,271

Organization

Organization	6 Months Ended
	Jun. 30, 2014
Accounting Policies [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, primarily 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. Along with its local partners, 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 17.8 acre site in Cotai, Macau (“MGM Cotai”). MGM Cotai will be an integrated casino, hotel and entertainment complex with up to 1,600 hotel rooms, 500 gaming tables and 2,500 slots. The total estimated project budget is $2.9 billion, excluding development fees eliminated in consolidation, capitalized interest and land.
	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 3 for additional information related to CityCenter.
	The Company 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 LLC.
	The Company seeks to leverage its management expertise and well-recognized brands through domestic and international expansion opportunities. The Company has entered into management agreements for 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. The Company will contribute 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. In addition, the Company will continue to develop and manage properties in the greater China region with Diaoyutai State Guesthouse, including the MGM Grand Sanya on Hainan Island, in the People’s Republic of China, which opened in 2012.
	The Maryland Video Lottery Facility Location Commission has awarded MGM National Harbor, LLC (“MGM National Harbor”) the license to build and operate a destination resort casino in Prince George’s County at National Harbor. Currently, 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; high end branded retail; fine and casual dining; a dedicated 3,000 seat theater venue; 35,000 square feet of meeting and event space; and a 5,000 space parking garage.
	On June 13, 2014, the Massachusetts Gaming Commission (the “MGC”) agreed to award the Company’s subsidiary developing MGM Springfield the Category One casino license in Region B, Western Massachusetts, one of three licensing regions designated by legislation. However, on June 24, 2014, the Massachusetts Supreme Judicial Court ruled that a proposed ballot initiative seeking to prohibit local casinos, slot parlors and other wagering in Massachusetts was constitutional and thereby allowed the ballot initiative to appear on the November 4, 2014 ballot. The MGC has agreed that the Company is not required to make the final award payment of licensing fees and other costs unless the ballot initiative fails to pass in the November 2014 elections.
	MGM Springfield is proposed to be developed on 14.5 acres of land between Union and State streets, and Columbus Avenue and Main Street in Springfield, Massachusetts. The cost to develop and construct MGM Springfield is currently expected to be approximately $690 million, excluding capitalized interest and land related costs. The Company expects the resort will include a casino with approximately 3,000 slots and 75 table games, a poker room and high limit VIP gambling area, 250 hotel rooms, 55,000 square feet of retail and restaurant space that will accommodate 15 shops and restaurants, and a multi-level parking garage.
	In 2013, the Company entered into an agreement with a subsidiary of Anschutz Entertainment Group, Inc. (“AEG”) (a leader in sports, entertainment, and promotions) to design, construct, and operate an 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 the developer of the arena. The proposed arena is anticipated to seat between 18,000 – 20,000 people and is currently scheduled to be completed in 2016. Such development is estimated to cost approximately $350 million, excluding capitalized interest and land related costs, and is contingent on obtaining permanent financing.
	The Company has two reportable segments: wholly owned domestic resorts and MGM China. See Note 10 for additional information about the Company’s segments.
	Borgata. The Company has a 50% economic interest in 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. The Company’s interest is held in trust and was offered for sale pursuant to its amended settlement agreement with the New Jersey Division of Gaming Enforcement and approved by the New Jersey Casino Control Commission (“CCC”). The terms of the amended settlement agreement previously mandated the sale by March 2014. The Company had the right to direct the sale through March 2013 (the “divesture period”), subject to approval of the CCC, and the trustee was responsible for selling the trust property during the following 12-month period (the “terminal sale period”). On February 13, 2013, the settlement agreement was further amended to allow the Company to re-apply to the CCC for licensure in New Jersey and to defer expiration of these periods pending the outcome of the licensure process. The Company has submitted its licensure request to the CCC and there can be no assurances that such request will be approved or with respect to the timing of the licensure process. If the CCC denies the Company’s licensure request, then the divesture period will immediately end, and the terminal sale period will immediately begin, which will result in the Company’s Borgata interest being disposed of by the trustee pursuant to the terms of the settlement agreement.
	The Company consolidates the trust because it is the sole economic beneficiary and accounts for its interest in Borgata under the cost method. The Company reviews its investment carrying value whenever indicators of impairment exist. As of June 30, 2014, the trust had $86 million of cash and investments, of which $69 million is held in U.S. treasury securities with maturities greater than three months but less than one year, and is recorded within “Prepaid expenses and other.”

Basis_of_Presentation_and_Sign

Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation and Significant Accounting Policies	'
	NOTE 2— BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES
	Basis of presentation. As permitted by the rules and regulations of the Securities and Exchange Commission, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted. These consolidated financial statements should be read in conjunction with the Company’s 2013 annual consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.
	In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments, which include only normal recurring adjustments, necessary to present fairly the Company’s interim financial statements. The results for such periods are not necessarily indicative of the results to be expected for the full year.
	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 2 inputs to measure the fair value of the Company’s treasury securities held by the Borgata trust. See Note 1;
		•	The Company uses Level 1 inputs for its long-term debt fair value disclosures. See Note 4; and
		•	The Company used Level 3 inputs when assessing the fair value of its investment in Grand Victoria at June 30, 2014 and 2013. See Note 3.
	Income tax provision. For interim income tax reporting the Company estimates its annual effective tax rate and applies it to its year-to-date ordinary income. The tax effects of unusual or infrequently occurring items, including changes in judgment about valuation allowances and effects of changes in tax laws or rates are reported in the interim period in which they occur. The Company’s effective income tax rate was (43.4%) and (18.1%) for the three months and six months ended June 30, 2014, respectively.
	The Company recognizes deferred tax assets, net of applicable reserves, related to tax loss and credit carryforwards and other temporary differences with a future tax benefit to the extent that realization of such benefit is more likely than not. Otherwise, a valuation allowance is applied. Because of the Company’s history of recent losses in the United States, the Company does not rely on future United States sourced operating income in assessing the realization of its deferred tax assets.
	Because MGM China 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 the Company’s current five-year exemption from the Macau 12% complementary tax on gaming profits ends on December 31, 2016, the Company believes it will be entitled to receive a third five-year exemption from Macau based upon exemptions granted to the Company’s competitors in order to ensure non-discriminatory treatment among gaming concessionaires and subconcessionaires. For all periods beyond December 31, 2021, the Company has assumed that it 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 has factored that assumption into both the measurement of its foreign deferred tax assets and liabilities as well as its future projections of foreign sourced income. As a result, the Company projects that it will be able to realize a benefit, and hence, projects that it will record a deferred tax asset for foreign tax credits, net of valuation allowance (“net deferred foreign tax credit asset”), of approximately $335 million as of December 31, 2014 and has reflected this assumption in its annual effective tax rate for 2014. Should the Company in a future period actually receive or be able to assume under the law a fourth five-year exemption, an additional valuation allowance would likely need to be provided on some portion or all of the net deferred foreign tax credit asset, resulting in an increase in the provision for income taxes in such period.
	During the quarter ended June 30, 2014 the Company received final approval from the Joint Committee on Taxation of the results of IRS examinations covering its 2005 through 2009 tax years. These examinations are now considered settled for financial reporting purposes. Consequently, the Company reduced unrecognized tax benefits by $81 million and recorded income tax benefit of $31 million to reflect the effects of this settlement. The Company previously made a deposit of $30 million with the IRS to cover the expected cash taxes and interest resulting from the tentatively agreed adjustments for these examinations and does not expect to make any further cash payments as a result of this final settlement. Since the tax and interest had not been assessed by the end of the second quarter, the deposit is included in “Prepaid expenses and other” while the expected amount of the assessment is included in “Income taxes payable” on the balance sheet at June 30, 2014.
	Recently issued accounting standards. During the six months ended June 30, 2014, the Company implemented Financial Accounting Standards Board (“FASB”) Accounting Standards Update No. 2013-11 (“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 in the six months ended June 30, 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 of adopting this new accounting guidance will have on its consolidated financial statements and footnote disclosures.

Investments_in_and_Advances_to

Investments in and Advances to Unconsolidated Affiliates	6 Months Ended
	Jun. 30, 2014
Equity Method Investments And Joint Ventures [Abstract]	'
Investments in and Advances to Unconsolidated Affiliates	'
	NOTE 3 — INVESTMENTS IN AND ADVANCES TO UNCONSOLIDATED AFFILIATES
	Investments in and advances to unconsolidated affiliates consisted of the following:
		June 30,			December 31,
		2014			2013
		(In thousands)
	CityCenter Holdings, LLC – CityCenter (50%)	$	1,226,940		$	1,172,087
	Elgin Riverboat Resort–Riverboat Casino – Grand Victoria (50%)		140,000			169,579
	Other		53,984			33,170
		$	1,420,924		$	1,374,836
	The Company recorded its share of the results of operations of unconsolidated affiliates as follows:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(In thousands)
	Income from unconsolidated affiliates	$	5,868		$	6,682		$	24,644		$	23,026
	Preopening and start-up expenses		(101	)		—			(120	)		(376	)
	Non-operating items from unconsolidated affiliates		(14,578	)		(38,864	)		(28,301	)		(60,943	)
		$	(8,811	)	$	(32,182	)	$	(3,777	)	$	(38,293	)
	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 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 recorded an impairment charge of $37 million on its investment in Grand Victoria based on the then estimated fair value of $170 million for its 50% interest.
	City Center
	CityCenter summary financial information. Summarized balance sheet information for CityCenter is as follows:
		June 30,			December 31,
		2014			2013
		(In thousands)
	Current assets	$	494,634		$	451,058
	Property and other assets, net		8,070,612			8,261,240
	Current liabilities		511,485			462,487
	Long-term debt and other long-term obligations		1,552,353			1,688,113
	Equity		6,501,408			6,561,698
	Summarized income statement information for CityCenter is as follows:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(In thousands)
	Net revenues	$	319,875		$	333,174		$	656,292		$	648,316
	Operating expenses		(344,710	)		(356,948	)		(676,164	)		(672,258	)
	Operating loss		(24,835	)		(23,774	)		(19,872	)		(23,942	)
	Non-operating expenses		(26,953	)		(101,992	)		(52,118	)		(169,667	)
	Net loss	$	(51,788	)	$	(125,766	)	$	(71,990	)	$	(193,609	)

LongTerm_Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Long-Term Debt	'
	NOTE 4 — LONG-TERM DEBT
	Long-term debt consisted of the following:
		June 30,			December 31,
		2014			2013
		(In thousands)
	Senior credit facility:
	$2,758 million ($2,772 million at December 31, 2013) term loans, net	$	2,751,575		$	2,765,041
	MGM Grand Paradise credit facility		553,520			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		1,453,795			1,456,153
	$875 million 6.625% senior notes, due 2015, net		875,701			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		497,459			496,987
	$743 million 7.625% senior notes, due 2017		743,000			743,000
	$475 million 11.375% senior notes, due 2018, net		468,178			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
	$0.6 million 7% debentures, due 2036, net		572			572
	$4.3 million 6.7% debentures, due 2096		4,265			4,265
			12,923,714			13,447,230
	Less: Current portion		(317,194	)		—
		$	12,606,520		$	13,447,230
	As of June 30, 2014, the amount available under the Company’s revolving senior credit facility is less than current maturities related to the Company’s term loan credit facilities and convertible senior notes. The Company has excluded from the current portion of long-term debt the amount available for refinancing under its revolving credit facility.
	Senior credit facility. At June 30, 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 June 30, 2014). The term loan B facility bears interest at LIBOR plus 2.50%, with a LIBOR floor of 1.00%. 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 $7 million and $14 million in the three and six months ended June 30, 2014, respectively, in accordance with the scheduled amortization. The Company had $1.2 billion of available borrowing capacity under its senior credit facility at June 30, 2014. At June 30, 2014, the interest rate on the term loan A was 2.9%, the interest rate on the term loan B was 3.5%.
	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 to maintain a minimum trailing four-quarter EBITDA and limits the ability of the Company and its restricted subsidiaries to make capital expenditures and investments. As of June 30, 2014, the Company and its restricted subsidiaries are required to maintain a minimum EBITDA (as defined in the senior credit facility) of $1.10 billion. The minimum EBITDA increases to $1.20 billion for September 30, 2014 and December 31, 2014 and to $1.25 billion for March 31, 2015 and June 30, 2015, with periodic increases thereafter. EBITDA for the trailing four quarters ended June 30, 2014, calculated in accordance with the terms of the senior credit facility, was $1.38 billion. The senior credit facility limits the Company and its restricted subsidiaries 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 Company’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 Company’s ability to make investments subject to certain thresholds and other important exceptions. As of June 30, 2014, the Company and its restricted subsidiaries were within the limit of capital expenditures and other investments for the calendar year 2014.
	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 China credit facility. At June 30, 2014, the MGM China 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 June 30, 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 June 30, 2014. MGM China is a joint and several co-borrower with MGM Grand Paradise. The MGM China 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 amended facilities; the material subsidiaries of MGM China continue to guarantee the facilities. The credit facility will be used for general corporate purposes and for the development of the Cotai project.
	The MGM China 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 its credit facility covenants at June 30, 2014.
	Senior notes. The Company repaid its $509 million 5.875% senior notes in February 2014 at maturity.
	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.
	Fair value of long-term debt. The estimated fair value of the Company’s long-term debt at June 30, 2014 was $14.7 billion. At December 31, 2013, the estimated fair value of the Company’s long-term debt was $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.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	NOTE 5 — COMMITMENTS AND CONTINGENCIES
	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 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. The complaint further charged the defendants with failure to provide timely and complete design documents, late delivery to Perini of design changes, mismanagement of the change order process, obstruction of Perini’s ability to complete the Harmon component, and fraudulent inducement of Perini to compromise significant amounts due for its general conditions. The complaint advanced claims for breach of contract, breach of the implied covenant of good faith and fair dealing, tortious breach of the implied covenant of good faith and fair dealing, unjust enrichment and promissory estoppel, and fraud and intentional misrepresentation. Perini seeks compensatory damages, punitive damages, attorneys’ fees and costs.
	In April 2010, Perini served an amended complaint in this case which joins 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.
	The CityCenter Owners and the other defendants dispute Perini’s allegations and contend that the defendants are entitled to substantial amounts from Perini, including offsets against amounts claimed to be owed to Perini and its subcontractors and damages based on breach of their contractual and other duties to CityCenter, duplicative payment requests, non-conforming work, lack of proof of alleged work performance, defective work related to the Harmon, property damage and Perini’s failure to perform its obligations to pay certain subcontractors and to prevent filing of liens against CityCenter. Parallel to the court litigation, CityCenter management conducted an extra-judicial program for settlement of CityCenter subcontractor claims. CityCenter has resolved 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), with only three remaining for further proceedings along with trial of Perini’s claims and CityCenter’s Harmon-related counterclaim and other claims by CityCenter against Perini and its parent guarantor, Tutor Perini. Two of the remaining subcontractors are implicated in the defective work at the Harmon. In August 2013, Perini recorded an amended notice of lien reducing its lien to approximately $167 million.
	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).
	In 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, which settlement has been approved by the court. In April 2014, CityCenter settled for $55 million, net of deductible, its 2008 builder’s risk insurance claim for loss and damage with respect to the Harmon’s defective condition.
	Further, CityCenter and Perini have entered a settlement agreement which resolves most but not all of the components of Perini’s non-Harmon-related lien claim against CityCenter. The settlement established a stipulated value for Perini’s mechanic’s lien, which amount will not be paid until resolution of CityCenter’s damages claim for the Harmon and will be offset against any judgment CityCenter obtains against Perini for damages relating to construction of the Harmon. Pursuant to the parties’ stipulation, on February 24, 2014, Perini filed a revised lien for $174 million as the amount claimed by Perini and the remaining Harmon-related subcontractors. The discovery process continues. Trial of the remainder of Perini’s lien claim, the remaining subcontractors’ claims against CityCenter, and CityCenter’s counterclaims against Perini and certain subcontractors for defective work at the Harmon has been rescheduled to commence on September 23, 2014.
	CityCenter Owners and the other defendants will continue to vigorously assert and protect their interests in the Perini lawsuit. The Company believes it is probable that the CityCenter Owners and the other defendants will be liable for $170 million in connection with the non-Harmon settlement agreement and remaining claims in this lawsuit. Amounts determined to be owed would be funded in part under the Company’s completion guarantee which is discussed below. The Company does not believe it is reasonably possible it will be liable for any material amount in excess of its estimate of its probable liability. The Company’s estimate of its probable liability does not include any offset for amounts that may be recovered on its counterclaims against Perini and certain subcontractors for defective work at the Harmon.
	Please see below for further discussion on the Company’s completion guarantee obligation which may be impacted by the outcome of the above litigation and CityCenter’s extra-judicial settlement process.
	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 undeveloped 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 June 30, 2014, CityCenter is holding approximately $72 million in a separate bank account representing the remaining condo proceeds available to fund completion guarantee obligations or be reimbursed to the Company. In accordance with the amended and restated completion guarantee such amounts may only be used to fund construction lien obligations or to reimburse the Company once the Perini litigation is settled.
	As of June 30, 2014, the Company has funded $727 million under the completion guarantee and has accrued a liability of $128 million, which includes estimated litigation costs related to the resolution of disputes with contractors concerning the final construction costs and estimated amounts to be paid to contractors in connection with the Perini litigation. The Company’s estimated obligation has been offset by the $72 million of condominium proceeds received and held in escrow by CityCenter, which are available to fund construction lien claims upon final resolution of the Perini litigation. Also, the Company’s accrual reflects certain estimated offsets to the amounts claimed by the contractors. The Company does not believe it is reasonably possible it could be liable for amounts in excess of what it has accrued related to the Perini Litigation claims. However, an insurer participating in the OCIP for the CityCenter construction project has initiated an arbitration against the Company in an attempt to recover certain costs it has allegedly incurred in connection with CityCenter’s claims against Perini and certain subcontractors for defective work at the Harmon. The Company disputes that such amounts are owed to the insurance company, but believes it is reasonably possible it may ultimately be found liable for some portion of the claim. The arbitration is in its beginning phase and there are significant factual and legal issues to be determined and resolved. Further, the Company has not had the opportunity to engage in any discovery, and the amount of damages to be sought by the insurer is indeterminate. Because of these factors, the Company does not currently have sufficient information to determine a range of reasonably possible loss.
	Harmon demolition. In response to a request by the Clark County Building Division (the “Building Division”), CityCenter engaged an engineer to conduct an analysis, based on all available information, as to the structural stability of the Harmon under building-code-specified load combinations. On July 11, 2011, that engineer submitted the results of his analysis of the Harmon tower and podium in its current as-built condition. The engineer opined, among other things, that “[i]n a code-level earthquake, using either the permitted or current code specified loads, it is likely that critical structural members in the tower will fail and become incapable of supporting gravity loads, leading to a partial or complete collapse of the tower. There is missing or misplaced reinforcing steel in columns, beams, shear walls, and transfer walls throughout the structure of the tower below the twenty-first floor.” Based on this engineering opinion, the Building Division requested a plan of action from CityCenter. CityCenter informed the Building Division that it decided to abate the potential for structural collapse of the Harmon in the event of a code-level earthquake by demolishing the building, and enclosed a plan of action for demolition by implosion prepared by LVI Environmental Services of Nevada, Inc (“LVI”). CityCenter also advised that prior to undertaking the demolition plan of action, it would seek relief from a standing order of the district court judge presiding over the Perini litigation that prohibits alteration or destruction of the building without court approval. In addition, CityCenter supplied the foundational data for the engineering conclusions stated in the July 11, 2011 letter declaring the Harmon’s structural instability in the event of a code-level earthquake. On November 22, 2011, the Building Division required that CityCenter submit a plan to abate the code deficiencies discovered in the Harmon tower.
	In December 2011, CityCenter resubmitted to the Building Division the plan of abatement action prepared by LVI which was first submitted on August 15, 2011, and met with the Building Division about the requirements necessary to obtain demolition permits and approvals. As discussed above, the timing of the demolition of the Harmon is subject to rulings in the Perini litigation.
	The district court presiding over the Perini litigation had previously granted CityCenter’s motion to demolish the Harmon, but stayed the demolition to allow CityCenter an opportunity to conduct additional Phase 4 destructive testing at the Harmon following the court’s order prohibiting CityCenter’s structural engineering expert from extrapolating the results of pre-Phase 4 testing to untested portions of the building.
	In May 2013, CityCenter completed additional Phase 4 destructive testing of 468 structural elements at the Harmon, analysis of which data confirmed the existence of a wide variety of construction defects throughout the Harmon tower. In his June 2013 expert report CityCenter’s structural engineer opined that the additional test results and extrapolation thereof to untested portions of the building show that after a service-level earthquake (typically defined as an earthquake with a 50% chance of occurring in 30 years), the Harmon can be expected to sustain extensive damage and failure of many structural elements, and in a large earthquake, such as a building code-level earthquake, critical elements of the Harmon are likely to fail and lead to a partial or complete collapse of the tower. In April 2013, Perini’s structural engineering expert John A. Martin & Associates (“JAMA”) had sent a letter to the Building Division which declared in part that JAMA no longer believes that the Harmon Tower can be repaired to a code compliant structure, which condition JAMA attributed to CityCenter’s building testing. On July 18, 2013 CityCenter filed a renewed motion with the district court for permission to demolish the Harmon. On August 23, 2013, the court granted CityCenter’s motion, and CityCenter commenced planning for demolition of the building. On January 31, 2014, the court revoked its prior authorization of demolition of the Harmon, without prejudice to renewal of the application, on the grounds that CityCenter’s non-party builder’s risk insurer requested further testing in the building. That request for further testing was withdrawn pursuant to the insurer’s settlement of CityCenter’s Harmon 2008 policy claim. On April 22, 2014 the court granted CityCenter’s renewed application for permission to demolish the Harmon. The Clark County Building Department has issued the first in a series of permits required for demolition of this building. CityCenter has commenced a controlled deconstruction of the Harmon structure in accordance with the standards set by its expert consultants and the Clark County Building Department.
	The Company does not believe it would be responsible for funding any additional amounts under the completion guarantee that might be required with respect to the Harmon; however, the Company’s view is based on a number of developing factors, including with respect to on-going litigation with CityCenter’s contractors and other developments related to the CityCenter venture, all of which are subject to change.
	Cotai land concession contract. MGM Grand Paradise’s land concession contract for an approximate 17.8 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 June 30, 2014, MGM China had paid $86 million of the contract premium recorded within “Other long-term assets, net”. In July 2014, MGM China paid the third semi-annual installment payment of $15 million under the land concession contract. Including interest on the five remaining semi-annual payments, MGM China has $73 million remaining payable for the land concession contract. In addition, MGM Grand Paradise is required to pay the Macau government approximately $269,000 per year in rent during the course of development of the land and approximately $681,000 per year in rent once the development is completed. The annual rent is subject to review by the Macau government every five years. Under the terms of the land concession contract, MGM Grand Paradise is required to complete the development of the land by January 2018.
	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 June 30, 2014, the Company had provided $35 million of letters of credit. MGM China’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 June 30, 2014, MGM China had provided $39 million of letters of credit under its credit facility.
	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.

Income_Loss_Per_Share_of_Commo

Income (Loss) Per Share of Common Stock	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Income (Loss) Per Share of Common Stock	'
	NOTE 6 — INCOME (LOSS) PER SHARE OF COMMON STOCK
	The weighted-average number of common and common equivalent shares used in the calculation of basic and diluted income (loss) per share consisted of the following:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(In thousands)
	Numerator:
	Net income (loss) attributable to MGM Resorts International—basic	$	105,544		$	(92,958	)	$	213,704		$	(86,412	)
	Interest on convertible debt, net of tax		2,103			—			4,298			—
	Potentially dilutive effect due to MGM China share option plan		(84	)		—			(213	)		—
	Net income (loss) attributable to MGM Resorts International—diluted	$	107,563		$	(92,958	)	$	217,789		$	(86,412	)
	Denominator:
	Weighted-average common shares outstanding—basic		490,786			489,484			490,692			489,388
	Potential dilution from share-based awards		6,436			—			6,446			—
	Potential dilution from assumed conversion of convertible debt		16,149			—			16,149			—
	Weighted-average common and common equivalent shares—diluted		513,371			489,484			513,287			489,388
	Antidilutive share-based awards excluded from the calculation of diluted earnings per share		2,534			18,498			2,580			18,498
	For the three and six months ended June 30, 2014, potential dilution from the assumed conversion of convertible debt relates to the $300 million 4.25% senior convertible notes issued in June 2011. The $1.15 billion 4.25% senior convertible notes issued in April 2010 were excluded from the three and six months ended June 30, 2014 calculation of diluted earnings per share as their effect would be antidilutive.

Stockholders_Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Stockholders' Equity	'
	NOTE 7 — STOCKHOLDERS’ EQUITY
	MGM China dividends. MGM China paid 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, and 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.
	MGM China paid 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.
	On August 5, 2014, MGM China’s board of directors announced a dividend of $136 million, which will be paid to shareholders of record as of August 25, 2014 and distributed on or about September 1, 2014. The Company will receive $69 million, representing its 51% share of the dividend.
	Supplemental equity information. The following table presents the Company’s changes in stockholders’ equity for the six months ended June 30, 2014:
		MGM Resorts			Noncontrolling			Total
		International			Interests			Stockholders’
		Stockholders’						Equity
		Equity
		(In thousands)
	Balances, January 1, 2014	$	4,231,179		$	3,644,444		$	7,875,623
	Net income		213,704			151,608			365,312
	Foreign currency translation adjustment		1,482			1,620			3,102
	Other comprehensive income from unconsolidated affiliate, net		1,250			—			1,250
	Stock-based compensation		15,450			1,684			17,134
	Change in excess tax benefit from stock-based compensation		(9,263	)		—			(9,263	)
	Issuance of MGM Resorts common stock pursuant to stock-based compensation awards		(3,751	)		—			(3,751	)
	Cash distributions to noncontrolling interest owners		—			(314,865	)		(314,865	)
	Issuance of performance share units		7,529			—			7,529
	Other		(277	)		(266	)		(543	)
	Balances, June 30, 2014	$	4,457,303		$	3,484,225		$	7,941,528
	Accumulated other comprehensive income (loss). Changes in accumulated other comprehensive income (loss) by component are as follows:
		Foreign			Other			Total
		Currency			Adjustments
		Translation
		Adjustment
		(In thousands)
	Balances, January 1, 2014	$	13,082		$	(579	)	$	12,503
	Current period other comprehensive income		1,482			1,250			2,732
	Balances, June 30, 2014	$	14,564		$	671		$	15,235

StockBased_Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Stock-Based Compensation	'
	NOTE 8 — STOCK-BASED COMPENSATION
	2005 Omnibus Incentive Plan. As of June 30, 2014, the Company had an aggregate of 16 million shares of common stock available for grant as share-based awards under the Company’s omnibus incentive plan (“Omnibus Plan”). At the Annual Meeting on June 5, 2014, the Company’s stockholders approved an amendment to the Omnibus Plan to increase the number of shares of common stock available for grant by 10 million shares. As of June 30, 2014, the approved shares were pending registration with the Securities and Exchange Commission, and thus were not included in the shares of common stock available for grant. A summary of activity under the Company’s share-based payment plans for the six months ended June 30, 2014 is presented below:
	Stock options and stock appreciation rights (“SARs”)
		Units			Weighted
		(000’s)			Average
					Exercise
					Price
	Outstanding at January 1, 2014		16,074		$	15.22
	Granted		65			25.62
	Exercised		(1,040	)		14.91
	Forfeited or expired		(341	)		54.82
	Outstanding at June 30, 2014		14,758			14.37
	Exercisable at June 30, 2014		9,295			15.01
	Restricted stock units (“RSUs”) and performance share units (“PSUs”)
		RSUs						PSUs
		Units			Weighted			Units			Weighted			Weighted
		(000’s)			Average			(000’s)			Average			Average
					Grant-Date						Grant-Date			Target
					Fair Value						Fair Value			Price
	Nonvested at January 1, 2014		1,339		$	13.85			1,055		$	13.91		$	16.95
	Granted		50			25.37			—			—			—
	Vested		(95	)		13.99			—			—			—
	Forfeited		(14	)		13.14			—			—			—
	Nonvested at June 30, 2014		1,280			14.3			1,055			13.91			16.95
	The vested RSUs amount in the table above includes approximately 53,000 vested shares deferred by members of the Company’s Board of Directors that will not release until such members’ termination from the Board of Directors. In 2013, the Company began granting 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 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 of 2014, the Company granted 265,122 PSUs pursuant to the Bonus PSU Policy with a target price of $31.72. Such awards are excluded from the table above.
	MGM China Share Option Plan. As of June 30, 2014, MGM China had an aggregate of 341 million shares of stock available for grant as share-based awards under the MGM China share option plan (“MGM China Plan”). A summary of activity under the MGM China Plan for the six months ended June 30, 2014 is presented below:
	Stock options
		Units			Weighted
		(000’s)			Average
					Exercise
					Price
	Outstanding at January 1, 2014		16,916		$	2.06
	Granted		18,080			3.49
	Exercised		(258	)		1.91
	Forfeited or expired		(263	)		2.28
	Outstanding at June 30, 2014		34,475			2.81
	Exercisable at June 30, 2014		10,267			2
	Recognition of compensation cost. Compensation cost for both the Omnibus Plan and MGM China Plan was recognized as follows:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(In thousands)
	Compensation cost:
	Omnibus Plan	$	6,695		$	6,508		$	13,697		$	13,768
	MGM China Plan		1,976			1,686			3,437			3,366
	Total compensation cost		8,671			8,194			17,134			17,134
	Less: Reimbursed costs and other		(266	)		(262	)		(534	)		(579	)
	Compensation cost recognized as expense		8,405			7,932			16,600			16,555
	Less: Related tax benefit		(2,209	)		—			(4,526	)		—
	Compensation expense, net of tax benefit	$	6,196		$	7,932		$	12,074		$	16,555
	In June 2014, MGM China granted 17 million stock options pursuant to the MGM China Plan. 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. The following weighted average-assumptions were used to determine fair value of awards granted during the second quarter of 2014: expected volatility of 39%, an expected term of 7.8 years, an expected dividend yield of 1.6% and a risk-free interest rate of 1.8%, which resulted in a $1.04 weighted-average per share fair value. Expected volatility is based on historical volatility of MGM China’s stock price. The expected term considers the contractual term of the option as well as historical exercise behavior of previously granted options. The dividend yield is estimated with reference to the dividend policy of MGM China. 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.

Property_Transactions_Net

Property Transactions, Net	6 Months Ended
	Jun. 30, 2014
Text Block [Abstract]	'
Property Transactions, Net	'
	NOTE 9 — PROPERTY TRANSACTIONS, NET
	Property transactions, net includes:
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
		(In thousands)
	Grand Victoria investment impairment charge	$	28,789	$	36,607	$	28,789	$	36,607
	Corporate buildings impairment charge		—		44,510		—		44,510
	Other property transactions, net		4,381		7,014		4,939		15,505
		$	33,170	$	88,131	$	33,728	$	96,622
	See Note 3 for discussion of the Grand Victoria investment impairment charges in 2014 and 2013. 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 new Las Vegas arena project, of which the Company will own 50%, that will be located on the land underlying these buildings. Other property transactions, net for the three and six months ended June 30, 2014 and 2013 includes miscellaneous asset disposals and demolition costs.

Segment_Information

Segment Information	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	NOTE 10 — 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 and certain other corporate operations and management services 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 non-GAAP measure defined as Adjusted EBITDA before corporate expense and stock compensation expense related to the MGM Resorts stock option plan, which are not allocated to the reportable segments. MGM China recognizes stock compensation expense related to its stock compensation plan which is included in the calculation of Adjusted EBITDA for MGM China. Adjusted EBITDA is a non-GAAP measure defined as earnings before interest and other non-operating income (expense), taxes, depreciation and amortization, preopening and start-up expenses and property transactions, net.
	The following tables present the Company’s segment information:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(In thousands)
	Net Revenues:
	Wholly owned domestic resorts	$	1,639,270		$	1,535,996		$	3,209,504		$	3,025,184
	MGM China		827,928			835,149			1,769,376			1,582,706
	Reportable segment net revenues		2,467,198			2,371,145			4,978,880			4,607,890
	Corporate and other		113,835			110,120			232,551			225,523
		$	2,581,033		$	2,481,265		$	5,211,431		$	4,833,413
	Adjusted EBITDA:
	Wholly owned domestic resorts	$	414,398		$	375,603		$	817,244		$	736,640
	MGM China		210,488			204,815			451,213			385,270
	Reportable segment Adjusted Property EBITDA		624,886			580,418			1,268,457			1,121,910
	Corporate and other		(38,900	)		(39,028	)		(55,989	)		(56,148	)
			585,986			541,390			1,212,468			1,065,762
	Other operating expense:
	Preopening and start-up expenses		(9,759	)		(3,506	)		(15,395	)		(5,652	)
	Property transactions, net		(33,170	)		(88,131	)		(33,728	)		(96,622	)
	Depreciation and amortization		(203,070	)		(218,151	)		(410,725	)		(430,069	)
	Operating income		339,987			231,602			752,620			533,419
	Non-operating income (expense):
	Interest expense, net of amounts capitalized		(203,936	)		(214,500	)		(413,323	)		(439,947	)
	Non-operating items from unconsolidated affiliates		(14,578	)		(38,864	)		(28,301	)		(60,943	)
	Other, net		(309	)		(4,951	)		(1,743	)		(6,233	)
			(218,823	)		(258,315	)		(443,367	)		(507,123	)
	Income (loss) before income taxes		121,164			(26,713	)		309,253			26,296
	Benefit (provision) for income taxes		52,540			(3,865	)		56,059			(34,296	)
	Net income (loss)		173,704			(30,578	)		365,312			(8,000	)
	Less: Net income attributable to noncontrolling interests		(68,160	)		(62,380	)		(151,608	)		(78,412	)
	Net income (loss) attributable to MGM Resorts International	$	105,544		$	(92,958	)	$	213,704		$	(86,412	)

Related_Party_Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2014
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	NOTE 11 — RELATED PARTY TRANSACTIONS
	MGM China. 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 in 2014 with a 20% increase per annum during the agreement term. During the three and six months ended June 30, 2014, MGM China incurred total license fees of $14 million and $31 million, respectively. During the three and six months ended June 30, 2013, MGM China incurred total license fees of $15 million and $28 million, respectively. 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 for MGM Cotai is subject to a cap of $24 million in 2014, which will increase by 10% per annum for each year during the term of the agreement. During the six months ended June 30, 2013, MGM China incurred $15 million of fees to MGM Branding and Development related to development services. Such amounts have been eliminated in consolidation. No fee was incurred during the six months ended June 30, 2014.
	An entity owned by Ms. Pansy Ho received distributions of $5 million and $8 million during the three and six months ended June 30, 2014, respectively, in connection with the ownership of a noncontrolling interest in MGM Branding and Development. The entity received distributions of $4 million and $14 million in the three and six months ended June 30, 2013, respectively.

Condensed_Consolidating_Financ

Condensed Consolidating Financial Information	6 Months Ended
	Jun. 30, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'
Condensed Consolidating Financial Information	'
	NOTE 12 — CONDENSED CONSOLIDATING FINANCIAL INFORMATION
	The Company’s domestic subsidiaries, excluding certain minor subsidiaries, its domestic insurance subsidiaries and MGM Grand Detroit, LLC, 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 June 30, 2014 and December 31, 2013, and for the three and six months ended June 30, 2014 and 2013, as presented below. Within the Condensed Consolidating Statements of Cash Flows for the period ending June 30, 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
		At June 30, 2014
		Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
					Subsidiaries			Subsidiaries
		(In thousands)
	Current assets	$	357,775		$	891,917		$	917,115		$	(492	)	$	2,166,315
	Property and equipment, net		—			12,467,651			1,658,043			(11,972	)		14,113,722
	Investments in subsidiaries		20,193,503			3,843,505			—			(24,037,008	)		—
	Investments in and advances to unconsolidated affiliates		—			1,388,087			7,837			25,000			1,420,924
	Intercompany accounts		—			1,932,342			—			(1,932,342	)		—
	Other non-current assets		158,090			545,733			7,167,519			—			7,871,342
		$	20,709,368		$	21,069,235		$	9,750,514		$	(25,956,814	)	$	25,572,303
	Current liabilities	$	685,324		$	961,631		$	913,853		$	(492	)	$	2,560,316
	Intercompany accounts		1,882,373			—			49,969			(1,932,342	)		—
	Deferred income taxes		2,047,103			—			309,895			—			2,356,998
	Long-term debt		11,599,978			4,836			1,001,706			—			12,606,520
	Other long-term obligations		37,287			52,511			17,143			—			106,941
	Total liabilities		16,252,065			1,018,978			2,292,566			(1,932,834	)		17,630,775
	MGM Resorts stockholders’ equity		4,457,303			20,050,257			3,973,723			(24,023,980	)		4,457,303
	Noncontrolling interests		—			—			3,484,225			—			3,484,225
	Total stockholders’ equity		4,457,303			20,050,257			7,457,948			(24,023,980	)		7,941,528
		$	20,709,368		$	21,069,235		$	9,750,514		$	(25,956,814	)	$	25,572,303
		At December 31, 2013
		Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
					Subsidiaries			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		20,017,270			4,037,168			—			(24,054,438	)		—
	Investments in and advances to unconsolidated affiliates		—			1,367,071			7,765			—			1,374,836
	Other non-current assets		167,552			542,259			7,250,887			—			7,960,698
		$	20,679,118		$	19,402,863		$	10,095,178		$	(24,066,974	)	$	26,110,185
	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		2,120,676			—			309,738			—			2,430,414
	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		16,447,939			(464,593	)		2,276,780			(25,564	)		18,234,562
	MGM Resorts stockholders’ equity		4,231,179			19,867,456			4,173,954			(24,041,410	)		4,231,179
	Noncontrolling interests		—			—			3,644,444			—			3,644,444
	Total stockholders’ equity		4,231,179			19,867,456			7,818,398			(24,041,410	)		7,875,623
		$	20,679,118		$	19,402,863		$	10,095,178		$	(24,066,974	)	$	26,110,185
	CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION
		Three Months Ended June 30, 2014
		Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
					Subsidiaries			Subsidiaries
		(In thousands)
	Net revenues	$	—		$	1,617,302		$	964,352		$	(621	)	$	2,581,033
	Equity in subsidiaries’ earnings		249,078			85,446			—			(334,524	)		—
	Expenses:
	Casino and hotel operations		1,299			971,928			646,386			(621	)		1,618,992
	General and administrative		1,134			272,340			54,010			—			327,484
	Corporate expense		16,724			36,198			1,517			—			54,439
	Preopening and start-up expenses		—			1,015			8,744			—			9,759
	Property transactions, net		—			33,044			126			—			33,170
	Depreciation and amortization		—			123,853			79,217			—			203,070
			19,157			1,438,378			790,000			(621	)		2,246,914
	Income from unconsolidated affiliates		—			5,730			138			—			5,868
	Operating income (loss)		229,921			270,100			174,490			(334,524	)		339,987
	Interest expense, net of amounts capitalized		(196,215	)		(120	)		(7,601	)		—			(203,936	)
	Other, net		16,358			(14,089	)		(17,156	)		—			(14,887	)
Income (loss) before income taxes		50,064			255,891			149,733			(334,524	)		121,164
Benefit (provision) for income taxes		55,480			(2,108	)		(832	)		—			52,540
Net income (loss)		105,544			253,783			148,901			(334,524	)		173,704
Less: Net income attributable to noncontrolling interests		—			—			(68,160	)		—			(68,160	)
Net income (loss) attributable to MGM Resorts International	$	105,544		$	253,783		$	80,741		$	(334,524	)	$	105,544
Net income (loss)	$	105,544		$	253,783		$	148,901		$	(334,524	)	$	173,704
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		2,999			2,999			5,862			(5,998	)		5,862
Other comprehensive income (loss)		2,999			2,999			5,862			(5,998	)		5,862
Comprehensive income (loss)		108,543			256,782			154,763			(340,522	)		179,566
Less: Comprehensive income attributable to noncontrolling interests		—			—			(71,023	)		—			(71,023	)
Comprehensive income (loss) attributable to MGM Resorts International	$	108,543		$	256,782		$	83,740		$	(340,522	)	$	108,543
	Six Months Ended June 30, 2014
	Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
				Subsidiaries			Subsidiaries
	(In thousands)
Net revenues	$	—		$	3,173,631		$	2,039,014		$	(1,214	)	$	5,211,431
Equity in subsidiaries’ earnings		556,049			178,815			—			(734,864	)		—
Expenses:
Casino and hotel operations		2,553			1,893,902			1,373,846			(1,214	)		3,269,087
General and administrative		2,246			532,980			111,504			—			646,730
Corporate expense		33,463			69,784			4,543			—			107,790
Preopening and start-up expenses		—			3,006			12,389			—			15,395
Property transactions, net		—			33,538			190			—			33,728
Depreciation and amortization		—			251,928			158,797			—			410,725
		38,262			2,785,138			1,661,269			(1,214	)		4,483,455
Income from unconsolidated affiliates		—			24,453			191			—			24,644
Operating income (loss)		517,787			591,761			377,936			(734,864	)		752,620
Interest expense, net of amounts capitalized		(397,112	)		(224	)		(15,987	)		—			(413,323	)
Other, net		34,948			(28,452	)		(36,540	)		—			(30,044	)
Income (loss) before income taxes		155,623			563,085			325,409			(734,864	)		309,253
Benefit (provision) for income taxes		58,081			(467	)		(1,555	)		—			56,059
Net income (loss)		213,704			562,618			323,854			(734,864	)		365,312
Less: Net income attributable to noncontrolling interests		—			—			(151,608	)		—			(151,608	)
Net income (loss) attributable to MGM Resorts International	$	213,704		$	562,618		$	172,246		$	(734,864	)	$	213,704
Net income (loss)	$	213,704		$	562,618		$	323,854		$	(734,864	)	$	365,312
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		1,482			1,482			3,102			(2,964	)		3,102
Other		1,250			1,250			—			(1,250	)		1,250
Other comprehensive income (loss)		2,732			2,732			3,102			(4,214	)		4,352
Comprehensive income (loss)		216,436			565,350			326,956			(739,078	)		369,664
Less: Comprehensive income attributable to noncontrolling interests		—			—			(153,228	)		—			(153,228	)
Comprehensive income (loss) attributable to MGM Resorts International	$	216,436		$	565,350		$	173,728		$	(739,078	)	$	216,436
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION
	Six Months Ended June 30, 2014
	Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
				Subsidiaries			Subsidiaries
	(In thousands)
Cash flows from operating activities
Net cash provided by (used in) operating activities	$	(366,066	)	$	664,206		$	480,484		$	25,000		$	803,624
Cash flows from investing activities
Capital expenditures, net of construction payable		—			(166,418	)		(203,830	)		—			(370,248	)
Dispositions of property and equipment		—			104			308			—			412
Investments in and advances to unconsolidated affiliates		(11,700	)		(17,050	)		—			(25,000	)		(53,750	)
Distributions from unconsolidated affiliates in excess of earnings		—			790			—			—			790
Investments in treasury securities - maturities longer than 90 days		—			(93,137	)		—			—			(93,137	)
Proceeds from treasury securities - maturities longer than 90 days		—			111,238			—			—			111,238
Intercompany transactions		—			(462,037	)		—			462,037			—
Other		—			2,535			—			—			2,535
Net cash provided by (used in) investing activities		(11,700	)		(623,975	)		(203,522	)		437,037			(402,160	)
Cash flows from financing activities
Net repayments under bank credit facilities - maturities of 90 days or less		(1,287,750	)		—			(450,000	)		—			(1,737,750	)
Borrowings under bank credit facilities - maturities longer than 90 days		3,001,875			—			450,000			—			3,451,875
Repayments under bank credit facilities - maturities longer than 90 days		(1,728,125	)		—			—			—			(1,728,125	)
Retirement of senior notes		(508,900	)		—			—			—			(508,900	)
Intercompany accounts		849,275			(38,418	)		(348,820	)		(462,037	)		—
Distributions to noncontrolling interest owners		—			—			(314,447	)		—			(314,447	)
Other		(1,696	)		—			(477	)		—			(2,173	)
Net cash provided by (used in) financing activities		324,679			(38,418	)		(663,744	)		(462,037	)		(839,520	)
Effect of exchange rate on cash		—			—			(476	)		—			(476	)
Cash and cash equivalents
Net increase (decrease) for the period		(53,087	)		1,813			(387,258	)		—			(438,532	)
Balance, beginning of period		378,660			237,457			1,187,552			—			1,803,669
Balance, end of period	$	325,573		$	239,270		$	800,294		$	—		$	1,365,137
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION
	Three Months Ended June 30, 2013
	Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
				Subsidiaries			Subsidiaries
	(In thousands)
Net revenues	$	—		$	1,513,692		$	968,039		$	(466	)	$	2,481,265
Equity in subsidiaries’ earnings		120,773			78,596			—			(199,369	)		—
Expenses:
Casino and hotel operations		1,366			920,319			658,650			(466	)		1,579,869
General and administrative		1,037			260,928			52,359			—			314,324
Corporate expense		14,646			30,375			7,343			—			52,364
Preopening and start-up expenses		—			1,248			2,258			—			3,506
Property transactions, net		—			87,980			151			—			88,131
Depreciation and amortization		—			135,887			82,264			—			218,151
		17,049			1,436,737			803,025			(466	)		2,256,345
Income from unconsolidated affiliates		—			5,620			1,062			—			6,682
Operating income (loss)		103,724			161,171			166,076			(199,369	)		231,602
Interest expense, net of amounts capitalized		(199,982	)		(2,714	)		(11,804	)		—			(214,500	)
Other, net		12,595			(39,034	)		(17,376	)		—			(43,815	)
Income (loss) before income taxes		(83,663	)		119,423			136,896			(199,369	)		(26,713	)
Benefit (provision) for income taxes		(9,295	)		5,955			(525	)		—			(3,865	)
Net income (loss)		(92,958	)		125,378			136,371			(199,369	)		(30,578	)
Less: Net income attributable to noncontrolling interests		—			—			(62,380	)		—			(62,380	)
Net income (loss) attributable to MGM Resorts International	$	(92,958	)	$	125,378		$	73,991		$	(199,369	)	$	(92,958	)
Net income (loss)	$	(92,958	)	$	125,378		$	136,371		$	(199,369	)	$	(30,578	)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		3,326			3,326			6,416			(6,652	)		6,416
Other comprehensive income (loss)		3,326			3,326			6,416			(6,652	)		6,416
Comprehensive income (loss)		(89,632	)		128,704			142,787			(206,021	)		(24,162	)
Less: Comprehensive income attributable to noncontrolling interests		—			—			(65,470	)		—			(65,470	)
Comprehensive income (loss) attributable to MGM Resorts International	$	(89,632	)	$	128,704		$	77,317		$	(206,021	)	$	(89,632	)
	Six Months Ended June 30, 2013
	Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
				Subsidiaries			Subsidiaries
	(In thousands)
Net revenues	$	—		$	2,977,657		$	1,856,701		$	(945	)	$	4,833,413
Equity in subsidiaries’ earnings		304,196			108,582			—			(412,778	)		—
Expenses:
Casino and hotel operations		2,876			1,806,402			1,265,131			(945	)		3,073,464
General and administrative		2,127			512,477			103,621			—			618,225
Corporate expense		29,454			58,114			11,420			—			98,988
Preopening and start-up expenses		—			1,020			4,632			—			5,652
Property transactions, net		—			96,275			347			—			96,622
Depreciation and amortization		—			263,718			166,351			—			430,069
		34,457			2,738,006			1,551,502			(945	)		4,323,020
Income from unconsolidated affiliates		—			21,958			1,068			—			23,026
Operating income (loss)		269,739			370,191			306,267			(412,778	)		533,419
Interest expense, net of amounts capitalized		(408,665	)		(5,699	)		(25,583	)		—			(439,947	)
Other, net		27,761			(61,852	)		(33,085	)		—			(67,176	)
Income (loss) before income taxes		(111,165	)		302,640			247,599			(412,778	)		26,296
Benefit (provision) for income taxes		24,753			7,412			(66,461	)		—			(34,296	)
Net income (loss)		(86,412	)		310,052			181,138			(412,778	)		(8,000	)
Less: Net income attributable to noncontrolling interests		—			—			(78,412	)		—			(78,412	)
Net income (loss) attributable to MGM Resorts International	$	(86,412	)	$	310,052		$	102,726		$	(412,778	)	$	(86,412	)
Net income (loss)	$	(86,412	)	$	310,052		$	181,138		$	(412,778	)	$	(8,000	)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		(3,110	)		(3,110	)		(6,225	)		6,220			(6,225	)
Other		115			115			—			(115	)		115
Other comprehensive income (loss)		(2,995	)		(2,995	)		(6,225	)		6,105			(6,110	)
Comprehensive income (loss)		(89,407	)		307,057			174,913			(406,673	)		(14,110	)
Less: Comprehensive income attributable to noncontrolling interests		—			—			(75,297	)		—			(75,297	)
Comprehensive income (loss) attributable to MGM Resorts International	$	(89,407	)	$	307,057		$	99,616		$	(406,673	)	$	(89,407	)
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION
	Six Months Ended June 30, 2013
	Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
				Subsidiaries			Subsidiaries
	(In thousands)
Cash flows from operating activities
Net cash provided by (used in) operating activities	$	(402,258	)	$	565,476		$	566,844		$	—		$	730,062
Cash flows from investing activities
Capital expenditures, net of construction payable		—			(108,574	)		(134,304	)		—			(242,878	)
Dispositions of property and equipment		—			127			196			—			323
Investments in and advances to unconsolidated affiliates		(12,400	)		(2,000	)		—			—			(14,400	)
Investments in treasury securities - maturities longer than 90 days		—			(120,332	)		—			—			(120,332	)
Proceeds from treasury securities - maturities longer than 90 days		—			135,268			—			—			135,268
Other		—			1,806			—			—			1,806
Net cash used in investing activities		(12,400	)		(93,705	)		(134,108	)		—			(240,213	)
Cash flows from financing activities
Net repayments under bank credit facilities - maturities of 90 days or less		(14,000	)		—			—			—			(14,000	)
Borrowings under bank credit facilities - maturities longer than 90 days		2,343,000			—			450,000			—			2,793,000
Repayments under bank credit facilities - maturities longer than 90 days		(2,343,000	)		—			(450,000	)		—			(2,793,000	)
Retirement of senior notes		(462,226	)		(8	)		—			—			(462,234	)
Debt issuance costs		(17,061	)		—			—			—			(17,061	)
Intercompany accounts		756,926			(488,344	)		(268,582	)		—			—
Distributions to noncontrolling interest owners		—			—			(259,016	)		—			(259,016	)
Other		(1,346	)		—			(341	)		—			(1,687	)
Net cash provided by (used in) financing activities		262,293			(488,352	)		(527,939	)		—			(753,998	)
Effect of exchange rate on cash		—			—			(687	)		—			(687	)
Cash and cash equivalents
Net decrease for the period		(152,365	)		(16,581	)		(95,890	)		—			(264,836	)
Balance, beginning of period		254,385			226,242			1,062,882			—			1,543,509
Balance, end of period	$	102,020		$	209,661		$	966,992		$	—		$	1,278,673

Basis_of_Presentation_and_Sign1

Basis of Presentation and Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basis of presentation	'
	Basis of presentation. As permitted by the rules and regulations of the Securities and Exchange Commission, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted. These consolidated financial statements should be read in conjunction with the Company’s 2013 annual consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.
	In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments, which include only normal recurring adjustments, necessary to present fairly the Company’s interim financial statements. The results for such periods are not necessarily indicative of the results to be expected for the full year.
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 2 inputs to measure the fair value of the Company’s treasury securities held by the Borgata trust. See Note 1;
		•	The Company uses Level 1 inputs for its long-term debt fair value disclosures. See Note 4; and
		•	The Company used Level 3 inputs when assessing the fair value of its investment in Grand Victoria at June 30, 2014 and 2013. See Note 3.
Income tax provision	'
	Income tax provision. For interim income tax reporting the Company estimates its annual effective tax rate and applies it to its year-to-date ordinary income. The tax effects of unusual or infrequently occurring items, including changes in judgment about valuation allowances and effects of changes in tax laws or rates are reported in the interim period in which they occur. The Company’s effective income tax rate was (43.4%) and (18.1%) for the three months and six months ended June 30, 2014, respectively.
	The Company recognizes deferred tax assets, net of applicable reserves, related to tax loss and credit carryforwards and other temporary differences with a future tax benefit to the extent that realization of such benefit is more likely than not. Otherwise, a valuation allowance is applied. Because of the Company’s history of recent losses in the United States, the Company does not rely on future United States sourced operating income in assessing the realization of its deferred tax assets.
	Because MGM China 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 the Company’s current five-year exemption from the Macau 12% complementary tax on gaming profits ends on December 31, 2016, the Company believes it will be entitled to receive a third five-year exemption from Macau based upon exemptions granted to the Company’s competitors in order to ensure non-discriminatory treatment among gaming concessionaires and subconcessionaires. For all periods beyond December 31, 2021, the Company has assumed that it 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 has factored that assumption into both the measurement of its foreign deferred tax assets and liabilities as well as its future projections of foreign sourced income. As a result, the Company projects that it will be able to realize a benefit, and hence, projects that it will record a deferred tax asset for foreign tax credits, net of valuation allowance (“net deferred foreign tax credit asset”), of approximately $335 million as of December 31, 2014 and has reflected this assumption in its annual effective tax rate for 2014. Should the Company in a future period actually receive or be able to assume under the law a fourth five-year exemption, an additional valuation allowance would likely need to be provided on some portion or all of the net deferred foreign tax credit asset, resulting in an increase in the provision for income taxes in such period.
	During the quarter ended June 30, 2014 the Company received final approval from the Joint Committee on Taxation of the results of IRS examinations covering its 2005 through 2009 tax years. These examinations are now considered settled for financial reporting purposes. Consequently, the Company reduced unrecognized tax benefits by $81 million and recorded income tax benefit of $31 million to reflect the effects of this settlement. The Company previously made a deposit of $30 million with the IRS to cover the expected cash taxes and interest resulting from the tentatively agreed adjustments for these examinations and does not expect to make any further cash payments as a result of this final settlement. Since the tax and interest had not been assessed by the end of the second quarter, the deposit is included in “Prepaid expenses and other” while the expected amount of the assessment is included in “Income taxes payable” on the balance sheet at June 30, 2014.
Recently issued accounting standards	'
	Recently issued accounting standards. During the six months ended June 30, 2014, the Company implemented Financial Accounting Standards Board (“FASB”) Accounting Standards Update No. 2013-11 (“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 in the six months ended June 30, 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 of adopting this new accounting guidance will have on its consolidated financial statements and footnote disclosures.
Segments 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 and certain other corporate operations and management services 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 non-GAAP measure defined as Adjusted EBITDA before corporate expense and stock compensation expense related to the MGM Resorts stock option plan, which are not allocated to the reportable segments. MGM China recognizes stock compensation expense related to its stock compensation plan which is included in the calculation of Adjusted EBITDA for MGM China. Adjusted EBITDA is a non-GAAP measure defined as earnings before interest and other non-operating income (expense), taxes, depreciation and amortization, preopening and start-up expenses and property transactions, net.

Investments_in_and_Advances_to1

Investments in and Advances to Unconsolidated Affiliates (Tables)	6 Months Ended
	Jun. 30, 2014
Schedule of Investments in and Advances to Unconsolidated Affiliates and Results of Operations of Unconsolidated Affiliates	'
	Investments in and advances to unconsolidated affiliates consisted of the following:
		June 30,			December 31,
		2014			2013
		(In thousands)
	CityCenter Holdings, LLC – CityCenter (50%)	$	1,226,940		$	1,172,087
	Elgin Riverboat Resort–Riverboat Casino – Grand Victoria (50%)		140,000			169,579
	Other		53,984			33,170
		$	1,420,924		$	1,374,836
	The Company recorded its share of the results of operations of unconsolidated affiliates as follows:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(In thousands)
	Income from unconsolidated affiliates	$	5,868		$	6,682		$	24,644		$	23,026
	Preopening and start-up expenses		(101	)		—			(120	)		(376	)
	Non-operating items from unconsolidated affiliates		(14,578	)		(38,864	)		(28,301	)		(60,943	)
		$	(8,811	)	$	(32,182	)	$	(3,777	)	$	(38,293	)
CityCenter Holdings, LLC [Member]	'
Summarized Balance Sheet and Income Statement Information	'
	Summarized balance sheet information for CityCenter is as follows:
		June 30,			December 31,
		2014			2013
		(In thousands)
	Current assets	$	494,634		$	451,058
	Property and other assets, net		8,070,612			8,261,240
	Current liabilities		511,485			462,487
	Long-term debt and other long-term obligations		1,552,353			1,688,113
	Equity		6,501,408			6,561,698
	Summarized income statement information for CityCenter is as follows:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(In thousands)
	Net revenues	$	319,875		$	333,174		$	656,292		$	648,316
	Operating expenses		(344,710	)		(356,948	)		(676,164	)		(672,258	)
	Operating loss		(24,835	)		(23,774	)		(19,872	)		(23,942	)
	Non-operating expenses		(26,953	)		(101,992	)		(52,118	)		(169,667	)
	Net loss	$	(51,788	)	$	(125,766	)	$	(71,990	)	$	(193,609	)

LongTerm_Debt_Tables

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Long-Term Debt	'
	Long-term debt consisted of the following:
		June 30,			December 31,
		2014			2013
		(In thousands)
	Senior credit facility:
	$2,758 million ($2,772 million at December 31, 2013) term loans, net	$	2,751,575		$	2,765,041
	MGM Grand Paradise credit facility		553,520			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		1,453,795			1,456,153
	$875 million 6.625% senior notes, due 2015, net		875,701			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		497,459			496,987
	$743 million 7.625% senior notes, due 2017		743,000			743,000
	$475 million 11.375% senior notes, due 2018, net		468,178			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
	$0.6 million 7% debentures, due 2036, net		572			572
	$4.3 million 6.7% debentures, due 2096		4,265			4,265
			12,923,714			13,447,230
	Less: Current portion		(317,194	)		—
		$	12,606,520		$	13,447,230

Income_Loss_Per_Share_of_Commo1

Income (Loss) Per Share of Common Stock (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of Weighted-Average Number of Common and Common Equivalent Shares Used in the Calculation of Basic and Diluted Income (Loss) Per Share	'
	The weighted-average number of common and common equivalent shares used in the calculation of basic and diluted income (loss) per share consisted of the following:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(In thousands)
	Numerator:
	Net income (loss) attributable to MGM Resorts International—basic	$	105,544		$	(92,958	)	$	213,704		$	(86,412	)
	Interest on convertible debt, net of tax		2,103			—			4,298			—
	Potentially dilutive effect due to MGM China share option plan		(84	)		—			(213	)		—
	Net income (loss) attributable to MGM Resorts International—diluted	$	107,563		$	(92,958	)	$	217,789		$	(86,412	)
	Denominator:
	Weighted-average common shares outstanding—basic		490,786			489,484			490,692			489,388
	Potential dilution from share-based awards		6,436			—			6,446			—
	Potential dilution from assumed conversion of convertible debt		16,149			—			16,149			—
	Weighted-average common and common equivalent shares—diluted		513,371			489,484			513,287			489,388
	Antidilutive share-based awards excluded from the calculation of diluted earnings per share		2,534			18,498			2,580			18,498

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Changes in Stockholders' Equity	'
	The following table presents the Company’s changes in stockholders’ equity for the six months ended June 30, 2014:
		MGM Resorts			Noncontrolling			Total
		International			Interests			Stockholders’
		Stockholders’						Equity
		Equity
		(In thousands)
	Balances, January 1, 2014	$	4,231,179		$	3,644,444		$	7,875,623
	Net income		213,704			151,608			365,312
	Foreign currency translation adjustment		1,482			1,620			3,102
	Other comprehensive income from unconsolidated affiliate, net		1,250			—			1,250
	Stock-based compensation		15,450			1,684			17,134
	Change in excess tax benefit from stock-based compensation		(9,263	)		—			(9,263	)
	Issuance of MGM Resorts common stock pursuant to stock-based compensation awards		(3,751	)		—			(3,751	)
	Cash distributions to noncontrolling interest owners		—			(314,865	)		(314,865	)
	Issuance of performance share units		7,529			—			7,529
	Other		(277	)		(266	)		(543	)
	Balances, June 30, 2014	$	4,457,303		$	3,484,225		$	7,941,528
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component	'
	Changes in accumulated other comprehensive income (loss) by component are as follows:
		Foreign			Other			Total
		Currency			Adjustments
		Translation
		Adjustment
		(In thousands)
	Balances, January 1, 2014	$	13,082		$	(579	)	$	12,503
	Current period other comprehensive income		1,482			1,250			2,732
	Balances, June 30, 2014	$	14,564		$	671		$	15,235

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 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:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(In thousands)
	Compensation cost:
	Omnibus Plan	$	6,695		$	6,508		$	13,697		$	13,768
	MGM China Plan		1,976			1,686			3,437			3,366
	Total compensation cost		8,671			8,194			17,134			17,134
	Less: Reimbursed costs and other		(266	)		(262	)		(534	)		(579	)
	Compensation cost recognized as expense		8,405			7,932			16,600			16,555
	Less: Related tax benefit		(2,209	)		—			(4,526	)		—
	Compensation expense, net of tax benefit	$	6,196		$	7,932		$	12,074		$	16,555
Omnibus Plan [Member]	'
Summary of Stock Options and Stock Appreciation Rights Activity	'
	Stock options and stock appreciation rights (“SARs”)
		Units			Weighted
		(000’s)			Average
					Exercise
					Price
	Outstanding at January 1, 2014		16,074		$	15.22
	Granted		65			25.62
	Exercised		(1,040	)		14.91
	Forfeited or expired		(341	)		54.82
	Outstanding at June 30, 2014		14,758			14.37
	Exercisable at June 30, 2014		9,295			15.01
Schedule of Restricted Stock Units and Performance Share Units Activity	'
	Restricted stock units (“RSUs”) and performance share units (“PSUs”)
		RSUs						PSUs
		Units			Weighted			Units			Weighted			Weighted
		(000’s)			Average			(000’s)			Average			Average
					Grant-Date						Grant-Date			Target
					Fair Value						Fair Value			Price
	Nonvested at January 1, 2014		1,339		$	13.85			1,055		$	13.91		$	16.95
	Granted		50			25.37			—			—			—
	Vested		(95	)		13.99			—			—			—
	Forfeited		(14	)		13.14			—			—			—
	Nonvested at June 30, 2014		1,280			14.3			1,055			13.91			16.95
MGM China Share Option Plan [Member]	'
Summary of Stock Options Activity	'
	A summary of activity under the MGM China Plan for the six months ended June 30, 2014 is presented below:
	Stock options
		Units			Weighted
		(000’s)			Average
					Exercise
					Price
	Outstanding at January 1, 2014		16,916		$	2.06
	Granted		18,080			3.49
	Exercised		(258	)		1.91
	Forfeited or expired		(263	)		2.28
	Outstanding at June 30, 2014		34,475			2.81
	Exercisable at June 30, 2014		10,267			2

Property_Transactions_Net_Tabl

Property Transactions, Net (Tables)	6 Months Ended
	Jun. 30, 2014
Text Block [Abstract]	'
Schedule of Property Transactions, Net	'
	Property transactions, net includes:
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
		(In thousands)
	Grand Victoria investment impairment charge	$	28,789	$	36,607	$	28,789	$	36,607
	Corporate buildings impairment charge		—		44,510		—		44,510
	Other property transactions, net		4,381		7,014		4,939		15,505
		$	33,170	$	88,131	$	33,728	$	96,622

Segment_Information_Tables

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Schedule of Segment Information	'
	The following tables present the Company’s segment information:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(In thousands)
	Net Revenues:
	Wholly owned domestic resorts	$	1,639,270		$	1,535,996		$	3,209,504		$	3,025,184
	MGM China		827,928			835,149			1,769,376			1,582,706
	Reportable segment net revenues		2,467,198			2,371,145			4,978,880			4,607,890
	Corporate and other		113,835			110,120			232,551			225,523
		$	2,581,033		$	2,481,265		$	5,211,431		$	4,833,413
	Adjusted EBITDA:
	Wholly owned domestic resorts	$	414,398		$	375,603		$	817,244		$	736,640
	MGM China		210,488			204,815			451,213			385,270
	Reportable segment Adjusted Property EBITDA		624,886			580,418			1,268,457			1,121,910
	Corporate and other		(38,900	)		(39,028	)		(55,989	)		(56,148	)
			585,986			541,390			1,212,468			1,065,762
	Other operating expense:
	Preopening and start-up expenses		(9,759	)		(3,506	)		(15,395	)		(5,652	)
	Property transactions, net		(33,170	)		(88,131	)		(33,728	)		(96,622	)
	Depreciation and amortization		(203,070	)		(218,151	)		(410,725	)		(430,069	)
	Operating income		339,987			231,602			752,620			533,419
	Non-operating income (expense):
	Interest expense, net of amounts capitalized		(203,936	)		(214,500	)		(413,323	)		(439,947	)
	Non-operating items from unconsolidated affiliates		(14,578	)		(38,864	)		(28,301	)		(60,943	)
	Other, net		(309	)		(4,951	)		(1,743	)		(6,233	)
			(218,823	)		(258,315	)		(443,367	)		(507,123	)
	Income (loss) before income taxes		121,164			(26,713	)		309,253			26,296
	Benefit (provision) for income taxes		52,540			(3,865	)		56,059			(34,296	)
	Net income (loss)		173,704			(30,578	)		365,312			(8,000	)
	Less: Net income attributable to noncontrolling interests		(68,160	)		(62,380	)		(151,608	)		(78,412	)
	Net income (loss) attributable to MGM Resorts International	$	105,544		$	(92,958	)	$	213,704		$	(86,412	)

Condensed_Consolidating_Financ1

Condensed Consolidating Financial Information (Tables)	6 Months Ended
	Jun. 30, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'
Schedule of Condensed Consolidating Balance Sheet Information	'
	CONDENSED CONSOLIDATING BALANCE SHEET INFORMATION
		At June 30, 2014
		Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
					Subsidiaries			Subsidiaries
		(In thousands)
	Current assets	$	357,775		$	891,917		$	917,115		$	(492	)	$	2,166,315
	Property and equipment, net		—			12,467,651			1,658,043			(11,972	)		14,113,722
	Investments in subsidiaries		20,193,503			3,843,505			—			(24,037,008	)		—
	Investments in and advances to unconsolidated affiliates		—			1,388,087			7,837			25,000			1,420,924
	Intercompany accounts		—			1,932,342			—			(1,932,342	)		—
	Other non-current assets		158,090			545,733			7,167,519			—			7,871,342
		$	20,709,368		$	21,069,235		$	9,750,514		$	(25,956,814	)	$	25,572,303
	Current liabilities	$	685,324		$	961,631		$	913,853		$	(492	)	$	2,560,316
	Intercompany accounts		1,882,373			—			49,969			(1,932,342	)		—
	Deferred income taxes		2,047,103			—			309,895			—			2,356,998
	Long-term debt		11,599,978			4,836			1,001,706			—			12,606,520
	Other long-term obligations		37,287			52,511			17,143			—			106,941
	Total liabilities		16,252,065			1,018,978			2,292,566			(1,932,834	)		17,630,775
	MGM Resorts stockholders’ equity		4,457,303			20,050,257			3,973,723			(24,023,980	)		4,457,303
	Noncontrolling interests		—			—			3,484,225			—			3,484,225
	Total stockholders’ equity		4,457,303			20,050,257			7,457,948			(24,023,980	)		7,941,528
		$	20,709,368		$	21,069,235		$	9,750,514		$	(25,956,814	)	$	25,572,303
		At December 31, 2013
		Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
					Subsidiaries			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		20,017,270			4,037,168			—			(24,054,438	)		—
	Investments in and advances to unconsolidated affiliates		—			1,367,071			7,765			—			1,374,836
	Other non-current assets		167,552			542,259			7,250,887			—			7,960,698
		$	20,679,118		$	19,402,863		$	10,095,178		$	(24,066,974	)	$	26,110,185
	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		2,120,676			—			309,738			—			2,430,414
	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		16,447,939			(464,593	)		2,276,780			(25,564	)		18,234,562
	MGM Resorts stockholders’ equity		4,231,179			19,867,456			4,173,954			(24,041,410	)		4,231,179
	Noncontrolling interests		—			—			3,644,444			—			3,644,444
	Total stockholders’ equity		4,231,179			19,867,456			7,818,398			(24,041,410	)		7,875,623
		$	20,679,118		$	19,402,863		$	10,095,178		$	(24,066,974	)	$	26,110,185
Schedule of Condensed Consolidating Statement of Operations and Comprehensive Income Information	'
	CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION
		Three Months Ended June 30, 2014
		Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
					Subsidiaries			Subsidiaries
		(In thousands)
	Net revenues	$	—		$	1,617,302		$	964,352		$	(621	)	$	2,581,033
	Equity in subsidiaries’ earnings		249,078			85,446			—			(334,524	)		—
	Expenses:
	Casino and hotel operations		1,299			971,928			646,386			(621	)		1,618,992
	General and administrative		1,134			272,340			54,010			—			327,484
	Corporate expense		16,724			36,198			1,517			—			54,439
	Preopening and start-up expenses		—			1,015			8,744			—			9,759
	Property transactions, net		—			33,044			126			—			33,170
	Depreciation and amortization		—			123,853			79,217			—			203,070
			19,157			1,438,378			790,000			(621	)		2,246,914
	Income from unconsolidated affiliates		—			5,730			138			—			5,868
	Operating income (loss)		229,921			270,100			174,490			(334,524	)		339,987
	Interest expense, net of amounts capitalized		(196,215	)		(120	)		(7,601	)		—			(203,936	)
	Other, net		16,358			(14,089	)		(17,156	)		—			(14,887	)
	Income (loss) before income taxes		50,064			255,891			149,733			(334,524	)		121,164
	Benefit (provision) for income taxes		55,480			(2,108	)		(832	)		—			52,540
	Net income (loss)		105,544			253,783			148,901			(334,524	)		173,704
	Less: Net income attributable to noncontrolling interests		—			—			(68,160	)		—			(68,160	)
	Net income (loss) attributable to MGM Resorts International	$	105,544		$	253,783		$	80,741		$	(334,524	)	$	105,544
	Net income (loss)	$	105,544		$	253,783		$	148,901		$	(334,524	)	$	173,704
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment		2,999			2,999			5,862			(5,998	)		5,862
	Other comprehensive income (loss)		2,999			2,999			5,862			(5,998	)		5,862
	Comprehensive income (loss)		108,543			256,782			154,763			(340,522	)		179,566
	Less: Comprehensive income attributable to noncontrolling interests		—			—			(71,023	)		—			(71,023	)
	Comprehensive income (loss) attributable to MGM Resorts International	$	108,543		$	256,782		$	83,740		$	(340,522	)	$	108,543
		Six Months Ended June 30, 2014
		Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
					Subsidiaries			Subsidiaries
		(In thousands)
	Net revenues	$	—		$	3,173,631		$	2,039,014		$	(1,214	)	$	5,211,431
	Equity in subsidiaries’ earnings		556,049			178,815			—			(734,864	)		—
	Expenses:
	Casino and hotel operations		2,553			1,893,902			1,373,846			(1,214	)		3,269,087
	General and administrative		2,246			532,980			111,504			—			646,730
	Corporate expense		33,463			69,784			4,543			—			107,790
	Preopening and start-up expenses		—			3,006			12,389			—			15,395
	Property transactions, net		—			33,538			190			—			33,728
	Depreciation and amortization		—			251,928			158,797			—			410,725
			38,262			2,785,138			1,661,269			(1,214	)		4,483,455
	Income from unconsolidated affiliates		—			24,453			191			—			24,644
	Operating income (loss)		517,787			591,761			377,936			(734,864	)		752,620
	Interest expense, net of amounts capitalized		(397,112	)		(224	)		(15,987	)		—			(413,323	)
	Other, net		34,948			(28,452	)		(36,540	)		—			(30,044	)
	Income (loss) before income taxes		155,623			563,085			325,409			(734,864	)		309,253
	Benefit (provision) for income taxes		58,081			(467	)		(1,555	)		—			56,059
	Net income (loss)		213,704			562,618			323,854			(734,864	)		365,312
	Less: Net income attributable to noncontrolling interests		—			—			(151,608	)		—			(151,608	)
	Net income (loss) attributable to MGM Resorts International	$	213,704		$	562,618		$	172,246		$	(734,864	)	$	213,704
	Net income (loss)	$	213,704		$	562,618		$	323,854		$	(734,864	)	$	365,312
	Other comprehensive income (loss), net of tax:
	Foreign currency translation adjustment		1,482			1,482			3,102			(2,964	)		3,102
	Other		1,250			1,250			—			(1,250	)		1,250
	Other comprehensive income (loss)		2,732			2,732			3,102			(4,214	)		4,352
	Comprehensive income (loss)		216,436			565,350			326,956			(739,078	)		369,664
	Less: Comprehensive income attributable to noncontrolling interests		—			—			(153,228	)		—			(153,228	)
	Comprehensive income (loss) attributable to MGM Resorts International	$	216,436		$	565,350		$	173,728		$	(739,078	)	$	216,436
		Three Months Ended June 30, 2013
	Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
				Subsidiaries			Subsidiaries
	(In thousands)
Net revenues	$	—		$	1,513,692		$	968,039		$	(466	)	$	2,481,265
Equity in subsidiaries’ earnings		120,773			78,596			—			(199,369	)		—
Expenses:
Casino and hotel operations		1,366			920,319			658,650			(466	)		1,579,869
General and administrative		1,037			260,928			52,359			—			314,324
Corporate expense		14,646			30,375			7,343			—			52,364
Preopening and start-up expenses		—			1,248			2,258			—			3,506
Property transactions, net		—			87,980			151			—			88,131
Depreciation and amortization		—			135,887			82,264			—			218,151
		17,049			1,436,737			803,025			(466	)		2,256,345
Income from unconsolidated affiliates		—			5,620			1,062			—			6,682
Operating income (loss)		103,724			161,171			166,076			(199,369	)		231,602
Interest expense, net of amounts capitalized		(199,982	)		(2,714	)		(11,804	)		—			(214,500	)
Other, net		12,595			(39,034	)		(17,376	)		—			(43,815	)
Income (loss) before income taxes		(83,663	)		119,423			136,896			(199,369	)		(26,713	)
Benefit (provision) for income taxes		(9,295	)		5,955			(525	)		—			(3,865	)
Net income (loss)		(92,958	)		125,378			136,371			(199,369	)		(30,578	)
Less: Net income attributable to noncontrolling interests		—			—			(62,380	)		—			(62,380	)
Net income (loss) attributable to MGM Resorts International	$	(92,958	)	$	125,378		$	73,991		$	(199,369	)	$	(92,958	)
Net income (loss)	$	(92,958	)	$	125,378		$	136,371		$	(199,369	)	$	(30,578	)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		3,326			3,326			6,416			(6,652	)		6,416
Other comprehensive income (loss)		3,326			3,326			6,416			(6,652	)		6,416
Comprehensive income (loss)		(89,632	)		128,704			142,787			(206,021	)		(24,162	)
Less: Comprehensive income attributable to noncontrolling interests		—			—			(65,470	)		—			(65,470	)
Comprehensive income (loss) attributable to MGM Resorts International	$	(89,632	)	$	128,704		$	77,317		$	(206,021	)	$	(89,632	)
	Six Months Ended June 30, 2013
	Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
				Subsidiaries			Subsidiaries
	(In thousands)
Net revenues	$	—		$	2,977,657		$	1,856,701		$	(945	)	$	4,833,413
Equity in subsidiaries’ earnings		304,196			108,582			—			(412,778	)		—
Expenses:
Casino and hotel operations		2,876			1,806,402			1,265,131			(945	)		3,073,464
General and administrative		2,127			512,477			103,621			—			618,225
Corporate expense		29,454			58,114			11,420			—			98,988
Preopening and start-up expenses		—			1,020			4,632			—			5,652
Property transactions, net		—			96,275			347			—			96,622
Depreciation and amortization		—			263,718			166,351			—			430,069
		34,457			2,738,006			1,551,502			(945	)		4,323,020
Income from unconsolidated affiliates		—			21,958			1,068			—			23,026
Operating income (loss)		269,739			370,191			306,267			(412,778	)		533,419
Interest expense, net of amounts capitalized		(408,665	)		(5,699	)		(25,583	)		—			(439,947	)
Other, net		27,761			(61,852	)		(33,085	)		—			(67,176	)
Income (loss) before income taxes		(111,165	)		302,640			247,599			(412,778	)		26,296
Benefit (provision) for income taxes		24,753			7,412			(66,461	)		—			(34,296	)
Net income (loss)		(86,412	)		310,052			181,138			(412,778	)		(8,000	)
Less: Net income attributable to noncontrolling interests		—			—			(78,412	)		—			(78,412	)
Net income (loss) attributable to MGM Resorts International	$	(86,412	)	$	310,052		$	102,726		$	(412,778	)	$	(86,412	)
Net income (loss)	$	(86,412	)	$	310,052		$	181,138		$	(412,778	)	$	(8,000	)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment		(3,110	)		(3,110	)		(6,225	)		6,220			(6,225	)
Other		115			115			—			(115	)		115
Other comprehensive income (loss)		(2,995	)		(2,995	)		(6,225	)		6,105			(6,110	)
Comprehensive income (loss)		(89,407	)		307,057			174,913			(406,673	)		(14,110	)
Less: Comprehensive income attributable to noncontrolling interests		—			—			(75,297	)		—			(75,297	)
Comprehensive income (loss) attributable to MGM Resorts International	$	(89,407	)	$	307,057		$	99,616		$	(406,673	)	$	(89,407	)
Schedule of Condensed Consolidating Statement of Cash Flows Information	'
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION
		Six Months Ended June 30, 2014
		Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
					Subsidiaries			Subsidiaries
		(In thousands)
	Cash flows from operating activities
	Net cash provided by (used in) operating activities	$	(366,066	)	$	664,206		$	480,484		$	25,000		$	803,624
	Cash flows from investing activities
	Capital expenditures, net of construction payable		—			(166,418	)		(203,830	)		—			(370,248	)
	Dispositions of property and equipment		—			104			308			—			412
	Investments in and advances to unconsolidated affiliates		(11,700	)		(17,050	)		—			(25,000	)		(53,750	)
	Distributions from unconsolidated affiliates in excess of earnings		—			790			—			—			790
	Investments in treasury securities - maturities longer than 90 days		—			(93,137	)		—			—			(93,137	)
	Proceeds from treasury securities - maturities longer than 90 days		—			111,238			—			—			111,238
	Intercompany transactions		—			(462,037	)		—			462,037			—
	Other		—			2,535			—			—			2,535
	Net cash provided by (used in) investing activities		(11,700	)		(623,975	)		(203,522	)		437,037			(402,160	)
	Cash flows from financing activities
	Net repayments under bank credit facilities - maturities of 90 days or less		(1,287,750	)		—			(450,000	)		—			(1,737,750	)
	Borrowings under bank credit facilities - maturities longer than 90 days		3,001,875			—			450,000			—			3,451,875
	Repayments under bank credit facilities - maturities longer than 90 days		(1,728,125	)		—			—			—			(1,728,125	)
	Retirement of senior notes		(508,900	)		—			—			—			(508,900	)
	Intercompany accounts		849,275			(38,418	)		(348,820	)		(462,037	)		—
	Distributions to noncontrolling interest owners		—			—			(314,447	)		—			(314,447	)
	Other		(1,696	)		—			(477	)		—			(2,173	)
	Net cash provided by (used in) financing activities		324,679			(38,418	)		(663,744	)		(462,037	)		(839,520	)
	Effect of exchange rate on cash		—			—			(476	)		—			(476	)
	Cash and cash equivalents
	Net increase (decrease) for the period		(53,087	)		1,813			(387,258	)		—			(438,532	)
	Balance, beginning of period		378,660			237,457			1,187,552			—			1,803,669
	Balance, end of period	$	325,573		$	239,270		$	800,294		$	—		$	1,365,137
		Six Months Ended June 30, 2013
		Parent			Guarantor			Non-Guarantor			Elimination			Consolidated
					Subsidiaries			Subsidiaries
		(In thousands)
	Cash flows from operating activities
	Net cash provided by (used in) operating activities	$	(402,258	)	$	565,476		$	566,844		$	—		$	730,062
	Cash flows from investing activities
	Capital expenditures, net of construction payable		—			(108,574	)		(134,304	)		—			(242,878	)
	Dispositions of property and equipment		—			127			196			—			323
	Investments in and advances to unconsolidated affiliates		(12,400	)		(2,000	)		—			—			(14,400	)
	Investments in treasury securities - maturities longer than 90 days		—			(120,332	)		—			—			(120,332	)
	Proceeds from treasury securities - maturities longer than 90 days		—			135,268			—			—			135,268
	Other		—			1,806			—			—			1,806
	Net cash used in investing activities		(12,400	)		(93,705	)		(134,108	)		—			(240,213	)
	Cash flows from financing activities
	Net repayments under bank credit facilities - maturities of 90 days or less		(14,000	)		—			—			—			(14,000	)
	Borrowings under bank credit facilities - maturities longer than 90 days		2,343,000			—			450,000			—			2,793,000
	Repayments under bank credit facilities - maturities longer than 90 days		(2,343,000	)		—			(450,000	)		—			(2,793,000	)
	Retirement of senior notes		(462,226	)		(8	)		—			—			(462,234	)
	Debt issuance costs		(17,061	)		—			—			—			(17,061	)
	Intercompany accounts		756,926			(488,344	)		(268,582	)		—			—
	Distributions to noncontrolling interest owners		—			—			(259,016	)		—			(259,016	)
	Other		(1,346	)		—			(341	)		—			(1,687	)
	Net cash provided by (used in) financing activities		262,293			(488,352	)		(527,939	)		—			(753,998	)
	Effect of exchange rate on cash		—			—			(687	)		—			(687	)
	Cash and cash equivalents
	Net decrease for the period		(152,365	)		(16,581	)		(95,890	)		—			(264,836	)
	Balance, beginning of period		254,385			226,242			1,062,882			—			1,543,509
	Balance, end of period	$	102,020		$	209,661		$	966,992		$	—		$	1,278,673

Organization_Additional_Inform

Organization - Additional Information (Detail) (USD $)

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2013

Segment

Borgata Trust [Member]

Borgata Trust [Member]

Borgata Trust [Member]

Borgata Trust [Member]

CityCenter Holdings, LLC [Member]

CityCenter Holdings, LLC [Member]

Grand Victoria [Member]

Grand Victoria [Member]

Silver Legacy [Member]

Co-venturer [Member]

Co-venturer [Member]

Co-venturer [Member]

Co-venturer [Member]

Co-venturer [Member]

Mississippi [Member]

MGM China [Member]

Aria and Vdara [Member]

Aria and Vdara [Member]

Crystals [Member]

MGM National Harbor [Member]

MGM Cotai [Member]

MGM Cotai [Member]

MGM Springfield [Member]

Anschutz Entertainment Group, Inc [Member]

Anschutz Entertainment Group, Inc [Member]

Anschutz Entertainment Group, Inc [Member]

U.S. treasury securities [Member]

U.S. treasury securities [Member]

U.S. treasury securities [Member]

Infinity World Development Corp [Member]

Hyatt Gaming [Member]

Eldorado LLC [Member]

Boyd [Member]

MGM Hakkasan [Member]

Resort

CityCenter Holdings, LLC [Member]

Sales [Member]

CityCenter Holdings, LLC [Member]

Scenario, Forecast [Member]

Scenario, Forecast [Member]

Scenario, Forecast [Member]

Scenario, Forecast [Member]

Scenario, Forecast [Member]

Scenario, Forecast [Member]

Scenario, Forecast [Member]

Minimum [Member]

Maximum [Member]

CityCenter Holdings, LLC [Member]

Grand Victoria [Member]

Silver Legacy [Member]

Borgata Trust [Member]

MGM Hakasan Hospitality [Member]

CityCenter Holdings, LLC [Member]

sqft

Slot

Macau [Member]

Massachusetts [Member]

Minimum [Member]

Maximum [Member]

Slot

Room

acre

Room

Seat

Seat

Room

games

Slot

Seat

acre

games

games

Restaurants

sqft

ORGANIZATION

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of resorts owned and operated

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

'

'

'

'

'

'

'

'

Percentage ownership interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

51.00%

'

'

'

'

'

'

'

'

'

'

Area of development site (in acres)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

17.8

14.5

'

'

'

Number of hotel rooms

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300

1,600

'

250

'

'

'

Number of gaming tables

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

160

500

'

75

'

'

'

Number of slots

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,600

2,500

'

3,000

'

'

'

Total estimated project budget excluding development fees eliminated in consolidation, capitalized interest and land

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$2,900,000,000

'

'

'

'

'

Percentage of ownership interests

'

'

'

'

'

50.00%

50.00%

50.00%

50.00%

50.00%

50.00%

50.00%

50.00%

50.00%

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

Management fee as a percentage of revenues

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.00%

'

'

'

'

'

'

'

'

Management fee received, percentage of EBITDA

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.00%

'

'

'

'

'

'

'

'

'

Annual management fee

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,000,000

'

'

'

'

'

'

'

Joint venture agreement, description

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'The Company and the Hakkasan Group formed MGM Hakkasan Hospitality (bMGM Hakkasanb), 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.

'

'

'

'

'

'

'

'

'

'

'

'

Expected development and construction cost, excluding capitalized and land related costs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,200,000,000

'

'

690,000,000

350,000,000

'

'

Number of seats

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,000

'

'

'

'

18,000

20,000

Area of land

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

35,000

'

'

55,000

'

'

'

Number of Restaurants

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

15

'

'

'

Expected completion period of construction

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'2016

'

'

Number of reportable segments

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of ownership interests, cost method investment

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Period during which trustee is responsible for selling the trust property if the trust property is not sold during the mandated sale period

'

'12 months

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Trust assets

'

$86,000,000

$69,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maturity period of investments

'

'

'

'3 months

'1 year

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basis_of_Presentation_and_Sign2

Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended					3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2014	Jun. 30, 2014
					ASU 2013-11 [Member]	Foreign Tax Authority [Member]	Foreign Tax Authority [Member]	IRS [Member]
						Macau [Member]	Macau [Member]
						MGM Grand Paradise, S.A. [Member]	MGM Grand Paradise, S.A. [Member]
							Scenario, Forecast [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'	'
Effective income tax rate	-43.40%	'	-18.10%	'	'	'	'	'
Complementary tax rate (as a percent)	'	'	'	'	'	12.00%	'	'
Period exempted from complementary tax, second exemption period granted	'	'	'	'	'	'5 years	'	'
Third exemption period from complementary tax assumed based on third exemption period granted to a competitor	'	'	'	'	'	'5 years	'	'
Net deferred foreign tax credit asset	'	'	'	'	'	'	$335,000,000	'
Fourth exemption period	'	'	'	'	'	'5 years	'	'
Reduction in unrecognized tax benefits	'	'	'	'	19,000,000	'	'	81,000,000
Income tax benefit	-52,540,000	3,865,000	-56,059,000	34,296,000	'	'	'	-31,000,000
Deposits of cash taxes and interest	'	'	'	'	'	'	'	30,000,000
Reduction in deferred tax assets	'	'	'	'	$19,000,000	'	'	'

Investments_in_and_Advances_to2

Investments in and Advances to Unconsolidated Affiliates - Schedule of Investments in and Advances to Unconsolidated Affiliates (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Equity Method Investments [Line Items]	'	'
Investments in and advances to unconsolidated affiliates	$1,420,924	$1,374,836
CityCenter Holdings, LLC [Member]	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in and advances to unconsolidated affiliates	1,226,940	1,172,087
Elgin Riverboat Resort-Riverboat Casino [Member]	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in and advances to unconsolidated affiliates	140,000	169,579
Other [Member]	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Investments in and advances to unconsolidated affiliates	$53,984	$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)	Jun. 30, 2014	Dec. 31, 2013
CityCenter Holdings, LLC [Member]	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Percentage of ownership interests	50.00%	50.00%
Elgin Riverboat Resort-Riverboat Casino [Member]	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Percentage of ownership interests	50.00%	50.00%

Investments_in_and_Advances_to4

Investments in and Advances to Unconsolidated Affiliates - Schedule of Results of Operations of Unconsolidated Affiliates (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Equity Method Investments And Joint Ventures [Abstract]	'	'	'	'
Income from unconsolidated affiliates	$5,868	$6,682	$24,644	$23,026
Preopening and start-up expenses	-101	'	-120	-376
Non-operating items from unconsolidated affiliates	-14,578	-38,864	-28,301	-60,943
Income from unconsolidated affiliates	($8,811)	($32,182)	($3,777)	($38,293)

Investments_in_and_Advances_to5

Investments in and Advances to Unconsolidated Affiliates - Additional Information (Detail) (Grand Victoria [Member], USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Schedule of Equity Method Investments [Line Items]	'	'	'	'
Investment impairment charge	$28,789,000	$36,607,000	$28,789,000	$36,607,000
Percentage of ownership interests	50.00%	50.00%	50.00%	50.00%
Fair Value, Inputs, Level 3 [Member]	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'
Estimated fair value	$140,000,000	$170,000,000	$140,000,000	$170,000,000
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%	'
Discount rate (as a percent)	'	'	10.50%	'

Investments_in_and_Advances_to6

Investments in and Advances to Unconsolidated Affiliates - Summarized Balance Sheet Information (Detail) (CityCenter Holdings, LLC [Member], USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
CityCenter Holdings, LLC [Member]	'	'
Schedule of Equity Method Investments [Line Items]	'	'
Current assets	$494,634	$451,058
Property and other assets, net	8,070,612	8,261,240
Current liabilities	511,485	462,487
Long-term debt and other long-term obligations	1,552,353	1,688,113
Equity	$6,501,408	$6,561,698

Investments_in_and_Advances_to7

Investments in and Advances to Unconsolidated Affiliates - Summarized Income Statement Information (Detail) (CityCenter Holdings, LLC [Member], USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
CityCenter Holdings, LLC [Member]	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'
Net revenues	$319,875	$333,174	$656,292	$648,316
Operating expenses	-344,710	-356,948	-676,164	-672,258
Operating loss	-24,835	-23,774	-19,872	-23,942
Non-operating expenses	-26,953	-101,992	-52,118	-169,667
Net loss	($51,788)	($125,766)	($71,990)	($193,609)

LongTerm_Debt_Schedule_of_Long

Long-Term Debt - Schedule of Long-Term Debt (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Long-term debt	$12,923,714	$13,447,230
Less: Current portion	-317,194	'
Long-term debt, Noncurrent	12,606,520	13,447,230
Senior credit facility term loans, net [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	2,751,575	2,765,041
MGM Grand Paradise credit facility [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	553,520	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	1,453,795	1,456,153
6.625% senior notes, due 2015, net [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	875,701	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	497,459	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	468,178	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
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

6 Months Ended

12 Months Ended

1 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Feb. 28, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2011

Apr. 30, 2010

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

5.875% senior notes, due 2014, net [Member]

5.875% senior notes, due 2014, net [Member]

5.875% senior notes, due 2014, net [Member]

4.25% convertible senior notes, due 2015, net [Member]

4.25% convertible senior notes, due 2015, net [Member]

4.25% convertible senior notes, due 2015, net [Member]

4.25% convertible senior notes, due 2015, net [Member]

6.625% senior notes, due 2015, net [Member]

6.625% senior notes, due 2015, net [Member]

6.875% senior notes, due 2016 [Member]

6.875% senior notes, due 2016 [Member]

7.5% senior notes, due 2016 [Member]

7.5% senior notes, due 2016 [Member]

10% senior notes, due 2016, net [Member]

10% senior notes, due 2016, net [Member]

7.625% senior notes, due 2017 [Member]

7.625% senior notes, due 2017 [Member]

11.375% senior notes, due 2018, net [Member]

11.375% senior notes, due 2018, net [Member]

8.625% senior notes, due 2019 [Member]

8.625% senior notes, due 2019 [Member]

5.25% senior notes, due 2020 [Member]

5.25% senior notes, due 2020 [Member]

6.75% senior notes, due 2020 [Member]

6.75% senior notes, due 2020 [Member]

6.625% senior notes, due 2021 [Member]

6.625% senior notes, due 2021 [Member]

7.75% senior notes, due 2022 [Member]

7.75% senior notes, due 2022 [Member]

7% debentures, due 2036, net [Member]

7% debentures, due 2036, net [Member]

6.7% debentures, due 2096 [Member]

6.7% debentures, due 2096 [Member]

Senior credit facility term loans, net [Member]

Senior credit facility term loans, net [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, principal amount

'

$508.90

$508.90

$300

$1,150

$1,450

$1,450

$875

$875

$242.90

$242.90

$732.70

$732.70

$500

$500

$743

$743

$475

$475

$850

$850

$500

$500

$1,000

$1,000

$1,250

$1,250

$1,000

$1,000

$0.60

$0.60

$4.30

$4.30

$2,758

$2,772

Long-term debt, interest rate (as a percent)

5.88%

5.88%

5.88%

4.25%

4.25%

4.25%

4.25%

6.63%

6.63%

6.88%

6.88%

7.50%

7.50%

10.00%

10.00%

7.63%

7.63%

11.38%

11.38%

8.63%

8.63%

5.25%

5.25%

6.75%

6.75%

6.63%

6.63%

7.75%

7.75%

7.00%

7.00%

6.70%

6.70%

'

'

Long-term debt, maturity year

'2014

'2014

'2014

'2015

'2015

'2015

'2015

'2015

'2015

'2016

'2016

'2016

'2016

'2016

'2016

'2017

'2017

'2018

'2018

'2019

'2019

'2020

'2020

'2020

'2020

'2021

'2021

'2022

'2022

'2036

'2036

'2096

'2096

'

'

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail) (USD $)

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Feb. 28, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2011

Apr. 30, 2010

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Senior credit facility term loans, net [Member]

Senior credit facility term loans, net [Member]

5.875% senior notes, due 2014, net [Member]

5.875% senior notes, due 2014, net [Member]

5.875% senior notes, due 2014, net [Member]

4.25% convertible senior notes, due 2015, net [Member]

4.25% convertible senior notes, due 2015, net [Member]

4.25% convertible senior notes, due 2015, net [Member]

4.25% convertible senior notes, due 2015, net [Member]

Senior credit facility revolving loans [Member]

Senior credit facility revolving loans [Member]

Senior credit facility term loan A [Member]

Senior credit facility term loan A [Member]

Senior credit facility term loan A [Member]

Senior credit facility term loan B [Member]

Senior credit facility term loan B [Member]

Senior credit facility term loan B [Member]

Senior credit facility [Member]

Senior credit facility [Member]

Senior credit facility [Member]

Senior credit facility [Member]

Senior credit facility [Member]

Senior credit facility [Member]

Senior credit facility [Member]

Senior credit facility [Member]

Senior credit facility [Member]

Senior credit facility [Member]

Amended and restated MGM China credit facility [Member]

Amended and restated MGM China credit facility [Member]

Amended and restated MGM China credit facility [Member]

Amended and restated MGM China credit facility [Member]

Amended and restated MGM China credit facility [Member]

Amended and restated MGM China credit facility [Member]

MGM China credit facility, Term loans [Member]

MGM China credit facility, revolving credit facility [Member]

MGM China credit facility, revolving credit facility [Member]

MGM China credit facility, revolving credit facility [Member]

MGM China credit facility, revolving credit facility [Member]

LIBOR [Member]

LIBOR [Member]

LIBOR [Member]

Collateralized land and assets of MGM Grand Detroit [Member]

Debt Covenant Terms March 31, 2015 [Member]

Debt Covenant Terms June 30, 2015 [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

HIBOR [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

MGM China [Member]

MGM China [Member]

HIBOR [Member]

Maximum [Member]

Minimum [Member]

MGM Grand Detroit, LLC [Member]

Collateralized land and assets of MGM Grand Las Vegas, Bellagio and The Mirage [Member]

Debt Covenant Terms 2014 [Member]

Debt Covenant Terms June 30, 2014 [Member]

Debt Covenant Terms September 30, 2014 [Member]

Debt Covenant Terms December 31, 2014 [Member]

MGM China [Member]

HIBOR [Member]

Debt Covenant Terms Prior to First Anniversary of MGM Cotai Opening [Member]

Debt Covenant Terms Subsequent to First Anniversary of MGM Cotai Opening [Member]

MGM China [Member]

HIBOR [Member]

MGM China [Member]

HIBOR [Member]

HIBOR [Member]

MGM China [Member]

MGM China [Member]

MGM China [Member]

MGM China [Member]

MGM China [Member]

MGM China [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility amount

'

'

'

'

'

'

'

'

'

'

'

$1,200,000,000

'

$1,030,000,000

$1,030,000,000

'

$1,720,000,000

$1,720,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$550,000,000

'

$1,450,000,000

'

'

Variable interest rate base

'

'

'

'

'

'

'

'

'

'

'

'

'LIBOR

'

'

'LIBOR

'

'

'LIBOR

'

'

'

'

'

'

'

'

'

'

'HIBOR

'

'

'

'

'

'

'

'HIBOR

'

'

Interest rate margin (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

2.75%

'

'

2.75%

'

'

2.50%

'

'

'

'

'

'

'

'

'

'

1.75%

2.50%

'

'

'

1.75%

'

'

1.75%

2.50%

1.75%

Interest rate floor (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, maturity date

'

'

'

'

'

'

'

'

'

'

'

20-Dec-17

'

'

20-Dec-17

'

'

20-Dec-19

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3-Oct-17

'

'

'

Amortization payments of original principal balance (as percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

0.25%

'

'

0.25%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repayments

'

'

7,000,000

14,000,000

509,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

1,200,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest rate at the end of the period (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

2.90%

2.90%

'

3.50%

3.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, collateral amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

450,000,000

'

'

'

3,350,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Trailing annual earnings before interest, taxes, depreciation and amortization (EBITDA)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,380,000,000

'

1,250,000,000

1,250,000,000

'

'

'

1,100,000,000

1,200,000,000

1,200,000,000

'

'

'

'

'

'

'

'

'

'

'

Annual capital expenditures

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

500,000,000

'

681,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Consolidated leverage ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.5

4

'

'

'

'

'

'

'

Consolidated interest coverage ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.5

'

'

'

'

'

'

Long-term debt, interest rate (as a percent)

'

'

'

'

5.88%

5.88%

5.88%

4.25%

4.25%

4.25%

4.25%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, maturity year

'

'

'

'

'2014

'2014

'2014

'2015

'2015

'2015

'2015

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, principal amount

'

'

'

'

'

508,900,000

508,900,000

300,000,000

1,150,000,000

1,450,000,000

1,450,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from convertible debt

'

'

'

'

'

'

'

311,000,000

1,120,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Conversion ratio, number of shares per $1,000 principal amount, numerator

'

'

'

'

'

'

'

'

53.83

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Conversion ratio, principal amount denominator

'

'

'

'

'

'

'

'

1,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, fair value

$14,700,000,000

$14,900,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Commitments_and_Contingencies_

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

Jun. 30, 2014

Jun. 30, 2014

Jan. 09, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jul. 31, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Oct. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Feb. 24, 2014

Aug. 31, 2013

Apr. 30, 2010

Apr. 30, 2014

Mar. 31, 2010

Jun. 30, 2014

MGM Resorts International [Member]

Cotai land concession contract [Member]

Cotai land concession contract [Member]

Cotai land concession contract [Member]

Cotai land concession contract [Member]

Cotai land concession contract [Member]

Cotai land concession contract [Member]

Senior credit facility [Member]

Senior credit facility [Member]

Amended and restated MGM China credit facility [Member]

Amended and restated MGM China credit facility [Member]

CityCenter Holdings, LLC [Member]

CityCenter Holdings, LLC [Member]

CityCenter Holdings, LLC [Member]

CityCenter Holdings, LLC [Member]

CityCenter Holdings, LLC [Member]

CityCenter Holdings, LLC [Member]

CityCenter Holdings, LLC [Member]

CityCenter Holdings, LLC [Member]

CityCenter Holdings, LLC [Member]

CityCenter Holdings, LLC [Member]

Completion guarantee [Member]

MGM Grand Paradise, S.A. [Member]

MGM Grand Paradise, S.A. [Member]

MGM Grand Paradise, S.A. [Member]

MGM China [Member]

MGM China [Member]

Guarantees [Member]

Guarantees [Member]

MGM China [Member]

MGM China [Member]

Completion guarantee [Member]

MGM Resorts International [Member]

Perini construction agreement [Member]

Perini Litigation [Member]

Perini Litigation [Member]

Perini Litigation [Member]

Perini Litigation [Member]

Perini Litigation [Member]

Pending Litigation [Member]

Pending Litigation [Member]

Payments

Macau [Member]

Payments

Subsequent Event [Member]

Letters of credit [Member]

Guarantees [Member]

Completion guarantee [Member]

MGM Resorts International [Member]

Perini construction agreement [Member]

Perini construction agreement [Member]

Perini construction agreement [Member]

Perini construction agreement [Member]

Perini construction agreement [Member]

Perini construction agreement [Member]

acre

Letters of credit [Member]

Completion guarantee [Member]

Insurance settlement [Member]

Subcontractor

Loss Contingencies [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Damages sought

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$174,000,000

$167,000,000

$491,000,000

'

$490,000,000

'

Number of claims resolved

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

219

Number of claims for further proceedings

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3

Settlement related to loss and damage, net of deductible

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

55,000,000

'

'

Liable to pay lawsuit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

170,000,000

'

'

'

'

'

'

Net residential proceeds to fund or reimburse construction costs

'

'

'

'

'

'

'

'

'

'

'

72,000,000

'

'

'

'

'

'

'

'

'

Estimated obligation offset by condominium proceeds

'

'

'

'

'

'

'

'

'

'

'

'

72,000,000

72,000,000

'

'

'

'

'

'

'

Amount funded under completion guarantee

727,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Remaining estimated net obligation under the completion guarantee

'

'

'

'

'

'

'

'

'

'

'

'

'

128,000,000

'

'

'

'

'

'

'

Area of development site (in acres)

'

'

'

'

17.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Land concession contract effective date

'

9-Jan-13

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Initial term of contract

'

'

'25 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payable for land concession contract

'

'

161,000,000

'

'

73,000,000

15,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Remaining number of semi-annual payments

'

'

8

'

'

5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Contract premium, recorded within other long-term assets

'

'

'

'

'

86,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Concession contract rent paid per year during development

'

'

'

269,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Concession contract rent paid per year after development

'

'

'

681,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Annual rent review period

'

'

'

'5 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount that can be issued

'

'

'

'

'

'

'

'

500,000,000

'

100,000,000

'

'

'

'

'

'

'

'

'

'

Letters of credit

'

'

'

'

'

'

'

$35,000,000

'

$39,000,000

'

'

'

'

'

'

'

'

'

'

'

Income_Loss_Per_Share_of_Commo2

Income (Loss) Per Share of Common Stock - Schedule of Weighted-Average Number of Common and Common Equivalent Shares Used in the Calculation of Basic and Diluted Income (Loss) Per Share (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:	'	'	'	'
Net income (loss) attributable to MGM Resorts International-basic	$105,544	($92,958)	$213,704	($86,412)
Interest on convertible debt, net of tax	2,103	'	4,298	'
Potentially dilutive effect due to MGM China share option plan	-84	'	-213	'
Net income (loss) attributable to MGM Resorts International-diluted	$107,563	($92,958)	$217,789	($86,412)
Denominator:	'	'	'	'
Weighted-average common shares outstanding-basic	490,786	489,484	490,692	489,388
Potential dilution from share-based awards	6,436	'	6,446	'
Potential dilution from assumed conversion of convertible debt	16,149	'	16,149	'
Weighted-average common and common equivalent shares-diluted	513,371	489,484	513,287	489,388
Antidilutive share-based awards excluded from the calculation of diluted earnings per share	2,534	18,498	2,580	18,498

Income_Loss_Per_Share_of_Commo3

Income (Loss) Per Share of Common Stock - Additional Information (Detail) (4.25% convertible senior notes, due 2015, net [Member], USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2011	Apr. 30, 2010	Jun. 30, 2014	Jun. 30, 2014
In Millions, unless otherwise specified					Dilutive Convertible Debt Issued June 2011 [Member]	Antidilutive Convertible Debt Issued April 2010 [Member]
Investment Holdings [Line Items]	'	'	'	'	'	'
Long-term debt, principal amount	$1,450	$1,450	$300	$1,150	$300	$1,150
Long-term debt, interest rate (as a percent)	4.25%	4.25%	4.25%	4.25%	4.25%	4.25%
Long-term debt, issuance date	'	'	'	'	'2011-06	'2010-04

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	1 Months Ended							0 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013	Jun. 30, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2013	Jun. 30, 2014	Mar. 31, 2014	Aug. 05, 2014	Aug. 05, 2014
	Non-controlling Interests [Member]	Non-controlling Interests [Member]	Non-controlling Interests [Member]	MGM China [Member]	MGM China [Member]	MGM China [Member]	MGM China [Member]	MGM China [Member]	MGM China [Member]
		Final dividend [Member]	Final dividend [Member]			Final dividend [Member]	Final dividend [Member]	Subsequent Event [Member]	Subsequent Event [Member]
Class of Stock [Line Items]	'	'	'	'	'	'	'	'	'
Dividends paid	$245	$62	$245	$499	$500	$127	'	'	'
Dividend remained within the consolidated entity	'	'	'	'	255	65	254	'	'
Dividends declared	'	'	'	'	'	'	'	'	136
Dividends receivable	'	'	'	'	'	'	'	'	$69
Percentage of dividend declared	'	'	'	'	'	'	'	'	51.00%
Dividend record date	'	'	'	'	'	'	'	25-Aug-14	'
Dividend distribution date	'	'	'	'	'	'	'	1-Sep-14	'

Stockholders_Equity_Changes_in

Stockholders' Equity - Changes in Stockholders' Equity (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Increase (Decrease) in Stockholders' Equity	'	'	'	'
Balances	'	'	$7,875,623	'
Net income	173,704	-30,578	365,312	-8,000
Foreign currency translation adjustment	5,862	6,416	3,102	-6,225
Other comprehensive income from unconsolidated affiliate, net	'	'	1,250	115
Stock-based compensation	'	'	17,134	'
Change in excess tax benefit from stock-based compensation	'	'	-9,263	'
Issuance of MGM Resorts common stock pursuant to stock-based compensation awards	'	'	-3,751	'
Cash distributions to noncontrolling interest owners	'	'	-314,865	'
Issuance of performance share units	'	'	7,529	'
Other	'	'	-543	'
Balances	7,941,528	'	7,941,528	'
MGM Resorts Stockholders' Equity [Member]	'	'	'	'
Increase (Decrease) in Stockholders' Equity	'	'	'	'
Balances	'	'	4,231,179	'
Net income	'	'	213,704	'
Foreign currency translation adjustment	'	'	1,482	'
Other comprehensive income from unconsolidated affiliate, net	'	'	1,250	'
Stock-based compensation	'	'	15,450	'
Change in excess tax benefit from stock-based compensation	'	'	-9,263	'
Issuance of MGM Resorts common stock pursuant to stock-based compensation awards	'	'	-3,751	'
Issuance of performance share units	'	'	7,529	'
Other	'	'	-277	'
Balances	4,457,303	'	4,457,303	'
Non-controlling Interests [Member]	'	'	'	'
Increase (Decrease) in Stockholders' Equity	'	'	'	'
Balances	'	'	3,644,444	'
Net income	'	'	151,608	'
Foreign currency translation adjustment	'	'	1,620	'
Stock-based compensation	'	'	1,684	'
Cash distributions to noncontrolling interest owners	'	'	-314,865	'
Other	'	'	-266	'
Balances	$3,484,225	'	$3,484,225	'

Stockholders_Equity_Schedule_o

Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Balances, beginning of the period	$12,503
Current period other comprehensive income	2,732
Balances, end of the period	15,235
Foreign Currency Translation Adjustment [Member]	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Balances, beginning of the period	13,082
Current period other comprehensive income	1,482
Balances, end of the period	14,564
Other Adjustments [Member]	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'
Balances, beginning of the period	-579
Current period other comprehensive income	1,250
Balances, end of the period	$671

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended	1 Months Ended	6 Months Ended	1 Months Ended	6 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014
		Bonus PSU Policy [Member]	RSUs [Member]	Stock Options [Member]	Omnibus Plan [Member]	Omnibus Plan [Member]	MGM China Share Option Plan [Member]	MGM China Share Option Plan [Member]
			Board of Directors [Member]	MGM China [Member]		RSUs [Member]		Stock Options [Member]
			Deferred Compensation, Share-based Payments [Member]					MGM China [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'	'
Number of shares available for grant as share-based awards	'	'	'	'	16,000,000	'	'	341,000,000
Increase in number of shares of common stock available for grant	'	'	'	'	10,000,000	'	'	'
Vested RSUs	'	'	53,000	'	'	95,000	'	'
Granted (in shares)	'	265,122	'	'	'	50,000	'	'
Granted, target price (in dollars per share)	'	$31.72	'	'	'	'	'	'
Number of shares granted during the period	'	'	'	17,000,000	'	'	18,080,000	'
Expected volatility	39.00%	'	'	'	'	'	'	'
Expected term	'7 years 9 months 18 days	'	'	'	'	'	'	'
Expected dividend yield	1.60%	'	'	'	'	'	'	'
Risk-free interest rate	1.80%	'	'	'	'	'	'	'
Weighted-average fair value of options granted	$1.04	'	'	'	'	'	'	'

StockBased_Compensation_Summar

Stock-Based Compensation - Summary of Stock Options and Stock Appreciation Rights Activity (Detail) (Omnibus Plan [Member], USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 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)	65
Exercised (in shares)	-1,040
Forfeited or expired (in shares)	-341
Outstanding at the end of the period (in shares)	14,758
Exercisable at the end of the period (in shares)	9,295
Outstanding at the beginning of the period (in dollars per share)	$15.22
Granted (in dollars per share)	$25.62
Exercised (in dollars per share)	$14.91
Forfeited or expired (in dollars per share)	$54.82
Outstanding at the end of the period (in dollars per share)	$14.37
Exercisable at the end of the period (in dollars per share)	$15.01

StockBased_Compensation_Schedu

Stock-Based Compensation - Schedule of Restricted Stock Units and Performance Share Units Activity (Detail) (Omnibus Plan [Member], USD $)	6 Months Ended
	Jun. 30, 2014
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)	'
Vested (in shares)	'
Forfeited (in shares)	'
Nonvested at the end of the period (in shares)	1,055,000
Nonvested at the beginning of the period (in dollars per share)	$13.91
Granted (in dollars per share)	'
Vested (in dollars per share)	'
Forfeited (in dollars per share)	'
Nonvested at the end of the period (in dollars per share)	$13.91
Nonvested at the beginning of period, Weighted Average Target Price (in dollars per share)	$16.95
Nonvested at the end of period, Weighted Average Target Price (in dollars per share)	$16.95
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)	50,000
Vested (in shares)	-95,000
Forfeited (in shares)	-14,000
Nonvested at the end of the period (in shares)	1,280,000
Nonvested at the beginning of the period (in dollars per share)	$13.85
Granted (in dollars per share)	$25.37
Vested (in dollars per share)	$13.99
Forfeited (in dollars per share)	$13.14
Nonvested at the end of the period (in dollars per share)	$14.30

StockBased_Compensation_Summar1

Stock-Based Compensation - Summary of Stock Options Activity (Detail) (MGM China Share Option Plan [Member], USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
MGM China Share Option 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)	18,080
Exercised (in shares)	-258
Forfeited or expired (in shares)	-263
Outstanding at the end of the period (in shares)	34,475
Exercisable at the end of the period (in shares)	10,267
Outstanding at the beginning of the period (in dollars per share)	$2.06
Granted (in dollars per share)	$3.49
Exercised (in dollars per share)	$1.91
Forfeited or expired (in dollars per share)	$2.28
Outstanding at the end of the period (in dollars per share)	$2.81
Exercisable at the end of the period (in dollars per share)	$2

StockBased_Compensation_Schedu1

Stock-Based Compensation - Schedule of Compensation Cost Recognized (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Compensation cost:	'	'	'	'
Compensation cost	$8,671	$8,194	$17,134	$17,134
Less: Reimbursed costs and other	-266	-262	-534	-579
Compensation cost recognized as expense	8,405	7,932	16,600	16,555
Less: Related tax benefit	-2,209	'	-4,526	'
Compensation expense, net of tax benefit	6,196	7,932	12,074	16,555
Omnibus Plan [Member]	'	'	'	'
Compensation cost:	'	'	'	'
Compensation cost	6,695	6,508	13,697	13,768
MGM China Share Option Plan [Member]	'	'	'	'
Compensation cost:	'	'	'	'
Compensation cost	$1,976	$1,686	$3,437	$3,366

Property_Transactions_Net_Sche

Property Transactions, Net - Schedule of Property Transactions, Net (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Property, Plant and Equipment [Line Items]	'	'	'	'
Corporate buildings impairment charge	'	$44,510	'	$44,510
Other property transactions, net	4,381	7,014	4,939	15,505
Property transactions, net	33,170	88,131	33,728	96,622
Grand Victoria [Member]	'	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'	'
Investment impairment charge	$28,789	$36,607	$28,789	$36,607

Property_Transactions_Net_Addi

Property Transactions, Net - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2013
Property, Plant and Equipment [Line Items]	'	'
Corporate buildings impairment charges	$44,510	$44,510
Joint Venture [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Percentage of ownership interests	50.00%	50.00%

Segment_Information_Additional

Segment Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 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		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]	'	'	'	'
Net revenues	$2,581,033	$2,481,265	$5,211,431	$4,833,413
Adjusted EBITDA	585,986	541,390	1,212,468	1,065,762
Other operating expense:	'	'	'	'
Preopening and start-up expenses	-9,759	-3,506	-15,395	-5,652
Property transactions, net	-33,170	-88,131	-33,728	-96,622
Depreciation and amortization	-203,070	-218,151	-410,725	-430,069
Operating income	339,987	231,602	752,620	533,419
Non-operating income (expense):	'	'	'	'
Interest expense, net of amounts capitalized	-203,936	-214,500	-413,323	-439,947
Non-operating items from unconsolidated affiliates	-14,578	-38,864	-28,301	-60,943
Other, net	-309	-4,951	-1,743	-6,233
Total non-operating income (expense)	-218,823	-258,315	-443,367	-507,123
Income (loss) before income taxes	121,164	-26,713	309,253	26,296
Benefit (provision) for income taxes	52,540	-3,865	56,059	-34,296
Net income (loss)	173,704	-30,578	365,312	-8,000
Less: Net income attributable to noncontrolling interests	-68,160	-62,380	-151,608	-78,412
Net income (loss) attributable to MGM Resorts International	105,544	-92,958	213,704	-86,412
Reportable segments [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net revenues	2,467,198	2,371,145	4,978,880	4,607,890
Adjusted EBITDA	624,886	580,418	1,268,457	1,121,910
Reportable segments [Member] | Wholly owned domestic resorts [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net revenues	1,639,270	1,535,996	3,209,504	3,025,184
Adjusted EBITDA	414,398	375,603	817,244	736,640
Reportable segments [Member] | MGM China [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net revenues	827,928	835,149	1,769,376	1,582,706
Adjusted EBITDA	210,488	204,815	451,213	385,270
Corporate and other [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net revenues	113,835	110,120	232,551	225,523
Adjusted EBITDA	($38,900)	($39,028)	($55,989)	($56,148)

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)

6 Months Ended

12 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

3 Months Ended

6 Months Ended

In Millions, unless otherwise specified

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

MGM Branding and Development and MGM China [Member]

MGM Branding and Development and MGM China [Member]

MGM Branding and Development and MGM China [Member]

MGM Branding and Development and MGM China [Member]

MGM Branding and Development and MGM China [Member]

MGM Branding and Development and MGM China [Member]

MGM Branding and Development and MGM China [Member]

MGM Branding and Development and MGM China [Member]

MGM Branding and Development and MGM China [Member]

MGM Branding and Development [Member]

MGM Branding and Development [Member]

MGM Branding and Development [Member]

MGM Branding and Development [Member]

Development services agreement [Member]

Development services agreement [Member]

Development services agreement [Member]

Brand license agreement [Member]

Brand license agreement [Member]

Brand license agreement [Member]

Brand license agreement [Member]

Brand license agreement [Member]

Brand license agreement [Member]

Ms. Pansy Ho [Member]

Ms. Pansy Ho [Member]

Ms. Pansy Ho [Member]

Ms. Pansy Ho [Member]

Scenario, Forecast [Member]

Ms. Pansy Ho [Member]

Ms. Pansy Ho [Member]

Ms. Pansy Ho [Member]

Ms. Pansy Ho [Member]

Scenario, Forecast [Member]

Maximum [Member]

Maximum [Member]

Related Party Transaction [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

License fee as percentage of MGM China consolidated net revenue

'

'

'

1.75%

'

'

'

'

'

'

'

'

'

License fee cap

'

'

'

'

'

'

'

'

$43

'

'

'

'

Per annum percentage increase in development fee annual cap

10.00%

'

'

20.00%

'

'

'

'

'

'

'

'

'

License fees

'

'

'

'

14

15

31

28

'

'

'

'

'

Development fee as percentage of project cost

2.63%

'

'

'

'

'

'

'

'

'

'

'

'

Development fees

0

15

24

'

'

'

'

'

'

'

'

'

'

Distribution made to noncontrolling interests

'

'

'

'

'

'

'

'

'

$5

$4

$8

$14

Condensed_Consolidating_Financ2

Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Balance Sheet Information (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Condensed Financial Statements, Captions [Line Items]	'	'
Current assets	$2,166,315	$2,719,439
Property and equipment, net	14,113,722	14,055,212
Investments in and advances to unconsolidated affiliates	1,420,924	1,374,836
Other non-current assets	7,871,342	7,960,698
Total assets	25,572,303	26,110,185
Current liabilities	2,560,316	2,215,328
Deferred income taxes	2,356,998	2,430,414
Long-term debt	12,606,520	13,447,230
Other long-term obligations	106,941	141,590
Total liabilities	17,630,775	18,234,562
MGM Resorts stockholders' equity	4,457,303	4,231,179
Noncontrolling interests	3,484,225	3,644,444
Total stockholders' equity	7,941,528	7,875,623
Total liabilities and stockholders' equity	25,572,303	26,110,185
Elimination [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Current assets	-492	-564
Property and equipment, net	-11,972	-11,972
Investments in subsidiaries	-24,037,008	-24,054,438
Investments in and advances to unconsolidated affiliates	25,000	'
Intercompany accounts	-1,932,342	'
Total assets	-25,956,814	-24,066,974
Current liabilities	-492	-25,564
Intercompany accounts	-1,932,342	'
Total liabilities	-1,932,834	-25,564
MGM Resorts stockholders' equity	-24,023,980	-24,041,410
Total stockholders' equity	-24,023,980	-24,041,410
Total liabilities and stockholders' equity	-25,956,814	-24,066,974
Parent [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Current assets	357,775	494,296
Investments in subsidiaries	20,193,503	20,017,270
Other non-current assets	158,090	167,552
Total assets	20,709,368	20,679,118
Current liabilities	685,324	340,343
Intercompany accounts	1,882,373	1,446,952
Deferred income taxes	2,047,103	2,120,676
Long-term debt	11,599,978	12,441,112
Other long-term obligations	37,287	98,856
Total liabilities	16,252,065	16,447,939
MGM Resorts stockholders' equity	4,457,303	4,231,179
Total stockholders' equity	4,457,303	4,231,179
Total liabilities and stockholders' equity	20,709,368	20,679,118
Guarantor Subsidiaries [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Current assets	891,917	903,537
Property and equipment, net	12,467,651	12,552,828
Investments in subsidiaries	3,843,505	4,037,168
Investments in and advances to unconsolidated affiliates	1,388,087	1,367,071
Intercompany accounts	1,932,342	'
Other non-current assets	545,733	542,259
Total assets	21,069,235	19,402,863
Current liabilities	961,631	959,118
Intercompany accounts	'	-1,470,305
Long-term debt	4,836	4,836
Other long-term obligations	52,511	41,758
Total liabilities	1,018,978	-464,593
MGM Resorts stockholders' equity	20,050,257	19,867,456
Total stockholders' equity	20,050,257	19,867,456
Total liabilities and stockholders' equity	21,069,235	19,402,863
Non-Guarantor Subsidiaries [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Current assets	917,115	1,322,170
Property and equipment, net	1,658,043	1,514,356
Investments in and advances to unconsolidated affiliates	7,837	7,765
Other non-current assets	7,167,519	7,250,887
Total assets	9,750,514	10,095,178
Current liabilities	913,853	941,431
Intercompany accounts	49,969	23,353
Deferred income taxes	309,895	309,738
Long-term debt	1,001,706	1,001,282
Other long-term obligations	17,143	976
Total liabilities	2,292,566	2,276,780
MGM Resorts stockholders' equity	3,973,723	4,173,954
Noncontrolling interests	3,484,225	3,644,444
Total stockholders' equity	7,457,948	7,818,398
Total liabilities and stockholders' equity	$9,750,514	$10,095,178

Condensed_Consolidating_Financ3

Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Statement of Operations and Comprehensive Income Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net revenues	$2,581,033	$2,481,265	$5,211,431	$4,833,413
Expenses:	'	'	'	'
Casino and hotel operations	1,618,992	1,579,869	3,269,087	3,073,464
General and administrative	327,484	314,324	646,730	618,225
Corporate expense	54,439	52,364	107,790	98,988
Preopening and start-up expenses	9,759	3,506	15,395	5,652
Property transactions, net	33,170	88,131	33,728	96,622
Depreciation and amortization	203,070	218,151	410,725	430,069
Total expenses	2,246,914	2,256,345	4,483,455	4,323,020
Income from unconsolidated affiliates	5,868	6,682	24,644	23,026
Operating income	339,987	231,602	752,620	533,419
Interest expense, net of amounts capitalized	-203,936	-214,500	-413,323	-439,947
Other, net	-14,887	-43,815	-30,044	-67,176
Income (loss) before income taxes	121,164	-26,713	309,253	26,296
Benefit (provision) for income taxes	52,540	-3,865	56,059	-34,296
Net income (loss)	173,704	-30,578	365,312	-8,000
Less: Net income attributable to noncontrolling interests	-68,160	-62,380	-151,608	-78,412
Net income (loss) attributable to MGM Resorts International	105,544	-92,958	213,704	-86,412
Net income (loss)	173,704	-30,578	365,312	-8,000
Other comprehensive income (loss), net of tax:	'	'	'	'
Foreign currency translation adjustment	5,862	6,416	3,102	-6,225
Other	'	'	1,250	115
Other comprehensive income (loss)	5,862	6,416	4,352	-6,110
Comprehensive income (loss)	179,566	-24,162	369,664	-14,110
Less: Comprehensive income attributable to noncontrolling interests	-71,023	-65,470	-153,228	-75,297
Comprehensive income (loss) attributable to MGM Resorts International	108,543	-89,632	216,436	-89,407
Elimination [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net revenues	-621	-466	-1,214	-945
Equity in subsidiaries' earnings	-334,524	-199,369	-734,864	-412,778
Expenses:	'	'	'	'
Casino and hotel operations	-621	-466	-1,214	-945
Total expenses	-621	-466	-1,214	-945
Operating income	-334,524	-199,369	-734,864	-412,778
Income (loss) before income taxes	-334,524	-199,369	-734,864	-412,778
Net income (loss)	-334,524	-199,369	-734,864	-412,778
Net income (loss) attributable to MGM Resorts International	-334,524	-199,369	-734,864	-412,778
Net income (loss)	-334,524	-199,369	-734,864	-412,778
Other comprehensive income (loss), net of tax:	'	'	'	'
Foreign currency translation adjustment	-5,998	-6,652	-2,964	6,220
Other	'	'	-1,250	-115
Other comprehensive income (loss)	-5,998	-6,652	-4,214	6,105
Comprehensive income (loss)	-340,522	-206,021	-739,078	-406,673
Comprehensive income (loss) attributable to MGM Resorts International	-340,522	-206,021	-739,078	-406,673
Parent [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Equity in subsidiaries' earnings	249,078	120,773	556,049	304,196
Expenses:	'	'	'	'
Casino and hotel operations	1,299	1,366	2,553	2,876
General and administrative	1,134	1,037	2,246	2,127
Corporate expense	16,724	14,646	33,463	29,454
Total expenses	19,157	17,049	38,262	34,457
Operating income	229,921	103,724	517,787	269,739
Interest expense, net of amounts capitalized	-196,215	-199,982	-397,112	-408,665
Other, net	16,358	12,595	34,948	27,761
Income (loss) before income taxes	50,064	-83,663	155,623	-111,165
Benefit (provision) for income taxes	55,480	-9,295	58,081	24,753
Net income (loss)	105,544	-92,958	213,704	-86,412
Net income (loss) attributable to MGM Resorts International	105,544	-92,958	213,704	-86,412
Net income (loss)	105,544	-92,958	213,704	-86,412
Other comprehensive income (loss), net of tax:	'	'	'	'
Foreign currency translation adjustment	2,999	3,326	1,482	-3,110
Other	'	'	1,250	115
Other comprehensive income (loss)	2,999	3,326	2,732	-2,995
Comprehensive income (loss)	108,543	-89,632	216,436	-89,407
Comprehensive income (loss) attributable to MGM Resorts International	108,543	-89,632	216,436	-89,407
Guarantor Subsidiaries [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net revenues	1,617,302	1,513,692	3,173,631	2,977,657
Equity in subsidiaries' earnings	85,446	78,596	178,815	108,582
Expenses:	'	'	'	'
Casino and hotel operations	971,928	920,319	1,893,902	1,806,402
General and administrative	272,340	260,928	532,980	512,477
Corporate expense	36,198	30,375	69,784	58,114
Preopening and start-up expenses	1,015	1,248	3,006	1,020
Property transactions, net	33,044	87,980	33,538	96,275
Depreciation and amortization	123,853	135,887	251,928	263,718
Total expenses	1,438,378	1,436,737	2,785,138	2,738,006
Income from unconsolidated affiliates	5,730	5,620	24,453	21,958
Operating income	270,100	161,171	591,761	370,191
Interest expense, net of amounts capitalized	-120	-2,714	-224	-5,699
Other, net	-14,089	-39,034	-28,452	-61,852
Income (loss) before income taxes	255,891	119,423	563,085	302,640
Benefit (provision) for income taxes	-2,108	5,955	-467	7,412
Net income (loss)	253,783	125,378	562,618	310,052
Net income (loss) attributable to MGM Resorts International	253,783	125,378	562,618	310,052
Net income (loss)	253,783	125,378	562,618	310,052
Other comprehensive income (loss), net of tax:	'	'	'	'
Foreign currency translation adjustment	2,999	3,326	1,482	-3,110
Other	'	'	1,250	115
Other comprehensive income (loss)	2,999	3,326	2,732	-2,995
Comprehensive income (loss)	256,782	128,704	565,350	307,057
Comprehensive income (loss) attributable to MGM Resorts International	256,782	128,704	565,350	307,057
Non-Guarantor Subsidiaries [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net revenues	964,352	968,039	2,039,014	1,856,701
Expenses:	'	'	'	'
Casino and hotel operations	646,386	658,650	1,373,846	1,265,131
General and administrative	54,010	52,359	111,504	103,621
Corporate expense	1,517	7,343	4,543	11,420
Preopening and start-up expenses	8,744	2,258	12,389	4,632
Property transactions, net	126	151	190	347
Depreciation and amortization	79,217	82,264	158,797	166,351
Total expenses	790,000	803,025	1,661,269	1,551,502
Income from unconsolidated affiliates	138	1,062	191	1,068
Operating income	174,490	166,076	377,936	306,267
Interest expense, net of amounts capitalized	-7,601	-11,804	-15,987	-25,583
Other, net	-17,156	-17,376	-36,540	-33,085
Income (loss) before income taxes	149,733	136,896	325,409	247,599
Benefit (provision) for income taxes	-832	-525	-1,555	-66,461
Net income (loss)	148,901	136,371	323,854	181,138
Less: Net income attributable to noncontrolling interests	-68,160	-62,380	-151,608	-78,412
Net income (loss) attributable to MGM Resorts International	80,741	73,991	172,246	102,726
Net income (loss)	148,901	136,371	323,854	181,138
Other comprehensive income (loss), net of tax:	'	'	'	'
Foreign currency translation adjustment	5,862	6,416	3,102	-6,225
Other comprehensive income (loss)	5,862	6,416	3,102	-6,225
Comprehensive income (loss)	154,763	142,787	326,956	174,913
Less: Comprehensive income attributable to noncontrolling interests	-71,023	-65,470	-153,228	-75,297
Comprehensive income (loss) attributable to MGM Resorts International	$83,740	$77,317	$173,728	$99,616

Condensed_Consolidating_Financ4

Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Statement of Cash Flows Information (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities	'	'
Net cash provided by (used in) operating activities	$803,624	$730,062
Cash flows from investing activities	'	'
Capital expenditures, net of construction payable	-370,248	-242,878
Dispositions of property and equipment	412	323
Investments in and advances to unconsolidated affiliates	-53,750	-14,400
Distributions from unconsolidated affiliates in excess of earnings	790	'
Investments in treasury securities - maturities longer than 90 days	-93,137	-120,332
Proceeds from treasury securities - maturities longer than 90 days	111,238	135,268
Other	2,535	1,806
Net cash provided by (used in) investing activities	-402,160	-240,213
Cash flows from financing activities	'	'
Net repayments under bank credit facilities - maturities of 90 days or less	-1,737,750	-14,000
Borrowings under bank credit facilities - maturities longer than 90 days	3,451,875	2,793,000
Repayments under bank credit facilities - maturities longer than 90 days	-1,728,125	-2,793,000
Retirement of senior notes	-508,900	-462,234
Debt issuance costs	'	-17,061
Distributions to noncontrolling interest owners	-314,447	-259,016
Other	-2,173	-1,687
Net cash provided by (used in) financing activities	-839,520	-753,998
Effect of exchange rate on cash	-476	-687
Cash and cash equivalents	'	'
Net increase (decrease) for the period	-438,532	-264,836
Balance, beginning of period	1,803,669	1,543,509
Balance, end of period	1,365,137	1,278,673
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 transactions	462,037	'
Net cash provided by (used in) investing activities	437,037	'
Cash flows from financing activities	'	'
Intercompany accounts	-462,037	'
Net cash provided by (used in) financing activities	-462,037	'
Parent [Member]	'	'
Cash flows from operating activities	'	'
Net cash provided by (used in) operating activities	-366,066	-402,258
Cash flows from investing activities	'	'
Investments in and advances to unconsolidated affiliates	-11,700	-12,400
Net cash provided by (used in) investing activities	-11,700	-12,400
Cash flows from financing activities	'	'
Net repayments under bank credit facilities - maturities of 90 days or less	-1,287,750	-14,000
Borrowings under bank credit facilities - maturities longer than 90 days	3,001,875	2,343,000
Repayments under bank credit facilities - maturities longer than 90 days	-1,728,125	-2,343,000
Retirement of senior notes	-508,900	-462,226
Debt issuance costs	'	-17,061
Intercompany accounts	849,275	756,926
Other	-1,696	-1,346
Net cash provided by (used in) financing activities	324,679	262,293
Cash and cash equivalents	'	'
Net increase (decrease) for the period	-53,087	-152,365
Balance, beginning of period	378,660	254,385
Balance, end of period	325,573	102,020
Guarantor Subsidiaries [Member]	'	'
Cash flows from operating activities	'	'
Net cash provided by (used in) operating activities	664,206	565,476
Cash flows from investing activities	'	'
Capital expenditures, net of construction payable	-166,418	-108,574
Dispositions of property and equipment	104	127
Investments in and advances to unconsolidated affiliates	-17,050	-2,000
Distributions from unconsolidated affiliates in excess of earnings	790	'
Investments in treasury securities - maturities longer than 90 days	-93,137	-120,332
Proceeds from treasury securities - maturities longer than 90 days	111,238	135,268
Intercompany transactions	-462,037	'
Other	2,535	1,806
Net cash provided by (used in) investing activities	-623,975	-93,705
Cash flows from financing activities	'	'
Retirement of senior notes	'	-8
Intercompany accounts	-38,418	-488,344
Net cash provided by (used in) financing activities	-38,418	-488,352
Cash and cash equivalents	'	'
Net increase (decrease) for the period	1,813	-16,581
Balance, beginning of period	237,457	226,242
Balance, end of period	239,270	209,661
Non-Guarantor Subsidiaries [Member]	'	'
Cash flows from operating activities	'	'
Net cash provided by (used in) operating activities	480,484	566,844
Cash flows from investing activities	'	'
Capital expenditures, net of construction payable	-203,830	-134,304
Dispositions of property and equipment	308	196
Net cash provided by (used in) investing activities	-203,522	-134,108
Cash flows from financing activities	'	'
Net repayments under bank credit facilities - maturities of 90 days or less	-450,000	'
Borrowings under bank credit facilities - maturities longer than 90 days	450,000	450,000
Repayments under bank credit facilities - maturities longer than 90 days	'	-450,000
Intercompany accounts	-348,820	-268,582
Distributions to noncontrolling interest owners	-314,447	-259,016
Other	-477	-341
Net cash provided by (used in) financing activities	-663,744	-527,939
Effect of exchange rate on cash	-476	-687
Cash and cash equivalents	'	'
Net increase (decrease) for the period	-387,258	-95,890
Balance, beginning of period	1,187,552	1,062,882
Balance, end of period	$800,294	$966,992