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Long-Term Debt - Additional Information (Detail) - USD ($) | 1 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Jun. 30, 2021 | Feb. 28, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |  |
Credit facility amount |  | $ 12,677,219,000 |  | $ 12,480,586,000
Fair value of interest rate swaps designated as cash flow hedges recorded as liability |  |  |  | 41,000,000
Fair value of interest rate swaps designated as cash flow hedges recorded as current liability |  |  |  | 1,000,000
Fair value of interest rate swaps designated as cash flow hedges recorded as long-term liability |  | 33,000,000 |  | 40,000,000
Fair value of interest rate swaps not designated as cash flow hedges recorded as liability |  | 38,000,000 |  | 78,000,000
Fair value of interest rate swaps not designated as cash flow hedges recorded as current liability |  | 11,000,000 |  | 31,000,000
Fair value of interest rate swaps not designated as cash flow hedges recorded as long-term liability |  | 27,000,000 |  | 47,000,000
Long-term debt, fair value |  | $ 13,400,000,000 |  | $ 13,200,000,000
4.75% MGM China senior notes, due 2027 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt, maturity year | 2027 | 2027 |  |
Long-term debt, principal amount | $ 750,000,000 |  |  |
Long-term debt, interest rate (as a percent) | 4.75% | 4.75% |  |
Long term debt, issued price percentage | 99.97% |  |  |
Operating Partnership Senior Credit Facility [Member] | Interest Rate Swap [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Notional amount |  | $ 900,000,000 |  |
Operating Partnership Senior Credit Facility [Member] | Interest Rate Swap [Member] | Cash Flow Hedges [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Notional amount |  | $ 700,000,000 |  |
Weighted Average fixed interest rate |  | 1.783% |  |
Revolving Credit Facility [Member] | Operating Partnership Senior Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility drawn |  | $ 0 |  |
Credit facility amount |  | 1,350,000,000 |  |
Unsecured Revolving Credit Facility [Member | MGM China First Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility |  | 1,250,000,000 |  |
Unsecured Revolving Credit Facility [Member | MGM China Second Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility |  | 500,000,000 |  |
Line of credit facility drawn |  | 0 |  |
Line of credit facility, current borrowing capacity |  | 400,000,000 |  |
Term Loan [Member] | MGM China First Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility drawn |  | $ 227,000,000 |  |
Debt instrument, weighted average interest rate |  | 2.84% |  |
Senior Credit Facility [Member] | Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility |  | $ 1,500,000,000 |  |
Line of credit facility drawn |  | $ 0 |  |
Senior Credit Facility [Member] | Revolving Credit Facility [Member] | Maximum [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Increase the liquidity level including unrestricted cash, cash equivalents |  |  | $ 1,000,000,000.0 |

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- Definition Fair value of interest rate swaps designated as cash flow hedges recorded as long term liability. + References No definition available. + Details
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- Definition Amount of cash eligible for distribution to members or limited partners of limited liability company (LLC) or limited partnership (LP), subject to reserves to be maintained as defined in operating or partnership agreement, or in a credit facility agreement. + References No definition available. + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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