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Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Instrument [Line Items] |  |
Long-term debt, Gross | $ 12,480,586 | $ 11,271,706
Less: Premiums, discounts, and unamortized debt issuance costs, net | (103,902) | (102,802)
Long-term debt | 12,376,684 | 11,168,904
Senior Credit Facility [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt, Gross | 0 | 0
Operating Partnership Senior Credit Facility [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt, Gross | 10,000 | 1,703,750
MGM China Credit Facility [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt, Gross | 770,034 | 667,404
7.75% senior notes, due 2022 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 1,000,000 | 1,000,000
6% senior notes, due 2023 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 1,250,000 | 1,250,000
5.625% Operating Partnership senior notes, due 2024 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 1,050,000 | 1,050,000
5.375% MGM China senior notes, due 2024 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 750,000 | 750,000
6.75% senior notes, due 2025 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 750,000 | 0
5.75% senior notes, due 2025 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 675,000 | 1,000,000
4.625% Operating Partnership senior notes, due 2025 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 800,000 | 0
5.25% MGM China senior notes, due 2025 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 500,000 | 0
5.875% MGM China senior notes, due 2026 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 750,000 | 750,000
4.5% Operating Partnership senior notes, due 2026 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 500,000 | 500,000
4.625% senior notes, due 2026 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 400,000 | 500,000
5.75% Operating Partnership senior notes, due 2027 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 750,000 | 750,000
5.5% senior notes, due 2027 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 675,000 | 1,000,000
4.5% Operating Partnership senior notes, due 2028 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 350,000 | 350,000
4.75% senior notes, due 2028 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 750,000 | 0
3.875% Operating Partnership senior notes, due 2029 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | 750,000 | 0
7% debentures, due 2036 [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes | $ 552 | $ 552

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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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