XML 66 R48.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Basis of Presentation and Significant Accounting Policies - Schedule of Contract and Contract - related Liabilities (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Outstanding Chip Liability |  |
Contract And Contract Related Liabilities [Line Items] |  |
Balance at January 1 | $ 212,671 | $ 314,570
Balance at December 31 | 176,219 | 212,671
Increase / (decrease) | (36,452) | (101,899)
Loyalty Program |  |
Contract And Contract Related Liabilities [Line Items] |  |
Balance at January 1 | 139,756 | 126,966
Balance at December 31 | 144,465 | 139,756
Increase / (decrease) | 4,709 | 12,790
Customer Advances and Other |  |
Contract And Contract Related Liabilities [Line Items] |  |
Balance at January 1 | 382,287 | 481,095
Balance at December 31 | 640,001 | 382,287
Increase / (decrease) | $ 257,714 | $ (98,808)

X
- Definition Change in contract and contract related liabilities. + References No definition available. + Details
Name: | mgm_ChangeInContractAndContractRelatedLiabilities
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Contract and contract related liabilities. + References No definition available. + Details
Name: | mgm_ContractAndContractRelatedLiabilitiesLineItems
Namespace Prefix: | mgm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 + Details
Name: | us-gaap_ContractWithCustomerLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_ProductOrServiceAxis=mgm_OutstandingChipLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mgm_LoyaltyProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mgm_CustomerAdvancesAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |