Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues
Revenues	$ 2,267,962	$ 289,809	$ 3,915,709	$ 2,542,626
Expenses
General and administrative	590,209	473,564	1,136,616	1,047,870
Corporate expense	96,870	142,578	174,907	286,386
Preopening and start-up expenses	90	(82)	95	40
Property transactions, net	(28,906)	26,349	(2,835)	81,324
Gain on REIT transactions, net	0	0	0	(1,491,945)
Depreciation and amortization	283,625	299,206	574,176	617,496
Total expenses	2,087,540	1,315,985	3,956,398	2,353,705
Income (loss) from unconsolidated affiliates	83,338	(8,353)	57,759	27,395
Operating income (loss)	263,760	(1,034,529)	17,070	216,316
Non-operating income (expense)
Interest expense, net of amounts capitalized	(202,772)	(156,756)	(398,067)	(313,893)
Non-operating items from unconsolidated affiliates	(23,216)	(23,761)	(44,052)	(56,382)
Other, net	87,358	8,321	119,543	(115,943)
Total non-operating income (expense)	(138,630)	(172,196)	(322,576)	(486,218)
Income (loss) before income taxes	125,130	(1,206,725)	(305,506)	(269,902)
Benefit (provision) for income taxes	(34,826)	270,238	59,872	7,934
Net income (loss)	90,304	(936,487)	(245,634)	(261,968)
Less: Net loss attributable to noncontrolling interests	14,449	79,230	18,558	211,580
Net income (loss) attributable to MGM Resorts International	$ 104,753	$ (857,257)	$ (227,076)	$ (50,388)
Earnings (loss) per share
Basic	$ 0.14	$ (1.67)	$ (0.56)	$ (0.02)
Diluted	$ 0.14	$ (1.67)	$ (0.56)	$ (0.02)
Weighted average common shares outstanding
Basic	489,459	493,456	491,785	494,434
Diluted	495,302	493,456	491,785	494,434
Casino [Member]
Revenues
Revenues	$ 1,336,124	$ 163,649	$ 2,434,757	$ 1,217,675
Expenses
Expenses	616,903	200,393	1,168,808	829,063
Rooms [Member]
Revenues
Revenues	365,028	31,623	563,447	465,574
Expenses
Expenses	137,287	41,251	241,500	213,860
Food and Beverage [Member]
Revenues
Revenues	302,666	29,771	460,078	426,480
Expenses
Expenses	214,159	60,306	349,386	399,942
Entertainment, Retail and Other [Member]
Revenues
Revenues	189,011	48,569	324,233	318,514
Expenses
Expenses	102,170	56,223	180,551	255,286
Reimbursed Costs [Member]
Revenues
Revenues	75,133	16,197	133,194	114,383
Expenses
Expenses	$ 75,133	$ 16,197	$ 133,194	$ 114,383

Corporate income expense.

No definition available.

Name:	mgm_CorporateIncomeExpense
Namespace Prefix:	mgm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This item represents the entity's proportionate share for the period of the operating income (loss) of its investees (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied, excluding pre-opening expenses. Such amount typically reflects adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment.

+ References

No definition available.