Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands									1 Months Ended					12 Months Ended
	Mar. 15, 2021	Dec. 02, 2020	May 18, 2020	Feb. 14, 2020	Feb. 13, 2020	Nov. 22, 2019	Mar. 07, 2019	Jan. 29, 2019	Feb. 28, 2022	Mar. 31, 2021	Feb. 29, 2020	Apr. 30, 2019	Jan. 31, 2019	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Feb. 09, 2022	May 31, 2018
Stockholders Equity Note [Line Items]
Operating partnership units, redeemed		24,000	30,000
Cash proceeds for redemption		$ 700,000	$ 700,000												$ 50,828	$ 22,292
Common stock repurchases, value															$ 1,753,509	$ 353,720	$ 1,031,534
Common Stock
Stockholders Equity Note [Line Items]
Common stock repurchases (in shares)															43,088	10,861	35,854
Common stock repurchases, value															$ 430	$ 109	$ 358
Share Repurchase Program | Common Stock
Stockholders Equity Note [Line Items]
Authorized amount of stock repurchase															2,000,000				$ 2,000,000
Repurchase of common stock, remaining amount															$ 1,300,000
Share Repurchase Program Two | Common Stock
Stockholders Equity Note [Line Items]
Authorized amount of stock repurchase											$ 3,000,000
Share Repurchase Program | Common Stock
Stockholders Equity Note [Line Items]
Common stock repurchases (in shares)															43,000	11,000	36,000
Stock repurchased, average price per share															$ 40.70	$ 32.57	$ 28.77
Common stock repurchases, value															$ 1,800,000	$ 354,000	$ 1,000,000
Subsequent Event
Stockholders Equity Note [Line Items]
Dividends declared per share																		$ 0.0025
Subsequent Event | Share Repurchase Program | Common Stock
Stockholders Equity Note [Line Items]
Common stock repurchases (in shares)														15,000
Stock repurchased, average price per share														$ 43.88
Common stock repurchases, value														$ 670,000
MGP BREIT Venture
Stockholders Equity Note [Line Items]
Issuance of operating partnership units				3,000							3,000
Corvex Management LP | Subsequent Event | Share Repurchase Program | Common Stock
Stockholders Equity Note [Line Items]
Common stock repurchases (in shares)									4,500
Stock repurchased, average price per share									$ 45.00
Common stock repurchases, value									$ 202,500
Northfield Park associates LLC
Stockholders Equity Note [Line Items]
Issuance of operating partnership units												9,000
MGM Growth Properties LLC | Class A shares
Stockholders Equity Note [Line Items]
Issuance of operating partnership units						18,000
New issuance of shares	22,000			5,000	13,000	30,000							20,000		3,000		5,000
MGM Growth Properties LLC | Class A shares | Underwriters
Stockholders Equity Note [Line Items]
New issuance of shares						18,000
MGM Growth Properties LLC | Class A shares | Forward Purchasers
Stockholders Equity Note [Line Items]
New issuance of shares						12,000
MGM Growth Properties LLC | Empire City
Stockholders Equity Note [Line Items]
Issuance of operating partnership units								13,000
MGM Growth Properties LLC | Park MGM
Stockholders Equity Note [Line Items]
Issuance of operating partnership units							1,000
MGM Growth Properties LLC | Operating Partnership
Stockholders Equity Note [Line Items]
Partnership interest	42.10%		56.70%	60.30%	61.20%	63.70%	69.80%	74.60%		42.10%	60.60%	68.80%	69.70%			53.00%
Operating partnership units, redeemed		24,000	30,000							37,000
Cash proceeds for redemption		$ 700,000	$ 700,000							$ 1,200,000
Partners Capital Account Units Redeemed For Cash										15,000
Operating Partnership Redemption Units For Class A Offering										22,000
MGM Growth Properties LLC | Operating Partnership | Class A shares
Stockholders Equity Note [Line Items]
Partnership interest															41.60%		67.60%