LONG-TERM DEBT (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
LONG-TERM DEBT
Long-term debt	$ 13,690,699,000	$ 13,589,283,000
Senior credit facility term loans, net
LONG-TERM DEBT
Long-term debt	2,784,566,000	2,791,284,000
Long-term debt, principal amount	2,793,000,000	2,800,000,000
Senior credit facility Revolving loans
LONG-TERM DEBT
Long-term debt	110,000,000
MGM Grand Paradise credit facility
LONG-TERM DEBT
Long-term debt	552,601,000	553,531,000
6.75% senior notes, due 2013
LONG-TERM DEBT
Long-term debt	462,226,000	462,226,000
Long-term debt, principal amount	462,200,000	462,200,000
Long-term debt, interest rate (as a percent)	6.75%	6.75%
7.625% senior subordinated debentures, due 2013, net
LONG-TERM DEBT
Long-term debt	150,292,000	150,539,000
Long-term debt, principal amount	150,000,000	150,000,000
Long-term debt, interest rate (as a percent)	7.625%	7.625%
5.875% senior notes, due 2014, net
LONG-TERM DEBT
Long-term debt	508,617,000	508,540,000
Long-term debt, principal amount	508,900,000	508,900,000
Long-term debt, interest rate (as a percent)	5.875%	5.875%
6.625% senior notes, due 2015, net
LONG-TERM DEBT
Long-term debt	876,484,000	876,634,000
Long-term debt, principal amount	875,000,000	875,000,000
Long-term debt, interest rate (as a percent)	6.625%	6.625%
4.25% Convertible Senior Notes due 2015, net
LONG-TERM DEBT
Long-term debt	1,459,636,000	1,460,780,000
Long-term debt, principal amount	1,450,000,000	1,450,000,000
Long-term debt, interest rate (as a percent)	4.25%	4.25%
6.875% senior notes, due 2016
LONG-TERM DEBT
Long-term debt	242,900,000	242,900,000
Long-term debt, principal amount	242,900,000	242,900,000
Long-term debt, interest rate (as a percent)	6.875%	6.875%
7.5% senior notes, due 2016
LONG-TERM DEBT
Long-term debt	732,749,000	732,749,000
Long-term debt, principal amount	732,700,000	732,700,000
Long-term debt, interest rate (as a percent)	7.50%	7.50%
10% senior notes, due 2016, net
LONG-TERM DEBT
Long-term debt	496,320,000	496,110,000
Long-term debt, principal amount	500,000,000	500,000,000
Long-term debt, interest rate (as a percent)	10.00%	10.00%
7.625% senior notes, due 2017
LONG-TERM DEBT
Long-term debt	743,000,000	743,000,000
Long-term debt, principal amount	743,000,000	743,000,000
Long-term debt, interest rate (as a percent)	7.625%	7.625%
11.375% senior notes, due 2018, net
LONG-TERM DEBT
Long-term debt	466,435,000	466,117,000
Long-term debt, principal amount	475,000,000	475,000,000
Long-term debt, interest rate (as a percent)	11.375%	11.375%
8.625% senior notes due 2019
LONG-TERM DEBT
Long-term debt	850,000,000	850,000,000
Long-term debt, principal amount	850,000,000	850,000,000
Long-term debt, interest rate (as a percent)	8.625%	8.625%
6.75% senior notes, due 2020
LONG-TERM DEBT
Long-term debt	1,000,000,000	1,000,000,000
Long-term debt, principal amount	1,000,000,000	1,000,000,000
Long-term debt, interest rate (as a percent)	6.75%	6.75%
6.625% senior notes, due 2021, net
LONG-TERM DEBT
Long-term debt	1,250,000,000	1,250,000,000
Long-term debt, principal amount	1,250,000,000	1,250,000,000
Long-term debt, interest rate (as a percent)	6.625%	6.625%
7.75% senior notes due 2022
LONG-TERM DEBT
Long-term debt	1,000,000,000	1,000,000,000
Long-term debt, principal amount	1,000,000,000	1,000,000,000
Long-term debt, interest rate (as a percent)	7.75%	7.75%
7% debentures, due 2036, net
LONG-TERM DEBT
Long-term debt	572,000	572,000
Long-term debt, principal amount	600,000	600,000
Long-term debt, interest rate (as a percent)	7.00%	7.00%
6.7% debentures, due 2096
LONG-TERM DEBT
Long-term debt	4,265,000	4,265,000
Long-term debt, principal amount	4,300,000	4,300,000
Long-term debt, interest rate (as a percent)	6.70%	6.70%
Other notes
LONG-TERM DEBT
Long-term debt	$ 36,000	$ 36,000