Quarterly Financial Information (Summary Of Quarterly Financial Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2010		Sep. 30, 2010		Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2010
Revenue	$ 302,526	[1],[2]	$ 278,044	[1],[2]	$ 270,403	[1],[2]	$ 256,558	[1],[2]	$ 274,135	[1],[2]	$ 253,193	[1],[2]	$ 247,117	[1],[2]	$ 233,414	[1],[2]	$ 1,107,531	[3]	$ 1,007,859	[3]	$ 914,319	[3]
Gross margin	165,338	[1],[2]	152,535	[1],[2]	152,321	[1],[2]	144,416	[1],[2]	154,900	[1],[2]	141,378	[1],[2]	137,370	[1],[2]	126,420	[1],[2]	614,610		560,069		501,481
Income from operations	70,894	[1],[2]	55,947	[1],[2]	54,245	[1],[2]	53,435	[1],[2]	65,033	[1],[2]	51,906	[1],[2]	46,681	[1],[2]	46,840	[1],[2]	234,520		210,459		167,973
Net income attributable to MICROS Systems, Inc.	$ 48,218	[1],[2]	$ 43,247	[1],[2]	$ 38,285	[1],[2]	$ 37,232	[1],[2]	$ 41,536	[1],[2]	$ 38,579	[1],[2]	$ 32,328	[1],[2]	$ 31,617	[1],[2]	$ 166,983		$ 144,059		$ 114,353
Income from operations per common share: Basic	$ 0.88	[1],[2]	$ 0.70	[1],[2]	$ 0.68	[1],[2]	$ 0.66	[1],[2]	$ 0.80	[1],[2]	$ 0.64	[1],[2]	$ 0.58	[1],[2]	$ 0.58	[1],[2]
Income from operations per common share: Diluted	$ 0.86	[1],[2]	$ 0.68	[1],[2]	$ 0.66	[1],[2]	$ 0.65	[1],[2]	$ 0.78	[1],[2]	$ 0.63	[1],[2]	$ 0.56	[1],[2]	$ 0.57	[1],[2]
Net income per share attributable to MICROS Systems, Inc. common shareholders: Basic	$ 0.60	[1],[2]	$ 0.54	[1],[2]	$ 0.48	[1],[2]	$ 0.46	[1],[2]	$ 0.51	[1],[2]	$ 0.48	[1],[2]	$ 0.40	[1],[2]	$ 0.39	[1],[2]	$ 2.08		$ 1.78		$ 1.44
Net income per share attributable to MICROS Systems, Inc. common shareholders: Diluted	$ 0.59	[1],[2]	$ 0.53	[1],[2]	$ 0.47	[1],[2]	$ 0.45	[1],[2]	$ 0.50	[1],[2]	$ 0.47	[1],[2]	$ 0.39	[1],[2]	$ 0.39	[1],[2]	$ 2.03		$ 1.74		$ 1.41
Maximum [Member]
Stock Prices	$ 58.49	[1],[2]	$ 55.76	[1],[2]	$ 52.74	[1],[2]	$ 52.24	[1],[2]	$ 53.36	[1],[2]	$ 50.00	[1],[2]	$ 46.78	[1],[2]	$ 43.28	[1],[2]
Minimum [Member]
Stock Prices	$ 48.11	[1],[2]	$ 46.63	[1],[2]	$ 41.11	[1],[2]	$ 38.38	[1],[2]	$ 46.02	[1],[2]	$ 42.76	[1],[2]	$ 41.79	[1],[2]	$ 30.96	[1],[2]

[1] Fiscal years ended June 30, 2012 and 2011 include approximately $16.5 million ($11.3 million, net of tax, or $0.14 per diluted share) and approximately $12.4 million ($8.0 million, net of tax, or $0.10 per diluted share), respectively, in non-cash share-based compensation expenses. See Note 3 "Share-based Compensation." Fiscal years 2012 and 2011 also include other-than-temporary impairment losses of approximately $4.0 million and $4.3 million, respectively, for long-term investments. See Note 2 "Financial Instruments and Fair Value Measurements."

[2] The sum of quarterly amounts does not equal the sum of as reported amounts for the respective fiscal years due to rounding differences.

[3] Amounts based on the location of the selling entity.