Quarterly Financial Information (Summary Of Quarterly Financial Information) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended																12 Months Ended
	Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2010		Sep. 30, 2010		Jun. 30, 2010		Mar. 31, 2010		Dec. 31, 2009		Sep. 30, 2009		Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2009
Revenue	$ 274,135	[1],[2]	$ 253,193	[1],[2]	$ 247,117	[1],[2]	$ 233,414	[1],[2]	$ 248,217	[1],[2]	$ 229,054	[1],[2]	$ 225,647	[1],[2]	$ 211,401	[1],[2]	$ 1,007,859	[3]	$ 914,319	[3]	$ 907,725	[3]
Gross margin	154,900	[1],[2]	141,378	[1],[2]	137,370	[1],[2]	126,420	[1],[2]	136,366	[1],[2]	124,310	[1],[2]	124,979	[1],[2]	115,826	[1],[2]	560,069		501,481		482,239
Income from operations	65,033	[1],[2]	51,906	[1],[2]	46,681	[1],[2]	46,840	[1],[2]	51,659	[1],[2]	40,869	[1],[2]	39,598	[1],[2]	35,847	[1],[2]	210,459		167,973		140,835
Net income attributable to MICROS Systems, Inc.	$ 41,536	[1],[2]	$ 38,579	[1],[2]	$ 32,328	[1],[2]	$ 31,617	[1],[2]	$ 33,880	[1],[2]	$ 30,198	[1],[2]	$ 26,130	[1],[2]	$ 24,147	[1],[2]	$ 144,059		$ 114,353		$ 96,292
Basic	$ 0.80	[1],[2]	$ 0.64	[1],[2]	$ 0.58	[1],[2]	$ 0.58	[1],[2]	$ 0.64	[1],[2]	$ 0.51	[1],[2]	$ 0.50	[1],[2]	$ 0.45	[1],[2]
Diluted	$ 0.78	[1],[2]	$ 0.63	[1],[2]	$ 0.56	[1],[2]	$ 0.57	[1],[2]	$ 0.63	[1],[2]	$ 0.50	[1],[2]	$ 0.49	[1],[2]	$ 0.44	[1],[2]
Basic	$ 0.51	[1],[2]	$ 0.48	[1],[2]	$ 0.40	[1],[2]	$ 0.39	[1],[2]	$ 0.42	[1],[2]	$ 0.38	[1],[2]	$ 0.33	[1],[2]	$ 0.30	[1],[2]	$ 1.78		$ 1.44		$ 1.19
Diluted	$ 0.50	[1],[2]	$ 0.47	[1],[2]	$ 0.39	[1],[2]	$ 0.39	[1],[2]	$ 0.42	[1],[2]	$ 0.37	[1],[2]	$ 0.32	[1],[2]	$ 0.30	[1],[2]	$ 1.74		$ 1.41		$ 1.17
Maximum [Member]
Stock Prices	$ 53.36	[1],[2]	$ 50.00	[1],[2]	$ 46.78	[1],[2]	$ 43.28	[1],[2]	$ 38.16	[1],[2]	$ 33.50	[1],[2]	$ 32.43	[1],[2]	$ 31.11	[1],[2]	$ 53.36	[1],[2]	$ 38.16	[1],[2]
Minimum [Member]
Stock Prices	$ 46.02	[1],[2]	$ 42.76	[1],[2]	$ 41.79	[1],[2]	$ 30.96	[1],[2]	$ 31.26	[1],[2]	$ 26.17	[1],[2]	$ 25.68	[1],[2]	$ 22.79	[1],[2]	$ 46.02	[1],[2]	$ 31.26	[1],[2]

[1] Fiscal years ended June 30, 2011 and 2010 include approximately $12.4 million ($8.0 million, net of tax, or $0.10 per diluted share) and approximately $12.4 million ($8.1 million, net of tax, or $0.10 per diluted share), respectively, in non-cash share-based compensation expenses. See Note 3 "Share-based Compensation." The fiscal year 2011 and 2010 also includes other-than-temporary impairment losses of approximately $4.3 million and $4.8 million, respectively, for long-term investments. See Note 2 "Financial Instruments and Fair Value Measurement."

[2] 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.