Share-Based Compensation (Non-Cash Share-Based Compensation Expense) (Details) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total non-cash share-based compensation expense	$ 3,768,000	$ 2,561,000	$ 12,549,000	$ 9,521,000
Income tax benefit	(1,441,000)	(802,000)	(4,344,000)	(3,457,000)
Total non-cash share-based compensation expense, net of tax benefit	2,327,000	1,759,000	8,205,000	6,064,000
Impact on diluted net income per share attributable to MICROS Systems, Inc. common shareholders	$ 0.03	$ 0.02	$ 0.10	$ 0.07
Non-cash share-based compensation expense, capitalized			0	0
Non-cash share-based compensation related to non-vested awards	27,400,000		27,400,000
Weighted-average period (in years)			2.0
Selling, General And Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total non-cash share-based compensation expense	3,446,000	2,419,000	11,528,000	9,066,000
Research And Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total non-cash share-based compensation expense	264,000	117,000	878,000	368,000
Cost Of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total non-cash share-based compensation expense	$ 58,000	$ 25,000	$ 143,000	$ 87,000