Summary Of Significant Accounting Policies (Schedule Of Assumptions For Fair Value Of Stock Options And Purchase Rights Granted) (Details) (USD $)	12 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Maximum [Member] \| Stock Options [Member]
Expected volatility	32.00%	40.00%	38.00%
Maximum [Member] \| ESPP Purchase Rights [Member]
Expected volatility	29.00%	55.00%	55.00%
Minimum [Member] \| Stock Options [Member]
Expected volatility	31.00%	32.00%	27.00%
Minimum [Member] \| ESPP Purchase Rights [Member]
Expected volatility	24.00%	23.00%	33.00%
Stock Options [Member]
Weighted average grant date fair value	10.30	8.03	5.29
Weighted average risk-free interest rate	1.30%	2.20%	1.90%
Expected option life, years	5.3	5.0	4.6
ESPP Purchase Rights [Member]
Weighted average risk-free interest rate	0.90%	0.20%	1.30%
Expected option life, years	0.5	0.5	0.5

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

+ References+ Details

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References+ Details