Debt - Additional Information (Detail) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 30, 2012 USD ($)	Mar. 31, 2013 USD ($)	Mar. 31, 2012	Mar. 31, 2013 USD ($)	Mar. 31, 2012	Oct. 31, 2012 USD ($)	Jun. 30, 2012 USD ($)	Nov. 30, 2012 Maximum USD ($)	Nov. 30, 2012 Minimum	Oct. 31, 2012 Previous Unsecured Line Of Credit USD ($)	Mar. 31, 2013 Line of credit	Jun. 30, 2012 Line of credit	Mar. 31, 2013 Yen denominated line of credit JPY (¥)	Jun. 30, 2012 Yen denominated line of credit	Mar. 31, 2013 Yen denominated line of credit Maximum	Mar. 31, 2013 Yen denominated line of credit Minimum	Mar. 31, 2013 Yen Loan JPY (¥)
Debt [Line Items]
Credit facility	$ 140					$ 80				$ 50			¥ 500
Credit facility, optional additional borrowing amount								35
Credit facility, expiration date	Nov. 30, 2017
Debt instrument, basis spread on LIBOR								1.75%	0.75%		1.25%	0.625%	0.625%	0.625%	1.50%	0.625%
Debt instrument, interest rate on outstanding borrowings		1.50%		1.50%
Amount borrowed																	500
Debt instrument, month and year of maturity													2016-06
Available credit under lines of credit		23.5		23.5			42.3
Total outstanding letters of credit		$ 1.1		$ 1.1			$ 0.9
Weighted average interest rate of total borrowings		1.50%	1.00%	1.30%	1.00%