CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Pension and post-retirement benefits, tax	$ (2.2)	$ (2.5)	$ (6.4)	$ (7.7)
Net gain on derivative instruments, tax	(12.3)	(1.1)	(15.9)	(4.6)
Unrealized gain on marketable securities, tax	$ 0	$ (0.2)	$ 0	$ (0.2)