Condensed Consolidated Statements of Comprehensive Income (Unaudited) Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Unrealized loss on derivatives designated and qualified as cash flow hedges, Tax benefit	$ 0.2	$ 0.1	$ 0.5	$ 0.4
Reclassification of unrealized loss on expired derivatives designated and qualified as cash flow hedges, Tax benefit	0.3	0.2	0.5	0.2
Unrecognized net pension and other postretirement benefit loss, Tax benefit	0.3	0.1	1.0	0.5
Reclassification of net pension and other postretirement benefit loss, Tax benefit	0.2	1.4	0.4	2.8
Foreign currency translation adjustments, Tax expense	$ 0.7	$ 0.4	$ 2.1	$ 1.5