Condensed Consolidated Statements Of Earnings (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Condensed Consolidated Statements Of Earnings [Abstract]
Revenues	$ 479.8	$ 442.3	$ 956.2	$ 863.7
Cost of revenues	382.6	356.6	765.4	693.2
Selling, general and administrative expenses	73.5	66.9	138.2	128.4
Other expenses, net	13.1	2.3	15.8	4.7
Total expenses	469.2	425.8	919.4	826.3
Earnings from continuing operations before income taxes	10.6	16.5	36.8	37.4
Provision for income taxes	3.8	5.9	13.3	13.5
Net earnings from continuing operations	6.8	10.6	23.5	23.9
Loss from discontinued operations, net of tax benefit		(0.2)		(0.2)
Net earnings	$ 6.8	$ 10.4	$ 23.5	$ 23.7
Earnings per share:
Basic earnings per share from continuing operations	$ 0.05	$ 0.08	$ 0.19	$ 0.19
Basic loss per share from discontinued operations
Basic earnings per share	$ 0.05	$ 0.08	$ 0.19	$ 0.19
Diluted earnings per share from continuing operations	$ 0.05	$ 0.08	$ 0.19	$ 0.18
Diluted loss per share from discontinued operations
Diluted earnings per share	$ 0.05	$ 0.08	$ 0.19	$ 0.18
Weighted-average shares outstanding:
Basic	123.7	125.0	123.7	125.8
Diluted	127.2	128.5	126.9	129.0
Dividends declared per common share	$ 0.16	$ 0.15	$ 0.32	$ 0.30