Condensed Consolidated Statements of Earnings (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Revenues	$ 493.2	$ 479.8	$ 989.0	$ 956.2
Cost of revenues	387.6	382.6	777.6	765.4
Selling, general and administrative expenses	77.2	73.5	150.1	138.2
Impairment charge		9.7		9.7
Other expenses, net	3.7	3.4	8.0	6.1
Total expenses	468.5	469.2	935.7	919.4
Earnings from continuing operations before income taxes	24.7	10.6	53.3	36.8
Provision for income taxes	8.9	3.8	19.2	13.3
Net earnings from continuing operations	15.8	6.8	34.1	23.5
Loss from discontinued operations, net of tax benefit
Net earnings	$ 15.8	$ 6.8	$ 34.1	$ 23.5
Basic earnings per share:
Basic earnings per share from continuing operations	$ 0.13	$ 0.05	$ 0.28	$ 0.19
Basic loss per share from discontinued operations
Basic earnings per share	$ 0.13	$ 0.05	$ 0.28	$ 0.19
Diluted earnings per share:
Diluted earnings per share from continuing operations	$ 0.13	$ 0.05	$ 0.27	$ 0.19
Diluted loss per share from discontinued operations
Diluted earnings per share	$ 0.13	$ 0.05	$ 0.27	$ 0.19
Weighted-average shares outstanding:
Basic	122.0	123.7	123.0	123.7
Diluted	125.5	127.2	126.3	126.9
Dividends declared per common share	$ 0.18	$ 0.16	$ 0.36	$ 0.32