Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Revenues	$ 2,897.0	$ 2,694.2	$ 2,558.0
Cost of revenues	1,975.9	1,828.2	1,761.4
Selling, general and administrative expenses	420.9	399.1	378.4
Total operating expenses	2,396.8	2,227.3	2,139.8
Operating income	500.3	466.9	418.2
Non-operating expenses, net	31.4	28.0	22.7
Earnings before income taxes	468.9	438.9	395.5
Provision for income taxes	161.4	151.8	132.5
Net earnings	$ 307.5	$ 287.1	$ 263.0
Basic earnings per share (in usd per share)	$ 2.60	$ 2.39	$ 2.20
Diluted earnings per share (in usd per share)	$ 2.53	$ 2.32	$ 2.12
Weighted-average shares outstanding:
Basic (in shares)	118.3	119.9	119.6
Diluted (in shares)	121.6	124.0	124.1