Completed Acquisitions Purchase Price (Details) (USD $) In Millions, unless otherwise specified	Sep. 29, 2012	Sep. 13, 2012 One Lambda [Member]	May 01, 2012 Doe & Ingalls [Member]	Sep. 29, 2012 Other Acquisitions [Member]
Purchase Price
Cash paid	$ 1,069.0	$ 878.8	$ 174.8	$ 15.4
Purchase price payable	6.7	6.7
Fair value of contingent consideration	15.8	12.9	1.5	1.4
Cash acquired	(1.2)	(1.2)
Total Purchase Price	$ 1,090.3	$ 897.2	$ 176.3	$ 16.8