ACCOUNTS RECEIVABLE AND COSTS AND ACCRUED EARNINGS IN EXCESS OF BILLINGS ON CONTRACTS (DETAILS) (USD $) In Millions, unless otherwise specified	Mar. 30, 2012	Dec. 30, 2011
Accounts receivable and costs and accrued earnings in excess of billings on contracts (Textuals) [Abstract]
Receivables with contractual terms in excess of one year	$ 276.9	$ 257.0
Schedule of accounts receivable and costs and accrued earnings in excess of billings on contracts [Line Items]
Total accounts receivable	1,091.2	1,114.7
Total costs and accrued earnings in excess of billing on contracts	1,415.6	1,317.1
US Federal Government [Member]
Schedule of accounts receivable and costs and accrued earnings in excess of billings on contracts [Line Items]
Total accounts receivable	383.8	391.2
Total costs and accrued earnings in excess of billing on contracts	811.2	758.9
Others [Member]
Schedule of accounts receivable and costs and accrued earnings in excess of billings on contracts [Line Items]
Total accounts receivable	707.4	723.5
Total costs and accrued earnings in excess of billing on contracts	$ 604.4	$ 558.2