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Receivables (Details) (USD $)
In Millions, unless otherwise specified
Jun. 29, 2012
Jul. 01, 2011
Receivables    
Accounts receivable $ 618.7 $ 703.4
Unbilled costs on cost-plus contracts 138.5 138.5
Notes receivable due within one year, net 0 6.5
Receivables, gross 757.2 848.4
Less allowances for collection losses (7.0) (11.9)
Receivables $ 750.2 $ 836.5