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Business Combinations (Details) (Sinclair Knight Merz [Member], USD $)
0 Months Ended 6 Months Ended
Dec. 13, 2013
Mar. 28, 2014
Mar. 29, 2013
Business Acquisition [Line Items]      
Payments to acquire business $ 1,200,000,000    
Enterprise value plus adjustments for cash, debt and other items. 1,100,000,000    
Acquisition-related costs   16,400,000  
Acquired receivables 304,600,000    
Adjustment to pro forma earnings   183,000,000 220,000,000
Pro forma intangible asset amortization   11,900,000 13,300,000
Pro forma interest expense   2,600,000 3,200,000
Loss from settlement related to shareholding plan provisions   24,000,000  
Selling, General and Administrative Expenses [Member]
     
Business Acquisition [Line Items]      
Acquisition-related costs   9,000,000  
Minimum [Member]
     
Business Acquisition [Line Items]      
Useful life of intangibles   3 years  
Maximum [Member]
     
Business Acquisition [Line Items]      
Useful life of intangibles   12 years  
Acquisition-related Costs [Member]
     
Business Acquisition [Line Items]      
Adjustment to pro forma earnings   21,100,000 (22,700,000)
Interest Expense [Member]
     
Business Acquisition [Line Items]      
Adjustment to pro forma earnings   600,000 2,300,000
Intangible Asset Amortization [Member]
     
Business Acquisition [Line Items]      
Adjustment to pro forma earnings   $ 3,500,000 $ 10,400,000