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Inventories (Details) - USD ($)
$ in Millions
Apr. 03, 2016
Jan. 03, 2016
Inventories    
Raw materials and supplies $ 147.2 $ 141.6
Work in process 151.7 149.4
Finished goods 47.5 45.8
Total inventories, gross 346.4 336.8
Progress payments (9.3) (12.3)
Reduction to LIFO cost basis (15.1) (15.3)
Total inventories, net $ 322.0 $ 309.2