Accounting Policies (Inventories) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Inventory [Line Items]
Raw Material and Work in Process	47.00%	45.00%
Finished Goods and Purchased Parts	53.00%	55.00%
Percentage of LIFO Inventory	52.00%	55.00%
FIFO LIFO valuation difference	$ 46.0	$ 43.7