Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2018
Income Taxes [Abstract]
U.S. corporate income tax rate			21.00%	35.00%
Mandatory repatriation tax payable period	8 years
Repatriation tax liability	$ 6.2				$ 73.1
Tax benefit for reducing deferred tax liability		$ 206.7
Income tax expense for one-time deemed mandatory repatriation		$ 78.7
Provisional tax	$ 0.0