Leases (Maturities of Lease Liabilities) (Details) - USD ($) $ in Millions	Mar. 29, 2019	Jan. 01, 2019
Operating Lease Liabilities, Payments Due [Abstract]
Remainder of fiscal year	$ 163.3
Due in year two	183.5
Due in year three	149.0
Due in year four	125.8
Due in year five	109.7
Due thereafter	395.3
Total operating lease payments	1,126.6
Less: imputed interest	140.5
Total operating lease liabilities	$ 986.1	$ 1,012.0