Leases (Maturities of Lease Liabilities) (Details) - USD ($) $ in Millions	Sep. 27, 2019	Jan. 01, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Remainder of fiscal year	$ 55.8
Due in year two	197.3
Due in year three	160.4
Due in year four	140.6
Due in year five	122.0
Due thereafter	460.3
Total operating lease payments	1,136.4
Less: imputed interest	137.4
Total operating lease liabilities	$ 999.0	$ 1,012.0