Leases (Supplement Cash Flow Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jan. 01, 2021
Leases [Abstract]
Operating cash flows from operating leases	$ 35.9	$ 37.0
Right-of-use assets obtained in exchange for Operating lease liabilities:	49.5	29.4
Operating lease right-of-use assets	141.0	128.9
Other current liabilities	35.0	33.8
Operating lease liabilities	121.4	109.2
Total operating lease liabilities	$ 156.4	$ 143.0
Weighted-average discount rate	3.31%	3.86%
Weighted-average remaining lease term	7 years	6 years
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities