Fair Value Measurements (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions	Jun. 29, 2019	Dec. 31, 2018	Jun. 30, 2018
Assets:
Cash Equivalents	$ 150.2
Short-Term Investments in Marketable Securities	0.8	$ 0.8	$ 0.8
Restricted Cash	11.6	9.0	9.4
Derivatives	7.3	7.6	7.6
Total Assets	169.9	17.4	17.8
Liabilities:
Derivatives	2.2	2.2	6.0
Deferred Compensation	28.4	24.2	30.7
Total Liabilities at Fair Value	30.6	26.4	36.7
Liabilities Measured at Net Asset Value	11.5	10.2	10.3
Total Liabilities	42.1	36.6	47.0
Level 1 [Member]
Assets:
Cash Equivalents	150.2
Short-Term Investments in Marketable Securities	0.8	0.8	0.8
Restricted Cash	11.6	9.0	9.4
Derivatives	0.0	0.0	0.0
Total Assets	162.6	9.8	10.2
Liabilities:
Derivatives	0.0	0.0	0.0
Deferred Compensation	2.7	3.5	3.9
Total Liabilities at Fair Value	2.7	3.5	3.9
Level 2 [Member]
Assets:
Cash Equivalents	0.0
Short-Term Investments in Marketable Securities	0.0	0.0	0.0
Restricted Cash	0.0	0.0	0.0
Derivatives	7.3	7.6	7.6
Total Assets	7.3	7.6	7.6
Liabilities:
Derivatives	2.2	2.2	6.0
Deferred Compensation	25.7	20.7	26.8
Total Liabilities at Fair Value	$ 27.9	$ 22.9	$ 32.8