Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	Sep. 29, 2018	Dec. 31, 2017	Sep. 30, 2017
Assets:
Cash Equivalents		$ 34.4	$ 34.4
Short-Term Investments in Marketable Securities	$ 0.8	0.8	0.8
Restricted Cash	9.5	9.4	10.7
Derivatives	5.9	6.0	7.2
Total Assets	16.2	50.6	53.1
Liabilities:
Derivatives	5.7	7.7	13.1
Deferred Compensation	35.1	34.1	32.4
Total Liabilities at Fair Value	40.8	41.8	45.5
Liabilities Measured at Net Asset Value	11.0	11.8	11.2
Total Liabilities	51.8	53.6	56.7
Level 1 [Member]
Assets:
Cash Equivalents		34.4	0.4
Short-Term Investments in Marketable Securities	0.8	0.8	0.8
Restricted Cash	9.5	9.4	10.7
Derivatives	0.0	0.0	0.0
Total Assets	10.3	44.6	11.9
Liabilities:
Derivatives	0.0	0.0	0.0
Deferred Compensation	4.2	4.0	4.0
Total Liabilities at Fair Value	4.2	4.0	4.0
Level 2 [Member]
Assets:
Cash Equivalents		0.0	34.0
Short-Term Investments in Marketable Securities	0.0	0.0	0.0
Restricted Cash	0.0	0.0	0.0
Derivatives	5.9	6.0	7.2
Total Assets	5.9	6.0	41.2
Liabilities:
Derivatives	5.7	7.7	13.1
Deferred Compensation	30.9	30.1	28.4
Total Liabilities at Fair Value	$ 36.6	$ 37.8	$ 41.5