Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	Jul. 01, 2017	Dec. 31, 2016	Jul. 02, 2016
Assets:
Cash Equivalents	$ 1.4	$ 18.9	$ 101.0
Short-Term Investments in Marketable Securities	0.8	35.8	0.5
Restricted Cash	10.7	11.2	12.7
Derivatives	7.7	11.2	16.1
Total Assets	20.6	77.1	130.3
Liabilities:
Derivatives	5.2	4.8	7.5
Deferred Compensation	34.5	32.3	40.5
Total Liabilities at Fair Value	39.7	37.1	48.0
Liabilities Measured at Net Asset Value	11.3	11.6	12.3
Total Liabilities	51.0	48.7	60.3
Fair Value, Inputs, Level 1 [Member]
Assets:
Cash Equivalents	1.4	4.6	101.0
Short-Term Investments in Marketable Securities	0.8	0.8	0.5
Restricted Cash	10.7	11.2	12.7
Derivatives	0.0	0.0	0.0
Total Assets	12.9	16.6	114.2
Liabilities:
Derivatives	0.0	0.0	0.0
Deferred Compensation	4.6	4.2	3.7
Total Liabilities at Fair Value	4.6	4.2	3.7
Fair Value, Inputs, Level 2 [Member]
Assets:
Cash Equivalents	0.0	14.3	0.0
Short-Term Investments in Marketable Securities	0.0	35.0	0.0
Restricted Cash	0.0	0.0	0.0
Derivatives	7.7	11.2	16.1
Total Assets	7.7	60.5	16.1
Liabilities:
Derivatives	5.2	4.8	7.5
Deferred Compensation	29.9	28.1	36.8
Total Liabilities at Fair Value	$ 35.1	$ 32.9	$ 44.3