Fair Value Measurements Narrative (Details) - USD ($) $ in Millions	Mar. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation Liability, Classified, Noncurrent	$ 20.3	$ 20.9
Long-term borrowings, carrying value	3,996.9	4,056.2
Long-term borrowings, fair value	3,932.9	4,051.8
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation Liability, Classified, Noncurrent	0.0	0.0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation Liability, Classified, Noncurrent	20.3	20.9
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation Liability, Classified, Noncurrent	$ 0.0	$ 0.0