Fair Value Measurements - Schedule of Fixed Rate Long-term Debt (Details) - USD ($) $ in Millions	Sep. 28, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Public bonds	$ 2,747.7	$ 2,892.5
Public bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Public bonds	2,604.1	2,316.6
Retail Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Retail bond and private placement note	163.4	307.9
Reported Value Measurement | Public bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Public bonds	2,600.0	2,600.0
Reported Value Measurement | Retail Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Retail bond and private placement note	$ 147.7	$ 292.5