Fair Value Measurements - Schedule of Fixed Rate Long-term Debt (Details) - USD ($) $ in Millions	Mar. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Public bonds	$ 2,886.1	$ 2,892.5
Public bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Public bonds	2,472.0	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	301.9	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	$ 286.1	$ 292.5