Debt - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 02, 2020	Dec. 31, 2019	Dec. 31, 2018	Nov. 01, 2018
Debt Instrument [Line Items]
Letters of credit outstanding expiring in current fiscal year		$ 42.5
Revolving credit facility | Line of credit
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity				$ 400.0
Line of credit commitment fee percentage		0.20%
Revolving credit facility		$ 100.0	$ 180.0
Credit facility, remaining borrowing capacity		257.5
Unamortized debt issuance costs		1.2
Letter of credit | Line of credit
Debt Instrument [Line Items]
Letters of credit outstanding		42.5
Interest rate hedges | Designated as hedging instrument
Debt Instrument [Line Items]
Derivative, notional amount			$ 100.0
Derivative fixed interest rate			2.71%
Derivative liability		$ 4.3
LIBOR | Revolving credit facility | Line of credit
Debt Instrument [Line Items]
Credit facility, margin on LIBOR interest rate		1.25%
Subsequent event | Revolving credit facility | Line of credit
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 500.0
Subsequent event | Revolving credit facility | Long-term debt
Debt Instrument [Line Items]
Line of credit commitment fee percentage	0.25%
Term-loan facility	$ 150.0
Subsequent event | LIBOR | Revolving credit facility | Long-term debt
Debt Instrument [Line Items]
Credit facility, margin on LIBOR interest rate	1.50%
Minimum | Revolving credit facility | Line of credit
Debt Instrument [Line Items]
Credit facility, margin on LIBOR interest rate		1.25%
Line of credit commitment fee percentage		0.20%
Maximum | Revolving credit facility | Line of credit
Debt Instrument [Line Items]
Credit facility, margin on LIBOR interest rate		2.00%
Line of credit commitment fee percentage		0.35%