Indebtedness (Details) - USD ($)		12 Months Ended
	Dec. 19, 2017	Dec. 31, 2017	Dec. 31, 2016
Debt
Balance at the beginning of the period		$ 356,200,000
Borrowings		517,300,000
Repayments		(518,600,000)
Other		1,900,000
Balance at the end of the period		356,800,000
Less: short-term debt		7,000,000	$ 14,800,000
Less: current maturities of long-term debt		500,000	17,900,000
Total long-term debt		349,300,000	323,500,000
Unamortized debt issuance costs		2,300,000	1,600,000
Maturities of long-term debt payable
2017		500,000
2018		18,000,000
2019		18,000,000
2020		17,900,000
2021		297,700,000
Trade receivables financing arrangement
Debt
Balance at the beginning of the period		0
Borrowings		74,000,000
Repayments		(74,000,000)
Other		0
Balance at the end of the period		0
Maximum borrowing capacity under financing arrangement		50,000,000
Available borrowing capacity		33,300,000
Other indebtedness
Debt
Balance at the beginning of the period		16,600,000
Borrowings		38,700,000
Repayments		(48,800,000)
Other		2,600,000
Balance at the end of the period		9,100,000
Capital lease obligations		2,100,000	1,700,000
Purchase card programs		$ 2,800,000	3,900,000
Term loan
Debt
Initial principal amount of the term loan to be repaid annually in quarterly installments (as a percent)		1.25%
Senior credit facility | New Term Loan
Debt
Maximum borrowing capacity under financing arrangement	$ 350,000,000.0
Senior credit facility | Term loan
Debt
Repayments	(328,100,000.0)
Revolving loans | Revolving loans
Debt
Balance at the beginning of the period		$ 0
Borrowings		54,600,000
Repayments		(54,600,000)
Other		0
Balance at the end of the period		0
Term loans | Term loans
Debt
Balance at the beginning of the period		339,600,000
Borrowings		350,000,000
Repayments		(341,200,000)
Other		(700,000)
Balance at the end of the period		347,700,000
Foreign line of credit
Debt
Maximum borrowing capacity under financing arrangement	$ 150,000,000.0
Available borrowing capacity		16,900,000
Foreign line of credit | Other indebtedness | South Africa
Debt
Foreign line of credit		0	10,200,000
Foreign line of credit | Other indebtedness | China
Debt
Foreign line of credit		$ 4,100,000	$ 0