INDEBTEDNESS - Senior Credit Facilities (Details)	Jun. 27, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018
Senior Credit Facilities
Line of Credit Facility [Line Items]
Debt covenant, maintained interest coverage ratio	3.00
Consolidated quarterly leverage ratio	4.00
Secured debt
Line of Credit Facility [Line Items]
Aggregate principal amount (up to)	$ 750,000,000.0
Secured debt | Senior Credit Facilities
Line of Credit Facility [Line Items]
Ratio of indebtedness to net capital	2.75
Proceeds reinvestment period	360 days
Required reinvestment period	180 days
Security interest in capital stock of domestic subsidiaries	100.00%
Percentage of capital stock of first-tier foreign subsidiaries	65.00%
Consolidated Leverage Ratio limitations on ability to repurchase capital stock and pay cash dividends	2.50
Capital stock repurchase and dividend declaration amount (equal to or less than)	$ 100,000,000.0
Additional amount for stock repurchase and dividend declarations	$ 300,000,000.0
Capital stock repurchase and dividend declaration, percentage of cumulative Consolidated Net Income	50.00%
Capital stock repurchase and dividend declaration, deficit of Consolidated Net Income	100.00%
Available borrowing capacity		$ 494,900,000
Guarantor obligations, current carrying value		$ 9,600,000
Weighted-average interest rate of outstanding borrowings		3.10%	4.30%
Consolidated leverage ratio		3.75
Secured debt | Senior Credit Facilities | Federal funds effective rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Secured debt | Senior Credit Facilities | One-Month LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Secured debt | Senior Credit Facilities | Maximum
Line of Credit Facility [Line Items]
Allowance for additional commitments (up to)	$ 275,000,000.0
Secured debt | Term loan
Line of Credit Facility [Line Items]
Aggregate principal amount	100,000,000.0
Secured debt | United States revolving loan facility
Line of Credit Facility [Line Items]
Aggregate principal amount (up to)	$ 200,000,000.0
Secured debt | Financial Letter of Credit Fee
Line of Credit Facility [Line Items]
Fronting fee	0.125%
Outstanding letters of credit issued under revolving credit and foreign credit instrument facilities		$ 5,100,000
Secured debt | Global Revolving Commitment Fee
Line of Credit Facility [Line Items]
Aggregate principal amount (up to)	$ 300,000,000.0
Secured debt | Participation foreign line of credit
Line of Credit Facility [Line Items]
Available borrowing capacity		69,600,000
Outstanding letters of credit issued under revolving credit and foreign credit instrument facilities		$ 80,400,000
Secured debt | FCI Commitment Fee
Line of Credit Facility [Line Items]
Aggregate principal amount (up to)	$ 150,000,000.0