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Borrowings - Credit Agreement (Details) - USD ($)		3 Months Ended
	Mar. 01, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2017	Jun. 16, 2017
Debt Instrument [Line Items]
Term maturity date, period	91 days
Revolving maturity date, period	182 days
Outstanding principal amount		$ 2,031,571,000
Overnight Bank Funding Rate
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.50%
Scenario 1
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	2.50%
Interest rate	1.00%
Basis spread on variable rate, stepdown (as a percent)	2.25%
Scenario 1 | Overnight Bank Funding Rate
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	0.50%
Scenario 1 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	1.00%
Scenario 2
Debt Instrument [Line Items]
Interest rate	0.00%
Scenario 2 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	3.50%
Basis spread on variable rate, stepdown (as a percent)	3.25%
Senior Secured Credit Facility Fourth Amendment
Debt Instrument [Line Items]
Outstanding principal amount				$ 1,150,000,000
Term Loan | First Lien Term Loan Facility
Debt Instrument [Line Items]
Aggregate principal amount	$ 1,500,000,000.0
Senior Secured First Lien Term Loan
Debt Instrument [Line Items]
Repayment requirement, minimum amount	$ 400,000,000
Debt amortization, percentage of original aggregate principal amount	1.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 50,000,000.0
Commitment fee (as a percent)	0.50%
Outstanding principal amount		$ 7,000,000	$ 7,000,000
Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Commitment fee stepdown (as a percent)	0.375%
Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Commitment fee stepdown (as a percent)	0.25%
Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 5,000,000.0
Swingline Subfacility
Debt Instrument [Line Items]
Maximum borrowing capacity	5,000,000.0
Senior Secured Second Lien Notes
Debt Instrument [Line Items]
Aggregate principal amount					$ 500,000,000
Interest rate					6.75%
VFH
Debt Instrument [Line Items]
Proceeds from borrowings	404,500,000
VFH | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	50,000,000.0
VFH | Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	5,000,000.0
VFH | Swingline Subfacility
Debt Instrument [Line Items]
Maximum borrowing capacity	5,000,000.0
Acquisition Borrower
Debt Instrument [Line Items]
Proceeds from borrowings	$ 1,095,000,000

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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