Debt - Principal Payments (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018 USD ($)
Line of Credit Facility [Line Items]
Senior secured leverage ratio	3.00
Maximum
Line of Credit Facility [Line Items]
Unused commitment fee percentage	0.25%
Commitment fee percentage	0.375%
Senior Secured Credit Facilities
Line of Credit Facility [Line Items]
Periodic payment		$ 62
Term Loan A
Line of Credit Facility [Line Items]
Increase (Decrease) in marginal interest rate	(0.25%)
Senior secured leverage ratio	2.25
Term Loan A | Senior Secured Credit Facilities | First two years
Line of Credit Facility [Line Items]
Equal quarterly principal installments	1.25%
Term Loan A | Senior Secured Credit Facilities | Next three years
Line of Credit Facility [Line Items]
Equal quarterly principal installments	2.50%
Term Loan B
Line of Credit Facility [Line Items]
Increase (Decrease) in marginal interest rate	(0.25%)
Senior secured leverage ratio	3.00
Term Loan B | Senior Secured Credit Facilities
Line of Credit Facility [Line Items]
Equal quarterly principal installments	0.25%
Term Loan B | Senior Secured Credit Facilities | Eurocurrency
Line of Credit Facility [Line Items]
Marginal interest rate	2.00%
Term Loan B | Senior Secured Credit Facilities | Base Rate
Line of Credit Facility [Line Items]
Marginal interest rate	1.00%
Term Loan B | Senior Secured Credit Facilities | LIBOR
Line of Credit Facility [Line Items]
Marginal interest rate	1.00%
Term Loan B | Senior Secured Credit Facilities | Federal Funds Effective Rate
Line of Credit Facility [Line Items]
Marginal interest rate	0.50%
Term Loan C [Member]
Line of Credit Facility [Line Items]
Excess cash flow payment percentage	50.00%