Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	May 29, 2020	Dec. 31, 2019	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Operating lease, weighted average remaining lease term	11 years 6 months		11 years 4 months 24 days	11 years 4 months 24 days
Operating lease, weighted average discount rate	4.40%		4.40%
Gain contingency, amount held in escrow		$ 20
Positive Outcome Of Litigation, Reimbursement Of Payment
Lessee, Lease, Description [Line Items]
Gain contingency, amount held in escrow		10
Positive Outcome Of Litigation, Termination Penalty Repayment
Lessee, Lease, Description [Line Items]
Gain contingency, amount held in escrow		$ 10
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	2 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	15 years