v3.19.3

Leases - Narrative (Details) ft² in Thousands, $ in Millions	1 Months Ended	9 Months Ended	12 Months Ended
	Nov. 30, 2016 lease	Sep. 30, 2019 USD ($)	Dec. 31, 2015 ft² building	Dec. 31, 2018 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease, lease not yet commenced		$ 550
Finance lease, lease not yet commenced		3
Property and equipment, net		$ 1,537		$ 1,641
Finance Obligation
Lessee, Lease, Description [Line Items]
Number of buildings under contract | building			2
Rentable square feet under contract | ft²			423
Ownership acquired under the sale leaseback contract		49.00%	49.00%
Ownership percentage retained following lease termination	100.00%
Land Leases
Lessee, Lease, Description [Line Items]
Number of land agreement leases | lease	2
Lease term	75 years
Commitments under Land Leases		$ 167
Financing obligation		79
Future land lease payments		$ 1,800
Future land lease payments, percentage allocated to operating lease		51.00%
Land Leases | Land
Lessee, Lease, Description [Line Items]
Property and equipment, net		$ 65
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, lease not yet commenced, term		2 years
Finance lease, lease not yet commenced, term		2 years
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, lease not yet commenced, term		11 years
Finance lease, lease not yet commenced, term		11 years

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Area of a real estate property.

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