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Leases - Remaining Minimum Lease Payments (Details) $ in Millions	Jun. 30, 2019 USD ($)
Operating Leases
Remainder of 2019	$ 8
2020	14
2021	12
2022	9
2023	6
Thereafter	4
Total lease payments	53
Less: imputed interest	(7)
Lease liability	46
Financing Leases
Remainder of 2019	5
2020	11
2021	11
2022	11
2023	10
Thereafter	53
Total lease payments	101
Less: imputed interest	(33)
Lease liability	$ 68

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