Leases - Lease Maturity Schedule (Details) $ in Millions	Dec. 31, 2019 USD ($)
Operating Leases
2020	$ 11
2021	9
2022	7
2023	5
2024	4
After 2024	39
Total lease payments	75
Less: Interest	30
Present value of lease liabilities	45
Finance Leases
2020	2
2021	2
2022	1
2023	1
2024	1
After 2024	6
Total lease payments	13
Less: Interest	3
Present value of lease liabilities	10
Total
2020	13
2021	11
2022	8
2023	6
2024	5
After 2024	45
Total lease payments	88
Less: Interest	33
Present value of lease liabilities	$ 55