Leasing - Schedule of Future Lease Payments for Operating and Finance Leases After Adoption (Details) $ in Millions	Dec. 31, 2019 USD ($)
Operating leases
2020	$ 30
2021	37
2022	35
2023	31
2024	28
Thereafter	154
Total future lease payments	315
Imputed interest	61
Present value of lease liabilities	254
Finance leases
2020	3
2021	4
2022	3
2023	4
2024	4
Thereafter	26
Total future lease payments	44
Imputed interest	19
Present value of lease liabilities	25
Undiscounted future lease payments for leases not yet commenced	$ 45
Term for leases that have not yet commenced	15 years