Significant Accounting Policies - Summary of Future Lease Payments Under Non-Cancellable Leases (Details) $ in Millions	Dec. 31, 2019 USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
2020	$ 23
2021	23
2022	19
2023	13
2024	8
Thereafter	6
Total future lease payments	92
Less imputed interest	(8)
Total lease liabilities	84
Accrued expenses and other current liabilities	20	[1]
Other long-term liabilities	64	[2]
Total lease liabilities	84
Finance Lease Liabilities, Payments, Due [Abstract]
2020	9
2021	10
2022	10
2023	10
2024	10
Thereafter	57
Total future lease payments	106
Less imputed interest	(23)
Total lease liabilities	83
Accrued expenses and other current liabilities	5	[1]
Other long-term liabilities	78	[2]
Total lease liabilities	$ 83

[1] Refer to “Note 2: Significant Accounting Policies” for further information regarding our leases, including the transition accounting and updated accounting policies upon adoption of ASC 842 in 2019

[2] Refer to “Note 2: Significant Accounting Policies” for further information regarding our leases, including the transition accounting and updated accounting policies upon adoption of ASC 842 in 2019.