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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Related Party Transaction [Line Items]
Total interest payments	$ 10	$ 14
CMBS Facility \| Blackstone
Related Party Transaction [Line Items]
Outstanding amount, revolving facility	83		$ 88
Total interest payments	$ 1	$ 2
Blackstone
Related Party Transaction [Line Items]
Equity method investment ownership percentage	30.00%