Fair Value Measurements - Fair Value of Debt and Hierarchy Level Used to Estimate Fair Values (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Carrying amount [Member] | SF CMBS Loan [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	$ 725	$ 725
Carrying amount [Member] | HHV CMBS Loan [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	1,275	1,275
Carrying amount [Member] | 2016 Term Loan [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan		700
Carrying amount [Member] | 2019 Term Facility [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	670	670
Carrying amount [Member] | Revolver [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	601
Carrying amount [Member] | Mortgage Loans [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	509	516
Carrying amount [Member] | 2025 Senior Secured Notes [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	650
Carrying amount [Member] | 2028 Senior Secured Notes [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	725
Fair Value [Member] | SF CMBS Loan [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	708	740
Fair Value [Member] | HHV CMBS Loan [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	1,195	1,316
Fair Value [Member] | 2016 Term Loan [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan		698
Fair Value [Member] | 2019 Term Facility [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	661	667
Fair Value [Member] | Revolver [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	596
Fair Value [Member] | Mortgage Loans [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	480	$ 516
Fair Value [Member] | 2025 Senior Secured Notes [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	705
Fair Value [Member] | 2028 Senior Secured Notes [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan	$ 774