Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Proceeds from income tax refunds	$ 34
Number of subsequent years we may not able to qualify as REIT if failed to qualify for taxation as a REIT in any taxable year	4 years
Income tax provision	$ (91)	$ (220)	$ 30
Valuation allowance	18	19
Net decrease in valuation allowance	1
Total deferred tax assets, net of valuation allowance	$ 276	$ 185
Statutory federal income tax rate	21.00%	21.00%
Cash paid for income taxes, net of refunds received			93
Recognized material interest or penalties	$ 0	$ 0	$ 0
Lower Limit
Income Taxes [Line Items]
Open tax year by major tax jurisdiction	2018
Upper Limit
Income Taxes [Line Items]
Open tax year by major tax jurisdiction	2021
Domestic | AOCI Foreign Exchange Net loss
Income Taxes [Line Items]
Valuation allowance	$ 5
Domestic | Capital Loss Carryover
Income Taxes [Line Items]
Valuation allowance	8
Foreign Tax Authority | Net Operating Loss and Capital Loss Carryover
Income Taxes [Line Items]
Valuation allowance	$ 5
Lower Limit
Income Taxes [Line Items]
Percentage of annual taxable income Host Inc is required to distribute	90.00%