Represents the maximum amount of cash that may be used for acquisitions during the covenant relief period.

No definition available.

Name:	sho_DebtCovenantCashAvailableForAcquisitions
Namespace Prefix:	sho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the maximum amount of cash that may be used for capital improvements during the covenant relief period.

+ References

No definition available.

+ Details

Name:	sho_DebtCovenantCashAvailableForCapitalImprovements
Namespace Prefix:	sho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the value of additional preferred stock allowed to be issued during the Covenant Relief Period.

+ References

No definition available.

+ Details

Name:	sho_DebtCovenantPreferredStockAuthorization
Namespace Prefix:	sho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the percentage points added to the spread on the variable rate to compute the increased variable rate on the debt instrument during the covenant relief period.

+ References

No definition available.

+ Details

Name:	sho_DebtInstrumentBasisAdditionToSpreadRate
Namespace Prefix:	sho_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage points added to the reference rate during the covenant relief period to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	sho_DebtInstrumentBasisSpreadOnVariableRateDuringCovenantReliefPeriod
Namespace Prefix:	sho_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents a debt instruments variable rate floor as a percentage.

+ References

No definition available.

+ Details

Name:	sho_DebtInstrumentVariableRateFloor
Namespace Prefix:	sho_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the incremental percentage increase in the stated rate on a debt instrument while the Company's leverage ratio is higher than allowed under its debt covenants.

+ References

No definition available.

+ Details

Name:	sho_IncreaseInInterestRateDueToElevatedLeverageRatio
Namespace Prefix:	sho_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the incremental percentage increase in the stated rate on a debt instrument while the Company's leverage ratio is at its maximum.

+ References

No definition available.

+ Details

Name:	sho_IncreaseInInterestRateDueToMaximumLeverageRatio
Namespace Prefix:	sho_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the leverage ratio under a debt covenant.

+ References

No definition available.

+ Details

Name:	sho_LeverageRatio
Namespace Prefix:	sho_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the minimum liquidity required under a Company's debt covenants.

+ References

No definition available.

+ Details

Name:	sho_MinimumLiquidityRequiredDueToDebtCovenants
Namespace Prefix:	sho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the number of extension periods available for secured debt.

+ References

No definition available.

+ Details

Name:	sho_NumberOfExtensionPeriodsAvailableForSecuredDebt
Namespace Prefix:	sho_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of extension periods available for unsecured debt.

+ References

No definition available.

+ Details

Name:	sho_NumberOfExtensionPeriodsForUnsecuredDebt
Namespace Prefix:	sho_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents restricted cash paid to a mortgage holder as a concession upon extinguishment of debt.

+ References

No definition available.

+ Details

Name:	sho_PaymentConcessionsUponExtinguishmentOfDebtRestrictedCash
Namespace Prefix:	sho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents unrestricted cash paid to a mortgage holder as a concession upon extinguishment of debt.

+ References

No definition available.

+ Details

Name:	sho_PaymentConcessionsUponExtinguishmentOfDebtUnrestrictedCash
Namespace Prefix:	sho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the term of a secured debt's extension period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	sho_TermOfExtensionPeriodForSecuredDebt
Namespace Prefix:	sho_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the term of an unsecured debt's extension period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	sho_TermOfExtensionPeriodForUnsecuredDebt
Namespace Prefix:	sho_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the Company's write-off of accrued liabilities upon extinguishment of debt.

+ References

No definition available.

+ Details

Name:	sho_WriteOffOfAccruedLiabilitiesInConnectionWithExtinguishmentOfDebt
Namespace Prefix:	sho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_DebtDefaultLongtermDebtAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentInterestRateIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Latest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentMaturityDateRangeEnd1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

Name:	us-gaap_ExtinguishmentOfDebtAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_ExtinguishmentOfDebtDisclosuresAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

+ Details

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsOfDebtExtinguishmentCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is uncollateralized (where debt is not backed by the pledge of collateral).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromUnsecuredLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow from the repayment of a long-term debt instrument issued, secured by a first mortgage deed of trust, containing a pledge of real property. The lender has the highest claim on the property in case of default.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfFirstMortgageBond
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfLongTermLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfUnsecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_UnsecuredLongtermDebtCurrentAndNoncurrentAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

Name:	us-gaap_WriteOffOfDeferredDebtIssuanceCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_ExtinguishmentOfDebtAxis=sho_HiltonTimesSquareMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=sho_RenaissanceWashingtonDcMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=sho_HiltonSanDiegoBayfrontHotelMortgagePayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=sho_UnsecuredTermLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=sho_UnsecuredTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=sho_UnsecuredTermLoan2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=sho_UnsecuredSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=sho_UnsecuredSeriesSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=sho_UnsecuredSeriesBSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Notes payable - Narrative (Details)			1 Months Ended					3 Months Ended		12 Months Ended				15 Months Ended
Notes payable - Narrative (Details)	Aug. 28, 2020 USD ($)	Aug. 11, 2020 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jul. 31, 2020	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019	Dec. 31, 2018 USD ($)	Mar. 31, 2022 USD ($)
Extinguishment of Debt Disclosures [Abstract]
Payments of debt extinguishment costs											$ 27,975,000		$ 131,000
Gain (loss) on extinguishment of debt, net											6,146,000		(835,000)
Unsecured Term Loans Transactions
Proceeds from credit facility											300,000,000
Payments on credit facility											300,000,000
Hilton Times Square mortgage
Extinguishment of Debt Disclosures [Abstract]
Extinguishment of Debt, Amount			$ 77,200,000
Payments of debt extinguishment costs			20,000,000.0
Payment concessions upon extinguishment of debt - restricted cash			3,200,000								3,200,000
Payment concessions upon extinguishment of debt - unrestricted cash			800,000								800,000
Write-off of accrued liabilities in connection with extinguishment of debt			22,200,000
Gain (loss) on extinguishment of debt, net			6,400,000
Loss contingency accrual			11,600,000								11,600,000
Unsecured revolving credit facility
Unsecured Term Loans Transactions
Proceeds from credit facility							$ 300,000,000.0
Payments on credit facility	$ 11,200,000	$ 38,800,000				$ 250,000,000.0
Remaining borrowing capacity available			$ 500,000,000.0								$ 500,000,000.0
Credit facility expiration date											Apr. 14, 2023
Number of credit facility extension periods			2								2
Term of extension period for unsecured debt											6 months
Credit facility expiration date after extensions											Apr. 14, 2024
Debt instrument basis spread on variable rate during covenant relief period														2.40%
Renaissance Washington DC Mortgage
Debt Instruments [Line Items]
Repayment of mortgage debt			$ 107,900,000
Hilton San Diego Bayfront mortgage
Debt Instruments [Line Items]
Number of extension periods available for secured debt											2	2
Term of extension period for secured debt											1 year	1 year
Debt Instrument, Debt Default
Debt maturity date											Dec. 09, 2021	Dec. 09, 2021
Unsecured Term Loans
Unsecured Term Loans Transactions
Debt instrument basis spread on variable rate during covenant relief period														2.35%
Unsecured Term Loans \| Unsecured revolving credit facility
Extinguishment of Debt Disclosures [Abstract]
Gain (loss) on extinguishment of debt, net													$ (800,000)
Unsecured Term Loans Transactions
Debt Covenant Preferred Stock Authorization														$ 200,000,000.0
Debt Covenant Cash Available For Acquisitions														$ 250,000,000.0
Debt covenant cash available for capital improvements										$ 100,000,000.0
Debt instrument variable rate floor					0.25%
Debt instrument basis addition to spread rate														0.15%
Minimum liquidity required due to debt covenants														$ 180,000,000.0
$85.0 million term loan
Debt Instrument, Debt Default
Debt maturity date											Sep. 03, 2022	Sep. 03, 2022
$100.0 million term loan
Debt Instrument, Debt Default
Debt maturity date											Jan. 31, 2023	Jan. 31, 2023
Senior Notes
Unsecured Term Loans Transactions
Payments on unsecured debt				$ 35,000,000.0
Write-off of deferred financing costs				200,000							$ 200,000
Increase (decrease) in interest rate (as a percent)			0.25%		1.00%			(0.25%)	0.25%					1.25%
Increase in interest rate due to maximum leverage ratio (as a percent)								1.00%
Increase in interest rate due to elevated leverage ratio (as a percent)								0.75%
Senior Notes \| Minimum
Unsecured Term Loans Transactions
Leverage ratio								5.00			5.0
Senior Notes \| Maximum
Unsecured Term Loans Transactions
Leverage ratio								6.50
Series A Senior Notes
Unsecured Term Loans Transactions
Payments on unsecured debt				30,000,000.0
Debt Instrument, Debt Default
Debt maturity date											Jan. 10, 2026	Jan. 10, 2026
Series B Senior Notes
Unsecured Term Loans Transactions
Payments on unsecured debt				$ 5,000,000.0
Debt Instrument, Debt Default
Debt maturity date											Jan. 10, 2028	Jan. 10, 2028
London Interbank Offered Rate (LIBOR) \| Unsecured revolving credit facility
Unsecured Term Loans Transactions
Debt instrument basis spread on variable rate during covenant relief period			2.40%
London Interbank Offered Rate (LIBOR) \| Unsecured Term Loans
Unsecured Term Loans Transactions
Debt instrument basis spread on variable rate during covenant relief period			2.35%
Base Rate \| Unsecured Term Loans
Unsecured Term Loans Transactions
Debt instrument variable rate floor					0.25%
Base Rate \| $85.0 million term loan \| Minimum
Unsecured Term Loans Transactions
Debt instrument variable rate floor											0.25%	0.25%
Base Rate \| $100.0 million term loan \| Minimum
Unsecured Term Loans Transactions
Debt instrument variable rate floor											0.25%	0.25%