Mortgage Notes, Term Loans, and Secured Revolving Credit Facilities - Summary of Company's Mortgage Notes, Term Loans and Secured Revolving Credit Facilities (Detail) - USD ($)	9 Months Ended
Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 17,704,773,000	$ 17,044,428,000
Premium on assumed debt, net	9,758,000	10,794,000
Deferred financing costs, net	(135,499,000)	(125,563,000)
Mortgage notes, term loans, and secured revolving credit facilities, net	$ 17,579,032,000	16,929,659,000
Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	3.30%
Weighted Average Maturity Date	Feb. 18, 2027
Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 12,713,738,000	12,620,595,000
Fixed Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	3.80%
Weighted Average Maturity Date	Jul. 15, 2027
Variable Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 4,991,035,000	4,423,833,000
Variable Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Jun. 05, 2025
Variable Rate Loans [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	1.80%
Mortgage Notes [Member] \| Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 12,713,738,000	12,424,717,000
Mortgage Notes [Member] \| Fixed Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	3.80%
Weighted Average Maturity Date	Jul. 15, 2027
Mortgage Notes [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 3,209,340,000	1,826,435,000
Mortgage Notes [Member] \| Variable Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Feb. 08, 2026
Mortgage Notes [Member] \| Variable Rate Loans [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	1.80%
Mezzanine Loan [Member] \| Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding		195,878,000
Mezzanine Loan [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 142,200,000
Mezzanine Loan [Member] \| Variable Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Apr. 09, 2025
Mezzanine Loan [Member] \| Variable Rate Loans [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	4.30%
Term Loans [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 1,639,495,000	1,533,561,000
Term Loans [Member] \| Variable Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Feb. 11, 2024
Term Loans [Member] \| Variable Rate Loans [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	1.70%
Secured Revolving Credit Facility [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Maximum Facility Size	$ 2,339,495,000
Principal Balance Outstanding		$ 1,063,837,000

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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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.

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No definition available.

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- 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
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Amount, after accumulated amortization, of debt premium.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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