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Financial Instruments and Fair Value Measurements - Narrative (Details) € in Millions, £ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) | Oct. 31, 2022 USD ($) derivative | Jun. 30, 2022 derivative | Jul. 31, 2020 USD ($) derivative | Jun. 30, 2020 USD ($) derivative | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) derivative | Dec. 31, 2021 USD ($) derivative | Dec. 31, 2020 USD ($) property | Oct. 31, 2022 GBP (£) derivative | Oct. 31, 2022 EUR (€) derivative | Feb. 29, 2020 USD ($) derivative | May 31, 2019 USD ($) derivative | May 31, 2019 GBP (£) derivative | Oct. 31, 2018 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provisions for impairment on real estate |  |  |  |  |  |  | $ 25,860,000 | $ 38,967,000 | $ 147,232,000 |  |  |  |  |  |
Buildings and improvements |  |  |  |  |  |  | 29,707,751,000 | 25,155,178,000 |  |  |  |  |  |  |
Notional Amount |  |  |  |  |  |  | 3,463,200,000 | 2,731,900,000 |  |  |  |  |  |  |
Amount reclassified from AOCI |  |  |  |  |  |  | (1,242,000) | (6,802,000) | $ (15,051,000) |  |  |  |  |  |
COVID Related Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of impaired properties held for investment | property |  |  |  |  |  |  |  |  | 38 |  |  |  |  |  |
Provisions for impairment on real estate |  |  |  |  |  |  |  |  | $ 105,000,000 |  |  |  |  |  |
Term loans | Term loan due March 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 250,000,000
Notes payable | 0.750% notes, issued December 2020 and due in March 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 325,000,000 |  |  |  |  |  | $ 325,000,000 | $ 325,000,000 | 325,000,000 |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  |  |  | 0.75% | 0.75% |  |  |  |  |  |  |
Notional amount applied to notes payable | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes payable | 1.800% notes, issued in December 2020 and due in March 2033 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 400,000,000 |  |  |  |  |  | $ 400,000,000 | $ 400,000,000 | 400,000,000 |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  |  |  | 1.80% | 1.80% |  |  |  |  |  |  |
Notes payable | 5.625% Notes due 2032 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  | $ 750,000,000 |  |  |  |  | $ 750,000,000 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  | 5.625% |  |  |  |  | 5.625% |  |  | 5.625% | 5.625% |  |  |  |
Cash flow hedge |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount reclassified from AOCI |  |  |  |  |  |  | $ 28,466,000 | $ (6,802,000) | $ (15,051,000) |  |  |  |  |  |
Cash flow hedge | Designated as hedging instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional Amount |  |  |  |  |  |  | $ 755,500,000 | 1,092,400,000 |  |  |  |  |  |  |
Cross-currency swaps |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments terminated | derivative |  |  | 4 |  |  |  |  |  |  |  |  |  |  |  |
Amount reclassified from AOCI |  |  |  |  |  | $ 20,000,000 |  |  |  |  |  |  |  |  |
Cross-currency swaps | Not designated as hedging instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |
Notional Amount |  |  |  |  |  |  | $ 280,000,000.0 | 0 |  |  |  |  |  |  |
Cross-currency swaps | Cash flow hedge |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  | 6 |  |  |  |  |  |  |  | 6 | 6 |  | 4 | 4 |
Notional Amount |  | $ 600,000,000 |  |  |  |  |  |  |  | £ 612 |  |  | $ 166,000,000 | £ 130 |
Cross-currency swaps | Cash flow hedge | Designated as hedging instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  | 6 |  |  |  |  | 3 |  |  | 6 | 6 |  |  |  |
Notional Amount |  | $ 600,000,000 |  |  |  | $ 166,300,000 | $ 320,000,000.0 | 166,300,000 |  |  | € 612.0 |  |  |  |
Number of derivative instruments terminated | derivative |  |  | 4 |  |  |  |  |  |  |  |  |  |  |  |
Cross-currency swaps | Fair value hedge |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  | 3 |  |  |  |  |  |  |  | 3 | 3 |  |  |  |
Notional Amount |  | $ 320,000,000 |  |  |  |  |  |  |  | £ 326 |  |  |  |  |
Interest rate swap |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap unrealized loss expected to be reclassified within next twelve months |  |  |  |  |  |  | $ 11,900,000 |  |  |  |  |  |  |  |
Interest rate swap | Cash flow hedge |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |
Interest rate swap | Cash flow hedge | Designated as hedging instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |
Notional Amount |  |  |  |  |  |  | $ 250,000,000.0 | 250,000,000.0 |  |  |  |  |  |  |
Foreign currency forwards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cross-currency swap unrealized gains expected to be reclassified within next twelve months |  |  |  |  |  |  | $ (9,800,000) |  |  |  |  |  |  |  |
Foreign currency forwards | Cash flow hedge | Designated as hedging instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  |  |  |  |  |  | 30 |  |  |  |  |  |  |  |
Notional Amount |  |  |  |  |  |  | $ 185,500,000 | 176,100,000 |  |  |  |  |  |  |
Currency exchange swaps | Not designated as hedging instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  |  |  |  |  |  | 4 |  |  |  |  |  |  |  |
Notional Amount |  |  |  |  |  |  | $ 2,427,700,000 | 1,639,500,000 |  |  |  |  |  |  |
Remaining maturities |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |
Treasury rate locks | Cash flow hedge |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional Amount |  |  |  |  |  |  |  | $ 500,000,000 |  |  |  | $ 500,000,000 |  |  |
Number of derivative instruments terminated | derivative |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |
Treasury rate locks | Cash flow hedge | Designated as hedging instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  |  |  |  |  |  |  |  |  |  |  | 5 |  |  |
Forward-starting swap | Cash flow hedge |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  |  |  |  | 6 |  |  | 6 |  |  |  |  |  |  |
Notional Amount |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |
Forward-starting swap | Cash flow hedge | Designated as hedging instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  |  |  |  |  |  | 6 |  |  |  |  |  |  |  |
Forward-Starting Swaps Redesignated | Cash flow hedge |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  |  |  |  |  |  |  | 4 |  |  |  |  |  |  |
Notional Amount |  |  |  | $ 350,000,000 |  |  |  | $ 350,000,000 |  |  |  |  |  |  |
Number of derivative instruments terminated | derivative |  | 6 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of instruments being amortized | derivative |  |  |  | 4 |  |  |  |  |  |  |  |  |  |  |
Forward-Starting Swaps Not Redesignated | Cash flow hedge |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of derivative instruments | derivative |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Notional Amount |  |  |  |  |  |  |  | $ 150,000,000 |  |  |  |  |  |  |

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