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

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the credit rating indicative of likelihood of repayment of the debt instrument given by a credit rating agency (for example, Standard and Poor's, Moody's, Fitch).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Debt - Narratives (Details)			1 Months Ended	12 Months Ended
Debt - Narratives (Details)	Feb. 22, 2017 USD ($) option	Jan. 19, 2017	Jan. 31, 2017 USD ($) loan	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2017 EUR (€)	Jun. 08, 2017 USD ($)	Jun. 08, 2017 EUR (€)	Feb. 22, 2017 EUR (€) option
Revolving Line Of Credit
Line of credit, maximum borrowing amount				$ 2,350,000,000.00
Unsecured revolving credit facility				216,775,000	$ 676,715,000
Debt financing cost				15,920,000
Senior Unsecured Notes
Unamortized discount (premium)				12,829,000
Payment of financing costs				$ 12,675,000	3,619,000	$ 10,878,000
Non Recourse Debt
Debt instrument maturity date, range start				Mar. 01, 2018
Debt instrument maturity date, range end				Jun. 01, 2027
Prepayments of mortgage principal				$ 191,599,000	321,705,000	91,560,000
Scheduled payments of mortgage principal				344,440,000	161,104,000	90,328,000
Interest paid				155,400,000	182,200,000	174,500,000
Increase in value of balance sheet item due to foreign currency translation				72,428,000	(92,434,000)	$ (125,447,000)
Merged Entities
Senior Unsecured Notes
Unamortized discount (premium)				$ 1,700,000
Fixed interest rate \| Minimum
Non Recourse Debt
Real estate mortgage interest rate				2.00%
Fixed interest rate \| Maximum
Non Recourse Debt
Real estate mortgage interest rate				7.80%
Variable interest rate \| Minimum
Non Recourse Debt
Real estate mortgage interest rate				0.90%
Variable interest rate \| Maximum
Non Recourse Debt
Real estate mortgage interest rate				6.90%
Revolving Credit Facility
Revolving Line Of Credit
Line of credit, maximum borrowing amount	$ 1,850,000,000.00				1,500,000,000.0
Line of credit, amount available in foreign currency				$ 1,000,000,000	750,000,000
Amount available for swing line loan				75,000,000	50,000,000
Amount available for letters of credit				50,000,000	50,000,000
Number of extension options \| option	2									2
Option extension period	6 months
Line of credit facility, available				1,300,000,000
Letters of credit outstanding, amount				$ 100,000
Debt Instrument borrowing capacity fee (percentage)				0.20%
Revolving Credit Facility \| Standard & Poor's, BBB Rating
Revolving Line Of Credit
Debt instrument, credit rating				BBB
Revolving Credit Facility \| Moody's, Baa2 Rating
Revolving Line Of Credit
Debt instrument, credit rating				Baa2
Revolving Credit Facility \| Other assets
Revolving Line Of Credit
Debt financing cost				$ 8,500,000
Amended Revolver
Revolving Line Of Credit
Line of credit, maximum borrowing amount	$ 1,500,000,000.0
Term Loan Facility
Revolving Line Of Credit
Line of credit, maximum borrowing amount					250,000,000					€ 236,300,000.0
Unsecured revolving credit facility	250,000,000									€ 236,300,000
Debt financing cost				$ 200,000	100,000
Debt Instrument borrowing capacity fee (percentage)				0.20%
Senior Unsecured Notes
Unamortized discount (premium)				$ 1,200,000
Delayed Draw Term Loan Facility
Revolving Line Of Credit
Line of credit, maximum borrowing amount	$ 100,000,000
Unsecured revolving credit facility								$ 100,000,000	€ 88,700,000
Senior Unsecured Notes
Maturity Date				Feb. 22, 2022
Senior Unsecured Notes
Revolving Line Of Credit
Debt financing cost				$ 14,700,000	12,100,000
Senior Unsecured Notes
Principal Amount				2,500,000,000.0
Unamortized discount (premium)				9,900,000	$ 7,800,000
Payment of financing costs				$ 4,000,000
Senior Unsecured Notes \| Minimum
Senior Unsecured Notes
Debt instrument, basis spread on variable rate				3.00%
Senior Unsecured Notes \| Maximum
Senior Unsecured Notes
Debt instrument, basis spread on variable rate				3.50%
Senior Unsecured Notes \| 4.25% Senior Notes
Senior Unsecured Notes
Principal Amount				$ 350,000,000
Issue Date				Sep. 12, 2016
Debt instrument stated interest rate				4.25%			4.25%
Price of Par Value				99.682%			99.682%
Maturity Date				Oct. 01, 2026
Coupon Rate				4.25%
Senior Unsecured Notes \| 2.25 Euro Senior Notes
Senior Unsecured Notes
Principal Amount \| €							€ 500,000,000
Issue Date				Jan. 19, 2017
Debt instrument stated interest rate				2.25%			2.25%
Debt instrument, term		7 years 6 months		7 years 6 months
Price of Par Value				99.448%			99.448%
Maturity Date				Jul. 19, 2024
Coupon Rate				2.25%
Secured Debt \| International Properties
Non Recourse Debt
Loans repaid, count \| loan			2
Scheduled payments of mortgage principal			$ 243,800,000
Secured Debt \| International Properties \| Noncontrolling interest
Non Recourse Debt
Scheduled payments of mortgage principal			$ 90,300,000	$ 47,100,000
Debt instrument weighted average interest rate			5.40%
Non-Recourse Debt
Non Recourse Debt
Prepayments of mortgage principal				191,600,000
Scheduled payments of mortgage principal				$ 47,500,000
Debt instrument weighted average interest rate				5.70%			5.70%
Loss on the extinguishment of debt				$ 900,000
Increase in value of balance sheet item due to foreign currency translation				$ 235,800,000