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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	Oct. 20, 2021	Aug. 30, 2021	Nov. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Oct. 14, 2021	Sep. 30, 2021
Term loan facilities
Subsequent Event [Line Items]
Maximum borrowing capacity							$ 1,518.6
Revolving credit facilities
Subsequent Event [Line Items]
Maximum borrowing capacity							$ 1,275.0
Subsequent Event
Subsequent Event [Line Items]
Dividend approved and declared (in dollars per share)	$ 0.65
Stock repurchase program, authorized amount	$ 200.0
Subsequent Event | Term loan facilities
Subsequent Event [Line Items]
Debt, restructuring						$ (1,200.0)
Subsequent Event | Unsecured Financing
Subsequent Event [Line Items]
Debt, restructuring						1,200.0
Subsequent Event | Senior Notes
Subsequent Event [Line Items]
Debt, restructuring						(2,300.0)
Subsequent Event | Unsecured
Subsequent Event [Line Items]
Debt, restructuring						2,300.0
Subsequent Event | Revolving credit facilities
Subsequent Event [Line Items]
Maximum borrowing capacity						$ 2,000.0
8.50% Series A Cumulative Redeemable Perpetual Preference Shares
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage					8.50%
8.50% Series A Cumulative Redeemable Perpetual Preference Shares | Subsequent Event
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage	8.50%
Dividend approved and declared (in dollars per share)	$ 0.5312500
8.00% Series B Cumulative Redeemable Perpetual Preference Shares
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage				8.00%
8.00% Series B Cumulative Redeemable Perpetual Preference Shares | Subsequent Event
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage	8.00%
Dividend approved and declared (in dollars per share)	$ 0.5000000
7.375% Series C Cumulative Redeemable Perpetual Preference Shares
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage			7.375%
7.375% Series C Cumulative Redeemable Perpetual Preference Shares | Subsequent Event
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage	7.375%
Dividend approved and declared (in dollars per share)	$ 0.4609375
6.875% Series D Cumulative Redeemable Perpetual Preference Shares | Subsequent Event
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage	6.875%
Dividend approved and declared (in dollars per share)	$ 0.4296875
5.75% Series E Cumulative Redeemable Perpetual Preference Shares
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage		5.75%
5.75% Series E Cumulative Redeemable Perpetual Preference Shares | Subsequent Event
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage	5.75%
Dividend approved and declared (in dollars per share)	$ 0.3593750

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- Definition

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586

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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

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

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- Definition

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