Derivative Financial Instruments - Schedule of Notional Amounts (Details) - Cash Flow Hedging	Jun. 30, 2020 USD ($)	Jun. 30, 2020 CAD ($)	Jun. 30, 2020 GBP (£)	Jun. 29, 2020 GBP (£)	Mar. 31, 2020 GBP (£)
July 1, 2020 – December 31, 2020 | North America | United States of America, Dollars | Interest Rate Swap Contracts
Derivative [Line Items]
Notional amount	$ 1,500,000,000
Weighted average fixed rate	1.69%	1.69%	1.69%
July 1, 2020 – December 31, 2020 | Europe & Africa | Interest Rate Swap Contracts
Derivative [Line Items]
Notional amount | £			£ 550,000,000
Weighted average fixed rate	0.94%	0.94%	0.94%
July 1, 2020 – December 31, 2020 | Australia & New Zealand | Interest Rate Swap Contracts
Derivative [Line Items]
Notional amount	$ 140,000,000
Weighted average fixed rate	1.59%	1.59%	1.59%
January 1, 2021 – December 31, 2021 | North America | United States of America, Dollars | Interest Rate Swap Contracts
Derivative [Line Items]
Notional amount	$ 1,200,000,000
Weighted average fixed rate	1.46%	1.46%	1.46%
January 1, 2021 – December 31, 2021 | Australia & New Zealand | Interest Rate Swap Contracts
Derivative [Line Items]
Notional amount	$ 40,000,000
Weighted average fixed rate	0.71%	0.71%	0.71%
January 1, 2022 – December 31, 2022 | North America | United States of America, Dollars | Interest Rate Swap Contracts
Derivative [Line Items]
Notional amount	$ 1,000,000,000
Weighted average fixed rate	1.17%	1.17%	1.17%
January 1, 2023 – December 31, 2024 | North America | United States of America, Dollars | Interest Rate Swap Contracts
Derivative [Line Items]
Notional amount	$ 600,000,000
Weighted average fixed rate	0.98%	0.98%	0.98%
July 1, 2020 – December 31, 2021 | North America | Canada, Dollars | Interest Rate Swap Contracts
Derivative [Line Items]
Notional amount		$ 125,000,000
Weighted average fixed rate	2.46%	2.46%	2.46%
January 1, 2021 – December 31, 2023 | North America | Interest Rate Cap Contracts
Derivative [Line Items]
Notional amount	$ 200,000,000
Weighted average fixed rate	3.25%	3.25%	3.25%
January 1, 2021 – December 31, 2022 | Europe & Africa | Interest Rate Swap Contracts
Derivative [Line Items]
Notional amount | £			£ 500,000,000
Weighted average fixed rate	0.94%	0.94%	0.94%
December 31, 2021 | Europe & Africa | Interest Rate Swap Contracts
Derivative [Line Items]
Notional amount | £			£ 50,000,000
Revolving Credit Facility | July 1, 2020 – December 31, 2020 | Interest Rate Derivatives
Derivative [Line Items]
Notional amount | £					£ 50,000,000
Weighted average fixed rate					0.95%
Revolving Credit Facility | December 31, 2021 | Interest Rate Derivatives
Derivative [Line Items]
Notional amount | £				£ 100,000,000	£ 100,000,000
Weighted average fixed rate					0.64%