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Acquisitions - Narrative (Details)
€ in Millions, $ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
May 31, 2023
USD ($)
Feb. 28, 2023
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2022
EUR (€)
May 31, 2022
USD ($)
Mar. 31, 2022
USD ($)
dataCenter
Feb. 28, 2022
USD ($)
Jan. 31, 2022
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
tenantLease
Leased Building                      
Business Acquisition [Line Items]                      
Discount rate for projected net cash flow                   7.25%  
Terminal capitalization rate                   6.50%  
Customer relationships and service contracts                      
Business Acquisition [Line Items]                      
Discount rate for projected net cash flow                   6.80%  
Affiliated Entity                      
Business Acquisition [Line Items]                      
Number of tenant leases | tenantLease                     15
DataBank Data Centers                      
Business Acquisition [Line Items]                      
Purchase price   $ 8.2         $ 88.7 $ 17.6 $ 32.0    
Number of data centers acquired | dataCenter             4        
DataBank Data Centers | DataBank                      
Business Acquisition [Line Items]                      
Purchase price   151.0       $ 10.9 $ 678.0        
Debt assumed   121.0         262.5        
Equity consideration transferred   $ 40.8         $ 415.5        
Vantage SDC Expansion Capacity                      
Business Acquisition [Line Items]                      
Asset acquisition, contingent consideration                   $ 185.0  
Vantage SDC Expansion Capacity | Affiliated Entity                      
Business Acquisition [Line Items]                      
Purchase price                     $ 161.3
Vantage SDC Expansion Capacity | Forecast                      
Business Acquisition [Line Items]                      
Asset acquisition, contingent consideration $ 122.0                    
TowerCo                      
Business Acquisition [Line Items]                      
Purchase price       $ 791.3 € 740.1            
Debt assumed       326.1              
Equity consideration transferred       278.1              
TowerCo | Investor                      
Business Acquisition [Line Items]                      
Equity consideration transferred       $ 213.8              
Investment management contracts                      
Business Acquisition [Line Items]                      
Discount rate for projected net cash flow                   8.00%  
Investor Relationships                      
Business Acquisition [Line Items]                      
Discount rate for projected net cash flow                   14.00%  
Minimum | Building                      
Business Acquisition [Line Items]                      
Plant, property and equipment acquired, useful life                   35 years  
Minimum | Site improvements                      
Business Acquisition [Line Items]                      
Plant, property and equipment acquired, useful life                   1 year  
Minimum | Tenant Improvements                      
Business Acquisition [Line Items]                      
Plant, property and equipment acquired, useful life                   1 year  
Minimum | Towers And Equipment                      
Business Acquisition [Line Items]                      
Plant, property and equipment acquired, useful life                   11 years  
Minimum | Data center infrastructure                      
Business Acquisition [Line Items]                      
Plant, property and equipment acquired, useful life                   11 years  
Minimum | Customer Contracts                      
Business Acquisition [Line Items]                      
Useful life                   1 year  
Minimum | Customer relationships and service contracts                      
Business Acquisition [Line Items]                      
Useful life                   19 years  
Minimum | Investment management contracts                      
Business Acquisition [Line Items]                      
Useful life                   1 year  
Minimum | In-Place Lease                      
Business Acquisition [Line Items]                      
Useful life                   1 year  
Discount rate for projected net cash flow                   4.75%  
Minimum | Above and Below Market Lease                      
Business Acquisition [Line Items]                      
Useful life                   1 year  
Discount rate for projected net cash flow                   6.00%  
Minimum | Customer relationships and service contracts                      
Business Acquisition [Line Items]                      
Useful life                   5 years  
Discount rate for projected net cash flow                   4.75%  
Maximum | Building                      
Business Acquisition [Line Items]                      
Plant, property and equipment acquired, useful life                   55 years  
Maximum | Site improvements                      
Business Acquisition [Line Items]                      
Plant, property and equipment acquired, useful life                   15 years  
Maximum | Tenant Improvements                      
Business Acquisition [Line Items]                      
Plant, property and equipment acquired, useful life                   4 years  
Maximum | Towers And Equipment                      
Business Acquisition [Line Items]                      
Plant, property and equipment acquired, useful life                   71 years  
Maximum | Data center infrastructure                      
Business Acquisition [Line Items]                      
Plant, property and equipment acquired, useful life                   30 years  
Maximum | Customer Contracts                      
Business Acquisition [Line Items]                      
Useful life                   6 years  
Maximum | Customer relationships and service contracts                      
Business Acquisition [Line Items]                      
Useful life                   45 years  
Maximum | Investment management contracts                      
Business Acquisition [Line Items]                      
Useful life                   4 years  
Maximum | Investor Relationships                      
Business Acquisition [Line Items]                      
Useful life                   12 years  
Maximum | In-Place Lease                      
Business Acquisition [Line Items]                      
Useful life                   15 years  
Discount rate for projected net cash flow                   7.25%  
Maximum | Above and Below Market Lease                      
Business Acquisition [Line Items]                      
Useful life                   4 years  
Discount rate for projected net cash flow                   11.25%  
Maximum | Customer relationships and service contracts                      
Business Acquisition [Line Items]                      
Useful life                   15 years  
Discount rate for projected net cash flow                   11.25%  
AMP Capital Investors International Holdings Limited                      
Business Acquisition [Line Items]                      
Acquisition price     $ 314.3