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Assets Held for Sale (Details)
$ in Millions
Dec. 31, 2020
development_site
Jun. 30, 2020
USD ($)
Oct. 08, 2019
Long Lived Assets Held-for-sale [Line Items]      
Equity method investment, ownership percentage     20.00%
GIC, Singapore Sovereign Wealth Fund | GIC      
Long Lived Assets Held-for-sale [Line Items]      
Equity method investment, ownership percentage     80.00%
Forecast      
Long Lived Assets Held-for-sale [Line Items]      
Equity method investment, ownership percentage 20.00%    
Number of development sites | development_site 3    
Forecast | GIC, Singapore Sovereign Wealth Fund | GIC      
Long Lived Assets Held-for-sale [Line Items]      
Equity method investment, ownership percentage 80.00%    
Liabilities held-for-sale      
Long Lived Assets Held-for-sale [Line Items]      
Liabilities held-for-sale   $ 7.2  
Property, plant and equipment      
Long Lived Assets Held-for-sale [Line Items]      
Assets held-for-sale   141.2  
Other Current Assets      
Long Lived Assets Held-for-sale [Line Items]      
Assets held-for-sale   $ 11.0