Notes Payable and Revolving Lines of Credit - Schedule of Lines of Credit (Details)	Dec. 31, 2020 USD ($)
Line of Credit Facility [Line Items]
Debt Capacity	$ 1,190,000,000
Line of Credit
Line of Credit Facility [Line Items]
Debt Capacity	1,850,000,000
Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt Capacity	650,000,000
Tranche 1 Term Loan Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt Capacity	480,000,000
Tranche 2 Term Loan Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt Capacity	220,000,000
Tranche 3 Term Loan Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt Capacity	245,000,000
Tranche 4 Term Loan Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt Capacity	$ 255,000,000