Debt - Debt Summary (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Weighted Average Interest Rate	1.50%	1.60%
Weighted Average Term	10 years 4 months 24 days	10 years 4 months 24 days
Debt	$ 18,368,538	$ 17,715,054
Credit Facilities [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	0.00%	0.80%
Weighted Average Term	0 years	1 year 7 months 6 days
Debt	$ 0	$ 491,393
Senior Notes [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	1.60%	1.70%
Weighted Average Term	11 years 2 months 12 days	11 years 7 months 6 days
Debt	$ 16,341,307	$ 14,981,690
Term Loans and Unsecured Other [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	0.50%	0.50%
Weighted Average Term	3 years 10 months 24 days	4 years 2 months 12 days
Debt	$ 1,751,284	$ 1,825,195
Secured Mortgage [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	3.60%	5.10%
Weighted Average Term	5 years 9 months 18 days	4 years 8 months 12 days
Debt	$ 275,947	$ 416,776