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Summary of Significant Accounting Policies - Prepaid Expenses and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Interest	$ 131,448	$ 97,987
Sales tax and VAT payable	131,780	115,352
Dividends	187,867	186,021
Operating lease liabilities	250,239	223,249
Other	444,954	339,143
Accrued expenses	$ 1,146,288	$ 961,752
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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities.

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