Significant Accounting Policies - Receivables and Contracted Balances (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Trade receivables (included in accounts receivable, net)	$ 9,084	$ 7,932
Contract liabilities (included in accrued expenses)	$ 80	$ 87	$ 79	$ 71