Nature of Operations and Summary of Significant Accounting Policies - Contract Assets, Receivables, and Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 3,063	$ 3,071	$ 9,596	$ 8,625
Trade receivables before allowance for credit loss	2,088		2,088		$ 1,952
Trade receivables	$ 2,031		$ 2,031		$ 1,906