Nature of Operations and Summary of Significant Accounting Policies - Contract Assets, Receivables, and Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 3,307	$ 3,089	$ 6,533	$ 5,554
Trade receivables before allowance for credit loss	$ 2,244		$ 2,244		$ 1,952
Percentage of outstanding receivables less than 90 days	91.00%		91.00%
Trade receivables	$ 2,180		$ 2,180		$ 1,906