Nature of Operations and Summary of Significant Accounting Policies - Contract Assets, Receivables, and Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 3,027	$ 3,226
Trade receivables before allowance for credit loss	1,953		$ 1,871
Trade receivables	$ 1,899		$ 1,818