Summary of Significant Accounting Policies - Interest and Software (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Summary of Significant Accounting Policies
Total interest costs	$ 425	$ 388	$ 473
Total capitalized interest costs	29	13	16
Capitalized internal-use software, net	45	48
Internal-use software accumulated amortization	27	11
Internal-use software amortization expense	$ 16	$ 10	$ 1