Acquisitions and Dispositions of Businesses - Completed Dispositions (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) disposition	Jun. 30, 2022 USD ($) disposition	Jun. 30, 2023 USD ($) disposition	Jun. 30, 2022 USD ($) disposition	Dec. 31, 2022 USD ($)
Business Combination and Asset Acquisition [Abstract]
Number of dispositions | disposition	0	1	0	3
Gain from sales of businesses	$ 0	$ 22	$ 0	$ 47
Assets held for sale	288		288		$ 0
Liabilities held for sale	$ 35		$ 35		$ 0