Acquisitions and Dispositions of Businesses - Schedule of Net Assets Acquired (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets acquired
Goodwill	$ 8,434	$ 8,666	$ 8,165
2021 And 2020 Acquisitions
Consideration transferred
Cash	27
Deferred, contingent, and other consideration	17
Aggregate consideration transferred	44
Assets acquired
Goodwill	17
Other intangible assets	13
Other assets	26
Total assets acquired	56
Liabilities assumed
Total liabilities assumed	12
Net assets acquired	44
Cash and cash equivalents	12
Funds held on behalf of client	$ 1