Supplemental Disclosures to the Consolidated Statements of Cash Flows (Additional Information Concerning Acquisitions, Interest And Income Taxes Paid) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Supplemental Cash Flow Information [Abstract]
Assets acquired, excluding cash	$ 30	$ 0
Liabilities assumed	(2)	0
Contingent/deferred purchase consideration	(4)	0
Net cash outflow for current year acquisitions	24	0
Interest paid	171	191
Income taxes paid, net of refunds	$ 201	$ 122