Acquisitions and Dispositions (Pro-Forma Information) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Business Combinations [Abstract]
Revenue	$ 5,083	$ 4,705
Net income attributable to the Company	$ 983	$ 755
Basic net income per share attributable to the Company (in dollars per share)	$ 1.93	$ 1.50
Diluted net income per share attributable to the Company (in dollars per share)	$ 1.91	$ 1.48