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Acquisitions and Dispositions (Pro-Forma Information) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
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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

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