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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, 2020 | Mar. 31, 2019
Business Combinations [Abstract] |  |
Revenue | $ 4,657 | $ 4,536
Net income attributable to the Company | $ 754 | $ 684
Basic net income per share attributable to the Company (in dollars per share) | $ 1.49 | $ 1.35
Diluted net income per share attributable to the Company (in dollars per share) | $ 1.48 | $ 1.34

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