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Segment Information (Segment and Geographic Information) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | $ 5,353.9 | $ 6,049.7 | $ 10,492.8 | $ 11,725.6
Operating Income | 2,262.3 | 2,295.1 | 4,405.4 | 4,329.1
United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 1,961.2 | 2,048.4 | 3,828.4 | 3,977.4
Operating Income | 999.2 | 1,072.9 | 1,997.2 | 2,020.8
International Lead Markets |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 1,930.9 | 1,813.2 | 3,808.4 | 3,456.7
Operating Income | 889.9 | 776.0 | 1,699.6 | 1,442.6
High Growth Markets |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 1,014.0 | 1,679.2 | 1,986.2 | 3,216.4
Operating Income | 282.7 | 349.5 | 517.0 | 650.2
Foundational Markets and Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 447.8 | 508.9 | 869.8 | 1,075.1
Operating Income | $ 90.5 | $ 96.7 | $ 191.6 | $ 215.5

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