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Intangible Assets (Roll Forward) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Intangible Assets Roll Forward    
Beginning balance $ 33,046.1 $ 34,697.5
Changes 34.9 (1,685.0)
Amortization charged (484.0) (364.0)
Foreign currency translation 267.3 185.6
Ending balance $ 32,864.3 $ 32,834.1