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Other Intangibles - Indefinite-Lived Intangible Assets Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2016
Indefinite-lived Intangible Assets [Line Items]    
In-process research and development impairment charges $ 195 $ 220
House Dust Mite    
Indefinite-lived Intangible Assets [Line Items]    
In-process research and development impairment charges $ 112 $ 112