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Goodwill and Other Intangible Assets Narrative (Details)
$ / shares in Units, $ in Millions
5 Months Ended 12 Months Ended
May 01, 2017
Sep. 30, 2017
segment
Dec. 31, 2017
USD ($)
$ / shares
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Finite-Lived Intangible Assets [Line Items]          
Number of operating segments | segment   1      
Brand transition period 3 years        
Amortization and impairment of intangible assets     $ 704 $ 157 $ 173
Tradenames          
Finite-Lived Intangible Assets [Line Items]          
Useful life of finite-lived intangible assets 3 years        
Discontinued Operations | Tempo Business | Tradenames          
Finite-Lived Intangible Assets [Line Items]          
Impairment of intangible assets associated with divested business     380    
Additional amortization expense     $ 116    
Additional amortization (in dollars per share) | $ / shares     $ 0.44