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Acquisitions and Divestiture (2019 Acquisition) (Details) - Cinnober
$ in Millions
1 Months Ended
Feb. 22, 2019
Dec. 31, 2018
kr / shares
Dec. 31, 2018
USD ($)
Business Acquisition [Line Items]      
SEK per share offering (in SEK per share)   kr 87  
SEK per warrant offering (in SEK per warrant)   kr 121  
Payments to acquire businesses | $     $ 220
Scenario, Forecast      
Business Acquisition [Line Items]      
Ownership percentage before transaction 99.60%    
Ownership percentage after transaction 100.00%