Commitments and Contingencies (Details) - Dec. 31, 2018 $ in Millions, kr in Billions	USD ($)	SEK (kr)
Swedish Tax Agency
Loss Contingencies [Line Items]
Total assessment, including penalties and interest, not recorded	$ 379	kr 3.5

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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