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Subsequent Events (Details) - OSLO BORS ASA - Scenario, Forecast $ / shares in Units, kr in Millions, $ in Millions	1 Months Ended
	Mar. 04, 2019 USD ($)	Mar. 04, 2019 NOK (kr)	Jan. 29, 2019 $ / shares
Subsequent Event [Line Items]
NOK per share offering (in NOK per share)			$ 152
Interest rate on offer price	6.00%	6.00%
Purchase Consideration	$ 770	kr 6,537
Required percentage of votes for approval, minimum	90.00%	90.00%

X

- Definition

Business Acquisitions, Required Votes For Approval, Percentage. Minimum

+ References

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- Definition

Business Combinations, Interest Rate On Offer Price Payments

+ References

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- Definition

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

+ References

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X

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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