Subsequent Events (Details) - Subsequent Event [Member] $ / shares in Units, $ in Billions |
Nov. 02, 2018
USD ($)
$ / shares
|
---|---|
Subsequent Event [Line Items] | |
Business Combination, Cash Consideration | 500 |
Business Combination, Share Consideration Per Share | 0.0444 |
Restricted Cash and Investments, Current | $ 1.6 |
NEX [Member] | |
Subsequent Event [Line Items] | |
Business combination, price in foreign currency | 11.28 |
Exchange Rate | 1.30 |
Business combination, purchase price | $ 5.6 |
CMEGroup [Member] | |
Subsequent Event [Line Items] | |
Business Acquisition, Share Price | $ / shares | $ 183.75 |