FAIR VALUE MEASUREMENTS (Details) - USD ($)	Dec. 31, 2017	Sep. 30, 2017
Assets:
Marketable securities held in Trust Account	$ 461,549,163	$ 461,069,825
Recurring \| Level 1
Assets:
Marketable securities held in Trust Account	$ 461,549,163

- Definition

Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale which are intended to be held for greater than one year or the normal operating cycle, whichever is longer and that are pledged to one or more secured parties who have the right to buy, sell, or re-pledge the collateral.

+ References + Details