XML 79 R65.htm IDEA: XBRL DOCUMENT v3.19.2
Summary of Significant Accounting Policies, Leases (Details)
$ in Millions
Mar. 31, 2019
USD ($)
New Accounting Pronouncements Not Yet Adopted [Abstract]  
Deferred rent $ 2
ASU 2016-02 [Member] | Plan [Member]  
New Accounting Pronouncements Not Yet Adopted [Abstract]  
Lease liabilities 53
Right-of-use assets $ 51