XML 45 R31.htm IDEA: XBRL DOCUMENT v3.10.0.1
Revenue Recognition, Performance Obligations (Details)
$ in Millions
Sep. 30, 2018
USD ($)
Performance Obligations [Abstract]  
Performance obligations expected to be satisfied $ 599
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01  
Performance Obligations [Abstract]  
Revenue, remaining performance obligation, expected timing of satisfaction, period 24 months