XML 47 R35.htm IDEA: XBRL DOCUMENT v3.10.0.1
Revenue Recognition Accounting Policy (Details 3) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Jan. 01, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Total Revenues $ 1,391 $ 1,436 $ 4,130 $ 4,301  
Deferred Revenue $ 395   395   $ 392
Deferred Revenue, Revenue Recognized     (47)    
Deferred Revenue, Additions     $ 61