XML 119 R92.htm IDEA: XBRL DOCUMENT v3.10.0.1
Redeemable Noncontrolling Interests (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended 34 Months Ended
Sep. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2018
Aug. 26, 2015
Redeemable Noncontrolling Interest [Line Items]            
Ownership interest (as a percent) 98.00%          
Noncontrolling interest decrease from redemptions or purchase of interests percent 16.00%          
Redeemable Noncontrolling Interest, Equity, Other, Redemption Value   $ 19 $ 1 $ (7) $ 103  
Redeemable Noncontrolling Interest, Equity, Redemption Value   109     $ 109  
naviHealth [Member]            
Redeemable Noncontrolling Interest [Line Items]            
Ownership interest (as a percent)     82.00% 82.00%   71.00%
Fair value of redeemable noncontrolling interests           $ 119
Redeemable Noncontrolling Interest, Equity, Other, Redemption Value   $ 103 $ 3