XML 103 R90.htm IDEA: XBRL DOCUMENT v3.19.2
Pension and Other Postretirement Benefits-Defined Benefit (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]      
Accumulated other comprehensive loss transferred from 21CF, net of tax $ 157    
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Assets received from 21CF 630 $ 0  
Liabilities assumed from 21CF 765 0  
Accumulated other comprehensive loss transferred from 21CF 188    
Accumulated other comprehensive loss transferred from 21CF, net of tax 143    
Accumulated benefit obligation 1,113 311  
Fair value of plan assets $ 800 70 $ 70
Pension Benefits | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations (percentage) 50.00%    
Pension Benefits | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations (percentage) 25.00%    
Pension Benefits | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 27    
Defined Benefit Plan, Target Plan Asset Allocations (percentage) 25.00%    
Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Assets received from 21CF $ 0 0  
Liabilities assumed from 21CF 98 0  
Accumulated other comprehensive loss transferred from 21CF 18    
Accumulated other comprehensive loss transferred from 21CF, net of tax 14    
Fair value of plan assets $ 0 $ 0 $ 0