XML 112 R89.htm IDEA: XBRL DOCUMENT v3.10.0.1
Share-Based Compensation - Liability-Classified Awards (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Jan. 01, 2018
Performance Shares [Member] | Award Year 2018, Payable 2019, 2020 and 2021 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Units 3,959,647  
Fair value $ 11 $ 12
Vested Liability $ 0  
Performance Shares [Member] | Award Year 2017, Payable 2020 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Units 1,217,774  
Fair value $ 3 8
Vested Liability $ 1  
Performance Shares [Member] | Award Year 2016, Payable 2019 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Units 2,348,893  
Fair value $ 6 10
Vested Liability $ 4  
Cash Restricted Stock Units [Member] | Award Year 2018, Payable 2019, 2020 and 2021 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Units 15,189,197  
Fair value $ 32 $ 46
Vested Liability $ 0