XML 83 R65.htm IDEA: XBRL DOCUMENT v3.8.0.1
Commitments And Contingencies (Financing Commitments) (Details) - Financing Commitment [Member] - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Financing Commitments [Line Items]    
April through December 2018 $ 1,354  
2018 2,960  
2019 1,699  
2020 1,632  
2021 994  
Thereafter 1,399  
Total $ 10,038 $ 10,221