XML 128 R37.htm IDEA: XBRL DOCUMENT v3.19.3
Recent Accounting Pronouncements and Accounting Changes (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                  
Lease liabilities $ 47                
Finance lease obligations $ 67                
Estimated time until next turnaround occurs 4 years                
Total assets $ 3,962     $ 4,079 $ 4,000        
Total equity $ 1,725 $ 1,707 $ 1,659   1,943 $ 1,948 $ 1,783 $ 1,849 $ 1,823
Effect of Turnaround Accounting Change | Effect of Turnaround Accounting Change                  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                  
Total assets         93        
Total equity         $ 75        
Topic 842                  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                  
ROU assets       56          
Lease liabilities       56          
Finance lease asset       26          
Finance lease obligations       23          
Total assets       $ 79