XML 55 R42.htm IDEA: XBRL DOCUMENT v3.8.0.1
Recent Accounting Guidance Recent Accounting Guidance (Details) - Accounting Standards Update 2016-09 - USD ($)
$ in Millions
1 Months Ended 2 Months Ended 8 Months Ended 9 Months Ended
Sep. 30, 2017
Aug. 31, 2017
Aug. 31, 2017
Sep. 30, 2016
Predecessor        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Excess tax benefits recognized   $ 5 $ 30  
Excess Tax Benefit from Share-based Compensation, Operating Activities       $ (22)
Excess Tax Benefit from Share-based Compensation, Financing Activities       (22)
Successor        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Excess tax benefits recognized $ 0      
Cash Flows from Operating Activities | Predecessor        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Payments Related to Tax Withholding for Share-based Compensation       (28)
Cash Flows from Financing Activities | Predecessor        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Payments Related to Tax Withholding for Share-based Compensation       $ (28)