XML 107 R97.htm IDEA: XBRL DOCUMENT v3.7.0.1
Commitments and Contingencies - Additional Information (Detail) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Jun. 30, 2017
Sep. 30, 2016
Loss Contingencies [Line Items]    
Estimated asbestos related net liability on a discounted basis $ 147 $ 148
Reserves for environmental liabilities 48 51
Conditional asset retirement obligations 72 74
Accrued Environmental Loss Contingencies, Current 12  
Accrued Environmental Loss Contingencies, Noncurrent 36  
Liability for Asbestos and Environmental Claims, Gross 535 548
Restricted Cash and Investments 388 400
Restricted Cash and Cash Equivalents 37 88
Insurance Recoveries 96 120
Insurable liabilities 488 422
Insurance Settlements Receivable, Current 30  
Insurance Settlements Receivable 49  
Insurance Settlements Receivable, Noncurrent 19 21
Asbestos Issue [Member]    
Loss Contingencies [Line Items]    
Restricted Cash and Cash Equivalents 28 16
Restricted Investments 264 264
Accrued Compensation and Benefits [Member]    
Loss Contingencies [Line Items]    
Insurable liabilities 30 28
Other Current Assets    
Loss Contingencies [Line Items]    
Restricted Cash and Investments 52 41
Other Noncurrent Assets    
Loss Contingencies [Line Items]    
Restricted Cash and Investments 336 359
Other Noncurrent Liabilities [Member]    
Loss Contingencies [Line Items]    
Liability for Asbestos and Environmental Claims, Gross 500 513
Insurable liabilities 372 334
Other Current Liabilities    
Loss Contingencies [Line Items]    
Liability for Asbestos and Environmental Claims, Gross 35 35
Insurable liabilities $ 86 $ 60