Commitments And Contingencies (Commitments and Contingencies, other disclosures) (Details)			1 Months Ended		6 Months Ended
	May. 04, 2016 USD ($)	Feb. 28, 2016 USD ($)	Feb. 29, 2016 USD ($)	Sep. 30, 2014 USD ($)	Mar. 31, 2016 USD ($) plaintiffs	Sep. 30, 2015 USD ($)
Loss Contingencies [Line Items]
Product Warranty Maximum Duration					2 years
Letters of credit backing surety bonds, amount					$ 78,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Value of Shares Authorized					60,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Value of Shares Outstanding					21,000,000
Surety Bond
Loss Contingencies [Line Items]
Maximum potential payout under surety bonds					85,000,000
Indemnification Agreement
Loss Contingencies [Line Items]
Threshold amount of Contribution And Distribution Agreement					$ 50,000,000
Minimum | Surety Bond
Loss Contingencies [Line Items]
Surety bonds duration					3 months
Maximum | Surety Bond
Loss Contingencies [Line Items]
Surety bonds duration					3 years
Standby Letters of Credit
Loss Contingencies [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 145,000,000
Antitrust Litigation
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value					20,000,000
Loss Contingency, Damages Awarded, Value Trebled					$ 60,000,000
Hazardous Noise Exposure Litigation By Former Employees
Loss Contingencies [Line Items]
Litigation, number of plaintiffs | plaintiffs					101
Hazardous Noise Exposure Litigation By Former Employees | Maximum
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value					$ 50,000
Pending Litigation | Antitrust Litigation
Loss Contingencies [Line Items]
Loss Contingency, Actions Taken by Plaintiff					3
Litigation Settlement, Amount			$ (8,000,000)
Loss Contingency, Damages Sought, Value		$ 71,000,000
Supersedeas bond, value					$ 70,000,000
Settled Litigation | Antitrust Litigation
Loss Contingencies [Line Items]
Litigation Settlement, Amount				$ (63,000,000)
Secured Debt [Member] | Senior Secured Multi-Currency Asset-Based Revolver [Member]
Loss Contingencies [Line Items]
Long-term Line of Credit					$ 122,000,000	$ 119,000,000
Subsequent Event [Member] | Settled Litigation | Copyright Infringement Litigation [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Amount	$ 51,000,000