Disposal Groups, Discontinued Operations and Impairment of Long-Lived Assets - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended		12 Months Ended
	Feb. 28, 2011	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Jan. 31, 2015
Gain on derecognition of noncontrolling interest			$ 5,000,000
Proceeds from sale of business				$ 9,000,000
Impairment of long-lived assets		$ 36,000,000	$ 36,000,000
Customer Relationships [Member]
Intangible asset, useful life			7 years
SIFCO S.A. [Member]
Payments to acquire business	$ 150,000,000
Sales from parts purchased					$ 225,000,000
Fixed asset, useful life			10 years
Impairment of long-lived assets		$ 36,000,000
SIFCO S.A. [Member] | Customer Relationships [Member]
Intangible asset, useful life			10 years
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Credit to other comprehensive loss related to disposal group			$ 10,000,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Operations In Venezuela [Member]
No consideration received from divestiture of disposal group						$ 0
Loss on disposal group held for sale					$ 80,000,000
Gain on derecognition of noncontrolling interest			5,000,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Operations In Venezuela [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Credit to other comprehensive loss related to disposal group			10,000,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Operations In Venezuela [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest [Member]
Credit to other comprehensive loss related to disposal group			$ 1,000,000
Discontinued Operations, Disposed of by Sale [Member] | Structural Products [Member]
Proceeds from sale of business				9,000,000
Charge to other expense within discontinued operations				$ 1,000,000