Goodwill and Other Intangible Assets - Goodwill (Details)	3 Months Ended
	Dec. 31, 2018 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 2,182,000,000
Goodwill, ending balance	2,175,000,000
Seating
Goodwill [Roll Forward]
Goodwill, beginning balance	2,182,000,000
Currency translation and other	(7,000,000)
Goodwill, ending balance	2,175,000,000
SS&M
Goodwill [Roll Forward]
Goodwill, beginning balance	0
Goodwill, ending balance	0
Interiors
Goodwill [Roll Forward]
Goodwill, beginning balance	0
Goodwill, ending balance	$ 0