Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2021	Sep. 30, 2020
Assets, Current [Abstract]
Cash and cash equivalents	$ 226	$ 760
Receivables, Net, Current	490	433
Inventories, net	247	199
Prepaid expenses and other current assets	53	46
Total current assets	1,016	1,438
Noncurrent assets
Property, plant and equipment, net	773	613
Operating Lease, Right-of-Use Asset	311	261
Goodwill and intangibles, net	773	529
Equity method investments	47	44
Deferred income taxes	10	34
Other Assets, Noncurrent	119	132
Total noncurrent assets	2,033	1,613
Total assets	3,049	3,051
Current liabilities
Current portion of long-term debt	2	0
Trade and other payables	216	189
Accrued expenses and other liabilities	289	255
Total current liabilities	507	444
Noncurrent liabilities
Long-term debt	1,691	1,962
Employee benefit obligations	272	317
Operating lease liabilities, noncurrent	276	231
Other noncurrent liabilities	280	173
Total noncurrent liabilities	2,519	2,683
Commitments and contingencies
Stockholders’ equity (deficit)
Preferred stock, no par value, 40 shares authorized; no shares issued and outstanding	0	0
Common stock, par value $0.01 per share, 400 shares authorized; 181 and 185 shares issued and outstanding at June 30, 2021 and September 30, 2020, respectively	2	2
Paid-in capital	32	24
Retained deficit	(29)	(110)
Accumulated other comprehensive income	18	8
Total stockholders’ equity (deficit)	23	(76)
Total liabilities and stockholders’ equity (deficit)	$ 3,049	$ 3,051