CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Sep. 30, 2020
OPERATING ACTIVITIES
Net income	$ 66	$ 242	$ 99	$ 283
Less: Income from discontinued operations, net of tax	0	1	0	1
Income from continuing operations	66	241	99	282
Adjustments to income from continuing operations to arrive at cash provided by operating activities:
Depreciation and amortization			52	50
Deferred income tax expense (benefit)			2	(4)
Restructuring costs			8	15
Stock compensation expense			10	1
Equity in earnings of affiliates	(5)	(6)	(16)	(12)
Pension and retiree medical income			(26)	(21)
Loss on debt extinguishment			8	0
Dividends received from equity method investments			2	0
Pension and retiree medical contributions			(6)	(7)
Restructuring payments			(8)	(15)
Changes in off-balance sheet accounts receivable securitization and factoring programs			35	20
Changes in receivables, inventories and accounts payable			(63)	(8)
Changes in other current assets and liabilities			5	(49)
Changes in other assets and liabilities			5	38
Operating cash flows provided by continuing operations			107	290
Operating cash flows used for discontinued operations			0	0
CASH PROVIDED BY OPERATING ACTIVITIES			107	290
INVESTING ACTIVITIES
Capital expenditures			(26)	(33)
Cash paid for acquisition of Transportation Power, Inc., net of cash acquired			0	(13)
Other investing activities			(3)	9
CASH USED FOR INVESTING ACTIVITIES			(29)	(37)
FINANCING ACTIVITIES
Securitization			0	96
Borrowings against revolving line of credit			0	304
Proceeds from debt issuance			275	0
Redemption of notes			(281)	0
Redemption of convertible notes			(53)	0
Debt issuance costs			(5)	0
Term loan payments			(7)	(4)
Other financing activities			(1)	(1)
Net change in debt			(72)	395
Repurchase of common stock			0	(241)
CASH PROVIDED BY (USED FOR) FINANCING ACTIVITIES			(72)	154
EFFECT OF CHANGES IN FOREIGN CURRENCY EXCHANGE RATES ON CASH AND CASH EQUIVALENTS			0	(7)
CHANGE IN CASH AND CASH EQUIVALENTS			6	400
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD			315	108	$ 108
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 321	$ 508	$ 321	$ 508	$ 315