The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Goodwill and Other Intangibles - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Finite-Lived Intangible Assets, Net [Abstract]
Intangibles amortization expense	$ 24	$ 22	$ 47	$ 43
Expected future amortization expense [Abstract]
2022 (includes six months actual and six months estimated)	95		95
2023	95		95
2024	81		81
2025	76		76
2026	$ 72		$ 72
Minimum [Member] \| Trademarks and Trade Names [Member]
Intangible Assets, Net [Abstract]
Useful life (in years)			3 years
Minimum [Member] \| Intellectual Property [Member]
Intangible Assets, Net [Abstract]
Useful life (in years)			5 years
Minimum [Member] \| Customer and Supplier Relationships [Member]
Intangible Assets, Net [Abstract]
Useful life (in years)			3 years
Maximum [Member] \| Trademarks and Trade Names [Member]
Intangible Assets, Net [Abstract]
Useful life (in years)			25 years
Maximum [Member] \| Intellectual Property [Member]
Intangible Assets, Net [Abstract]
Useful life (in years)			25 years
Maximum [Member] \| Customer and Supplier Relationships [Member]
Intangible Assets, Net [Abstract]
Useful life (in years)			24 years