Equity Method Investments - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 47	$ 44
Undistributed earnings from affiliates	$ 42	$ 39
Corporate Joint Venture \| Cummins
Schedule of Equity Method Investments [Line Items]
Interest in joint ventures (in percent)	50.00%

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

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- Definition

Amount of consolidated retained earnings that represent undistributed (not yet received) earnings from 50% or less owned persons accounted for by the equity method (equity method investees).

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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