Discontinued Operations Disposal Group - Assets Held For Sale (Details) - USD ($) $ in Millions	Dec. 31, 2021	Sep. 30, 2021
Building Solutions Asia Pacific \| Individually immaterial disposal group [Domain]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Assets	$ 159	$ 156

Amount classified as assets attributable to disposal group held for sale or disposed of.

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