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Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 1,286	$ 1,339
Foreign currency translation	(53)
Gross goodwill	4,173
Accumulated impairment	(2,887)
Commercial:
Goodwill [Line Items]
Goodwill	628	661
Foreign currency translation	(33)
Gross goodwill	2,181
Accumulated impairment	(1,553)
Government Services:
Goodwill [Line Items]
Goodwill	610	617
Foreign currency translation	(7)
Gross goodwill	1,364
Accumulated impairment	(754)
Transportation:
Goodwill [Line Items]
Goodwill	48	$ 61
Foreign currency translation	(13)
Gross goodwill	628
Accumulated impairment	$ (580)

X

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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