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Goodwill (Tables) | 6 Months Ended
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Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill |
(in millions) |  | Commercial Industries |  | Government Services |  | Transportation |  | Total
Balance at December 31, 2020 |  | $ | 837 |  |  | $ | 623 |  |  | $ | 68 |  |  | $ | 1,528 |
Foreign currency translation |  | (4) |  |  | (3) |  |  | (2) |  |  | (9) |
Balance at June 30, 2021 |  | $ | 833 |  |  | $ | 620 |  |  | $ | 66 |  |  | $ | 1,519 |
Gross goodwill |  | $ | 2,386 |  |  | $ | 1,374 |  |  | $ | 646 |  |  | $ | 4,406 |
Accumulated impairment |  | (1,553) |  |  | (754) |  |  | (580) |  |  | (2,887) |
Balance at June 30, 2021 |  | $ | 833 |  |  | $ | 620 |  |  | $ | 66 |  |  | $ | 1,519 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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