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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts | Schedule II – Valuation and Qualifying Accounts (in millions)
Additions/(deductions) | Balance at beginning of year |  | Net charges to income |  | Deductions and other 1 |  | Balance at end of year
Year ended December 31, 2019 |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 34 |  |  | $ | 17 |  |  | $ | (17 | ) |  | $ | 34 |
Year ended December 31, 2018 |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 33 |  |  | $ | 21 |  |  | $ | (20 | ) |  | $ | 34 |
Year ended December 31, 2017 |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 28 |  |  | $ | 15 |  |  | $ | (11 | ) |  | $ | 33 |
1 Primarily includes uncollectible accounts written off, net of recoveries, impact of acquisitions and divestitures and adjustments for foreign currency translation.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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