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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 For the Years Ended December 31, 2019, 2018 and 2017
|  | (In Millions) |
Column A |  | Column B |  | Column C |  |  | Column D |  |  | Column E
|  |  |  | Additions |  |  |  |  |  |
Description |  | Balance at Beginning of Period |  | Charged to Costs and Expenses |  | Charged to Other Accounts |  |  | Deductions |  |  | Balance at End of Period
Allowances for doubtful accounts, deducted from accounts receivable in the balance sheet (d): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 |  | $ | 5 |  |  | $ | 1 |  |  | $ | — |  |  |  | $ | (2 | ) |  | (a) | $ | 4 |
2018 |  | $ | 4 |  |  | $ | 3 |  |  | $ | — |  |  |  | $ | (2 | ) |  | (a) | $ | 5 |
2017 |  | $ | 5 |  |  | $ | 1 |  |  | $ | — |  |  |  | $ | (2 | ) |  | (a) | $ | 4 |
Valuation allowance on deferred tax assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 |  | $ | 43 |  |  | $ | — |  |  | $ | — |  |  |  | $ | (5 | ) |  | (b) | $ | 38 |
2018 |  | $ | 47 |  |  | $ | — |  |  | $ | — |  |  |  | $ | (4 | ) |  | (c) | $ | 43 |
2017 |  | $ | 45 |  |  | $ | — |  |  | $ | 2 |  |  | (d) | $ | — |  |  |  | $ | 47 |
(a) | Deductions, representing uncollectible accounts written off, less recoveries of accounts written off in prior years.
(b) | $5 million net reduction to valuation allowance recorded as an income tax benefit.
(c) | $3 million net reduction to valuation allowance recorded as an income tax benefit and $1 million reduction recorded primarily in other comprehensive income (loss).
(d) $2 million adjustment to the valuation allowance was recorded primarily in other comprehensive income (loss).

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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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