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Stockholders' Equity (Narrative) (Detail) $ / shares in Units, shares in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) $ / shares shares | Jun. 30, 2019 USD ($)
Stockholders Equity [Line Items] |  |  |  |
Currency translation adjustments (net of tax of $4, $4, $0, and $(2) respectively) | $ 39,000,000 | $ 9,000,000 | $ (44,000,000) | $ 10,000,000
Other Comprehensive Income Unrealized Gain Loss On Cash Flow Hedges Arising During Period Net Of Tax |  |  | (28,000,000) | (19,000,000)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax |  |  | 2,000,000 | (2,000,000)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax |  |  | (26,000,000) | (21,000,000)
Stockholders' Equity Note [Abstract] |  |  |  |
Option Premiums Paid |  | $ (16,000,000) |  | $ (16,000,000)
Open Option Contracts Written, Number of Shares |  | 600,000 |  | 600,000
Stock Repurchase Program, Authorized Amount | 1,800,000,000 |  | $ 1,800,000,000 |
Stock Repurchased During Period, Shares | shares |  |  | 5.0 |
Stock Repurchased During Period, Value |  |  | $ 113,000,000 |
Stock Repurchased During Period, Average Price | $ / shares |  |  | $ 22.49 |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 76,000,000 |  | $ 76,000,000 |
Proceeds from Issuance of Common Stock |  |  | $ 15,000,000 | $ 0

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- Definition The number of shares for the open option contracts written on the investment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13(Column C)(Footnote 5)) -URI http://asc.fasb.org/extlink&oid=120401592&loc=d3e611282-123010 + Details
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