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Stockholders' Equity (Components Of Other Comprehensive Income) (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Equity [Abstract] |  |
Net loss | $ (87) | $ (107)
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Document Fiscal Year Focus | 2018 |
Currency translation adjustments (net of tax of $5 and $3, respectively) (b) | $ 1 | 25
Net unrealized gain (loss) on available-for-sale securities (net of tax of $0 and $0, respectively) | 0 | 0
Net unrealized gain (loss) on cash flow hedges (net of tax of $(2) and $0, respectively) | 6 | 1
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | 1 | 2
Other comprehensive income (loss) | 8 | 28
Total comprehensive income (loss) | $ (79) | (79)
Document Period End Date | Mar. 31, 2018 |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | $ 0 | 1
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax | 5 | 3
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax | 0 | 0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax | (2) | 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax | (1) | (1)
Corporate Interest Expense [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax | 1 |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | 1 |
Selling, General and Administrative Expenses [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | 2 |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax | 1 |
Including Beginning Balance Adjustment due to Cumulative Effect of Accounting Change [Member] |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Other comprehensive income (loss) | $ 8 | $ 28

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