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Stockholders' Equity - Additional Information (Detail) shares in Millions, $ in Millions | 6 Months Ended | 12 Months Ended | 36 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 USD ($) shares | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2019 USD ($) shares
Stockholders Equity [Line Items] |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  | $ 1,800 |  |  | $ 1,800
Treasury Stock, Shares, Acquired | shares |  |  |  |  | 14.0
Treasury Stock, Value, Acquired, Cost Method |  | 62 | $ 200 | $ 200 | $ 462
Option Premiums Paid | $ 16 |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  | 189 |  |  | $ 189
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax |  | (3) | (2) | 2 |
Less: Pension and post-retirement benefits reclassified to earnings, net of tax of $(2), $(1) and $(6), respectively |  | (6) | (5) | (5) |
Open Option Contracts Written, Number of Shares | shares | 0.6 |  |  |  |
Designated as Hedging Instrument | Foreign Exchange Forward [Member] |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax |  | 17 | 24 | (50) |
Corporate Interest Expense [Member] |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax |  | 4 | 3 | 4 |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax |  | $ 3 | $ 2 | $ 2 |

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