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Financial Instruments - Effect of Interest Rate Swaps on Results of Operations (Detail) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain Recognized in OCI on Derivatives, Net of Tax | $ 4 | $ 1
Interest Rate Swaps [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain Recognized in OCI on Derivatives, Net of Tax | 3 |
Interest Rate Swaps [Member] | Reclassification out of Accumulated Other Comprehensive Income into Operations [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Interest rate swaps | $ 2 |

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