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SHAREOWNERS' EQUITY - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) Classes_of_Common_Stock Vote $ / shares shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) shares | May 31, 2016 USD ($)
Stockholders Equity Note [Line Items] |  |  |  |
Classes of common stock | Classes_of_Common_Stock | 2 |  |  |
Preferred stock, shares authorized | 200,000,000 |  |  |
Preferred stock, par value | $ / shares | $ 0.01 |  |  |
Preferred stock, issued | 0 |  |  |
Common stock purchases, Shares | 2,100,000 | 9,100,000 | 8,900,000 |
Total of class A and class B common stock, repurchased, value | $ | $ 217,000,000 | $ 1,000,000,000.0 | $ 1,000,000,000.0 |
Share repurchase authorized amount | $ |  |  |  | $ 8,000,000,000.0
Shares outstanding (shares) | 1,564,000 |  |  |
Share repurchase authorization remaining | $ | $ 2,100,000,000 |  |  |
Fair Value, Inputs, Level 3 |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Derivative Assets (Liabilities), at Fair Value, Net | $ | $ 0 | 0 |  |
Settled Options |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Option Premiums Received (Paid) | $ |  | $ 21,000,000 | $ 34,000,000 |
Shares outstanding (shares) | 0 |  |  |
Common Class A [Member] |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Votes per common share | Vote | 10 |  |  |
Common stock, par value | $ / shares | $ 0.01 |  |  |
Common stock, shares authorized | 4,600,000,000 |  |  |
Common Class B [Member] |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Votes per common share | Vote | 1 |  |  |
Common stock, par value | $ / shares | $ 0.01 |  |  |
Common stock, shares authorized | 5,600,000,000 |  |  |

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