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SHAREOWNERS' EQUITY - Additional Information (Detail) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 USD ($) option Vote $ / shares shares | Jun. 30, 2018 USD ($) shares | Jun. 30, 2019 USD ($) option Vote Classes_of_Common_Stock $ / shares shares | Jun. 30, 2018 USD ($) shares | May 01, 2016 USD ($)
Stockholders Equity Note [Line Items] |  |  |  |  |
Classes of Common Stock, Number | Classes_of_Common_Stock |  |  | 2 |  |
Preferred stock, shares authorized | shares | 200,000,000 |  | 200,000,000 |  |
Preferred stock, par value | $ / shares | $ 0.01 |  | $ 0.01 |  |
Preferred stock, issued | shares | 0 |  | 0 |  |
Common stock authorized for purchase, amount |  |  |  |  | $ 8,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 2,837 |  | $ 2,837 |  |
Change in non-controlling minority interest | $ 0 | $ (3) | $ 2 | $ (2) |
Class A common stock |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Votes per common share | Vote | 10 |  | 10 |  |
Common stock, par value | $ / shares | $ 0.01 |  | $ 0.01 |  |
Common stock, shares authorized | shares | 4,600,000,000 |  | 4,600,000,000 |  |
Class B common stock |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Votes per common share | Vote | 1 |  | 1 |  |
Common stock, par value | $ / shares | $ 0.01 |  | $ 0.01 |  |
Common stock, shares authorized | shares | 5,600,000,000 |  | 5,600,000,000 |  |
Class A and B Common Stock |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Total of Class A and Class B common stock, repurchased, value | $ 251 | $ 256 | $ 502 | $ 511 |
Common stock purchases | shares | 2,400,000 | 2,200,000 | 4,800,000 | 4,400,000 |
Options Held [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Option premiums received | $ 6 | $ 20 | $ 1 | $ 19 |
Number of options open | option | 200,000 |  | 200,000 |  |
Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share | $ / shares |  |  | $ 93.69 |  |
Net Income [Member] [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
TotalOtherComprehensiveIncomeReclassification, Net of Tax | $ (16) | (58) | $ (46) | (134) |
Unrealized gain (loss) on cash flow hedges, net of tax: |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax | (9) | 6 | (13) | 18 |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | (27) | 20 | 40 | (56) |
Unrealized gain (loss) on cash flow hedges, net of tax: | Income Tax Expense Benefit [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax | (9) | 6 | (13) | 18 |
Unrealized gain (loss) on cash flow hedges, net of tax: | Net Income [Member] [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | 27 | (20) | 40 | (56) |
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Reclassification to earnings (net of tax effect of $_ and $12) |  |  | 0 | (609) |
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Income Tax Expense Benefit [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax | 14 | 12 | 27 | 24 |
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Net Income [Member] [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Reclassification to earnings (net of tax effect of $_ and $12) | (43) | (38) | (86) | (77) |
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Labor and Related Expense [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | (57) | (50) | (113) | (101) |
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax | 0 | 0 | 0 | 1 |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax |  |  | 0 | (1) |
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] | Income Tax Expense Benefit [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax | 0 | 0 | 0 | 1 |
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] | Net Income [Member] [Member] |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax | 0 | 0 | 0 | (1) |
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] | Investment income and other |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax | 0 | 0 | 0 | (2) |
Foreign Exchange Contract [Member] | Unrealized gain (loss) on cash flow hedges, net of tax: | Interest Expense |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax | 39 | (20) | 62 | (62) |
Interest Rate Contract [Member] | Unrealized gain (loss) on cash flow hedges, net of tax: | Interest Expense |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax | $ (3) | $ (6) | $ (9) | $ (12) |

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