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General - Statement of Financial Position (Details) - USD ($) | Sep. 30, 2019 | Jul. 01, 2019 | Jan. 01, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jan. 01, 2018
--- | --- | --- | --- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred income taxes | $ 1,079,000,000 |  |  | $ 425,000,000 |  |
Other liabilities and accrued expenses | 9,729,000,000 |  |  | 7,737,000,000 |  |
Total liabilities | 94,933,000,000 |  |  | 90,937,000,000 |  |
Retained income | 46,527,000,000 |  |  | 44,033,000,000 |  |
Unrealized foreign currency translation adjustments | (50,000,000) |  |  | (49,000,000) |  |
Unrecognized pension and other postretirement benefit cost | 134,000,000 |  |  | 169,000,000 |  |
Total AOCI | 2,107,000,000 |  |  | 118,000,000 |  |
Total shareholders’ equity | 26,140,000,000 |  |  | 21,312,000,000 | $ 23,659,000,000 |
Previously reported |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred income taxes | 1,185,000,000 |  |  |  |  |
Other liabilities and accrued expenses | 9,226,000,000 |  |  |  |  |
Total liabilities | 94,536,000,000 |  |  |  |  |
Retained income | 48,406,000,000 |  |  | 45,708,000,000 |  |
Unrealized foreign currency translation adjustments | (62,000,000) |  |  | (64,000,000) |  |
Unrecognized pension and other postretirement benefit cost | (1,336,000,000) |  |  | (1,491,000,000) |  |
Total AOCI | 625,000,000 |  |  | (1,557,000,000) |  |
Total shareholders’ equity | 26,537,000,000 |  |  |  | 23,633,000,000 |
Impact of change | Impact of change |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred income taxes | (106,000,000) |  |  |  |  |
Other liabilities and accrued expenses | 503,000,000 |  |  |  |  |
Total liabilities | 397,000,000 |  |  |  |  |
Retained income | (1,879,000,000) |  |  | (1,675,000,000) |  |
Unrealized foreign currency translation adjustments | 12,000,000 |  |  | 15,000,000 |  |
Unrecognized pension and other postretirement benefit cost | 1,470,000,000 |  |  | 1,660,000,000 |  |
Total AOCI | 1,482,000,000 |  |  | $ 1,675,000,000 |  |
Total shareholders’ equity | $ (397,000,000) | $ (12,000,000) | $ (18,000,000) |  | $ 26,000,000 | $ 0

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