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Schedule II - Condensed Financial Information of Registrant - Financial Position (Details) - USD ($) $ / shares in Units, $ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Assets |  |  |  |
Fixed income securities, at fair value (amortized cost $361 and $510) | $ 58,992 | $ 57,839 |  |
Short-term investments, at fair value (amortized cost $171 and $219) | 1,944 | 4,288 |  |
Cash | 617 | 436 | $ 495 | $ 657
Total assets | 112,422 | 108,610 |  |
Liabilities |  |  |  |
Long-term debt | 6,350 | 6,347 |  |
Total liabilities | 89,871 | 88,037 |  |
Shareholders’ equity |  |  |  |
Preferred stock and additional capital paid-in, $1 par value, 25 million shares authorized, 72.2 thousand issued and outstanding, $1,805 aggregate liquidation preference | 1,746 | 1,746 |  |
Common stock, $.01 par value, 2.0 billion shares authorized and 900 million issued, 355 million and 366 million shares outstanding | 9 | 9 |  |
Additional capital paid-in | 3,313 | 3,303 |  |
Retained income | 43,162 | 40,678 |  |
Deferred ESOP expense | (3) | (6) |  |
Treasury stock, at cost (545 million and 534 million shares) | (25,982) | (24,741) |  |
Accumulated other comprehensive income: |  |  |  |
Unrealized net capital gains and losses | 1,662 | 1,053 |  |
Unrealized foreign currency translation adjustments | (9) | (50) |  |
Unrecognized pension and other postretirement benefit cost | (1,347) | (1,419) |  |
Total accumulated other comprehensive income (loss) (“AOCI”) | 306 | (416) |  |
Total shareholders’ equity | 22,551 | 20,573 | 20,025 |
Total liabilities and shareholders’ equity | 112,422 | 108,610 |  |
Additional balance sheet disclosures: |  |  |  |
Short-term, at fair value, amortized cost (in dollars) | $ 1,944 | $ 4,288 |  |
Preferred stock, par value (in dollars per share) | $ 1 | $ 1 |  |
Preferred stock, shares authorized (in shares) | 25,000,000 | 25,000,000 |  |
Preferred stock, shares issued (in shares) | 72,200 | 72,200 |  |
Preferred stock, shares outstanding (in shares) | 72,200 | 72,200 |  |
Preferred stock, shares aggregate liquidation preference (in dollars) | $ 1,805 | $ 1,805 |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |  |
Common stock, shares authorized (in shares) | 2,000,000,000 | 2,000,000,000 |  |
Common stock, shares issued (in shares) | 900,000,000 | 900,000,000 |  |
Common stock, shares outstanding (in shares) | 355,000,000 | 366,000,000 |  |
Treasury stock, shares (in shares) | 545,000,000 | 534,000,000 |  |
Allstate Corporation |  |  |  |
Assets |  |  |  |
Investments in subsidiaries | $ 29,126 | $ 26,929 |  |
Fixed income securities, at fair value (amortized cost $361 and $510) | 362 | 513 |  |
Short-term investments, at fair value (amortized cost $171 and $219) | 171 | 219 |  |
Cash | 0 | 2 | $ 4 | $ 155
Receivable from subsidiaries | 427 | 385 |  |
Deferred income taxes | 124 | 348 |  |
Other assets | 150 | 138 |  |
Total assets | 30,360 | 28,534 |  |
Liabilities |  |  |  |
Long-term debt | 6,350 | 6,347 |  |
Pension and other postretirement benefit obligations | 675 | 1,079 |  |
Deferred compensation | 297 | 274 |  |
Notes due to subsidiaries | 250 | 0 |  |
Dividends payable to shareholders | 167 | 157 |  |
Other liabilities | 70 | 104 |  |
Total liabilities | 7,809 | 7,961 |  |
Shareholders’ equity |  |  |  |
Preferred stock and additional capital paid-in, $1 par value, 25 million shares authorized, 72.2 thousand issued and outstanding, $1,805 aggregate liquidation preference | 1,746 | 1,746 |  |
Common stock, $.01 par value, 2.0 billion shares authorized and 900 million issued, 355 million and 366 million shares outstanding | 9 | 9 |  |
Additional capital paid-in | 3,313 | 3,303 |  |
Retained income | 43,162 | 40,678 |  |
Deferred ESOP expense | (3) | (6) |  |
Treasury stock, at cost (545 million and 534 million shares) | (25,982) | (24,741) |  |
Accumulated other comprehensive income: |  |  |  |
Unrealized net capital gains and losses | 1,662 | 1,053 |  |
Unrealized foreign currency translation adjustments | (9) | (50) |  |
Unrecognized pension and other postretirement benefit cost | (1,347) | (1,419) |  |
Total accumulated other comprehensive income (loss) (“AOCI”) | 306 | (416) |  |
Total shareholders’ equity | 22,551 | 20,573 |  |
Total liabilities and shareholders’ equity | 30,360 | 28,534 |  |
Additional balance sheet disclosures: |  |  |  |
Fixed income securities, at fair value, amortized cost (in dollars) | 361 | 510 |  |
Short-term, at fair value, amortized cost (in dollars) | $ 171 | $ 219 |  |
Preferred stock, par value (in dollars per share) | $ 1 | $ 1 |  |
Preferred stock, shares authorized (in shares) | 25,000,000 | 25,000,000 |  |
Preferred stock, shares issued (in shares) | 72,200 | 72,200 |  |
Preferred stock, shares outstanding (in shares) | 72,200 | 72,200 |  |
Preferred stock, shares aggregate liquidation preference (in dollars) | $ 1,805 | $ 1,805 |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |  |
Common stock, shares authorized (in shares) | 2,000,000,000 | 2,000,000,000 |  |
Common stock, shares issued (in shares) | 900,000,000 | 900,000,000 |  |
Common stock, shares outstanding (in shares) | 355,000,000 | 366,000,000 |  |
Treasury stock, shares (in shares) | 545,000,000 | 534,000,000 |  |

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