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Stockholders' Equity - Additional Information (Detail) - USD ($) shares in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 07, 2017 | Jan. 27, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jan. 24, 2017
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Stock repurchase program, remaining authorized amount |  |  | $ 717,500,000 |  |  |
Repurchase of common stock |  |  | $ 2,274,000,000 | $ 42,500,000 | $ 183,700,000 |
Shares repurchased (shares) |  |  | 7.3 | 0.2 | 1.1 |
Aggregate reduction in common stock and additional paid-in capital during stock repurchases |  |  | $ 152,000,000 | $ 4,100,000 | $ 16,300,000 |
Amount charged to retained earnings during stock repurchases |  |  | 2,122,000,000 | $ 38,400,000 | $ 167,400,000 |
Goldman | ASR Program |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Repurchase of common stock | $ 274,000,000 | $ 2,000,000,000 |  |  |  |
Shares repurchased (shares) |  | 7.3 |  |  |  |
Payment amount divided by closing price, percent |  | 80.00% |  |  |  |
Common stock |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  | 6,200,000,000.0 |  |  |
Stock repurchase program, increased to authorized amount |  |  | $ 3,000,000,000 |  |  |
Common stock | Goldman | ASR Program |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  | $ 2,000,000,000.0

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