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Schedule II Schedule II (STATEMENTS OF OPERATIONS - Parent Company Only) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity in net income of subsidiaries and affiliates |  |  |  |  |  |  |  |  | $ 514 | $ 418 | $ 264
Total revenues | $ 7,626 | $ 8,750 | $ 8,510 | $ 7,831 | $ 8,015 | $ 8,610 | $ 8,108 | $ 7,510 | 32,717 | 32,243 | 31,469
Administrative and other (income) expense |  |  |  |  |  |  |  |  | 2,886 | 2,833 | 3,081
Business Combination, Integration Related Costs |  |  |  |  |  |  |  |  | 59 | 310 | 492
Income tax expense (benefit) |  |  |  |  |  |  |  |  | 695 | (139) | 815
Total expenses |  |  |  |  |  |  |  |  | 28,060 | 28,521 | 26,519
Net income | $ 355 | $ 1,231 | $ 1,294 | $ 1,082 | $ 1,533 | $ (70) | $ 1,305 | $ 1,093 | 3,962 | 3,861 | 4,135
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  | 1,242 |  |
Chubb limited (Parent Guarantor) |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Investment income, including intercompany interest income |  |  |  |  |  |  |  |  | 305 | 336 | 356
Equity in net income of subsidiaries and affiliates |  |  |  |  |  |  |  |  | 3,753 | 3,640 | 3,901
Total revenues |  |  |  |  |  |  |  |  | 4,058 | 3,976 | 4,257
Administrative and other (income) expense |  |  |  |  |  |  |  |  | 63 | 63 | 39
Business Combination, Integration Related Costs |  |  |  |  |  |  |  |  | 14 | 32 | 62
Income tax expense (benefit) |  |  |  |  |  |  |  |  | 19 | 20 | 21
Total expenses |  |  |  |  |  |  |  |  | 96 | 115 | 122
Net income |  |  |  |  |  |  |  |  | 3,962 | 3,861 | 4,135
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  | $ 1,242 | $ 4,718 | $ 4,556

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