Stockholders' Equity and Statutory Accounting Practices (Tables)

12 Months Ended

Dec. 31, 2017

Stockholders' Equity and Statutory Accounting Practices [Abstract]

Combined statutory capital and surplus and net income (loss)

Combined statutory capital and surplus and statutory net income (loss) for the Combined Continental Casualty Companies are presented in the table below, determined in accordance with accounting practices prescribed or permitted by insurance and/or other regulatory authorities

	Statutory Capital and Surplus				Statutory Net Income (Loss)
	December 31				Years ended December 31
(In millions)	2017 (1)		2016		2017 (1)		2016		2015
Combined Continental Casualty Companies	$	10,726	$	10,748	$	1,029	$	1,033	$	1,148

(1) Information derived from the statutory-basis financial statements to be filed with insurance regulators.