Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

2018 Quarter Ended	Dec. 31			Sept. 30		June 30		March 31
(In millions, except per share data)
Total revenues	$	3,287		$	3,608	$	3,590	$	3,581
Net income (loss) (a)		(165	)		278		230		293
Per share-basic and diluted		(0.53	)		0.88		0.72		0.89
2017 Quarter Ended
Total revenues (b)	$	3,555		$	3,521	$	3,359	$	3,300
Net income (c)		481			157		231		295
Per share-basic		1.43			0.46		0.69		0.88
Per share-diluted		1.43			0.46		0.69		0.87

The sum of the quarterly per share amounts may not equal per share amounts reported for year-to-date periods. This is due to changes in the number of weighted average shares outstanding and the effects of rounding for each period.

(a) Net loss for the fourth quarter of 2018 includes a loss on limited partnership and common stock investments of $97 million (after tax and noncontrolling interests), catastrophe losses of $96 million (after tax and noncontrolling interests) and net investment losses of $57 million (after tax).

(b) Prior period amounts have not been adjusted under the modified retrospective method of adoption of ASU 2014-09 or under the adoption of ASU 2016-01. See Note 1 for more information on these accounting standards.

(c) Net income for the fourth quarter of 2017 includes the impact of a $200 million net benefit resulting from the enactment of the Tax Act.