Unaudited Consolidated Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

In management's opinion, the following quarterly financial information fairly presents the results of operations for such periods and is prepared on a basis consistent with the Company's annual audited financial statements.

(In millions, except for per-share amounts)	March 31, 2017				June 30, 2017				September 30, 2017				December 31, 2017
Net premium income		$	4,638			$	4,665			$	4,648			$	4,580
Net investment income		794				802				811				812
Realized investment gains (losses)		(140		)		(56		)		30				15
Other income (loss)		17				17				17				17
Total revenues		5,309				5,428				5,506				5,424
Total benefits and expenses		4,411				4,383				4,431				4,425
Earnings before income taxes		898				1,045				1,075				999
Total income tax		306				332				359				(1,585		)
Net earnings		$	592			$	713			$	716			$	2,584
Net earnings per basic share		$	1.48			$	1.80			$	1.81			$	6.59
Net earnings per diluted share		1.47				1.79				1.80				6.54
Quarterly amounts may not agree in total to the corresponding annual amounts due to rounding.
(In millions, except for per-share amounts)	March 31, 2016				June 30, 2016				September 30, 2016				December 31, 2016
Net premium income		$	4,602			$	4,823			$	5,022			$	4,778
Net investment income		801				822				842				813
Realized investment gains (losses)		30				(223		)		(164		)		344
Other income (loss)		18				15				16				20
Total revenues		5,451				5,437				5,716				5,955
Total benefits and expenses		4,334				4,603				4,753				4,802
Earnings before income taxes		1,117				834				963				1,153
Total income tax		386				286				334				402
Net earnings		$	731			$	548			$	629			$	751
Net earnings per basic share		$	1.75			$	1.33			$	1.54			$	1.85
Net earnings per diluted share		1.74				1.32				1.53				1.84

Quarterly amounts may not agree in total to the corresponding annual amounts due to rounding.