Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

(In millions, except per share amounts)				Three Months Ended
	March 31		June 30			Sept. 30			Dec. 31
Consolidated Results
2015
Total revenues	$	9,467	$	9,492		$	9,389		$	9,528
Income before income taxes		854		936			878			659
Shareholders' net income		533		588	⁽¹⁾		547	⁽²⁾		426	⁽²⁾
Shareholders' net income per share:	1
Basic		2.08		2.30			2.14			1.66
Diluted		2.04		2.26			2.10			1.64
2014
Total revenues	$	8,496	$	8,733		$	8,757		$	8,928
Income before income taxes		853		901			818			732
Shareholders' net income		528		573			534			467
Shareholders' net income per share:	1
Basic		1.96		2.16			2.04			1.80
Diluted		1.92		2.12			2.01			1.77
Stock and Dividend Data
2015
Price range of common stock — high	$	131.13	$	170.63		$	166.19		$	148.51
— low	$	100.68	$	124.30		$	125.61		$	127.51
Dividends declared per common share	$	0.04	$	-		$	-		$	-
2014
Price range of common stock — high	$	90.63	$	93.20		$	97.28		$	105.73
— low	$	75.37	$	73.47		$	87.33		$	85.75
Dividends declared per common share	$	0.04	$	-		$	-		$	-

(1) Shareholders' net income includes an after-tax charge of $65 million for the early extinguishment of debt in the second quarter of 2015. See Note 15 to the Consolidated Financial Statements for additional details.

(2) Shareholders' net income includes after-tax charges of $29 million in the third quarter of 2015 and $28 million in the fourth quarter of 2015 for advisory, legal and other transactions costs directly related to the Company's proposed merger with Anthem. See Note 3 to the Consolidated Financial Statements for additional details