Segment Information (Tables)

12 Months Ended

Dec. 31, 2014

Segment Information [Abstract]

Summarized Segment Financial Information [Text Block]

(In millions)	2014		2013		2012
Global Health Care
Premiums:
Guaranteed cost	$	4,600	$	4,463	$	4,256
Experience-rated		2,322		2,292		2,022
Stop loss		2,318		1,907		1,672
International health care		1,827		1,752		1,648
Dental		1,257		1,139		1,005
Medicare		5,660		5,639		4,969
Medicaid		515		317		207
Medicare Part D		1,405		1,387		1,421
Other		805		730		677
Total premiums		20,709		19,626		17,877
Feesand other revenues		4,005		3,518		3,321
Mail order pharmacy revenues		2,239		1,827		1,623
Net investment income		337		325		259
Segment revenues	$	27,290	$	25,296	$	23,080
Depreciation and amortization	$	513	$	529	$	516
Income taxes	$	1,035	$	822	$	793
Segment earnings	$	1,646	$	1,517	$	1,418

(In millions)	2014		2013		2012
Global Supplemental Benefits
Premiums	$	2,844	$	2,496	$	1,975
Fees and other revenues		52		43		30
Net investment income		109		100		90
Segment revenues	$	3,005	$	2,639	$	2,095
Depreciation and amortization	$	50	$	50	$	29
Income taxes	$	48	$	50	$	36
Equity in income of investees	$	18	$	17	$	10
Segment earnings	$	230	$	175	$	142
Group Disability and Life
Premiums:
Life	$	1,629	$	1,552	$	1,426
Disability		1,681		1,539		1,348
Other		239		257		270
Total		3,549		3,348		3,044
Fees and other revenues		86		78		65
Net investment income		335		321		300
Segment revenues	$	3,970	$	3,747	$	3,409
Depreciation and amortization	$	22	$	14	$	11
Income taxes	$	140	$	101	$	116
Segment earnings	$	317	$	259	$	279
Other Operations
Premiums	$	112	$	105	$	121
Fees and other revenues		14		(24)		(101)
Net investment income		384		408		490
Segment revenues	$	510	$	489	$	510
Depreciation and amortization	$	2	$	1	$	2
Income taxes (benefits)	$	29	$	(237)	$	43
Segment earnings (loss)	$	68	$	(394)	$	82
Corporate
Other revenues and eliminations	$	(16)	$	(14)	$	(24)
Net investment income		1		10		5
Segment revenues	$	(15)	$	(4)	$	(19)
Depreciation and amortization	$	1	$	3	$	3
Income tax benefits	$	(90)	$	(110)	$	(148)
Segment loss	$	(265)	$	(222)	$	(329)
Realized investment gains
Realized investment gains	$	154	$	213	$	44
Income taxes		48		72		13
Realized investment gains, net of taxes	$	106	$	141	$	31
Total
Premiums	$	27,214	$	25,575	$	23,017
Fees and other revenues		4,141		3,601		3,291
Mail order pharmacy revenues		2,239		1,827		1,623
Net investment income		1,166		1,164		1,144
Realized investment gains		154		213		44
Total revenues	$	34,914	$	32,380	$	29,119
Depreciation and amortization	$	588	$	597	$	560
Income taxes	$	1,210	$	698	$	853
Segment earnings	$	1,996	$	1,335	$	1,592
Realized investment gains, net of taxes	$	106	$	141	$	31
Shareholders' net income	$	2,102	$	1,476	$	1,623

Revenues From External Customers by Product Table [Text Block]

(In millions)	2014		2013		2012
Medical	$	24,476	$	22,933	$	20,973
Disability		1,767		1,616		1,413
Supplemental Health, Life, and Accident		4,739		4,322		3,680
Mail order pharmacy		2,239		1,827		1,623
Other		373		305		242
Total	$	33,594	$	31,003	$	27,931

Revenues From External Customers by Geographic Location [Table Text Block]

(In millions)	2014		2013		2012
U.S.	$	30,070	$	27,868	$	25,217
Foreign		3,524		3,135		2,714
Total	$	33,594	$	31,003	$	27,931