Condensed Consolidated Statements Of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Revenues:
Premiums	$ 13,248us-gaap_PremiumsEarnedNet	$ 11,083us-gaap_PremiumsEarnedNet
Services	490us-gaap_SalesRevenueServicesNet	538us-gaap_SalesRevenueServicesNet
Investment income	95	91
Total revenues	13,833us-gaap_Revenues	11,712us-gaap_Revenues
Operating expenses:
Benefits	11,005	9,124
Operating costs	1,945	1,785
Depreciation and amortization	93	82
Total operating expenses	13,043us-gaap_BenefitsLossesAndExpenses	10,991us-gaap_BenefitsLossesAndExpenses
Income from operations	790us-gaap_OperatingIncomeLoss	721us-gaap_OperatingIncomeLoss
Interest expense	46us-gaap_InterestExpense	35us-gaap_InterestExpense
Income before income taxes	744	686
Provision for income taxes	314us-gaap_IncomeTaxExpenseBenefit	318us-gaap_IncomeTaxExpenseBenefit
Net income	$ 430us-gaap_NetIncomeLoss	$ 368us-gaap_NetIncomeLoss
Basic earnings per common share (in dollars per share)	$ 2.86us-gaap_EarningsPerShareBasic	$ 2.37us-gaap_EarningsPerShareBasic
Diluted earnings per common share (in dollars per share)	$ 2.82us-gaap_EarningsPerShareDiluted	$ 2.35us-gaap_EarningsPerShareDiluted
Dividends per common share (in dollars per share)	$ 0.28	$ 0.27

Depreciation and amortization expense excluding depreciation and amortization primarily from the delivery of pharmacy services by our wholly-owned pharmacy business (included in our Healthcare Services segment) which has been reclassified to benefit expenses.

No definition available.