$ELV
Elevance Health, Inc. Stock $elv

$elv Overview Financials Valuation SEC Filings Company Website

2013 Q1 Form 10-K Financial Statement

#000119312513071165 Filed on February 22, 2013

Income Statement

Concept	2013 Q1	2012	2011 Q4
Revenue	$17.58B	$61.50B	$15.32B
YoY Change	14.02%	1.3%	4.69%
Cost Of Revenue	$65.00M	$137.4M
YoY Change
Gross Profit	$17.51B	$61.36B
YoY Change	13.6%	1.07%
Gross Profit Margin	99.63%	99.78%
Selling, General & Admin	$2.329B	$8.681B	$2.228B
YoY Change	7.54%	2.9%	-4.83%
% of Gross Profit	13.3%	14.15%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$25.30M	$107.1M	$181.0M
YoY Change	7.66%	11.91%	13.84%
% of Gross Profit	0.14%	0.17%
Operating Expenses	$2.329B	$8.681B	$14.73B
YoY Change	7.54%	2.9%	7.05%
Operating Profit	$1.357B	$3.620B
YoY Change	11.93%	-4.29%
Interest Expense	$153.5M	$511.8M	-$113.0M
YoY Change	40.7%	18.94%	0.0%
% of Operating Profit	11.31%	14.14%
Other Income/Expense, Net
YoY Change
Pretax Income	$1.283B	$3.858B	$478.2M
YoY Change	-2.08%	-2.52%	-36.41%
Income Tax	$410.2M	$1.207B	$143.0M
% Of Pretax Income	31.98%	31.29%	29.9%
Net Earnings	$885.2M	$2.656B	$335.3M
YoY Change	3.35%	0.33%	-38.93%
Net Earnings / Revenue	5.04%	4.32%	2.19%
Basic Earnings Per Share	$2.92	$8.26	$0.97
Diluted Earnings Per Share	$2.89	$8.18	$0.96
COMMON SHARES
Basic Shares Outstanding	303.2M shares	321.5M shares
Diluted Shares Outstanding	305.9M shares	324.8M shares

Balance Sheet

Concept	2013 Q1	2012	2011 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$19.48B		$18.11B
YoY Change	5.43%
Cash & Equivalents	$1.660B	$2.475B	$2.202B
Short-Term Investments	$17.82B		$15.91B
Other Short-Term Assets	$1.891B		$1.859B
YoY Change	-1.54%
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$28.66B		$27.10B
YoY Change	4.06%		2874.47%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.738B	$1.717B	$1.418B
YoY Change	19.49%	21.09%	22.67%
Goodwill	$17.49B		$13.86B
YoY Change	26.2%		4.48%
Intangibles	$9.056B		$7.932B
YoY Change	14.95%
Long-Term Investments	$21.17B	$19.99B	$18.50B
YoY Change	12.87%	8.08%	0.26%
Other Assets	$483.3M	$1.899B	$478.4M
YoY Change	8.44%	46.53%	-64.85%
Total Long-Term Assets	$30.75B		$25.07B
YoY Change	23.22%		-49.11%
TOTAL ASSETS
Total Short-Term Assets	$28.66B		$27.10B
Total Long-Term Assets	$30.75B		$25.07B
Total Assets	$59.41B	$58.96B	$52.16B
YoY Change	13.17%	13.02%	3.98%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.937B	$3.099B	$3.124B
YoY Change	4.52%	-0.8%	6.19%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$350.0M	$250.0M	$100.0M
YoY Change	250.0%	150.0%	0.0%
Long-Term Debt Due	$399.4M	$557.0M	$1.275B
YoY Change	-56.15%	-56.31%	80.52%
Total Short-Term Liabilities	$16.03B	$4.540B	$15.90B
YoY Change	0.47%	-16.28%	239.5%
LONG-TERM LIABILITIES
Long-Term Debt	$14.03B	$14.17B	$8.466B
YoY Change	65.79%	67.39%	3.9%
Other Long-Term Liabilities	$971.8M	$2.990B	$1.056B
YoY Change	-5.19%	7.44%	-67.28%
Total Long-Term Liabilities	$15.00B	$17.16B	$9.522B
YoY Change	58.12%	52.56%	-16.29%
TOTAL LIABILITIES
Total Short-Term Liabilities	$16.03B	$4.540B	$15.90B
Total Long-Term Liabilities	$15.00B	$17.16B	$9.522B
Total Liabilities	$35.09B	$35.15B	$28.88B
YoY Change	21.14%	21.74%	9.57%
SHAREHOLDERS EQUITY
Retained Earnings	$13.28B		$11.49B
YoY Change	11.36%
Common Stock	$3.000M		$3.400M
YoY Change	-9.09%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$24.32B	$23.80B	$23.29B
YoY Change
Total Liabilities & Shareholders Equity	$59.41B	$58.96B	$52.16B
YoY Change	13.17%	13.02%	3.98%

Cashflow Statement

Concept	2013 Q1	2012	2011 Q4
OPERATING ACTIVITIES
Net Income	$885.2M	$2.656B	$335.3M
YoY Change	3.35%	0.33%	-38.93%
Depreciation, Depletion And Amortization	$25.30M	$107.1M	$181.0M
YoY Change	7.66%	11.91%	13.84%
Cash From Operating Activities	$956.9M	$2.745B	$57.00M
YoY Change	-21.76%	-18.66%	-90.29%
INVESTING ACTIVITIES
Capital Expenditures	$107.5M	$544.9M	-$186.0M
YoY Change	-13.17%	4.89%	58.97%
Acquisitions	$0.00	$4.597B
YoY Change	-100.0%	666.17%
Other Investing Activities	$0.00	-$3.100M	$566.0M
YoY Change	-100.0%	-109.97%	3673.33%
Cash From Investing Activities	-$1.196B	-$4.552B	$381.0M
YoY Change	-6048.26%	383.18%	-469.9%
FINANCING ACTIVITIES
Cash Dividend Paid	$113.4M	$367.1M	$85.70M
YoY Change	18.37%	2.6%
Common Stock Issuance & Retirement, Net	$340.2M	$2.497B
YoY Change	-49.96%	-17.86%
Debt Paid & Issued, Net	$556.9M	$1.251B
YoY Change	58.75%	77.46%
Cash From Financing Activities	-$579.1M	$2.089B	-744.0M
YoY Change	-50.38%	-203.45%	-20.77%
NET CHANGE
Cash From Operating Activities	$956.9M	$2.745B	57.00M
Cash From Investing Activities	-$1.196B	-$4.552B	381.0M
Cash From Financing Activities	-$579.1M	$2.089B	-744.0M
Net Change In Cash	-$817.8M	$281.9M	-306.0M
YoY Change	-1173.23%	-31.78%	-32.75%
FREE CASH FLOW
Cash From Operating Activities	$956.9M	$2.745B	$57.00M
Capital Expenditures	$107.5M	$544.9M	-$186.0M
Free Cash Flow	$849.4M	$2.200B	$243.0M
YoY Change	-22.73%	-22.95%	-65.48%

Facts In Submission

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CY2010	us-gaap	Cost Of Goods Sold CostOfGoodsSold	0	USD
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CY2011	us-gaap	Increase Decrease In Outstanding Checks Financing Activities IncreaseDecreaseInOutstandingChecksFinancingActivities	264300000	USD
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3039800000	USD
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CY2010	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	3321700000	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	42200000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2019200000	USD
CY2011	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-400000	USD
CY2012	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	191600000	USD
CY2010	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	350900000	USD
CY2010	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	197900000	USD
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CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	136000000	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	101800000	USD
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	28100000	USD
CY2010	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-109700000	USD
CY2010	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-5100000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	320100000	USD
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CY2010	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-1239800000	USD
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CY2010	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	10567200000	USD
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CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	28100000	USD
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CY2010	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	266000000	USD
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CY2012Q4	wlp	Number Of Commercial Medical Members NumberOfCommercialMedicalMembers	36.1	pure
CY2012Q4	wlp	Number Of Individuals Members NumberOfIndividualsMembers	66.5	pure
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CY2012	us-gaap	Nature Of Operations NatureOfOperations	<p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0px;">1</font><font style="font-family:Times New Roman;font-size:10pt;font-weight:bold;">.</font><font style="font-family:Times New Roman;font-size:10pt;font-weight:bold;"> Organization</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:18px;">References to the terms “we”, “our”, “us”, “WellPoint” or the “Company” used throughout these Notes to Consolidated Financial Statements refer to WellPoint, Inc., an Indiana corporation, and unless the context otherwise requires, its direct and indirect subsidiaries.</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:18px;">We are</font><font style="font-family:Times New Roman;font-size:10pt;"> one of</font><font style="font-family:Times New Roman;font-size:10pt;"> the</font><font style="font-family:Times New Roman;font-size:10pt;"> largest health benefits companies</font><font style="font-family:Times New Roman;font-size:10pt;"> in terms of </font><font style="font-family:Times New Roman;font-size:10pt;">medical</font><font style="font-family:Times New Roman;font-size:10pt;"> membership in the United States, serving </font><font style="font-family:Times New Roman;font-size:10pt;">36.1</font><font style="font-family:Times New Roman;font-size:10pt;"> medical members through our affiliated health plans and a total of more than </font><font style="font-family:Times New Roman;font-size:10pt;">66.5</font><font style="font-family:Times New Roman;font-size:10pt;"> individuals through our subsidiaries as of </font><font style="font-family:Times New Roman;font-size:10pt;">December 31</font><font style="font-family:Times New Roman;font-size:10pt;">, </font><font style="font-family:Times New Roman;font-size:10pt;">2012</font><font style="font-family:Times New Roman;font-size:10pt;">. We offer a broad spectrum of network-based managed care plans to large and small employer, individual, Medicaid and senior markets. Our managed care plans include: preferred provider organizations, or PPOs; health maintenance organizations, or HMOs; point-of-service, or POS, plans; traditional indemnity plans and other hybrid plans, including consumer-driven health plans, or CDHPs; and hospital only and limited benefit products. In addition, we provide a broad array of managed care services to self-funded customers, including claims processing, underwriting, stop </font><font style="font-family:Times New Roman;font-size:10pt;">loss insurance, actuarial services, provider network access, medical cost management, disease management, wellness programs and other administrative services. </font><font style="font-family:Times New Roman;font-size:10pt;">We provide an array of specialty and other insurance</font><font style="font-family:Times New Roman;font-size:10pt;"> products and services such as </font><font style="font-family:Times New Roman;font-size:10pt;">behavioral health benefit services, dental, vision, life and </font><font style="font-family:Times New Roman;font-size:10pt;">disability insurance benefits, radiology benefit management, analytics-driven personal health care guidance and long-term</font><font style="font-family:Times New Roman;font-size:10pt;"> care insurance. </font><font style="font-family:Times New Roman;font-size:10pt;">We also</font><font style="font-family:Times New Roman;font-size:10pt;"> provide services to the Federal Government in connection with the Federal Employee Program, or FEP, and various Medicare programs.</font><font style="font-family:Times New Roman;font-size:10pt;"> Finally, we sell contact lenses, eyeglasses and other ocular products through our 1-800 CONTACTS, Inc., or 1-800 CONTACTS, </font><font style="font-family:Times New Roman;font-size:10pt;">business</font><font style="font-family:Times New Roman;font-size:10pt;">.</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:18px;">We are an independent licensee of the Blue Cross and Blue Shield Association, or BCBSA, an association of independent health benefit plans. We serve our members as the Blue Cross licensee for California; the Blue Cross and Blue Shield, or BCBS, licensee for Colorado, Connecticut, Georgia, Indiana, Kentucky, Maine, Missouri (excluding 30 counties in the Kansas City area), Nevada, New Hampshire, New York (as the BCBS licensee in </font><font style="font-family:Times New Roman;font-size:10pt;">10</font><font style="font-family:Times New Roman;font-size:10pt;"> New York City metropolitan and surrounding counties and as the Blue Cross or BCBS licensee in selected upstate counties only), Ohio, Virginia (excluding the Northern Virginia suburbs of Washington, D.C.) and Wisconsin. In a majority of these service areas we do business as Anthem Blue Cross, Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Georgia, Empire Blue Cross Blue Shield, or Empire Blue Cross (in our </font><font style="font-family:Times New Roman;font-size:10pt;">New York</font><font style="font-family:Times New Roman;font-size:10pt;"> service </font><font style="font-family:Times New Roman;font-size:10pt;">areas). </font><font style="font-family:Times New Roman;font-size:10pt;">Through our recent acquisition of AMERIGROUP Corporation, or </font><font style="font-family:Times New Roman;font-size:10pt;">Amerigroup</font><font style="font-family:Times New Roman;font-size:10pt;">, as further described </font><font style="font-family:Times New Roman;font-size:10pt;">in </font><font style="font-family:Times New Roman;font-size:10pt;">Note </font><font style="font-family:Times New Roman;font-size:10pt;">3</font><font style="font-family:Times New Roman;font-size:10pt;">, “Business Combinations</font><font style="font-family:Times New Roman;font-size:10pt;">,</font><font style="font-family:Times New Roman;font-size:10pt;">”</font><font style="font-family:Times New Roman;font-size:10pt;"> we conduct business in Texas, Florida, Georgia, Maryland, Tennessee, New </font><font style="font-family:Times New Roman;font-size:10pt;">Jersey, New York, Nevada, Ohio</font><font style="font-family:Times New Roman;font-size:10pt;">, New Mexico, Louisiana and Washington</font><font style="font-family:Times New Roman;font-size:10pt;">, and beginning January 1, 2013 </font><font style="font-family:Times New Roman;font-size:10pt;">Amerigroup</font><font style="font-family:Times New Roman;font-size:10pt;"> conduct</font><font style="font-family:Times New Roman;font-size:10pt;">s</font><font style="font-family:Times New Roman;font-size:10pt;"> business in Kansas</font><font style="font-family:Times New Roman;font-size:10pt;">.</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">We also serve customers throughout the country as </font><font style="font-family:Times New Roman;font-size:10pt;">UniCare</font><font style="font-family:Times New Roman;font-size:10pt;">, and in </font><font style="font-family:Times New Roman;font-size:10pt;">certain California, Arizona, Nevada, New York and Virginia </font><font style="font-family:Times New Roman;font-size:10pt;">markets through our </font><font style="font-family:Times New Roman;font-size:10pt;">CareMore</font><font style="font-family:Times New Roman;font-size:10pt;"> Health Group, Inc</font><font style="font-family:Times New Roman;font-size:10pt;">.</font><font style="font-family:Times New Roman;font-size:10pt;">, or </font><font style="font-family:Times New Roman;font-size:10pt;">CareMore</font><font style="font-family:Times New Roman;font-size:10pt;">,</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">subsidiary</font><font style="font-family:Times New Roman;font-size:10pt;">.</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">We are licensed to conduct insurance operations in all </font><font style="font-family:Times New Roman;font-size:10pt;">50</font><font style="font-family:Times New Roman;font-size:10pt;"> states through our subsidiaries.</font></p>
CY2012	us-gaap	Basis Of Accounting BasisOfAccounting	<p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;margin-left:18px;">Basis of Presentation:</font><font style="font-family:Times New Roman;font-size:10pt;"> The accompanying consolidated financial statements include the accounts of WellPoint and its subsidiaries and have been prepared in conformity with U.S. generally accepted accounting principles, or GAAP. All significant intercompany accounts and transactions have been eliminated in consolidation. </font></p><div style="text-align:center;"> </div><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:18px;">Certain of our subsidiaries operate outside of the United States and have functional currencies other than the U.S. dollar, or USD. We translate the assets and liabilities of those subsidiaries to USD using the exchange rate in effect at the end of the period. We translate the revenues and expenses of those subsidiaries to USD using the average exchange rates in effect during the period. The net effect of these translation adjustments is included in “Foreign currency translation adjustments” in our consolidated statements of shareholders' equity.</font></p>
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;margin-left:18px;">Use of Estimates:</font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;"> </font><font style="font-family:Times New Roman;font-size:10pt;">The preparation of consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported in our consolidated financial statements and accompanying notes. Actual results could differ from those estimates.</font></p>
CY2012	us-gaap	Reclassifications Reclassifications	<p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;margin-left:18px;">Reclassifications:</font><font style="font-family:Times New Roman;font-size:10pt;font-weight:bold;"> </font><font style="font-family:Times New Roman;font-size:10pt;">As discussed above within the “Other Policyholder Liabilities” section of this Note 2, “Basis of Presentation and Significant Accounting Policies,”</font><font style="font-family:Times New Roman;font-size:10pt;font-weight:bold;"> </font><font style="font-family:Times New Roman;font-size:10pt;">Health Care Reform requires </font><font style="font-family:Times New Roman;font-size:10pt;">that certain lines of business meet specified minimum </font><font style="font-family:Times New Roman;font-size:10pt;">MLR thresholds</font><font style="font-family:Times New Roman;font-size:10pt;">. </font><font style="font-family:Times New Roman;font-size:10pt;">If those thresholds are not met or exceeded, we are required to </font><font style="font-family:Times New Roman;font-size:10pt;">pay minimum MLR rebates. </font><font style="font-family:Times New Roman;font-size:10pt;">For</font><font style="font-family:Times New Roman;font-size:10pt;"> purpose</font><font style="font-family:Times New Roman;font-size:10pt;">s of determining MLR rebates</font><font style="font-family:Times New Roman;font-size:10pt;">, </font><font style="font-family:Times New Roman;font-size:10pt;">HHS has</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">defined the types of costs that should be included in the minimum MLR rebate calculation.</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">HHS'</font><font style="font-family:Times New Roman;font-size:10pt;"> definition </font><font style="font-family:Times New Roman;font-size:10pt;">of costs </font><font style="font-family:Times New Roman;font-size:10pt;">varied from our pri</font><font style="font-family:Times New Roman;font-size:10pt;">or benefit expense classification </font><font style="font-family:Times New Roman;font-size:10pt;">under GAAP. Where appropriate, we adopted </font><font style="font-family:Times New Roman;font-size:10pt;">HHS'</font><font style="font-family:Times New Roman;font-size:10pt;"> classification </font><font style="font-family:Times New Roman;font-size:10pt;">of costs </font><font style="font-family:Times New Roman;font-size:10pt;">effective January 1, 2011 to further align our GAAP basis </font><font style="font-family:Times New Roman;font-size:10pt;">benefit expense</font><font style="font-family:Times New Roman;font-size:10pt;"> to that used in the calculation for determining </font><font style="font-family:Times New Roman;font-size:10pt;">MLR rebates under </font><font style="font-family:Times New Roman;font-size:10pt;">HHS guidance. </font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">However, certain components of the MLR computation as defined by HHS cannot be classified consistently under GAAP. Accordingly, benefit expense ratios shown in our GAAP basis presentation are different than the MLRs used to calculate rebates under HHS guidance. </font><font style="font-family:Times New Roman;font-size:10pt;">Prior period </font><font style="font-family:Times New Roman;font-size:10pt;">amounts </font><font style="font-family:Times New Roman;font-size:10pt;">were</font><font style="font-family:Times New Roman;font-size:10pt;"> not reclassified due to immateriality.</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:18px;">Certain other prior year amounts have been reclassified to conform to the current year presentation.</font></p>
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CY2012	wlp	Minimum Percentage Of Cash Collateral On Market Value Of Security Loan MinimumPercentageOfCashCollateralOnMarketValueOfSecurityLoan	1	pure
CY2012	wlp	Percentage Of Collateral Delivered On Market Value Security Loan PercentageOfCollateralDeliveredOnMarketValueSecurityLoan	1.02	pure
CY2012	wlp	Percentage Of Purchase Price Per Share On Fair Value Of Share Of Common Stock PercentageOfPurchasePricePerShareOnFairValueOfShareOfCommonStock	0.85	pure
CY2012	us-gaap	Advertising Expense AdvertisingExpense	299200000	USD
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CY2010	us-gaap	Advertising Expense AdvertisingExpense	226100000	USD
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CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Amount BusinessAcquisitionPurchasePriceAllocationGoodwillAmount	3033100000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Intangible Assets Other Than Goodwill BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill	955000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Noncurrent Assets BusinessAcquisitionPurchasePriceAllocationNoncurrentAssets	406100000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired BusinessAcquisitionPurchasePriceAllocationAssetsAcquired	7110700000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Current Liabilities BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities	1418200000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Noncurrent Liabilities BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilities	917000000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Liabilities Assumed BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed	2335200000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired Liabilities Assumed Net BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet	4775500000	USD
CY2012Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	17356100000	USD
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CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	-36700000	USD
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	-14600000	USD
CY2012Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	18586900000	USD
CY2011Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	16440500000	USD
CY2011Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	1107100000	USD
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	-129200000	USD
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	-41600000	USD
CY2011Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	17376800000	USD
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	18586900000	USD
CY2012Q4	wlp	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Less Number Of Positions AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLessNumberOfPositions	1709	pure
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1911200000	USD
CY2012Q4	wlp	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	143	shares
CY2012	wlp	Future Capital Calls From Various Third Party Investments FutureCapitalCallsFromVariousThirdPartyInvestments	288100000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	158000000	USD
CY2011Q4	wlp	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Less Number Of Positions AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLessNumberOfPositions	2352	pure
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	2480000000	USD
CY2011Q4	wlp	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	221	shares
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	356900000	USD
CY2012	us-gaap	Net Investment Income Insurance Entity Fixed Maturities NetInvestmentIncomeInsuranceEntityFixedMaturities	652800000	USD
CY2012	us-gaap	Net Investment Income Insurance Entity Equity Securities NetInvestmentIncomeInsuranceEntityEquitySecurities	38400000	USD
CY2012	wlp	Cash And Cash Equivalents Net Investment Income CashAndCashEquivalentsNetInvestmentIncome	2500000	USD
CY2012	wlp	Other Net Investment Income OtherNetInvestmentIncome	34600000	USD
CY2012	us-gaap	Investment Income Net InvestmentIncomeNet	728300000	USD
CY2012	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	42200000	USD
CY2011	us-gaap	Net Investment Income Insurance Entity Fixed Maturities NetInvestmentIncomeInsuranceEntityFixedMaturities	692400000	USD
CY2011	us-gaap	Net Investment Income Insurance Entity Equity Securities NetInvestmentIncomeInsuranceEntityEquitySecurities	34000000	USD
CY2011	wlp	Cash And Cash Equivalents Net Investment Income CashAndCashEquivalentsNetInvestmentIncome	3700000	USD
CY2011	wlp	Other Net Investment Income OtherNetInvestmentIncome	2400000	USD
CY2011	us-gaap	Investment Income Net InvestmentIncomeNet	732500000	USD
CY2011	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	28800000	USD
CY2010	us-gaap	Net Investment Income Insurance Entity Fixed Maturities NetInvestmentIncomeInsuranceEntityFixedMaturities	740700000	USD
CY2010	us-gaap	Net Investment Income Insurance Entity Equity Securities NetInvestmentIncomeInsuranceEntityEquitySecurities	29600000	USD
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CY2010	wlp	Other Net Investment Income OtherNetInvestmentIncome	61900000	USD
CY2010	us-gaap	Investment Income Net InvestmentIncomeNet	840500000	USD
CY2010	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	37200000	USD
CY2012	wlp	Other Realized Gain Loss On Investment OtherRealizedGainLossOnInvestment	500000	USD
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CY2012	wlp	Deferred Income Tax Expense Benefit Related To Unrealized Gain Loss On Investments DeferredIncomeTaxExpenseBenefitRelatedToUnrealizedGainLossOnInvestments	-100100000	USD
CY2012	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss Net Of Tax AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax	194400000	USD
CY2012	wlp	Net Realized Gains Losses On Investments Other Than Temporary Impairment Losses Recognized In Income And Net Change In Net Unrealized Gains Losses On Investments NetRealizedGainsLossesOnInvestmentsOtherThanTemporaryImpairmentLossesRecognizedInIncomeAndNetChangeInNetUnrealizedGainsLossesOnInvestments	491500000	USD
CY2011	wlp	Other Realized Gain Loss On Investment OtherRealizedGainLossOnInvestment	3600000	USD
CY2011	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss	31300000	USD
CY2011	wlp	Deferred Income Tax Expense Benefit Related To Unrealized Gain Loss On Investments DeferredIncomeTaxExpenseBenefitRelatedToUnrealizedGainLossOnInvestments	-11400000	USD
CY2011	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss Net Of Tax AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax	19900000	USD
CY2011	wlp	Net Realized Gains Losses On Investments Other Than Temporary Impairment Losses Recognized In Income And Net Change In Net Unrealized Gains Losses On Investments NetRealizedGainsLossesOnInvestmentsOtherThanTemporaryImpairmentLossesRecognizedInIncomeAndNetChangeInNetUnrealizedGainsLossesOnInvestments	161700000	USD
CY2010	wlp	Other Realized Gain Loss On Investment OtherRealizedGainLossOnInvestment	-11200000	USD
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CY2010	wlp	Deferred Income Tax Expense Benefit Related To Unrealized Gain Loss On Investments DeferredIncomeTaxExpenseBenefitRelatedToUnrealizedGainLossOnInvestments	-54600000	USD
CY2010	us-gaap	Available For Sale Securities Change In Net Unrealized Holding Gain Loss Net Of Tax AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax	139800000	USD
CY2010	wlp	Net Realized Gains Losses On Investments Other Than Temporary Impairment Losses Recognized In Income And Net Change In Net Unrealized Gains Losses On Investments NetRealizedGainsLossesOnInvestmentsOtherThanTemporaryImpairmentLossesRecognizedInIncomeAndNetChangeInNetUnrealizedGainsLossesOnInvestments	294500000	USD
CY2012Q4	us-gaap	Marketable Securities Fixed Maturities MarketableSecuritiesFixedMaturities	1800000	USD
CY2011Q4	us-gaap	Marketable Securities Fixed Maturities MarketableSecuritiesFixedMaturities	11900000	USD
CY2012Q4	us-gaap	Assets Held By Insurance Regulators AssetsHeldByInsuranceRegulators	431500000	USD
CY2011Q4	us-gaap	Assets Held By Insurance Regulators AssetsHeldByInsuranceRegulators	246800000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	-69300000	USD
CY2012Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	14650400000	USD
CY2011Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	8814100000	USD
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CY2011Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	424800000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	-419000000	USD
CY2011Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	-284500000	USD
CY2012Q4	us-gaap	Notional Amount Of Fair Value Hedge Instruments NotionalAmountOfFairValueHedgeInstruments	1650000000	USD
CY2011Q4	us-gaap	Notional Amount Of Fair Value Hedge Instruments NotionalAmountOfFairValueHedgeInstruments	1105000000	USD
CY2012Q4	us-gaap	Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet	4600000	USD
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CY2011Q4	us-gaap	Securities Held As Collateral At Fair Value SecuritiesHeldAsCollateralAtFairValue	871400000	USD
CY2011Q4	us-gaap	Assets Fair Value Disclosure Recurring AssetsFairValueDisclosureRecurring	20025400000	USD
CY2011Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	284800000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	14400000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	-33100000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	89100000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	-46900000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues	0	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	-116800000	USD
CY2010Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	388700000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-3500000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	30700000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	1300000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	64500000	USD
CY2012Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	155500000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	-68200000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues	0	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	-150400000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	-6600000	USD
CY2011	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss Included In Investment Income FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInInvestmentIncome	-8800000	USD
CY2012	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss Included In Investment Income FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInInvestmentIncome	-700000	USD
CY2009Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	351300000	USD
CY2010	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-13400000	USD
CY2010	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	35600000	USD
CY2010	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements	-50400000	USD
CY2010	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	65600000	USD
CY2010	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	0	USD
CY2010	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss Included In Investment Income FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInInvestmentIncome	-10600000	USD
CY2012Q4	wlp	Business Combination BusinessCombination	2600000	USD
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	59000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	405300000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	418500000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	437400000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	221200000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	22300000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	108200000	USD
CY2012Q4	wlp	Deferred Tax Assets Related To State Income Tax DeferredTaxAssetsRelatedToStateIncomeTax	85700000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	55700000	USD
CY2012Q4	wlp	Deferred Tax Assets Investment Basis DeferredTaxAssetsInvestmentBasis	138200000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	47000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1521000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	18100000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1502900000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other Comprehensive Income DeferredTaxLiabilitiesOtherComprehensiveIncome	431000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	2301800000	USD
CY2012Q4	wlp	Deferred Tax Liabilities Relating To Subscriber Base Provider And Hospital Networks DeferredTaxLiabilitiesRelatingToSubscriberBaseProviderAndHospitalNetworks	499400000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	599300000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Prepaid Pension Costs DeferredTaxLiabilitiesPrepaidPensionCosts	214100000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	189700000	USD
CY2012Q4	wlp	Deferred Tax Liabilities Relating To State Deferred Tax DeferredTaxLiabilitiesRelatingToStateDeferredTax	184400000	USD
CY2010	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-28800000	USD
CY2012Q4	wlp	Deferred Tax Assets Related To Depreciation And Amortization DeferredTaxAssetsRelatedToDepreciationAndAmortization	79000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	142000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	55700000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	-9000000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	-100000	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	-2900000	USD
CY2012Q4	us-gaap	Income Tax Examination Interest Accrued IncomeTaxExaminationInterestAccrued	15700000	USD
CY2011Q4	us-gaap	Income Tax Examination Interest Accrued IncomeTaxExaminationInterestAccrued	24700000	USD
CY2011Q4	wlp	Deferred Tax Assets Investment Basis DeferredTaxAssetsInvestmentBasis	149000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	3818500000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	49500000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1530300000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-3137800000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	466300000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	189400000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	11000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	4640700000	USD
CY2012Q4	wlp	Valuation Allowance Deferred Tax Asset Release ValuationAllowanceDeferredTaxAssetRelease	11000000	USD
CY2012Q4	wlp	Valuation Allowance Deferred Tax Asset Increase ValuationAllowanceDeferredTaxAssetIncrease	18100000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1057400000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	161400000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	2095500000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	30500000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	117200000	USD
CY2011Q4	wlp	Deferred Tax Assets Related To State Income Tax DeferredTaxAssetsRelatedToStateIncomeTax	54200000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1519300000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Other Comprehensive Income DeferredTaxLiabilitiesOtherComprehensiveIncome	328200000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-2299200000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	0	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Prepaid Pension Costs DeferredTaxLiabilitiesPrepaidPensionCosts	202700000	USD
CY2011Q4	wlp	Deferred Tax Liabilities Relating To Subscriber Base Provider And Hospital Networks DeferredTaxLiabilitiesRelatingToSubscriberBaseProviderAndHospitalNetworks	490800000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	414500000	USD
CY2011Q4	wlp	Deferred Tax Liabilities Relating To State Deferred Tax DeferredTaxLiabilitiesRelatingToStateDeferredTax	76300000	USD
CY2011Q4	wlp	Deferred Tax Assets Related To Depreciation And Amortization DeferredTaxAssetsRelatedToDepreciationAndAmortization	49100000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	95700000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1153100000	USD
CY2012	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	56900000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1150400000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	21600000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1172000000	USD
CY2011	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	139200000	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1329500000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	28500000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1358000000	USD
CY2010	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	108700000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	25200000	USD
CY2012	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	59300000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Settlements Domestic IncomeTaxReconciliationTaxSettlementsDomestic	-200500000	USD
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	91700000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	42300000	USD
CY2011	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	58600000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Settlements Domestic IncomeTaxReconciliationTaxSettlementsDomestic	-49700000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-8100000	USD
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	42800000	USD
CY2010	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	53000000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Settlements Domestic IncomeTaxReconciliationTaxSettlementsDomestic	-18100000	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	1188200000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1098900000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1352900000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1385300000	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1523800000	USD
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.006	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	-0.015	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements Domestic EffectiveIncomeTaxRateReconciliationTaxSettlementsDomestic	-0.052	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.024	pure
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.313	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.011	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	-0.015	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements Domestic EffectiveIncomeTaxRateReconciliationTaxSettlementsDomestic	-0.013	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002	pure
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.331	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.010	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	-0.012	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements Domestic EffectiveIncomeTaxRateReconciliationTaxSettlementsDomestic	-0.004	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.007	pure
CY2010	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.337	pure
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	229100000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	50100000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	13000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	-148700000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	143500000	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	231000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	10000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	4100000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	-200000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	-15800000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	103000000	USD
CY2012Q4	wlp	Unrecognized Tax Benefits That Would Impact Additional Paid In Capital UnrecognizedTaxBenefitsThatWouldImpactAdditionalPaidInCapital	4700000	USD
CY2012Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	800000	USD
CY2011Q4	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.00260	pure
CY2012Q4	us-gaap	Federal Home Loan Bank Advances Short Term FederalHomeLoanBankAdvancesShortTerm	250000000	USD
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	1153900000	USD
CY2011	us-gaap	Defined Benefit Plan Business Combinations And Acquisitions Plan Assets DefinedBenefitPlanBusinessCombinationsAndAcquisitionsPlanAssets	113900000	USD
CY2011	us-gaap	Defined Benefit Plan Divestitures Plan Assets DefinedBenefitPlanDivestituresPlanAssets	-125000000	USD
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	2531900000	USD
CY2012Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Estimated Range Of Change Lower Bound SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeLowerBound	12400000	USD
CY2012Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Estimated Range Of Change Upper Bound SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound	-95300000	USD
CY2012Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	63700000	USD
CY2012	us-gaap	Operating Loss Carryforwards Expiration Dates OperatingLossCarryforwardsExpirationDates	2015 through 2024
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3220500000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	-1482200000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2655200000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	-1237100000	USD
CY2012Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	59000000	USD
CY2011Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	59000000	USD
CY2012	wlp	Accumulated Amortization On Leased Assets AccumulatedAmortizationOnLeasedAssets	59000000	USD
CY2011	wlp	Accumulated Amortization On Leased Assets AccumulatedAmortizationOnLeasedAssets	58500000	USD
CY2012	wlp	Impairment For Information Technology Assets ImpairmentForInformationTechnologyAssets	66800000	USD
CY2010	wlp	Impairment For Information Technology Assets ImpairmentForInformationTechnologyAssets	95300000	USD
CY2010Q4	us-gaap	Goodwill Goodwill	13264900000	USD
CY2012Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	-41000000	USD
CY2011	us-gaap	Goodwill Allocation Adjustment GoodwillAllocationAdjustment	-1500000	USD
CY2012	us-gaap	Goodwill Allocation Adjustment GoodwillAllocationAdjustment	-2000000	USD
CY2012	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	400000	USD
CY2011	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	1500000	USD
CY2012Q4	wlp	Decrease Related To Other Purchase Accounting Adjustments DecreaseRelatedToOtherPurchaseAccountingAdjustments	1600000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3701400000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	-2135100000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1566300000	USD
CY2012Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	7536500000	USD
CY2012Q4	wlp	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	11237900000	USD
CY2012	wlp	Intangible Assets Accumulated Amortization Excluding Goodwill IntangibleAssetsAccumulatedAmortizationExcludingGoodwill	-2135100000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3448400000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	-1903800000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1544600000	USD
CY2011Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	6387100000	USD
CY2011Q4	wlp	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	9835500000	USD
CY2011	wlp	Intangible Assets Accumulated Amortization Excluding Goodwill IntangibleAssetsAccumulatedAmortizationExcludingGoodwill	-1903800000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	266900000	USD
CY2010	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	21100000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	233400000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	774900000	USD
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y1M
CY2011Q4	us-gaap	Federal Home Loan Bank Advances Short Term FederalHomeLoanBankAdvancesShortTerm	100000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	200400000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	167900000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	146300000	USD
CY2012	us-gaap	Defined Benefit Plan Actual Return On Plan Assets Still Held DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld	23200000	USD
CY2012	us-gaap	Defined Benefit Plan Business Combinations And Acquisitions Plan Assets DefinedBenefitPlanBusinessCombinationsAndAcquisitionsPlanAssets	117700000	USD
CY2012Q4	wlp	Conversion Premium ConversionPremium	0.25	pure
CY2011	us-gaap	Defined Benefit Plan Actual Return On Plan Assets Still Held DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld	14300000	USD
CY2012Q4	wlp	Defined Benefit Fair Value Due From Brokers DefinedBenefitFairValueDueFromBrokers	3200000	USD
CY2011Q4	wlp	Defined Benefit Fair Value Due From Brokers DefinedBenefitFairValueDueFromBrokers	-41600000	USD
CY2009Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	931800000	USD
CY2010	us-gaap	Defined Benefit Plan Actual Return On Plan Assets Still Held DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld	66000000	USD
CY2010	us-gaap	Defined Benefit Plan Purchases Sales And Settlements DefinedBenefitPlanPurchasesSalesAndSettlements	-221500000	USD
CY2010	us-gaap	Defined Benefit Plan Transfers Between Measurement Levels DefinedBenefitPlanTransfersBetweenMeasurementLevels	-4600000	USD
CY2010Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	771700000	USD
CY2012Q4	wlp	Percent Conversion To Stock Price PercentConversionToStockPrice	0.98	pure
CY2012	us-gaap	Defined Benefit Plan Divestitures Plan Assets DefinedBenefitPlanDivestituresPlanAssets	-331900000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	583900000	USD
CY2011	wlp	Income Tax Deductible Related To Discretionary Contributions IncomeTaxDeductibleRelatedToDiscretionaryContributions	87700000	USD
CY2012	wlp	Income Tax Deductible Related To Discretionary Contributions IncomeTaxDeductibleRelatedToDiscretionaryContributions	34500000	USD
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	91000000	USD
CY2011	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	87800000	USD
CY2010	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	120700000	USD
CY2010Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	4852400000	USD
CY2009Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5450500000	USD
CY2011Q4	wlp	Ceded Medical Claims Payable CededMedicalClaimsPayable	-16400000	USD
CY2010Q4	wlp	Ceded Medical Claims Payable CededMedicalClaimsPayable	-32900000	USD
CY2009Q4	wlp	Ceded Medical Claims Payable CededMedicalClaimsPayable	-29900000	USD
CY2011Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	5472600000	USD
CY2010Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	4819500000	USD
CY2009Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	5420600000	USD
CY2012Q4	wlp	Liability For Unpaid Claims And Claims Adjustment Expense Purchase Adjustments LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePurchaseAdjustments	804400000	USD
CY2011Q4	wlp	Liability For Unpaid Claims And Claims Adjustment Expense Purchase Adjustments LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePurchaseAdjustments	100900000	USD
CY2010Q4	wlp	Liability For Unpaid Claims And Claims Adjustment Expense Purchase Adjustments LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePurchaseAdjustments	0	USD
CY2012	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsCurrentYear	48080100000	USD
CY2011	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsCurrentYear	47281600000	USD
CY2010	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsCurrentYear	45077100000	USD
CY2012	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsPriorYears	-513600000	USD
CY2011	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsPriorYears	-209700000	USD
CY2010	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsPriorYears	-718000000	USD
CY2012	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims	47566500000	USD
CY2011	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims	47071900000	USD
CY2010	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims	44359100000	USD
CY2012	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear	42832400000	USD
CY2011	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear	41999000000	USD
CY2010	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear	40387800000	USD
CY2012	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears	4863800000	USD
CY2011	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears	4520700000	USD
CY2010	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears	4572400000	USD
CY2012	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaid	47696200000	USD
CY2011	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaid	46519700000	USD
CY2010	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaid	44960200000	USD
CY2012Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	6147300000	USD
CY2012Q4	wlp	Ceded Medical Claims Payable CededMedicalClaimsPayable	27200000	USD
CY2012Q4	wlp	Product Of Conversion To Stock Price ProductOfConversionToStockPrice	1.3	pure
CY2012Q4	wlp	Use Of Debenture Proceeds UseOfDebentureProceeds	371000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	624800000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1114000000	USD
CY2012	wlp	Favorable Unfavorable Developments By Changes In Trend Factors Assumptions FavorableUnfavorableDevelopmentsByChangesInTrendFactorsAssumptions	-394400000	USD
CY2011	wlp	Favorable Unfavorable Developments By Changes In Trend Factors Assumptions FavorableUnfavorableDevelopmentsByChangesInTrendFactorsAssumptions	-264800000	USD
CY2010	wlp	Favorable Unfavorable Developments By Changes In Trend Factors Assumptions FavorableUnfavorableDevelopmentsByChangesInTrendFactorsAssumptions	-534900000	USD
CY2012	wlp	Favorable Unfavorable Developments By Changes In Completion Factors Assumptions FavorableUnfavorableDevelopmentsByChangesInCompletionFactorsAssumptions	-119200000	USD
CY2011	wlp	Favorable Unfavorable Developments By Changes In Completion Factors Assumptions FavorableUnfavorableDevelopmentsByChangesInCompletionFactorsAssumptions	55100000	USD
CY2010	wlp	Favorable Unfavorable Developments By Changes In Completion Factors Assumptions FavorableUnfavorableDevelopmentsByChangesInCompletionFactorsAssumptions	-183100000	USD
CY2012	wlp	Favorable Unfavorable Developments By Changes In Total Assumptions FavorableUnfavorableDevelopmentsByChangesInTotalAssumptions	-513600000	USD
CY2011	wlp	Favorable Unfavorable Developments By Changes In Total Assumptions FavorableUnfavorableDevelopmentsByChangesInTotalAssumptions	-209700000	USD
CY2010	wlp	Favorable Unfavorable Developments By Changes In Total Assumptions FavorableUnfavorableDevelopmentsByChangesInTotalAssumptions	-718000000	USD
CY2010	wlp	Income Before Income Tax Expense From Adverse Deviation Change IncomeBeforeIncomeTaxExpenseFromAdverseDeviationChange	67700000	USD
CY2010	wlp	Earnings Per Share Diluted From Adverse Deviation Changes EarningsPerShareDilutedFromAdverseDeviationChanges	0.11
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	14727900000	USD
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	9740200000	USD
CY2012Q4	wlp	Commercial Paper Maximum Borrowing Capacity CommercialPaperMaximumBorrowingCapacity	2500000000	USD
CY2012	wlp	Weighted Average Interest Rate On Commercial Paper Borrowings WeightedAverageInterestRateOnCommercialPaperBorrowings	0.00396	pure
CY2011	wlp	Weighted Average Interest Rate On Commercial Paper Borrowings WeightedAverageInterestRateOnCommercialPaperBorrowings	0.00442	pure
CY2012Q4	wlp	Unamortized Debt Discount UnamortizedDebtDiscount	541900000	USD
CY2012Q4	wlp	Net Carrying Amount NetCarryingAmount	958100000	USD
CY2012Q4	us-gaap	Debt Instrument Convertible Carrying Amount Of The Equity Component DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent	543600000	USD
CY2012Q4	us-gaap	Debt Instrument Convertible Conversion Price1 DebtInstrumentConvertibleConversionPrice1	75.5750
CY2012	us-gaap	Debt Instrument Convertible Conversion Ratio DebtInstrumentConvertibleConversionRatio	13.2319	shares
CY2012Q4	wlp	Outstanding Principal Amount Convertible OutstandingPrincipalAmountConvertible	1500000000	USD
CY2012	us-gaap	Interest Paid InterestPaid	479100000	USD
CY2011	us-gaap	Interest Paid InterestPaid	432900000	USD
CY2010	us-gaap	Interest Paid InterestPaid	419600000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1128000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	935800000	USD
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y0M
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	9826400000	USD
CY2012Q4	wlp	Amortization Period AmortizationPeriod	30 years
CY2012Q4	wlp	Required Days RequiredDays	5	pure
CY2012Q4	wlp	Measurement Period MeasurementPeriod	10	pure
CY2012	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	100000000	USD
CY2012	us-gaap	Payments For Federal Home Loan Bank Advances PaymentsForFederalHomeLoanBankAdvances	100000000	USD
CY2012	us-gaap	Debt Instrument Issuance Date1 DebtInstrumentIssuanceDate1	2012-04-09
CY2012	us-gaap	Debt Instrument Maturity Date DebtInstrumentMaturityDate	2012-07-09
CY2012Q4	us-gaap	Line Of Credit Facility Amount Outstanding LineOfCreditFacilityAmountOutstanding	0	USD
CY2012	us-gaap	Line Of Credit Facility Expiration Date1 LineOfCreditFacilityExpirationDate1	2016-09-29
CY2012Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	2000000000	USD
CY2012	us-gaap	Debt Instrument Convertible Earliest Date1 DebtInstrumentConvertibleEarliestDate1	2042-04-15
CY2012Q4	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.00206	pure
CY2009Q1	wlp	Increase In Shares Available Incentive Plan IncreaseInSharesAvailableIncentivePlan	33000000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	60100000	shares
CY2012Q4	us-gaap	Business Acquisition Cost Of Acquired Entity Other Noncash Consideration BusinessAcquisitionCostOfAcquiredEntityOtherNoncashConsideration	19700000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	52000000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	48600000	USD
CY2010	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	45900000	USD
CY2012	wlp	Stock Option Term StockOptionTerm	7	pure
CY2012	wlp	Stock Incentive Plan Vesting Period Years StockIncentivePlanVestingPeriodYears	3	pure
CY2012	wlp	Common Stock Purchased Under Stock Purchase Plan CommonStockPurchasedUnderStockPurchasePlan	0	shares
CY2011	wlp	Common Stock Purchased Under Stock Purchase Plan CommonStockPurchasedUnderStockPurchasePlan	0	shares
CY2012	wlp	Compensation Cost Due To Stock Purchase Plan CompensationCostDueToStockPurchasePlan	0	USD
CY2011	wlp	Compensation Cost Due To Stock Purchase Plan CompensationCostDueToStockPurchasePlan	0	USD
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	20000000	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	1800000	shares
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	-2700000	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	-1500000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	17800000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	15300000	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	62.30
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	66.23
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	41.71
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	73.21
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	64.67
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	64.75
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	85100000	USD
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	82200000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Other Increases Decreases In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriod	200000	shares
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Other Share Increase Decrease In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOtherShareIncreaseDecreaseInPeriodWeightedAverageExercisePrice	42.23
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y4M
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y0M
CY2010	us-gaap	Tax Benefit From Stock Options Exercised1 TaxBenefitFromStockOptionsExercised1	25200000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	65400000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	115800000	USD
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	66900000	USD
CY2012	us-gaap	Tax Benefit From Stock Options Exercised1 TaxBenefitFromStockOptionsExercised1	22900000	USD
CY2011	us-gaap	Tax Benefit From Stock Options Exercised1 TaxBenefitFromStockOptionsExercised1	42900000	USD
CY2012Q4	wlp	Fair Value Shares Vested FairValueSharesVested	222300000	USD
CY2011Q4	wlp	Fair Value Shares Vested FairValueSharesVested	120200000	USD
CY2010Q4	wlp	Fair Value Shares Vested FairValueSharesVested	93500000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Cash Received From Exercise Of Stock Options EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions	110800000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Cash Received From Exercise Of Stock Options EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions	245000000	USD
CY2010	us-gaap	Employee Service Share Based Compensation Cash Received From Exercise Of Stock Options EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions	95300000	USD
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	4000000	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	1800000	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	-3500000	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	-400000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	2600000	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	56.00
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	65.91
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	55.37
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	65.28
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	63.87
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Other ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOther	700000	shares
CY2012	wlp	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Other Weighted Average Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOtherWeightedAverageFairValue	61.07
CY2012Q4	wlp	Performance Restricted Stock Units Granted PerformanceRestrictedStockUnitsGranted	800000	shares
CY2012Q4	wlp	Performance Restricted Stock Units Earned PerformanceRestrictedStockUnitsEarned	700000	shares
CY2012Q4	wlp	Employee Service Share Based Compensation Unrecognized Compensation Costs On Nonvested Options EmployeeServiceShareBasedCompensationUnrecognizedCompensationCostsOnNonvestedOptions	15400000	USD
CY2012	wlp	Employee Service Share Based Compensation Unrecognized Compensation Costs On Nonvested Stock EmployeeServiceShareBasedCompensationUnrecognizedCompensationCostsOnNonvestedStock	90200000	USD
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	28900000	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0141	pure
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0284	pure
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0309	pure
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.3400	pure
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.3400	pure
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.3400	pure
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0160	pure
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0150	pure
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0	pure
CY2010	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y0M
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	16.50
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	17.84
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	18.76
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	66.16
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	61.38
CY2012	wlp	Share Based Compensation Arrangement By Share Based Payment Employee Purchase Plan Grants In Period Weighted Average Grant Date Fair Value For Period ShareBasedCompensationArrangementByShareBasedPaymentEmployeePurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueForPeriod	0
CY2011	wlp	Share Based Compensation Arrangement By Share Based Payment Employee Purchase Plan Grants In Period Weighted Average Grant Date Fair Value For Period ShareBasedCompensationArrangementByShareBasedPaymentEmployeePurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueForPeriod	0
CY2010	wlp	Share Based Compensation Arrangement By Share Based Payment Employee Purchase Plan Grants In Period Weighted Average Grant Date Fair Value For Period ShareBasedCompensationArrangementByShareBasedPaymentEmployeePurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueForPeriod	8.64
CY2012Q4	wlp	Employee Stock Purchase Plan Number Of Shares Authorized EmployeeStockPurchasePlanNumberOfSharesAuthorized	14000000	shares
CY2010	wlp	Common Stock Purchased Under Stock Purchase Plan CommonStockPurchasedUnderStockPurchasePlan	1000000	shares
CY2010	wlp	Compensation Cost Due To Stock Purchase Plan CompensationCostDueToStockPurchasePlan	8500000	USD
CY2010	wlp	Shares Available For Issuance Under Stock Purchase Plan SharesAvailableForIssuanceUnderStockPurchasePlan	6100000	shares
CY2012Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.2875
CY2012Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.2875
CY2012Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.2875
CY2012Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.2875
CY2011Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.25
CY2011Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.25
CY2011Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.25
CY2011Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.25
CY2012Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	95800000	USD
CY2012Q2	us-gaap	Payments Of Dividends PaymentsOfDividends	93500000	USD
CY2012Q3	us-gaap	Payments Of Dividends PaymentsOfDividends	90700000	USD
CY2012Q4	us-gaap	Payments Of Dividends PaymentsOfDividends	87100000	USD
CY2011Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	92800000	USD
CY2011Q2	us-gaap	Payments Of Dividends PaymentsOfDividends	91100000	USD
CY2011Q3	us-gaap	Payments Of Dividends PaymentsOfDividends	88200000	USD
CY2011Q4	us-gaap	Payments Of Dividends PaymentsOfDividends	85700000	USD
CY2012Q1	us-gaap	Dividends Payable Date Declared Day Month And Year DividendsPayableDateDeclaredDayMonthAndYear	2012-01-24
CY2012Q2	us-gaap	Dividends Payable Date Declared Day Month And Year DividendsPayableDateDeclaredDayMonthAndYear	2012-05-16
CY2012Q3	us-gaap	Dividends Payable Date Declared Day Month And Year DividendsPayableDateDeclaredDayMonthAndYear	2012-07-24
CY2012Q4	us-gaap	Dividends Payable Date Declared Day Month And Year DividendsPayableDateDeclaredDayMonthAndYear	2012-11-06
CY2011Q1	us-gaap	Dividends Payable Date Declared Day Month And Year DividendsPayableDateDeclaredDayMonthAndYear	2011-02-22
CY2011Q2	us-gaap	Dividends Payable Date Declared Day Month And Year DividendsPayableDateDeclaredDayMonthAndYear	2011-05-17
CY2011Q3	us-gaap	Dividends Payable Date Declared Day Month And Year DividendsPayableDateDeclaredDayMonthAndYear	2011-07-26
CY2011Q4	us-gaap	Dividends Payable Date Declared Day Month And Year DividendsPayableDateDeclaredDayMonthAndYear	2011-10-25
CY2012Q1	us-gaap	Dividends Payable Date Of Record Day Month And Year DividendsPayableDateOfRecordDayMonthAndYear	2012-03-09
CY2012Q2	us-gaap	Dividends Payable Date Of Record Day Month And Year DividendsPayableDateOfRecordDayMonthAndYear	2012-06-08
CY2012Q3	us-gaap	Dividends Payable Date Of Record Day Month And Year DividendsPayableDateOfRecordDayMonthAndYear	2012-09-10
CY2012Q4	us-gaap	Dividends Payable Date Of Record Day Month And Year DividendsPayableDateOfRecordDayMonthAndYear	2012-12-07
CY2011Q1	us-gaap	Dividends Payable Date Of Record Day Month And Year DividendsPayableDateOfRecordDayMonthAndYear	2011-03-10
CY2011Q3	us-gaap	Dividends Payable Date Of Record Day Month And Year DividendsPayableDateOfRecordDayMonthAndYear	2011-09-09
CY2013Q1	us-gaap	Dividends Payable Date Of Record Day Month And Year DividendsPayableDateOfRecordDayMonthAndYear	2013-03-08
CY2011Q2	us-gaap	Dividends Payable Date Of Record Day Month And Year DividendsPayableDateOfRecordDayMonthAndYear	2011-06-10
CY2011Q4	us-gaap	Dividends Payable Date Of Record Day Month And Year DividendsPayableDateOfRecordDayMonthAndYear	2011-12-09
CY2012Q1	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2012-03-23
CY2012Q2	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2012-06-25
CY2012Q3	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2012-09-25
CY2012Q4	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2012-12-21
CY2011Q1	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2011-03-25
CY2011Q2	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2011-06-24
CY2011Q3	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2011-09-23
CY2011Q4	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2011-12-23
CY2013Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.3750
CY2013Q1	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2013-03-25
CY2012	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	39.7	shares
CY2011	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	44.5	shares
CY2013Q1	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	1.1	shares
CY2013Q1	wlp	Stock Repurchased And Retired During Period Average Price StockRepurchasedAndRetiredDuringPeriodAveragePrice	59.01
CY2012	wlp	Stock Repurchased And Retired During Period Average Price StockRepurchasedAndRetiredDuringPeriodAveragePrice	62.96
CY2011	wlp	Stock Repurchased And Retired During Period Average Price StockRepurchasedAndRetiredDuringPeriodAveragePrice	68.34
CY2013Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	64400000	USD
CY2013Q1	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount	1772500000	USD
CY2012	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount	1836900000	USD
CY2011	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount	4333700000	USD
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	-47900000	USD
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Gain Loss AvailableForSaleSecuritiesGrossUnrealizedGainLoss	1234200000	USD
CY2012Q4	wlp	Available For Sale Securities Accumulated Other Comprehensive Income Net Deferred Tax Asset AvailableForSaleSecuritiesAccumulatedOtherComprehensiveIncomeNetDeferredTaxAsset	-430500000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	803700000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Availableforsale Debt Securities AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxAvailableforsaleDebtSecurities	-3400000	USD
CY2012Q4	wlp	Available For Sale Securities Other Than Temporary Impairments In Accumulated Other Comprehensive Income Deferred Tax Liability Asset AvailableForSaleSecuritiesOtherThanTemporaryImpairmentsInAccumulatedOtherComprehensiveIncomeDeferredTaxLiabilityAsset	1200000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Debt Securities AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxDebtSecurities	-2200000	USD
CY2012	us-gaap	Unrealized Gain Loss On Cash Flow Hedging Instruments UnrealizedGainLossOnCashFlowHedgingInstruments	-54300000	USD
CY2012Q4	wlp	Cash Flow Hedging Instruments Accumulated Other Comprehensive Income Net Deferred Tax Asset CashFlowHedgingInstrumentsAccumulatedOtherComprehensiveIncomeNetDeferredTaxAsset	19000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-35300000	USD
CY2012Q4	wlp	Defined Benefit Plan Accumulated Other Comprehensive Income Net Deferred Tax Asset DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetDeferredTaxAsset	269100000	USD
CY2012Q4	wlp	Defined Benefit Plan Accumulated Other Comprehensive Income Adjustments Net Of Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAdjustmentsNetOfTax	-413800000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	34600000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-53400000	USD
CY2012	wlp	Accumulated Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax AccumulatedOtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	200000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Unrealized Currency Losses DeferredTaxAssetsUnrealizedCurrencyLosses	-100000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	100000	USD
CY2011Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	-161600000	USD
CY2011Q4	us-gaap	Available For Sale Securities Gross Unrealized Gain Loss AvailableForSaleSecuritiesGrossUnrealizedGainLoss	945500000	USD
CY2011Q4	wlp	Available For Sale Securities Accumulated Other Comprehensive Income Net Deferred Tax Asset AvailableForSaleSecuritiesAccumulatedOtherComprehensiveIncomeNetDeferredTaxAsset	-331900000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	613600000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Availableforsale Debt Securities AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxAvailableforsaleDebtSecurities	-10300000	USD
CY2011Q4	wlp	Available For Sale Securities Other Than Temporary Impairments In Accumulated Other Comprehensive Income Deferred Tax Liability Asset AvailableForSaleSecuritiesOtherThanTemporaryImpairmentsInAccumulatedOtherComprehensiveIncomeDeferredTaxLiabilityAsset	3600000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Debt Securities AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxDebtSecurities	-6700000	USD
CY2011	us-gaap	Unrealized Gain Loss On Cash Flow Hedging Instruments UnrealizedGainLossOnCashFlowHedgingInstruments	-54400000	USD
CY2011Q4	wlp	Cash Flow Hedging Instruments Accumulated Other Comprehensive Income Net Deferred Tax Asset CashFlowHedgingInstrumentsAccumulatedOtherComprehensiveIncomeNetDeferredTaxAsset	19100000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-35300000	USD
CY2011Q4	wlp	Defined Benefit Plan Accumulated Other Comprehensive Income Net Deferred Tax Asset DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetDeferredTaxAsset	262800000	USD
CY2011Q4	wlp	Defined Benefit Plan Accumulated Other Comprehensive Income Adjustments Net Of Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAdjustmentsNetOfTax	-386200000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	48000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-70200000	USD
CY2011	wlp	Accumulated Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax AccumulatedOtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-500000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Unrealized Currency Losses DeferredTaxAssetsUnrealizedCurrencyLosses	200000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-300000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	193100000	USD
CY2012	us-gaap	Available For Sale Securities Income Tax Expense On Change In Unrealized Holding Gain Or Loss AvailableForSaleSecuritiesIncomeTaxExpenseOnChangeInUnrealizedHoldingGainOrLoss	-5400000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	104000000	USD
CY2012	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterest	2400000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	100000	USD
CY2012	wlp	Other Net Change In Unrecognized Periodic Benefit Costs For Defined Benefit Pension And Postretirement Benefit Plans Tax Benefit Expense OtherNetChangeInUnrecognizedPeriodicBenefitCostsForDefinedBenefitPensionAndPostretirementBenefitPlansTaxBenefitExpense	7100000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	300000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	108500000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	92200000	USD
CY2011	us-gaap	Available For Sale Securities Income Tax Expense On Change In Unrealized Holding Gain Or Loss AvailableForSaleSecuritiesIncomeTaxExpenseOnChangeInUnrealizedHoldingGainOrLoss	-38200000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	49600000	USD
CY2011	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterest	-500000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-5300000	USD
CY2011	wlp	Other Net Change In Unrecognized Periodic Benefit Costs For Defined Benefit Pension And Postretirement Benefit Plans Tax Benefit Expense OtherNetChangeInUnrecognizedPeriodicBenefitCostsForDefinedBenefitPensionAndPostretirementBenefitPlansTaxBenefitExpense	-81700000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	200000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-75900000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	100200000	USD
CY2010	us-gaap	Available For Sale Securities Income Tax Expense On Change In Unrealized Holding Gain Or Loss AvailableForSaleSecuritiesIncomeTaxExpenseOnChangeInUnrealizedHoldingGainOrLoss	-8900000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	54500000	USD
CY2010	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterest	9000000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-8100000	USD
CY2010	wlp	Other Net Change In Unrecognized Periodic Benefit Costs For Defined Benefit Pension And Postretirement Benefit Plans Tax Benefit Expense OtherNetChangeInUnrecognizedPeriodicBenefitCostsForDefinedBenefitPensionAndPostretirementBenefitPlansTaxBenefitExpense	22300000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-800000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	68000000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-3200000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-71600000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	24900000	USD
CY2012	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	-4500000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	100000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	10900000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	600000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	184200000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-109700000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	156500000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	200000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1700000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	119800000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-32900000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-10000000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-14500000	USD
CY2011	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	700000	USD
CY2010	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	-14700000	USD
CY2012	us-gaap	Direct Premiums Written DirectPremiumsWritten	56443600000	USD
CY2011	us-gaap	Direct Premiums Written DirectPremiumsWritten	56190300000	USD
CY2010	us-gaap	Direct Premiums Written DirectPremiumsWritten	54114300000	USD
CY2012	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	197000000	USD
CY2011	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	179900000	USD
CY2010	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	86700000	USD
CY2012	us-gaap	Ceded Premiums Written CededPremiumsWritten	-73200000	USD
CY2011	us-gaap	Ceded Premiums Written CededPremiumsWritten	-84200000	USD
CY2010	us-gaap	Ceded Premiums Written CededPremiumsWritten	-91300000	USD
CY2012	us-gaap	Premiums Written Net PremiumsWrittenNet	56567400000	USD
CY2011	us-gaap	Premiums Written Net PremiumsWrittenNet	56286000000	USD
CY2010	us-gaap	Premiums Written Net PremiumsWrittenNet	54109700000	USD
CY2012	wlp	Direct Premiums Earned DirectPremiumsEarned	56373600000	USD
CY2011	wlp	Direct Premiums Earned DirectPremiumsEarned	55875800000	USD
CY2010	wlp	Direct Premiums Earned DirectPremiumsEarned	53982800000	USD
CY2012	wlp	Assumed Premiums Earned AssumedPremiumsEarned	196400000	USD
CY2011	wlp	Assumed Premiums Earned AssumedPremiumsEarned	178500000	USD
CY2010	wlp	Assumed Premiums Earned AssumedPremiumsEarned	82700000	USD
CY2012	wlp	Ceded Premiums Earned CededPremiumsEarned	-73300000	USD
CY2011	wlp	Ceded Premiums Earned CededPremiumsEarned	-84700000	USD
CY2010	wlp	Ceded Premiums Earned CededPremiumsEarned	-91900000	USD
CY2012	wlp	Percentage Of Amount Assumed To Net Premiums Written PercentageOfAmountAssumedToNetPremiumsWritten	0.003	pure
CY2011	wlp	Percentage Of Amount Assumed To Net Premiums Written PercentageOfAmountAssumedToNetPremiumsWritten	0.003	pure
CY2010	wlp	Percentage Of Amount Assumed To Net Premiums Written PercentageOfAmountAssumedToNetPremiumsWritten	0.002	pure
CY2010	wlp	Percentage Of Amount Assumed To Net Premiums Earned PercentageOfAmountAssumedToNetPremiumsEarned	0.002	pure
CY2011	wlp	Percentage Of Amount Assumed To Net Premiums Earned PercentageOfAmountAssumedToNetPremiumsEarned	0.003	pure
CY2012	wlp	Percentage Of Amount Assumed To Net Premiums Earned PercentageOfAmountAssumedToNetPremiumsEarned	0.003	pure
CY2012	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	48135100000	USD
CY2011	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	47569800000	USD
CY2010	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	44952800000	USD
CY2012	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	173000000	USD
CY2011	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	165000000	USD
CY2010	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	71000000	USD
CY2012	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	94500000	USD
CY2011	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	87300000	USD
CY2010	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	93400000	USD
CY2012	wlp	Assumed Policy Liabilities AssumedPolicyLiabilities	62400000	USD
CY2011	wlp	Assumed Policy Liabilities AssumedPolicyLiabilities	70400000	USD
CY2012	wlp	Assumed Unearned Income AssumedUnearnedIncome	500000	USD
CY2011	wlp	Assumed Unearned Income AssumedUnearnedIncome	500000	USD
CY2012Q4	us-gaap	Ceded Premiums Payable CededPremiumsPayable	18100000	USD
CY2011Q4	us-gaap	Ceded Premiums Payable CededPremiumsPayable	14700000	USD
CY2012Q4	wlp	Assumed Premiums Receivable AssumedPremiumsReceivable	16600000	USD
CY2011Q4	wlp	Assumed Premiums Receivable AssumedPremiumsReceivable	18600000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	128700000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	123200000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	108700000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	87600000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	83400000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	270200000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	801800000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	153300000	USD
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	148600000	USD
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	187300000	USD
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	321500000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	360200000	shares
CY2012	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3300000	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	324800000	shares
CY2011	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	4900000	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	365100000	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	410900000	shares
CY2010	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	4900000	shares
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	415800000	shares
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	12600000	shares
CY2011	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	10500000	shares
CY2010	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	17400000	shares
CY2011	wlp	Percentage Of Revenue Generated From Participation In Various Federal Government Programs PercentageOfRevenueGeneratedFromParticipationInVariousFederalGovernmentPrograms	0.235	pure
CY2010	wlp	Percentage Of Revenue Generated From Participation In Various Federal Government Programs PercentageOfRevenueGeneratedFromParticipationInVariousFederalGovernmentPrograms	0.219	pure
CY2012	wlp	Percentage Of Revenue Generated From Participation In Various Federal Government Programs PercentageOfRevenueGeneratedFromParticipationInVariousFederalGovernmentPrograms	0.236	pure
CY2012	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	369000000	USD
CY2011	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	300300000	USD
CY2010	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	297400000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	3639200000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	3782100000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	4077500000	USD
CY2012	wlp	Contribution Made To Related Party ContributionMadeToRelatedParty	0	USD
CY2011	wlp	Contribution Made To Related Party ContributionMadeToRelatedParty	0	USD
CY2010	wlp	Contribution Made To Related Party ContributionMadeToRelatedParty	0	USD
CY2010	wlp	Amount Received From Related Party AmountReceivedFromRelatedParty	600000	USD
CY2011	wlp	Amount Received From Related Party AmountReceivedFromRelatedParty	600000	USD
CY2012	wlp	Amount Received From Related Party AmountReceivedFromRelatedParty	600000	USD
CY2012Q1	us-gaap	Revenues Revenues	15415200000	USD
CY2012Q2	us-gaap	Revenues Revenues	15407300000	USD
CY2012Q3	us-gaap	Revenues Revenues	15353100000	USD
CY2012Q4	us-gaap	Revenues Revenues	15536100000	USD
CY2011Q1	us-gaap	Revenues Revenues	14894300000	USD
CY2011Q2	us-gaap	Revenues Revenues	15100700000	USD
CY2011Q3	us-gaap	Revenues Revenues	15398000000	USD
CY2011Q4	us-gaap	Revenues Revenues	15317700000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1309800000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1048600000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1025700000	USD
CY2012Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	481400000	USD
CY2011Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1427100000	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1007400000	USD
CY2011Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1045200000	USD
CY2011Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	478200000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	856500000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	643600000	USD
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	691200000	USD
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	464200000	USD
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	926600000	USD
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	701600000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	683200000	USD
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	335300000	USD
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.56
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.96
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.17
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.52
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.48
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.92
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.92
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.97
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.53
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.94
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.15
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.51
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.44
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.89
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.90
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.96

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$ELV
Elevance Health, Inc. Stock $elv

2013 Q1 Form 10-K Financial Statement

#000119312513071165 Filed on February 22, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ELV Elevance Health, Inc. Stock $elv

2013 Q1 Form 10-K Financial Statement

#000119312513071165 Filed on February 22, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ELV
Elevance Health, Inc. Stock $elv