Schedule II-Condensed Financial Information Of Registrant (Statement Of Cash Flows) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating activities
Net income	$ 2,489.7	$ 2,655.5	$ 2,646.7
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized losses on investments	(271.9)	(334.9)	(235.1)
Other-than-temporary impairment losses recognized in income	98.9	37.8	93.3
Loss on extinguishment of debt	145.3	0	0
Loss on disposal of assets	3.9	4.7	3.3
Deferred income taxes	59.1	127.5	74.3
Amortization, net of accretion	800.9	633.6	541.5
Depreciation	107.9	107.1	95.7
Share-based compensation cost	146.0	146.5	134.8
Excess tax benefits from share-based compensation	(30.1)	(28.8)	(42.2)
Changes in operating assets and liabilities, net of effect of business combinations:
Receivables, net	(418.3)	189.9	(401.8)
Other invested assets, current	(15.1)	(38.9)	(8.9)
Other assets	(33.6)	79.2	(259.2)
Accounts payable and accrued expenses	303.6	(406.5)	(208.7)
Other liabilities	(154.6)	(132.8)	(13.6)
Income taxes	9.3	(73.9)	(44.6)
Net cash provided by operating activities	3,052.3	2,744.6	3,374.4
Investing activities
Settlement of non-hedging derivatives	(109.8)	(59.8)	(96.6)
Changes in securities lending collateral	(405.1)	307.9	28.9
Other, net	1.3	3.1	(31.1)
Net cash used in investing activities	(2,234.4)	(4,551.6)	(942.0)
Financing activities
Net (repayments of) proceeds from commercial paper borrowings	(191.7)	(229.0)	463.6
Proceeds from long-term borrowings	1,250.0	6,468.9	1,097.4
Repayments of long term borrowings	(1,801.9)	(1,251.3)	(705.1)
Changes in securities lending payable	405.0	(307.8)	(29.0)
Changes in bank overdrafts	9.9	(17.6)	264.3
Premiums paid on equity options	(25.8)	0	0
Repurchase and retirement of common stock	(1,620.1)	(2,496.8)	(3,039.8)
Cash dividends	(448.0)	(367.1)	(357.8)
Proceeds from issuance of common stock under employee stock plans	524.7	110.8	245.0
Excess tax benefits from share-based compensation	30.1	28.8	42.2
Net cash (used in) provided by financing activities	(1,717.8)	2,088.9	(2,019.2)
Change in cash and cash equivalents	(897.7)	283.0	412.8
Cash and cash equivalents at beginning of year	2,475.3	2,201.6
Cash and cash equivalents of continuing operations at end of year	1,582.1	2,475.3	2,201.6
WellPoint, Inc. [Member]
Operating activities
Net income	2,489.7	2,655.5	2,646.7
Adjustments to reconcile net income to net cash provided by operating activities:
(Undistributed) distributed earnings of subsidiaries	(78.5)	(432.0)	399.3
Net realized losses on investments	83.2	28.5	17.9
Other-than-temporary impairment losses recognized in income	51.4	14.0	18.0
Loss on extinguishment of debt	145.3	0	0
Loss on disposal of assets	3.6	0	0
Deferred income taxes	(4.5)	49.2	95.3
Amortization, net of accretion	25.2	23.2	3.1
Depreciation	45.7	13.1	0.3
Share-based compensation cost	146.0	146.5	134.8
Excess tax benefits from share-based compensation	(30.1)	(28.8)	(42.2)
Changes in operating assets and liabilities, net of effect of business combinations:
Receivables, net	3.5	9.6	13.5
Other invested assets, current	(0.3)	0.2	4.6
Other assets	42.3	(31.7)	(52.0)
Amounts due (from) to subsidiaries	(983.1)	754.7	(497.2)
Accounts payable and accrued expenses	111.8	(34.5)	1.5
Other liabilities	(18.6)	8.9	(0.9)
Income taxes	83.9	(204.0)	35.3
Net cash provided by operating activities	2,116.5	2,972.4	2,778.0
Investing activities
Purchases of investments	(1,964.3)	(5,383.2)	(2,681.7)
Proceeds from sales, maturities, calls and redemptions of investments	2,443.3	5,554.5	3,689.6
Settlement of non-hedging derivatives	(109.8)	(59.8)	(96.6)
Capitalization of subsidiaries	(121.2)	(6,085.1)	(832.1)
Changes in securities lending collateral	(17.0)	73.8	17.3
(Purchases of) proceeds from sale of property and equipment, net	(87.4)	(117.1)	2.3
Other, net	(18.9)	(114.4)	(49.6)
Net cash used in investing activities	124.7	(6,131.3)	49.2
Financing activities
Net (repayments of) proceeds from commercial paper borrowings	(191.7)	(229.0)	463.7
Proceeds from long-term borrowings	1,250.0	6,468.9	1,097.4
Repayments of long term borrowings	(1,245.0)	(800.0)	(700.0)
Changes in securities lending payable	17.1	(72.7)	(17.3)
Changes in bank overdrafts	71.8	30.5	(66.9)
Premiums paid on equity options	(25.8)	0
Repurchase and retirement of common stock	(1,620.1)	(2,496.8)	(3,039.8)
Cash dividends	(465.9)	(380.9)	(369.8)
Proceeds from issuance of common stock under employee stock plans	524.7	110.8	245.0
Excess tax benefits from share-based compensation	30.1	28.8	42.2
Net cash (used in) provided by financing activities	(1,654.8)	2,659.6	(2,345.5)
Change in cash and cash equivalents	586.4	(499.3)	481.7
Cash and cash equivalents at beginning of year	588.1	1,087.4	605.7
Cash and cash equivalents of continuing operations at end of year	$ 1,174.5	$ 588.1	$ 1,087.4