Schedule II-Condensed Financial Information Of Registrant (Statements Of Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net investment income									$ 659.1	$ 686.1	$ 703.7
Net realized losses on investments									271.9	334.9	235.1
Total other-than-temporary impairment losses on investments									(100.6)	(41.2)	(114.7)
Portion of other-than-temporary impairment losses recognized in other comprehensive income									1.7	3.4	21.4
Other-than-temporary impairment losses recognized in income									(98.9)	(37.8)	(93.3)
Other revenue									40.4	83.2	41.0
Total revenues	17,901.7	17,855.5	17,690.3	17,576.0	15,438.3	15,247.4	15,396.3	15,415.2	71,023.5	61,497.2	60,710.7
General and administrative expense									8,426.0	7,093.6	6,818.8
Interest expense									602.7	511.8	430.3
Loss on extinguishment of debt									145.3	0	0
Loss before income tax credits and equity in net income of subsidiaries									3,840.2	3,858.3	3,957.9
Net income	148.2	656.2	800.1	885.2	464.2	691.2	643.6	856.5	2,489.7	2,655.5	2,646.7
Wellpoint Inc [Member]
Net investment income									61.2	95.3	116.6
Net realized losses on investments									(83.2)	(28.5)	(17.9)
Total other-than-temporary impairment losses on investments									(51.6)	(15.3)	(18.3)
Portion of other-than-temporary impairment losses recognized in other comprehensive income									0.2	1.3	0.3
Other-than-temporary impairment losses recognized in income									(51.4)	(14.0)	(18.0)
Other revenue									4.4	3.5	3.1
Total revenues									(69.0)	56.3	83.8
General and administrative expense									196.6	211.9	53.4
Interest expense									598.4	507.0	407.3
Loss on extinguishment of debt									145.3	0	0
Total expenses									940.3	718.9	460.7
Loss before income tax credits and equity in net income of subsidiaries									(1,009.3)	(662.6)	(376.9)
Income tax credits									(369.7)	(172.1)	(207.0)
Equity in net income of subsidiaries									3,129.3	3,146.0	2,816.6
Net income									$ 2,489.7	$ 2,655.5	$ 2,646.7