Schedule II-Condensed Financial Information Of Registrant (Narrative) (Details) (Anthem, Inc. [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Anthem, Inc. [Member]
Cash dividends received from subsidiaries	$ 3,234.5	$ 3,046.5	$ 2,935.1
Cash dividends paid to subsidiaries	20.9	17.9	13.8
Capital contribution to subsidiaries	321.8	121.2	6,085.1
Amounts due from subsidiaries	$ 327.3	$ 893.4