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Consolidated Statements of Income (Amounts Attributable to CIGNA)(Unaudited) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Consolidated Statements of Income        
Shareholders' net income $ 466 $ 183 $ 1,217 $ 987