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Stockholders' Equity (Schedule of Impact of Noncontrolling Interest to Stockholders' Equity) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Stockholders' Equity [Abstract]    
Net loss attributable to Community Health Systems, Inc. stockholders $ 79us-gaap_NetIncomeLoss $ (112)us-gaap_NetIncomeLoss
Change to Community Health Systems, Inc. stockholders' equity from net loss attributable to Community Health Systems, Inc. stockholders and transfers to noncontrolling interests $ 79us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet