Additional payments to seller for remaining net operating losses used

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Net operating loss carryforwards to be paid to seller based upon tax savings realized from the future utilization of the Coram NOLs.

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Number of Locations Acquired

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Number of Patients

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The purchase price was subject to a working capital adjustment, resulting in the Company receiving money from Apria.

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Number of persons employed by the Entity

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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-Name Accounting Standards Codification

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Coram Acquisition (Details) (Coram LLC, USD $)	0 Months Ended	3 Months Ended	12 Months Ended
Coram Acquisition (Details) (Coram LLC, USD $)	Jan. 16, 2014	Sep. 30, 2014	Dec. 31, 2014 Patient
Coram Acquisition (Line items)
Net operating loss carryforwards to be paid to seller			$ 60,000,000
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Percentage of consolidated inventories affected by change in accounting principle	2,100,000,000
Decrease in inventories			240,000cvs_NumberofPatients
Business Combination, Contingent Consideration, Liability	100,000,000
Working Capital Adjustment		9,000,000cvs_WorkingCapitalAdjustment
Additional payments to seller for remaining net operating losses used			50.00%
Business Combination, Acquisition Related Costs			$ 15,000,000
Employee
Coram Acquisition (Line items)
Increase in current deferred income tax assets			4,600
Nurses
Coram Acquisition (Line items)
Increase in current deferred income tax assets			600
Dietitians
Coram Acquisition (Line items)
Increase in current deferred income tax assets			250
Branch location
Coram Acquisition (Line items)
Increase in net income	84
Centers of Excellence
Coram Acquisition (Line items)
Increase in net income	6