Acquisitions and Other Investments - Rite Aid Merger (Details) - Rite Aid	Feb. 18, 2018 $ / shares
Business Acquisition [Line Items]
Conversion ratio in a merger	0.1000
Cash payment for Rite Aid common stockholder (in dollars per share)	$ 0.1832
Conversion ratio for common stockholders without cash payment	0.0079

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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