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Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2018
Subsequent Events [Abstract]
Subsequent events	SUBSEQUENT EVENTS On August 9, 2018, we announced a plan to separate our RX business. We intend to begin the preparations for a spin-off of the RX business to shareholders and will also remain open to other value-enhancing options, including a possible sale, merger or other form of separation. We currently expect the separation of the RX business to be completed during the second half of 2019.