Balance held at close of period in number of shares.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Subsequent Event (Details) (Subsequent Event, Mylan NV, USD $) Share data in Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Apr. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Subsequent Event \| Mylan NV
Subsequent event
Number of shares in investment sold	40.3
Net proceeds from sale of shares		$ 2,290,000,000
Number of shares owned			110
Gain (Loss) on Sale of Investments		$ 206,000,000