Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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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.

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The strike price on the price risk option contract such as a put option or a call option.

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- Definition

The cash outflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 27
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3581-108585

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- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
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Convertible Senior Notes, Warrants, and Hedges - Hedge and Warrant Transactions (Details) - JPMorgan Chase Bank, National Association $ / shares in Units, $ in Millions			9 Months Ended
	Nov. 03, 2015 USD ($) $ / option	Oct. 29, 2015 USD ($)	Dec. 31, 2017 USD ($)	Jul. 02, 2017 $ / shares
Initial Bond Hedge
Derivative [Line Items]
Payments for hedge		$ 81.9	$ 94.2
Bond hedge strike price (in dollars per share) \| $ / option	33.45
Initial Warrant Transaction
Derivative [Line Items]
Proceeds from issuance of warrants	$ 7.4	$ 49.4	$ 56.8
Initial strike price of warrants (in dollars per share) \| $ / shares				$ 48.66
Additional Bond Hedge
Derivative [Line Items]
Payments for hedge	$ 12.3