Conversion price per share.

No definition available.

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- Definition

Debt instrument convertible conversion price percentage.

+ References

No definition available.

+ Details

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- Definition

The number of shares we purchase under note hedge transactions entered.

+ References

No definition available.

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- Definition

The cost of the convertible note hedge transactions.

+ References

No definition available.

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- Definition

Percentage of principal amount of convertible notes is equal to repurchase price.

+ References

No definition available.

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- Definition

Purchase price per common stock.

+ References

No definition available.

+ Details

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- Definition

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

+ References

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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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

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)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

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- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
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- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031897-161870

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

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- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

+ References

No definition available.

+ Details

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Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

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.

+ References

No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
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- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

No definition available.

+ Details

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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 and Long-Term Debt Obligations - 2019 Notes, 2021 Notes, Bond Hedges and Warrant Transactions - Additional Information (Detail)	1 Months Ended		12 Months Ended
	Apr. 30, 2014 USD ($) $ / shares shares	Mar. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) d $ / shares shares
Debt Instrument [Line Items]
Proceeds from issuance of warrants			$ 52,883,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate			6.00%
Payment for purchase of common stock \| shares		5,600,000
Common stock purchase price \| $ / shares		$ 359.87
Hedge transactions		$ 524,700,000
Senior Notes [Member] \| Warrants [Member]
Debt Instrument [Line Items]
Hedge transactions	$ 78,700,000
Proceeds from issuance of warrants	50,800,000
Senior Notes [Member] \| 0.25% Convertible Senior Notes due in 2019 ("2019 Notes") [Member]
Debt Instrument [Line Items]
Principal amount of convertible senior notes	$ 120,000,000	$ 800,000,000
Interest Rate		0.25%
Maturity Dates			Mar. 31, 2019
Proceeds from convertible senior notes, net of underwriting discounts and issuance costs			$ 905,800,000
Debt conversion, converted instrument, amount			$ 188,100,000
Debt instrument, effective interest rate			4.89%
Shares issued under warrants \| shares	300,000	2,200,000
Exercise price of warrant \| $ / shares	$ 512.66	$ 512.66
Senior Notes [Member] \| 0.25% Convertible Senior Notes due in 2019 ("2019 Notes") [Member] \| Minimum [Member] \| Warrants [Member]
Debt Instrument [Line Items]
Conversion price per share \| $ / shares	359.87
Senior Notes [Member] \| 0.25% Convertible Senior Notes due in 2019 ("2019 Notes") [Member] \| Maximum [Member] \| Warrants [Member]
Debt Instrument [Line Items]
Conversion price per share \| $ / shares	$ 512.66
Senior Notes [Member] \| 1.25% Convertible Senior Notes in due 2021 [Member]
Debt Instrument [Line Items]
Principal amount of convertible senior notes	$ 180,000,000	$ 1,200,000,000
Interest Rate		1.25%
Maturity Dates			Mar. 31, 2021
Proceeds from convertible senior notes, net of underwriting discounts and issuance costs			$ 1,360,000,000
Debt conversion, converted instrument, amount			$ 369,400,000
Debt instrument, effective interest rate			5.96%
Shares issued under warrants \| shares	500,000	3,300,000
Exercise price of warrant \| $ / shares	$ 560.64	$ 560.64
Proceeds from issuance of warrants		$ 338,400,000
Senior Notes [Member] \| 1.25% Convertible Senior Notes in due 2021 [Member] \| Minimum [Member] \| Warrants [Member]
Debt Instrument [Line Items]
Conversion price per share \| $ / shares	359.87
Senior Notes [Member] \| 1.25% Convertible Senior Notes in due 2021 [Member] \| Maximum [Member] \| Warrants [Member]
Debt Instrument [Line Items]
Conversion price per share \| $ / shares	$ 560.64
Senior Notes [Member] \| 0.25% and 1.25% Convertible Senior Notes and Bond Hedge and Warrant Transactions [Member]
Debt Instrument [Line Items]
Convertible principal amount			$ 1,000
Convertible instrument, shares issued \| shares			2.7788
Convertible notes, conversion price \| $ / shares			$ 359.87
Debt instrument convertible, percentage of conversion price			130.00%
Product percentage of closing sale price of common stock			98.00%
Percentage of repurchase price is equal to principal amount of convertible notes			100.00%
Senior Notes [Member] \| 0.25% and 1.25% Convertible Senior Notes and Bond Hedge and Warrant Transactions [Member] \| One Hundred Thirty Percent Applicable Conversion Price [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument convertible consecutive trading days \| d			20
Senior Notes [Member] \| 0.25% and 1.25% Convertible Senior Notes and Bond Hedge and Warrant Transactions [Member] \| One Hundred Thirty Percent Applicable Conversion Price [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument convertible trading days \| d			30
Senior Notes [Member] \| 0.25% and 1.25% Convertible Senior Notes and Bond Hedge and Warrant Transactions [Member] \| Ninety Eight Percent Applicable Conversion Price
Debt Instrument [Line Items]
Debt instrument convertible consecutive trading days \| d			5