Adjustments to additional paid in capital increase (decrease) in stock split.

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- Definition

Conversion price per share.

+ References

No definition available.

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- Definition

Debt conversion converted for cash.

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No definition available.

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- Definition

Debt instrument convertible conversion price percentage.

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No definition available.

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- Definition

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

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No definition available.

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- Definition

The cost of the convertible note hedge transactions.

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No definition available.

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- Definition

Number of common shares received.

+ 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.

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- Definition

Reclassifications of temporary equity to equity component of debt instrument.

+ References

No definition available.

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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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

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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

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
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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.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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- Definition

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

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

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- Definition

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

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-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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- Definition

The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

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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.

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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.

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No definition available.

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- Definition

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

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-Name Accounting Standards Codification
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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.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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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

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

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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).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
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Debt - 2021 Notes, Bond Hedges and Warrant Transactions - Additional Information (Detail)	1 Months Ended		3 Months Ended	12 Months Ended
	Apr. 30, 2014 USD ($) $ / shares	Mar. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2020 d shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Hedge transactions		$ 398,000,000
Proceeds from issuance of warrants		257,000,000			$ 174,000,000
Minimum [Member]
Debt Instrument [Line Items]
Debt instrument convertible, percentage of conversion price			130.00%
Minimum [Member] \| One Hundred Thirty Percent Applicable Conversion Price [Member]
Debt Instrument [Line Items]
Debt instrument convertible consecutive trading days \| d			20
Maximum [Member] \| One Hundred Thirty Percent Applicable Conversion Price [Member]
Debt Instrument [Line Items]
Debt instrument convertible trading days \| d			30
1.25% Convertible Senior Notes due in 2021 ("2021 Notes") [Member]
Debt Instrument [Line Items]
Principal amount of convertible senior notes	$ 180,000,000	1,200,000,000
Proceeds from convertible senior notes, net of underwriting discounts and issuance costs	$ 1,360,000,000
Convertible principal amount				$ 958,000,000
Shares issued upon conversion of each $1000 principal amount \| shares				11,100,000
Debt conversion, converted instrument, amount		$ 369,000,000
Debt instrument, effective interest rate		5.96%
Payment for purchase of common stock \| shares		19,200,000
Conversion price per share \| $ / shares		$ 71.97
Shares issued under warrants \| shares		19,200,000
Exercise price of warrant \| $ / shares		$ 112.13
Debt conversion converted for cash				$ 958,000,000
Increase (decrease) to additional paid in capital, stock split				$ (6,000,000)
Number of common shares received \| shares			11,100,000	11,100,000
Debt instrument convertible, if-converted value in excess of principal				$ 3,710,000,000
1.25% Convertible Senior Notes due in 2021 ("2021 Notes") [Member] \| Recourse debt [Member]
Debt Instrument [Line Items]
Difference between the aggregate principal and carrying value as mezzanine equity				$ 3,000,000
1.25% Convertible Senior Notes due in 2021 ("2021 Notes") [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Conversion price per share \| $ / shares	$ 71.97
1.25% Convertible Senior Notes due in 2021 ("2021 Notes") [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Conversion price per share \| $ / shares	$ 112.13
2021 Notes [Member]
Debt Instrument [Line Items]
Convertible principal amount		$ 1,000
Shares issued upon conversion of each $1000 principal amount \| shares		13.8940
Convertible notes, conversion price \| $ / shares		$ 71.97
Percentage of repurchase price is equal to principal amount of convertible notes		100.00%