Debt Instrument Conversion Circumstance, Number of Consecutive Trading Days

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- Definition

Debt Instrument Conversion Circumstance, Number of Trading Days

+ References

No definition available.

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- Definition

Ratio of Common Stock Closing Price to Debt Conversion Price, Percentage

+ References

No definition available.

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- Definition

Carrying amount of long-term convertible debt as of the balance sheet date, net of the amount due in the next twelve months or greater than the normal operating cycle, if longer. The debt is convertible into another form of financial instrument, typically the entity's common stock.

+ References

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
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- Definition

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

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- Definition

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

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-Publisher FASB
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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 a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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- Definition

The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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- Definition

Number of shares that have been repurchased and retired during the period.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Credit Facilities and Debt 1.25% Convertible Debentures due 2025 (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended				9 Months Ended	12 Months Ended			65 Months Ended
	Sep. 30, 2019	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2014	Jun. 30, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Nov. 01, 2017	Mar. 13, 2017	Dec. 07, 2015	Oct. 24, 2011
Debt Instrument [Line Items]
Long-term debt, face value	$ 2,137,000					$ 2,137,000	$ 2,437,000		$ 2,437,000
Proceeds from long-term debt, net of issuance costs						$ 0	$ 0	$ 837,482
Stock Repurchased and Retired During Period, Shares			5.8			8.2	9.7	5.8	64.3
Stock Repurchased During Period, Value			$ 99,100			$ 126,900	$ 136,100	$ 99,100	$ 1,070,000
Convertible Debentures 1.25% Due 2025 [Member]
Debt Instrument [Line Items]
Long-term debt, face value											$ 350,000
Proceeds from long-term debt, net of issuance costs					$ 343,600
Convertible Debt, Noncurrent											252,100
Debt Instrument, Convertible, Carrying Amount of Equity Component											$ 97,900
Debt Instrument, Convertible, Conversion Price											$ 22.22
Ratio of Common Stock Closing Price to Debt Conversion Price, Percentage	130.00%					130.00%
Convertible Debentures 1.25% Due 2025 [Member] \| Minimum
Debt Instrument [Line Items]
Debt Instrument Conversion Circumstance Number Of Trading Days						20 days
2.75% Convertible Debentures due November 1, 2031
Debt Instrument [Line Items]
Long-term debt, face value										$ 46,600		$ 395,500	$ 690,000
Proceeds from long-term debt, net of issuance costs							253,200
Repayments of Convertible Debt	$ 256,200	$ 331,200		$ 38,300		$ 17,800	$ 38,300	$ 256,200
Convertible Debt, Noncurrent													533,600
Debt Instrument, Convertible, Carrying Amount of Equity Component													$ 156,400
Debt Instrument, Convertible, Conversion Price													$ 32.30
2.75% Convertible Debentures due November 1, 2031 \| Minimum
Debt Instrument [Line Items]
Ratio of Common Stock Closing Price to Debt Conversion Price, Percentage	130.00%					130.00%
Debt Instrument Conversion Circumstance Number Of Trading Days						20 days
Ending on Last Trading Day of Previous Fiscal Quarter [Member] \| Convertible Debentures 1.25% Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument Conversion Circumstance Number Of Consecutive Trading Days						30 days
Ending on Last Trading Day of Previous Fiscal Quarter [Member] \| 2.75% Convertible Debentures due November 1, 2031
Debt Instrument [Line Items]
Debt Instrument Conversion Circumstance Number Of Consecutive Trading Days						30 days