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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
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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

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

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- Definition

The cash inflow from the issuance 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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Long-term Debt - Summary of Long-term Debt (Details)	3 Months Ended		6 Months Ended
Long-term Debt - Summary of Long-term Debt (Details)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 EUR (€)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Principal amount at par						$ 4,884,700,000
Foreign currency remeasurement loss on long-term debt	$ 64,220,000	$ 0	$ 64,220,000	$ 0
Senior Notes \| 3.625% Senior Notes
Debt Instrument [Line Items]
Principal amount at par					€ 1,300,000,000.0	1,484,700,000.0
Fair value						$ 1,513,000,000	$ 0
Interest rate					3.625%	3.625%
Proceeds from convertible debt			1,420,500,000
Foreign currency remeasurement loss on long-term debt			$ 64,200,000
Senior Notes \| 4.375% Senior Notes
Debt Instrument [Line Items]
Principal amount at par						$ 1,000,000,000
Fair value						$ 1,004,000,000	975,000,000
Interest rate					4.375%	4.375%
Senior Notes \| 5.50% Senior Notes
Debt Instrument [Line Items]
Principal amount at par						$ 700,000,000
Fair value						$ 762,000,000	758,000,000
Interest rate					5.50%	5.50%
Senior Notes \| 5.875% Senior Notes
Debt Instrument [Line Items]
Principal amount at par						$ 800,000,000
Fair value						$ 888,000,000	868,000,000
Interest rate					5.875%	5.875%
Senior Notes \| 5.750% Senior Notes
Debt Instrument [Line Items]
Principal amount at par						$ 400,000,000
Fair value						$ 438,000,000	431,000,000
Interest rate					5.75%	5.75%
Senior Notes \| 5.375% Senior Notes
Debt Instrument [Line Items]
Principal amount at par						$ 500,000,000
Fair value						$ 541,000,000	$ 539,000,000
Interest rate					5.375%	5.375%