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

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

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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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.

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Long-term Debt - Narrative (Details)	9 Months Ended
Long-term Debt - Narrative (Details)	Sep. 30, 2019 USD ($)	Sep. 30, 2019 EUR (€)	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Debt Disclosure [Abstract]
Aggregate outstanding principal			$ 12,425,746,000	$ 10,360,058,000
Debt issuance costs			99,000,000
Debt Instrument [Line Items]
Principal amount at par			12,525,000,000
Senior Notes
Debt Instrument [Line Items]
Principal amount at par \| €		€ 3,600,000,000
Redemption prices, percent of outstanding principal	101.00%
Senior Notes \| 3.625% Senior Notes
Debt Instrument [Line Items]
Principal amount at par		1,300,000,000	1,418,000,000
Proceeds from convertible debt	$ 1,421,000,000
Senior Notes \| 4.625% Senior Notes
Debt Instrument [Line Items]
Principal amount at par		1,100,000,000	1,199,000,000
Proceeds from convertible debt	1,262,000,000
Senior Notes \| 3.875% Senior Notes
Debt Instrument [Line Items]
Principal amount at par		€ 1,200,000,000	$ 1,308,000,000
Proceeds from convertible debt	$ 1,343,000,000