Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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

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The average effective interest rate during the reporting period.

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

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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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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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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.

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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Commercial Paper, Weighted-Average Interest Rate Receivable

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Line of Credit Facility, Increases in Maximum Borrowing Capacity

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Line of Credit Facility, Increases in Maximum Borrowing Capacity, Total

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Maximum leverage ratio.

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Redemption price percentage.

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Credit Facilities and Long-Term Debt (Details Textual)		9 Months Ended	12 Months Ended
Credit Facilities and Long-Term Debt (Details Textual)	Sep. 20, 2011 USD ($)	Sep. 30, 2019	Dec. 31, 2019 USD ($)	Jun. 03, 2019 USD ($)	Jun. 03, 2019 EUR (€)	Mar. 05, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 26, 2018 USD ($)	Jan. 26, 2018 EUR (€)	Oct. 11, 2016 USD ($)	Mar. 11, 2016 EUR (€)	Mar. 27, 2015 USD ($)
Debt Instrument
Commercial paper			$ 0				$ 0
Interest rate during period			1.12%
European Investment Bank - Research and Development Finance Contract
Debt Instrument
Credit facility							125,000,000
Repayment on credit facility			$ 120,000,000
Term of debt			11 years
Basis spread			0.59%
Letter of Credit
Debt Instrument
Debt instrument aggregate principal amount												$ 100,000,000
Revolving Credit Facility
Debt Instrument
Increase in borrowing capacity												200,000,000
Maximum increase in borrowing capacity												800,000,000
Debt instrument aggregate principal amount												600,000,000
Commercial paper
Debt Instrument
Senior notes issued			$ 600,000,000
Senior Notes
Debt Instrument
Redemption price percentage	101.00%
Line of Credit
Debt Instrument
Interest on notes due								0.45%	0.45%
Senior notes issued								$ 251,000,000	€ 225,000,000
Long-term Line of Credit			0				257,000,000
Commercial paper
Debt Instrument
Outstanding balances			276,000,000				0
3.250% Senior Notes Due 2026
Debt Instrument
Fair value of senior notes due			518,000,000				476,000,000
Interest on notes due										3.25%
Senior notes issued										$ 500,000,000
Outstanding balances			$ 500,000,000				500,000,000
Risk Sharing Finance Facility Agreement
Debt Instrument
Term of debt			5 years
Risk Sharing Finance Facility Agreement \| Term Loans
Debt Instrument
Term of debt			12 years
4.875% Senior Notes Due 2021
Debt Instrument
Interest on notes due	4.875%
Senior notes issued	$ 600,000,000
Outstanding balances			$ 600,000,000				600,000,000
2.250% Senior Notes Due 2023
Debt Instrument
Fair value of senior notes due			591,000,000				599,000,000
Outstanding balances			$ 557,000,000				570,000,000
2.250% Senior Notes Due 2023 \| Senior Notes
Debt Instrument
Interest on notes due											2.25%
Senior notes issued \| €											€ 500,000,000
Five-Year Revolving Credit Facility
Debt Instrument
Maximum leverage ratio			3.50
4.375% Senior Notes Due 2046
Debt Instrument
Fair value of senior notes due			$ 431,000,000				397,000,000
Interest on notes due										4.375%
Senior notes issued										$ 400,000,000
Outstanding balances			400,000,000				400,000,000
Five Year Revolving Credit Facility 2015 [Member] \| Revolving Credit Facility
Debt Instrument
Increase in borrowing capacity												200,000,000
Maximum increase in borrowing capacity												$ 800,000,000
Five Year Revolving Credit Facility 2019 [Member] \| Revolving Credit Facility
Debt Instrument
Increase in borrowing capacity						$ 200,000,000
Maximum increase in borrowing capacity						1,000,000,000
Debt instrument aggregate principal amount						$ 800,000,000
US Dollar Commercial Paper Program [Member]
Debt Instrument
Senior notes issued			600,000,000
Euro Commercial Paper Program [Member]
Debt Instrument
Senior notes issued				$ 557,000,000	€ 500,000,000
Commercial paper				$ 276,000,000
Commercial Paper, Weighted-Average Interest Rate Receivable		0.22%
Level 2 \| 4.875% Senior Notes Due 2021
Debt Instrument
Fair value of senior notes due			$ 629,000,000				$ 620,000,000