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- Definition

Long-term Debt, Gross, Current Maturities

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Long-term Debt, Gross, Excluding Current Maturities

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Long-term Debt, Principal Outstanding [Abstract]

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

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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- Definition

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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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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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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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Debt - Summary of Outstanding Debt (Details)	9 Months Ended
Debt - Summary of Outstanding Debt (Details)	Sep. 30, 2018 USD ($)	Sep. 30, 2018 EUR (€)	Apr. 30, 2018 USD ($)	Apr. 30, 2018 EUR (€)	Jan. 31, 2018 USD ($)	Jan. 31, 2018 EUR (€)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)
Debt Instrument [Line Items]
Short-term debt	$ 53,000,000						$ 62,000,000
Principal outstanding
Total long-term debt	9,114,000,000						5,328,000,000
Less: current maturities	(89,000,000)						(64,000,000)
Total long-term debt, less current maturities	9,025,000,000						5,264,000,000
Carrying amount
Total long-term debt	9,017,000,000						5,281,000,000
Less: current maturities	(89,000,000)						(64,000,000)
Total long-term debt, less current maturities	8,928,000,000						5,217,000,000
Capital lease obligations	30,000,000						29,000,000
Senior Secured Borrowings \| U.S. dollar at LIBOR 1.75% due 2022
Principal outstanding
Total long-term debt	821,000,000						741,000,000
Carrying amount
Total long-term debt	816,000,000						735,000,000
Senior Secured Borrowings \| U.S. dollar at LIBOR 2.00% due 2027
Principal outstanding
Total long-term debt	1,147,000,000						0
Carrying amount
Total long-term debt	1,124,000,000						0
Debt Instrument, Face Amount			$ 1,150,000,000
Senior Secured Borrowings \| Euro at EURIBOR 1.75% due 20221
Principal outstanding
Total long-term debt	307,000,000						324,000,000
Carrying amount
Total long-term debt	307,000,000						324,000,000
Debt Instrument, Face Amount \| €		€ 265,000,000						€ 270,000,000
Senior Secured Borrowings \| Euro at EURIBOR 2.375% due 20252
Principal outstanding
Total long-term debt	868,000,000						0
Carrying amount
Total long-term debt	859,000,000						0
Debt Instrument, Face Amount	870,000,000	€ 748,000,000		€ 750,000,000
Senior Notes and Debentures \| €650 at 4.0% due 2022
Principal outstanding
Total long-term debt	755,000,000						781,000,000
Carrying amount
Total long-term debt	$ 750,000,000						774,000,000
Debt instrument stated percentage	4.00%	4.00%
Debt Instrument, Face Amount \| €		€ 650,000,000
Senior Notes and Debentures \| U. S. dollar at 4.50% due 2023
Principal outstanding
Total long-term debt	$ 1,000,000,000						1,000,000,000
Carrying amount
Total long-term debt	$ 992,000,000						992,000,000
Debt instrument stated percentage	4.50%	4.50%
Senior Notes and Debentures \| €335 at 2.250% due 2023
Principal outstanding
Total long-term debt	$ 389,000,000
Carrying amount
Total long-term debt	$ 384,000,000
Debt instrument stated percentage	2.25%	2.25%			2.25%	2.25%
Debt Instrument, Face Amount	$ 389,000,000	€ 335,000,000				€ 335,000,000
Senior Notes and Debentures \| €600 at 2.625% due 2024
Principal outstanding
Total long-term debt	697,000,000						720,000,000
Carrying amount
Total long-term debt	$ 691,000,000						713,000,000
Debt instrument stated percentage	2.625%	2.625%
Debt Instrument, Face Amount \| €		€ 600,000,000
Senior Notes and Debentures \| €600 at 3.375% due 2025
Principal outstanding
Total long-term debt	$ 697,000,000						720,000,000
Carrying amount
Total long-term debt	$ 690,000,000						711,000,000
Debt instrument stated percentage	3.375%	3.375%
Debt Instrument, Face Amount \| €		€ 600,000,000
Senior Notes and Debentures \| U.S. dollar at 4.25% due 2026
Principal outstanding
Total long-term debt	$ 400,000,000						400,000,000
Carrying amount
Total long-term debt	$ 394,000,000						393,000,000
Debt instrument stated percentage	4.25%	4.25%
Senior Notes and Debentures \| U.S. dollar at 4.75% due 2026
Principal outstanding
Total long-term debt	$ 875,000,000
Carrying amount
Total long-term debt	$ 863,000,000
Debt instrument stated percentage	4.75%	4.75%			4.75%	4.75%
Debt Instrument, Face Amount					$ 875,000,000
Senior Notes and Debentures \| U.S. dollar at 7.375% due 2026
Principal outstanding
Total long-term debt	$ 350,000,000						350,000,000
Carrying amount
Total long-term debt	$ 347,000,000						347,000,000
Debt instrument stated percentage	7.375%	7.375%
Senior Notes and Debentures \| €500 at 2.875% due 2026
Principal outstanding
Total long-term debt	$ 580,000,000
Carrying amount
Total long-term debt	$ 572,000,000
Debt instrument stated percentage	2.875%	2.875%			2.875%	2.875%
Debt Instrument, Face Amount	$ 580,000,000	€ 500,000,000				€ 500,000,000
Senior Notes and Debentures \| U.S. dollar at 7.50% due 2096
Principal outstanding
Total long-term debt	40,000,000						40,000,000
Carrying amount
Total long-term debt	$ 40,000,000						40,000,000
Debt instrument stated percentage	7.50%	7.50%
Other Indebtedness, Fixed Rate
Principal outstanding
Total long-term debt	$ 74,000,000						101,000,000
Carrying amount
Total long-term debt	74,000,000						101,000,000
Revolving Credit Facility \| Line of Credit
Principal outstanding
Total long-term debt	84,000,000						122,000,000
Carrying amount
Total long-term debt	$ 84,000,000						$ 122,000,000
London Interbank Offered Rate (LIBOR) \| Senior Secured Borrowings \| U.S. dollar at LIBOR 1.75% due 2022
Carrying amount
Basis spread on variable rate (as a percent)	1.75%
London Interbank Offered Rate (LIBOR) \| Senior Secured Borrowings \| U.S. dollar at LIBOR 2.00% due 2027
Carrying amount
Basis spread on variable rate (as a percent)	2.00%
EURIBOR \| Senior Secured Borrowings \| Euro at EURIBOR 1.75% due 20221
Carrying amount
Basis spread on variable rate (as a percent)	1.75%
EURIBOR \| Senior Secured Borrowings \| Euro at EURIBOR 2.375% due 20252
Carrying amount
Basis spread on variable rate (as a percent)	2.375%