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

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debt - Narrative (Details)	1 Months Ended	6 Months Ended
Debt - Narrative (Details)	Apr. 30, 2018 EUR (€)	Jun. 30, 2018 EUR (€)	Jun. 30, 2018 USD ($)	Apr. 30, 2018 USD ($)	Jan. 31, 2018 EUR (€)	Jan. 31, 2018 USD ($)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 USD ($)
Senior Secured Borrowings \| Euro at EURIBOR 1.75% due 20221
Debt Instrument [Line Items]
Debt, face amount \| €		€ 266,000,000					€ 270,000,000
Senior Secured Borrowings \| U.S. dollar at LIBOR 1.75% due 2022 - Term A Loan
Debt Instrument [Line Items]
Debt, face amount				$ 100,000,000
Senior Secured Borrowings \| U.S. dollar at LIBOR 2.00% due 2027
Debt Instrument [Line Items]
Debt, face amount				$ 1,150,000,000
Senior Secured Borrowings \| Euro at EURIBOR 2.375% due 20252
Debt Instrument [Line Items]
Debt, face amount	€ 750,000,000	€ 750,000,000	$ 875,000,000
Senior Notes and Debentures \| U.S. dollar at 4.75% due 2026
Debt Instrument [Line Items]
Debt, face amount						$ 875,000,000
Debt instrument stated percentage		4.75%	4.75%		4.75%	4.75%
Senior Notes and Debentures \| €500 at 2.875% due 2026
Debt Instrument [Line Items]
Debt, face amount		€ 500,000,000	$ 583,000,000		€ 500,000,000
Debt instrument stated percentage		2.875%	2.875%		2.875%	2.875%
Senior Notes and Debentures \| €335 at 2.250% due 2023
Debt Instrument [Line Items]
Debt, face amount		€ 335,000,000	$ 391,000,000		€ 335,000,000
Debt instrument stated percentage		2.25%	2.25%		2.25%	2.25%
Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Long-term debt, fair value			$ 9,368,000,000					$ 5,562,000,000
London Interbank Offered Rate (LIBOR) \| Senior Secured Borrowings \| U.S. dollar at LIBOR 2.00% due 2027
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		2.00%
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 1,650,000,000
Minimum \| London Interbank Offered Rate (LIBOR) \| Term Loan [Member] \| Euro And Dollar Term B Loans
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	1.00%
Maximum \| London Interbank Offered Rate (LIBOR) \| Term Loan [Member] \| Euro And Dollar Term B Loans
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	2.375%