Share-Based Payments - SMP (Details) - SMP - EUR (€) shares in Thousands		12 Months Ended
Jun. 05, 2015	Dec. 31, 2017
SHARE-BASED PAYMENTS
Employee purchase discount		40.00%
Holding period		3 years
Ratio of matching share after holding period		0.333%
Fair value of granted awards	€ 62.98
Share price	€ 66.31
Risk-free interest rate	0.08%
Expected dividend yield	1.67%
Weighted average remaining life of awards outstanding at year end (in years)		1 year 6 months
Number of shares purchased	1,492
Senior Leadership Team and Global Executives
SHARE-BASED PAYMENTS
Holding period		3 years
Ratio of matching share after holding period		0.67%

The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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The percentage of an expected dividend used to calculate the fair value of share options granted.

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The weighted average fair value at the measurement date of granted equity instruments other than share options. [Refer: Weighted average [member]]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The weighted average share price. [Refer: Weighted average [member]]

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The holding period of awards in a share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of shares purchased in a share-payment arrangement.

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The percentage of employee discount in purchasing the entity's shares in a share-based payment arrangement.

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Ratio of free matching entity share to shares acquired by plan participants in a share-based payment arrangement.

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The weighted average remaining contractual life of outstanding other equity instruments in a share-based payment arrangements, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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