Pension Plans and Similar Obligations - Actuarial Assumptions (Details)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Foreign Post Employment Plans
Pension Plans and Similar Obligations
Discount rates	3.70%	4.20%	3.90%
Germany
Pension Plans and Similar Obligations
Discount rates	0.80%	2.30%	2.30%
Foreign
Pension Plans and Similar Obligations
Discount rates	0.30%	1.00%	0.80%

The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2019-01-01
-Paragraph 144
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_144&doctype=Standard
-URIDate 2019-03-27

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