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Provision for post-employment benefits - Life Expectancies For Defined Benefit Pension Plans (Detail) - yr	Dec. 31, 2018	Dec. 31, 2017
Years life expectancy after age 65 - current pensioners (at age 65) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	22.2	22.4
Years life expectancy after age 65 - current pensioners (at age 65) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	23.9	24.0
Years life expectancy after age 65 - future pensioners (current age 45) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	24.0	23.8
Years life expectancy after age 65 - future pensioners (current age 45) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	25.7	25.7
North America [member] | Years life expectancy after age 65 - current pensioners (at age 65) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	22.1
North America [member] | Years life expectancy after age 65 - current pensioners (at age 65) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	23.6
North America [member] | Years life expectancy after age 65 - future pensioners (current age 45) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	23.7
North America [member] | Years life expectancy after age 65 - future pensioners (current age 45) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	25.2
United Kingdom [member] | Years life expectancy after age 65 - current pensioners (at age 65) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	23.2
United Kingdom [member] | Years life expectancy after age 65 - current pensioners (at age 65) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	24.3
United Kingdom [member] | Years life expectancy after age 65 - future pensioners (current age 45) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	24.8
United Kingdom [member] | Years life expectancy after age 65 - future pensioners (current age 45) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	26.1
Western Continental Europe [member] | Years life expectancy after age 65 - current pensioners (at age 65) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	21.1
Western Continental Europe [member] | Years life expectancy after age 65 - current pensioners (at age 65) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	24.0
Western Continental Europe [member] | Years life expectancy after age 65 - future pensioners (current age 45) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	23.5
Western Continental Europe [member] | Years life expectancy after age 65 - future pensioners (current age 45) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	26.2
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Years life expectancy after age 65 - current pensioners (at age 65) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	17.0
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Years life expectancy after age 65 - current pensioners (at age 65) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	21.4
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Years life expectancy after age 65 - future pensioners (current age 45) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	17.0
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Years life expectancy after age 65 - future pensioners (current age 45) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	21.4

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 144
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_144&doctype=Standard
-URIDate 2018-03-16

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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.

+ References

No definition available.

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