Defined benefit plan target and weighted average asset allocations for US pension plans.

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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Retirement Benefit Plans - Target Allocation (Details) - Pension Plan [Member]	Dec. 31, 2018	Dec. 31, 2017
Target assets allocation and actual asset allocations for US pension plan assets
Actual Asset Allocation	100.00%	100.00%
Equity securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Actual Asset Allocation	18.00%	14.00%
Debt Securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Actual Asset Allocation	76.00%	80.00%
Other Investments [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Actual Asset Allocation	6.00%	6.00%
Minimum [Member] \| Equity securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	15.00%
Minimum [Member] \| Debt Securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	70.00%
Minimum [Member] \| Other Investments [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	4.00%
Maximum [Member] \| Equity securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	21.00%
Maximum [Member] \| Debt Securities [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	80.00%
Maximum [Member] \| Other Investments [Member]
Target assets allocation and actual asset allocations for US pension plan assets
Current Target Allocation	10.00%