Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4587-114921

Name:	us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Pension and Other Post-Retirement Benefit Plans (Contributions) (Details) - Pensions - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Feb. 16, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employer contributions	$ 28.7	$ 6.9
International
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected employer contributions	$ 20.7
International \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected employer contributions			$ 18.9