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Derivative Instruments and Hedging Activities (Forward Foreign Exchange Contracts) (Details) - Forward exchange contracts £ in Millions, $ in Millions, $ in Millions, $ in Millions	Dec. 31, 2019 USD ($)	Dec. 31, 2019 AUD ($)	Dec. 31, 2019 CAD ($)	Dec. 31, 2019 GBP (£)
British Pounds Sterling
Derivative [Line Items]
Foreign Currency Amount | £				£ 11.7
US Dollar Amount	$ 16.0
Weighted average exchange rate per $1 USD	0.73	0.73	0.73	0.73
Canada, Dollars
Derivative [Line Items]
Foreign Currency Amount			$ 9.5
US Dollar Amount	$ 7.7
Weighted average exchange rate per $1 USD	1.24	1.24	1.24	1.24
Australia, Dollars
Derivative [Line Items]
Foreign Currency Amount		$ 3.5
US Dollar Amount	$ 2.8
Weighted average exchange rate per $1 USD	1.25	1.25	1.25	1.25

X

- Definition

The amount of foreign currency that the entity has contractually agreed, or for which it has the option, to buy or sell, with respect to the foreign exchange forward contract described.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Average contractual rate at which a foreign currency can be purchased or sold.

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

No definition available.

+ Details

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X

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

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- Details

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- Details

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- Details

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