Accounting for Derivative Instruments and Hedging Activities (Policies)	12 Months Ended
Dec. 31, 2019
Accounting for Derivative Instruments and Hedging Activities [Abstract]
Derivative Instruments Policy	The Company uses derivative instruments to manage foreign exchange risk on the Sterling Notes, and does not hold or issue derivative instruments for speculative trading purposes.

Disclosure of accounting policy for its derivative instruments and hedging activities.

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