Derivative Financial Instruments (Details) - Sep. 30, 2020 £ in Millions, $ in Millions	USD ($)	GBP (£)
Foreign Exchange Contract [Member]
Derivative [Line Items]
Foreign Currency Contracts, Liability, Fair Value Disclosure	$ 48.0	£ 4.0

Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

No definition available.

Name:	us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant