Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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

Segment Information (Schedule Of Long-Lived Assets By Geographical Segment) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Apr. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Property and equipment, net	$ 890.9	$ 909.1	$ 10,960.5	$ 15,096.9
Geographic Areas [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	911.4		10,996.3	15,155.0
Geographic Areas [Member] \| United States [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	152.1		1,811.9	2,972.4
Geographic Areas [Member] \| SAUDI ARABIA
Segment Reporting Information [Line Items]
Property and equipment, net	75.2		1,183.7	1,259.3
Geographic Areas [Member] \| United Kingdom [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	142.4		2,584.0	1,210.5
Geographic Areas [Member] \| SPAIN
Segment Reporting Information [Line Items]
Property and equipment, net	145.8		2,122.6	3,012.4
Geographic Areas [Member] \| Other countries [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	$ 395.9		$ 3,294.1	$ 6,700.4