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Segment Information (Schedule Of Long-Lived Assets By Geographical Segment) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Property and equipment, net	$ 10,960.5	$ 15,096.9	$ 12,616.2
Geographic Areas [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	10,996.3	15,155.0	12,616.2
Geographic Areas [Member] | United States [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	1,811.9	2,972.4	2,270.0
Geographic Areas [Member] | SAUDI ARABIA
Segment Reporting Information [Line Items]
Property and equipment, net	1,183.7	1,259.3	668.6
Geographic Areas [Member] | United Kingdom [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	2,584.0	1,210.5	1,185.2
Geographic Areas [Member] | SPAIN
Segment Reporting Information [Line Items]
Property and equipment, net	2,122.6	3,012.4	2,306.6
Geographic Areas [Member] | NIGERIA
Segment Reporting Information [Line Items]
Property and equipment, net	766.2	788.4	1,368.2
Geographic Areas [Member] | Other countries [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	$ 2,527.9	$ 5,912.0	$ 4,817.6

X

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(14))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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