v2.4.0.6

Segment Information (Tables)

3 Months Ended

Mar. 31, 2011

Segment Information [Abstract]

Schedule Of Segment Reporting Information

Three Months Ended March 31, 2011

									Operating
									Segments		Reconciling		Consolidated
	Deepwater		Midwater		Jackup		Other		Total		Items		Total
Revenues	$    98.2		$    --		$  263.3		$    --		$   361.5		$     --		$   361.5
Operating expenses    Contract drilling (exclusive       of depreciation)	40.9		--		150.3		0.4		191.6		--		191.6
Depreciation	16.3		--		42.4		0.4		59.1		.4		59.5
General and administrative	--		--		--		--		--		30.1		30.1
Operating income (loss)	$     41.0		$    --		$     70.6		$(0.8)		$   110.8		$(30.5)		$     80.3
Property and equipment, net	$3,008.7		$    --		$2,232.8		$14.0		$5,255.5		$   3.6		$5,259.1

Three Months Ended March 31, 2010

									Operating
									Segments		Reconciling		Consolidated
	Deepwater		Midwater		Jackup		Other		Total		Items		Total
Revenues	$   130.4		$     --		$   318.2		$    --		$   448.6		$     --		$   448.6
Operating expenses    Contract drilling (exclusive       of depreciation)	45.0		--		137.0		0.4		182.4		--		182.4
Depreciation	9.8		--		40.9		0.7		51.4		.3		51.7
General and administrative	--		--		--		--		--		20.6		20.6
Operating income (loss)	$     75.6		$     --		$   140.3		$(1.1)		$   214.8		$(20.9)		$   193.9
Property and equipment, net	$2,341.5		$     --		$2,108.8		$28.1		$4,478.4		$   4.2		$4,482.6

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- Definition

This element may be used to capture the complete disclosure about the profit or loss and total assets for each reportable segment, as a single block of text. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 27, 28

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