Revenues (Tables)

12 Months Ended

Dec. 31, 2022

Revenues

Schedule of revenue disaggregation

	Year ended December 31, 2022						Year ended December 31, 2021						Year ended December 31, 2020
	Ultra-		Harsh				Ultra-		Harsh				Ultra-		Harsh
	deepwater		environment				deepwater		environment				deepwater		environment		Midwater
	floaters		floaters		Total		floaters		floaters		Total		floaters		floaters		floaters		Total
U.S.	$	1,135	$	—	$	1,135	$	1,096	$	2	$	1,098	$	1,302	$	—	$	—	$	1,302
Norway		—		835		835		—		790		790		—		876		—		876
Other countries (a)		573		32		605		624		44		668		792		170		12		974
Total contract drilling revenues	$	1,708	$	867	$	2,575	$	1,720	$	836	$	2,556	$	2,094	$	1,046	$	12	$	3,152

(a) The aggregate contract drilling revenues earned in other countries that individually represented less than 10 percent of total contract drilling revenues.

Schedule of contract balances and changes

	December 31,
	2022		2021
Deferred contract revenues, recorded in other current liabilities	$	124	$	83
Deferred contract revenues, recorded in other long-term liabilities		204		265
Total contract liabilities	$	328	$	348

Significant changes in contract liabilities were as follows (in millions):

	Years ended
	December 31,
	2022		2021
Total contract liabilities, beginning of period	$	348	$	456
Decrease due to recognition of revenues for goods and services		(119)		(149)
Increase due to goods and services transferred over time		99		41
Total contract liabilities, end of period	$	328	$	348