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Percentage of owner interest purchased.

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Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

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Reflects the amount of new advances made to related parties in the form of loan and lease receivables.

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Amount of equity (deficit) attributable to noncontrolling interest. Excludes temporary equity.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Acquisitions - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Business combination shares issued			5.0
Business combination shares issued, value			$ 1,254.0
Common stock value	$ 11,624.0		11,624.0	$ 11,837.0
Ownership interest in net assets, value	$ 1,170.0		1,170.0	304.0
Revenue			$ 33,135.0	28,091.0	$ 22,929.0
Aker and Subsea7
Business Acquisition [Line Items]
Percentage of ownership interest, non-controlling	30.00%		30.00%
Aker \| Subsea Business
Business Acquisition [Line Items]
Revenue		$ 1,400.0		$ 1,500.0
Subsea7
Business Acquisition [Line Items]
Percentage of ownership interest purchased			10.00%
Payment to purchase ownership interest			$ 306.5
OneSubsea
Business Acquisition [Line Items]
Net assets of joint venture	$ 2,800.0		2,800.0
Ownership interest in net assets, value	$ 800.0		800.0
Increase in common stock value			$ 100.0
OneSubsea \| Aker
Business Acquisition [Line Items]
Business combination shares issued			5.1
Business combination shares issued, value			$ 306.5
Percentage of ownership interest, non-controlling	20.00%		20.00%
Promissory note issued			$ 87.5
Fair value of assets acquired and liabilities assumed	$ 1,300.0		$ 1,300.0
Revenue	$ 500.0
OneSubsea \| Subsea7
Business Acquisition [Line Items]
Percentage of ownership interest, non-controlling	10.00%		10.00%
OneSubsea \| SLB
Business Acquisition [Line Items]
Percentage of ownership interest	70.00%		70.00%