Financial instruments and fair value disclosures - Financial instruments recorded at carrying value (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
Apr. 29, 2022	Mar. 31, 2022	Dec. 31, 2021
Financial instruments and fair value disclosures
Fair value assets level 1 to level 2 transfers		$ 0.0	$ 0.0
Fair value assets level 2 to level 1 transfers		0.0	0.0
Fair value assets transfers into level 3		0.0	0.0
Fair value assets transfers out of level 3		0.0	0.0
Fair value liabilities level 1 to level 2 transfers		0.0	0.0
Fair value liabilities level 2 to level 1 transfers		0.0	0.0
Fair value liabilities transfers into level 3		0.0	0.0
Fair value liabilities transfers out of level 3		0.0	0.0
Carrying value
Financial instruments and fair value disclosures
Orbital receivable		407.0	417.0
Long-term debt excluding finance leases, deferred financing and other		2,058.0	$ 2,055.0
Interest rate swaps \| Cash flow hedges \| Syndicated Credit Facility
Financial instruments and fair value disclosures
Long-term debt at variable rate		$ 1,000.0
Derivative, Average Fixed Interest Rate		1.43%
Interest rate swaps \| Cash flow hedges \| Syndicated Credit Facility \| Forecast
Financial instruments and fair value disclosures
Maturities of interest rate swaps	$ 500.0

Amount of maturities of interest rate swaps.

No definition available.

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- Definition

Fair value portion of orbital receivable.

+ References

No definition available.

+ Details

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- Definition

Average fixed interest rate related to the group of interest rate derivatives.

+ References

No definition available.

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- Definition

Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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- Definition

Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

+ References

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount of transfers of liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

+ References

+ Details

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- Definition

Amount of transfers of liabilities measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

+ References

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- Definition

Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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- Definition

Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy.

+ References

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- Definition

Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

+ References

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- Definition

Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

+ References

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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- Definition

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

No definition available.

+ Details

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