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Commitments and Contingencies (Narrative) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) Lawsuits
Commitments And Contingencies [Line Items]
Other material lawsuits pending | Lawsuits	0
Fuel Line Lenders [Member]
Commitments And Contingencies [Line Items]
PREPA working capital | $	$ 700

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Other material lawsuits pending

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PREPA working capital.

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