PENDING ACQUISITION OF AEROJET ROCKETDYNE	9 Months Ended
	Sep. 26, 2021
Business Combination and Asset Acquisition [Abstract]
PENDING ACQUISITION OF AEROJET ROCKETDYNE	PENDING ACQUISITION OF AEROJET ROCKETDYNEOn December 20, 2020, we entered into an agreement to acquire Aerojet Rocketdyne Holdings, Inc. (“Aerojet Rocketdyne”) for $51.00 per share, which is net of a $5.00 per share special cash dividend Aerojet Rocketdyne paid to its stockholders on March 24, 2021. At the time of announcement, this represented a post-dividend equity value of approximately $4.6 billion, on a fully diluted as-converted basis, and a transaction value of approximately $4.4 billion after the assumption of Aerojet Rocketdyne’s then-projected net cash. We expect to finance the acquisition primarily through new debt issuances. The transaction was approved by Aerojet Rocketdyne’s stockholders on March 9, 2021, which was a closing condition. As part of the regulatory review process of the transaction, on September 24, 2021, we and Aerojet Rocketdyne each certified substantial compliance with the Federal Trade Commission’s (FTC) requests for additional information, known as a “second request”, and the parties continue to engage with the FTC. Subject to satisfactory completion of the regulatory review process and satisfaction of the other closing conditions specified in the acquisition agreement, we anticipate closing the transaction in the first quarter of 2022. As previously disclosed, under the acquisition agreement, the “outside” date that gives rise to certain termination rights will automatically be extended from December 21, 2021 to March 21, 2022 in circumstances where all conditions have been satisfied but for the receipt of regulatory approvals. Our financial results will not include Aerojet Rocketdyne’s results until the acquisition is closed.