POWER OF ATTORNEY

	Know all persons by these presents, that Kevin M. Graney, whose signature
appears below, constitutes and appoints Gregory S. Gallopoulos, John Ohrnberger
and L. Neal Wheeler and each of them, as his true and lawful attorney-in-fact
and agent, with full and several power of substitution and with authority to act
alone, for him and in his name, place and stead, in any and all capacities, to:

(1)	prepare, execute in the undersigned's name and on the undersigned's behalf,
and submit to the United States Securities and Exchange Commission ("SEC") a
Form ID, including any amendments thereto, and any other documents necessary or
appropriate to obtain and maintain codes and passwords enabling the undersigned
to make electronic filings with the SEC of reports required by Section 16(a) of
the Securities Exchange Act of 1934 (the "Exchange Act") or any rule or
regulation of the SEC;

(2)	execute for and on behalf of the undersigned Forms 3, 4, and 5 and any
amendments and supplements to those forms in accordance with Section 16(a) of
the Exchange Act and the rules thereunder;

(3)	do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete the execution of any such Form 3, 4 or
5 and any amendments and supplements to those forms and file such form with the
SEC and any other authority; and

(4)	take any other action of any type whatsoever in connection with the
foregoing that, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact may approve in
his/her discretion,

granting unto said attorney-in-fact and agent full power and authority to do and
perform each and every act and thing requisite and necessary to be done in and
about the premises, as fully to all intents and purposes as they or he/she might
or could do in person, hereby ratifying and confirming all that said
attorney-in-fact and agent or his/her or their substitute or substitutes may
lawfully do or cause to be done by virtue thereof.

	This Power of Attorney is continuing and shall remain in effect so long as the
undersigned is an officer or director of General Dynamics Corporation, a
Delaware corporation, unless the undersigned executes and delivers to the
Secretary of General Dynamics Corporation a written revocation of this Power of
Attorney.

	The undersigned acknowledges that each foregoing attorney-in-fact, in serving
in such capacity at the request of the undersigned, is not assuming any of the
undersigned's responsibilities to comply with Section 16 of the Exchange Act.

Date: September 26, 2019	                /s/ Kevin M. Graney