Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Purchase and retirement of common stock (in shares)		6,378,025		16,947,393
Dividends declared on common stock (in dollars per share)	$ 0	$ 0.10	$ 0.10	$ 0.10
Issuance of shares of common stock pursuant to employee stock plans (in shares)	454,621	1,062,052	1,046,122	552,752
Issuance of shares of AAG common stock pursuant to a public stock offering (in shares)	85,215,000