Debt (Tables)

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Schedule of Debt Instruments

Debt at March 31, 2020 and December 31, 2019 was as follows (in millions): 

	March 31, 2020			December 31, 2019
Allegheny Technologies 5.875% Notes due 2023 (a)	$	500.0		$	500.0
Allegheny Technologies 5.875% Notes due 2027	350.0			350.0
Allegheny Technologies 4.75% Convertible Senior Notes due 2022	287.5			287.5
Allegheny Ludlum 6.95% Debentures due 2025	150.0			150.0
Term Loan due 2024	100.0			100.0
U.S. revolving credit facility	300.0			—
Foreign credit facilities	3.5			4.9
Finance leases and other	21.4			18.8
Debt issuance costs	(11.7		)	(12.3		)
Total debt	1,700.7			1,398.9
Short-term debt and current portion of long-term debt	310.7			11.5
Total long-term debt	$	1,390.0		$	1,387.4

(a) Bearing interest at 7.875% effective February 15, 2016.