Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Income taxes receivable	$ 8.7	$ 27.3
Cash and cash equivalents included in assets of DBT and Heat Transfer	$ 7.8	$ 4.3
Common stock shares, issued (in shares)	53,011,255	52,704,973
Common stock shares, outstanding (in shares)	45,467,768	45,032,325
Treasury stock shares (in shares)	7,543,487	7,672,648