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Earnings (Loss) per Share - Antidilutive Securities and Reconciliation of Weighted-Average Common Shares Outstanding (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive securities, stock options (in shares)	0.0	2.4	0.7
Stock options
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Assumed conversion of dilutive stock options and dilutive RSAs (in shares)	3.0
Restricted stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Assumed conversion of dilutive stock options and dilutive RSAs (in shares)	0.5
Convertible preferred stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Assumed conversion of convertible preferred shares (in shares)	0.7
Convertible debt securities
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Assumed conversion of convertible debt (in shares)	9.1