Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Cash Flows [Abstract]
Other cash payments to contract manufacturers		$ 51.7	$ 13.1	$ 11.7
Net proceeds received from initial public offering of FMC Lithium	[1]	0.0	364.0	0.0
Cash paid for interest, net of capitalized interest		140.9	133.4	98.8
Income taxes paid, net of refunds		130.9	135.3	33.3
Net interest payments			0.0	16.6
Tax payments, net of refunds			10.0	11.0
Noncash additions to property, plant and equipment		$ 18.2	$ 3.1	$ 6.1

[1] Pursuant to the terms of the separation and distribution agreement, we received a net distribution of approximately $364 million from the public offering of Livent representing the proceeds from the sale of its common stock and the underwriters' exercise to purchase additional shares as part of the initial public offering ("IPO"), net of underwriting discounts and commissions, financing fees and other offering related expenses.