Stock Based Compensation and Other Incentive Compensation - Performance Units (Details) - Performance Units [Member] - Free Cash Flow (FCF) Awards [Member] - USD ($) shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive compensation arrangement, by award, grants in period	13.6	14.2
Incentive compensation arrangement, cost not yet recognized, amount	$ 13.7
Incentive compensation arrangement, cost not yet recognized, period for recognition	2 years

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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