Statements Of Unaudited Condensed Consolidated Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
REVENUES FROM PRODUCT SALES AND SERVICES
TOTAL REVENUES	$ 555.6			$ 741.8			$ 1,455.8	$ 1,636.1
COST OF GOODS SOLD	(400.7)			(480.2)			(1,007.0)	(1,028.5)
SALES MARGIN	154.9			261.6			448.8	607.6
OTHER OPERATING EXPENSE
Selling, general and administrative expenses	(25.5)			(29.1)			(82.2)	(78.9)
Miscellaneous - net	(7.8)			(7.0)			(19.0)	(18.7)
Other operating expense	(33.3)			(36.1)			(101.2)	(97.6)
OPERATING INCOME	121.6			225.5			347.6	510.0
OTHER INCOME (EXPENSE)
Interest expense, net	(25.3)			(29.5)			(76.5)	(93.1)
Gain (loss) on extinguishment of debt				0.0			(18.2)	0.2
Other non-operating income	0.3			4.3			1.3	13.1
TOTAL OTHER INCOME (EXPENSE)	(25.0)			(25.2)			(93.4)	(79.8)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	96.6			200.3			254.2	430.2
INCOME TAX EXPENSE	(4.8)			(0.5)			(23.1)	(14.4)
INCOME FROM CONTINUING OPERATIONS	91.8			199.8			231.1	415.8
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAX	(0.9)			238.0			(1.5)	102.8
NET INCOME	$ 90.9	$ 160.8	$ (22.1)	$ 437.8	$ 165.1	$ (84.3)	$ 229.6	$ 518.6
EARNINGS (LOSS) PER COMMON SHARE – BASIC
Continuing operations (in dollars per share)	$ 0.34			$ 0.67			$ 0.83	$ 1.40
Discontinued operations (in dollars per share)	0			0.80			(0.01)	0.35
Earnings (Loss) per Common Share - Basic (in dollars per share)	0.34			1.47			0.82	1.75
EARNINGS (LOSS) PER COMMON SHARE – DILUTED
Continuing operations (in dollars per share)	0.33			0.64			0.80	1.37
Discontinued operations (in dollars per share)	0			0.77			0	0.34
Earnings (Loss) per Common Share - Diluted (in dollars per share)	$ 0.33			$ 1.41			$ 0.80	$ 1.71
AVERAGE NUMBER OF SHARES (IN THOUSANDS)
Basic	269,960			297,878			278,418	297,587
Diluted	276,578			310,203			287,755	303,518
Product [Member]
REVENUES FROM PRODUCT SALES AND SERVICES
TOTAL REVENUES	$ 515.0			$ 684.7			$ 1,357.8	$ 1,525.9
Freight [Member]
REVENUES FROM PRODUCT SALES AND SERVICES
TOTAL REVENUES	$ 40.6			$ 57.1			$ 98.0	$ 110.2