CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
OPERATING ACTIVITIES
Net income	$ 1,548.2	$ 732.4	$ 778.8
Adjustments to reconcile net earnings to net cash provided from operating activities:
Depreciation, amortization and depletion	674.3	671.1	647.1
Equity earnings of affiliate, net of dividends received	(3.9)	(12.3)	(11.3)
Loss (gain) on foreign currency transaction effect	17.3	24.9	(8.9)
Provision (benefit) for deferred income taxes	(51.5)	641.5	(117.0)
Other, net	27.0	8.9	28.2
Change in operating assets and liabilities:
(Increase) decrease in accounts receivable	68.3	(298.7)	(143.3)
(Increase) decrease in inventories	(190.8)	(201.9)	(207.9)
Increase (decrease) in accounts payable and accrued liabilities	117.8	139.5	30.5
(Increase) decrease in other operating assets and liabilities	28.4	271.2	(73.1)
Net cash provided by operating activities	2,235.1	1,976.6	923.1
INVESTING ACTIVITIES
Capital expenditures	(1,121.4)	(1,023.5)	(1,118.5)
Purchase of short-term investments	(310.6)	(61.3)	(129.8)
Proceeds on sale of short-term investment	147.3	62.3	681.9
Loan repaid by related parties			111.2
Other, net	(11.5)	3.5	3.2
Net cash used in investing activities	(1,296.2)	(1,019.0)	(452.0)
FINANCING ACTIVITIES
Repurchase of common shares			(71.7)
Cash dividends paid to common stockholders	(1,082.3)	(456.1)	(139.3)
Distributions to non-controlling interest	(1.5)	(0.3)
Other, net	0.4	0.3	0.3
Net cash used in financing activities	(1,083.4)	(456.1)	(210.7)
Effect of exchange rate changes on cash and cash equivalents	(15.7)	(42.7)	11.1
Increase (decrease) in cash and cash equivalents	(160.2)	458.8	271.5
Cash and cash equivalents, at beginning of year	1,004.8	546.0	274.5
Cash and cash equivalents, at end of year	844.6	1,004.8	546.0
Cash paid during the year for:
Interest	356.7	356.7	356.7
Income taxes	1,155.3	889.8	571.8
Workers' participation	194.0	136.0	121.6
Supplemental schedule of non-cash operating, investing and financing activities:
Decrease (increase) in pension and other post-retirement benefits	(2.9)	2.9	(3.5)
Capital expenditures incurred but not yet paid	$ 37.7	$ 137.7	$ 99.4