Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Cash Flows from Operating Activities    
Net earnings including noncontrolling interest $ 294.6 $ 217.7
Depreciation, depletion and amortization 182.8 174.3
Deferred income taxes (31.5) (58.9)
Equity in net loss of nonconsolidated companies, net of dividends 1.4 3.3
Accretion expense for asset retirement obligations 7.8 10.5
Share-based compensation expense 4.6 34.9
Change in value of share repurchase agreement 0 60.0
Unrealized (gain) loss on derivatives 45.4 7.9
Other 4.1 4.0
Changes in assets and liabilities, excluding effects of acquisition:    
Receivables, net 8.0 (84.9)
Inventories 108.5 (27.3)
Other current and noncurrent assets (36.5) 151.4
Accounts payable 2.0 86.8
Accrued liabilities and income taxes 82.0 77.2
Other noncurrent liabilities (17.7) (29.9)
Net cash provided by operating activities 655.5 627.0
Cash Flows from Investing Activities    
Capital expenditures (229.5) (274.9)
Acquisition of business 0 (1,353.6)
Proceeds from adjustment to acquisition of business 47.9 0
Investments in nonconsolidated companies (3.0) (5.8)
Other 1.7 0
Net cash used in investing activities (182.9) (1,634.3)
Cash Flows from Financing Activities    
Payments of short-term debt (32.7) (58.4)
Proceeds from issuance of short-term debt 29.4 65.9
Payments of long-term debt (0.6) (0.3)
Proceeds from issuance of long-term debt 0 0.2
Proceeds from stock option exercises 2.9 0.2
Repurchases of stock (134.4) (1,677.9)
Cash dividends paid (91.4) (99.7)
Other (0.2) (0.3)
Net cash used in financing activities (227.0) (1,770.3)
Effect of exchange rate changes on cash (102.8) (24.8)
Net change in cash and cash equivalents 142.8 (2,802.4)
Cash and cash equivalents - beginning of period 2,374.6 5,293.1
Cash and cash equivalents - end of period 2,517.4 2,490.7
Supplemental Disclosure of Cash Flow Information:    
Interest (net of amount capitalized) 4.4 0
Income taxes (net of refunds) $ 46.4 $ 24.3