Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash provided by operating activities:
Net income	$ 179.8	$ 208.7
Non-cash charges to net income:
Depreciation and amortization	98	98
Changes in working capital:
Accounts receivable and prepaid items	(36)	(89)
Inventories	(55)	(48)
Accounts payable and accrued liabilities	(12)	(139)
Decrease in margin accounts	17	14
Other	37	67
Cash provided by operating activities	229	112
Cash used for investing activities:
Capital expenditures, net of proceeds on disposals	(116)	(132)
Short-term investments		19
Other		2
Cash used for investing activities	(116)	(111)
Cash used for financing activities:
Proceeds from borrowings	20	22
Payments on debt	(61)	(3)
Issuance of common stock, net	9	10
Dividends paid (including to non-controlling interests)	(65)	(52)
Excess tax benefit on share-based compensation	3
Cash used for financing activities	(94)	(23)
Effect of foreign exchange rate changes on cash	(1)	(18)
Increase (decrease) in cash and cash equivalents	18	(40)
Cash and cash equivalents, beginning of period	574	609
Cash and cash equivalents, end of period	$ 592	$ 569