Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash provided by operating activities:
Net income	$ 130	$ 86
Non-cash charges to net income:
Depreciation and amortization	47	47
Charge for fair value mark-up of acquired inventory		3
Other	24	18
Changes in working capital:
Accounts receivable and prepaid expenses	(21)	(28)
Inventories	(32)	(14)
Accounts payable and accrued liabilities	(55)	(40)
Decrease (increase) in margin accounts	12	(8)
Other	(9)	5
Cash provided by operating activities	96	69
Cash used for investing activities:
Payments for acquisitions, net of cash acquired of $16		(332)
Capital expenditures, net of proceeds on disposals	(59)	(58)
Short-term investments	(13)	(3)
Other	(1)
Cash used for investing activities	(73)	(393)
Cash used for financing activities:
Proceeds from borrowings	84	435
Payments on debt	(44)	(38)
Issuance (repurchase) of common stock, net	1	(21)
Dividends paid (including to non-controlling interests)	(35)	(32)
Excess tax benefit on share-based compensation	3	2
Cash provided by financing activities	9	346
Effect of foreign exchange rate changes on cash	11	(29)
Increase (decrease) in cash and cash equivalents	43	(7)
Cash and cash equivalents, beginning of period	434	580
Cash and cash equivalents, end of period	$ 477	$ 573