Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash provided by operating activities
Net income	$ 424	$ 454	$ 532
Non-cash charges to net income:
Depreciation and amortization	220	247	209
Mechanical stores expense	57	57	57
Deferred income taxes	3	(23)	67
Charge for fair value markup of acquired inventory			9
Other	33	39	39
Changes in working capital:
Accounts receivable and prepaid expenses	(61)	(70)	(44)
Inventories	(43)	(50)	(34)
Accounts payable and accrued liabilities	51	(3)	(49)
Margin accounts	(1)	5	6
Other	(3)	47	(23)
Cash provided by operating activities	680	703	769
Cash used for investing activities
Capital expenditures and mechanical stores purchases	(328)	(350)	(314)
Payments for acquisitions, net of cash acquired of $4, $ - , and $ - , respectively	(42)		(17)
Investment in non-consolidated affiliates	(10)	(15)
Short-term investments	3	1	(3)
Proceeds from disposal of plants and properties	2	1	8
Other	1	2
Cash used for investing activities	(374)	(361)	(326)
Cash used for financing activities
Proceeds from borrowings	1,209	987	1,144
Payments on debt	(1,465)	(738)	(1,240)
Repurchases of common stock, net	63	(657)	(123)
Issuances of common stock for share-based compensation, net of settlements	3	1	9
Dividends paid, including to non-controlling interests	(174)	(182)	(165)
Cash used for financing activities	(364)	(589)	(375)
Effects of foreign exchange rate changes on cash	(5)	(21)	15
(Decrease) increase in cash and cash equivalents	(63)	(268)	83
Cash and cash equivalents, beginning of period	327	595
Cash and cash equivalents, end of period	$ 264	$ 327	$ 595