Consolidating Financial Information (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities:
Total Cash Flows from Operating Activities	$ 1,687	$ 340	$ 938
Cash Flows from Investing Activities:
Capital Expenditures	(983)	(923)	(1,168)
Asset Dispositions	62	18	25
Decrease in Cash Due to Deconsolidation of Venezuelan Subsidiary	(320)	0	0
Decrease (Increase) in Restricted Cash	(6)	5	14
Short Term Securities Acquired	(77)	(72)	(105)
Short Term Securities Redeemed	69	95	89
Capital Contributions Received and Loans Incurred	0	0	0
Capital Redemptions and Loans Paid	0	0	0
Other Transactions	(7)	26	9
Total Cash Flows from Investing Activities	(1,262)	(851)	(1,136)
Cash Flows from Financing Activities:
Short Term Debt and Overdrafts Incurred	103	46	31
Short Term Debt and Overdrafts Paid	(84)	(24)	(120)
Long Term Debt Incurred	2,819	1,842	1,913
Long Term Debt Paid	(3,315)	(1,555)	(681)
Common Stock Issued	53	39	26
Common Stock Repurchased	(180)	(234)	(4)
Common Stock Dividends Paid	(68)	(60)	(12)
Preferred Stock Dividends Paid	0	(15)	(29)
Capital Contributions Received and Loans Incurred	0	0	0
Capital Redemptions and Loans Paid	0	0	0
Intercompany Dividends Paid	0	0	0
Transactions with Minority Interests in Subsidiaries	(9)	(49)	(26)
Debt Related Costs and Other Transactions	(33)	(1)	(16)
Dissolution of Global Alliance	(271)	0	0
Total Cash Flows from Financing Activities	(985)	(11)	1,082
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(125)	(313)	(169)
Net Change in Cash and Cash Equivalents	(685)	(835)	715
Cash and Cash Equivalents at Beginning of the Year	2,161	2,996	2,281
Cash and Cash Equivalents at End of the Year	1,476	2,161	2,996
Parent Company
Cash Flows from Operating Activities:
Total Cash Flows from Operating Activities	979	(334)	17
Cash Flows from Investing Activities:
Capital Expenditures	(315)	(303)	(220)
Asset Dispositions	48	9	2
Decrease in Cash Due to Deconsolidation of Venezuelan Subsidiary	0
Decrease (Increase) in Restricted Cash	0	(1)	0
Short Term Securities Acquired	0	0	0
Short Term Securities Redeemed	0	0	0
Capital Contributions Received and Loans Incurred	(70)	(382)	(91)
Capital Redemptions and Loans Paid	122	459	214
Other Transactions	0	13	0
Total Cash Flows from Investing Activities	(215)	(205)	(95)
Cash Flows from Financing Activities:
Short Term Debt and Overdrafts Incurred	55	22	14
Short Term Debt and Overdrafts Paid	(15)	(14)	(90)
Long Term Debt Incurred	1,736	601	900
Long Term Debt Paid	(2,341)	(608)	(11)
Common Stock Issued	53	39	26
Common Stock Repurchased	(180)	(234)	(4)
Common Stock Dividends Paid	(68)	(60)	(12)
Preferred Stock Dividends Paid		(15)	(29)
Capital Contributions Received and Loans Incurred	90	457	170
Capital Redemptions and Loans Paid	(125)	(244)	(403)
Intercompany Dividends Paid	0	0	0
Transactions with Minority Interests in Subsidiaries	0	0	0
Debt Related Costs and Other Transactions	(18)	0	(16)
Dissolution of Global Alliance	(271)
Total Cash Flows from Financing Activities	(1,084)	(56)	545
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0	0	0
Net Change in Cash and Cash Equivalents	(320)	(595)	467
Cash and Cash Equivalents at Beginning of the Year	674	1,269	802
Cash and Cash Equivalents at End of the Year	354	674	1,269
Guarantor Subsidiaries
Cash Flows from Operating Activities:
Total Cash Flows from Operating Activities	149	195	16
Cash Flows from Investing Activities:
Capital Expenditures	(119)	(19)	(19)
Asset Dispositions	0	2	0
Decrease in Cash Due to Deconsolidation of Venezuelan Subsidiary	0
Decrease (Increase) in Restricted Cash	0	0	0
Short Term Securities Acquired	0	0	0
Short Term Securities Redeemed	0	0	0
Capital Contributions Received and Loans Incurred	0	0	(11)
Capital Redemptions and Loans Paid	0	0	0
Other Transactions	0	0	0
Total Cash Flows from Investing Activities	(119)	(17)	(30)
Cash Flows from Financing Activities:
Short Term Debt and Overdrafts Incurred	0	0	0
Short Term Debt and Overdrafts Paid	(16)	(22)	(14)
Long Term Debt Incurred	0	0	0
Long Term Debt Paid	0	0	0
Common Stock Issued	0	0	0
Common Stock Repurchased	0	0	0
Common Stock Dividends Paid	0	0	0
Preferred Stock Dividends Paid		0	0
Capital Contributions Received and Loans Incurred	12	47	58
Capital Redemptions and Loans Paid	(15)	0	0
Intercompany Dividends Paid	(17)	(203)	0
Transactions with Minority Interests in Subsidiaries	0	0	0
Debt Related Costs and Other Transactions	0	0	0
Dissolution of Global Alliance	0
Total Cash Flows from Financing Activities	(36)	(178)	44
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(13)	(5)	(4)
Net Change in Cash and Cash Equivalents	(19)	(5)	26
Cash and Cash Equivalents at Beginning of the Year	89	94	68
Cash and Cash Equivalents at End of the Year	70	89	94
Non-Guarantor Subsidiaries
Cash Flows from Operating Activities:
Total Cash Flows from Operating Activities	612	758	1,009
Cash Flows from Investing Activities:
Capital Expenditures	(558)	(607)	(940)
Asset Dispositions	14	7	23
Decrease in Cash Due to Deconsolidation of Venezuelan Subsidiary	(320)
Decrease (Increase) in Restricted Cash	(6)	6	14
Short Term Securities Acquired	(77)	(72)	(105)
Short Term Securities Redeemed	69	95	89
Capital Contributions Received and Loans Incurred	(90)	(457)	(170)
Capital Redemptions and Loans Paid	125	244	403
Other Transactions	(7)	13	9
Total Cash Flows from Investing Activities	(850)	(771)	(677)
Cash Flows from Financing Activities:
Short Term Debt and Overdrafts Incurred	118	60	121
Short Term Debt and Overdrafts Paid	(123)	(24)	(120)
Long Term Debt Incurred	1,083	1,241	1,013
Long Term Debt Paid	(974)	(947)	(670)
Common Stock Issued	0	0	0
Common Stock Repurchased	0	0	0
Common Stock Dividends Paid	0	0	0
Preferred Stock Dividends Paid		0	0
Capital Contributions Received and Loans Incurred	58	335	44
Capital Redemptions and Loans Paid	(107)	(459)	(214)
Intercompany Dividends Paid	(27)	(70)	(93)
Transactions with Minority Interests in Subsidiaries	(9)	(49)	(26)
Debt Related Costs and Other Transactions	(15)	(1)	0
Dissolution of Global Alliance	0
Total Cash Flows from Financing Activities	4	86	55
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(112)	(308)	(165)
Net Change in Cash and Cash Equivalents	(346)	(235)	222
Cash and Cash Equivalents at Beginning of the Year	1,398	1,633	1,411
Cash and Cash Equivalents at End of the Year	1,052	1,398	1,633
Consolidating Entries and Eliminations
Cash Flows from Operating Activities:
Total Cash Flows from Operating Activities	(53)	(279)	(104)
Cash Flows from Investing Activities:
Capital Expenditures	9	6	11
Asset Dispositions	0	0	0
Decrease in Cash Due to Deconsolidation of Venezuelan Subsidiary	0
Decrease (Increase) in Restricted Cash	0	0	0
Short Term Securities Acquired	0	0	0
Short Term Securities Redeemed	0	0	0
Capital Contributions Received and Loans Incurred	160	839	272
Capital Redemptions and Loans Paid	(247)	(703)	(617)
Other Transactions	0	0	0
Total Cash Flows from Investing Activities	(78)	142	(334)
Cash Flows from Financing Activities:
Short Term Debt and Overdrafts Incurred	(70)	(36)	(104)
Short Term Debt and Overdrafts Paid	70	36	104
Long Term Debt Incurred	0	0	0
Long Term Debt Paid	0	0	0
Common Stock Issued	0	0	0
Common Stock Repurchased	0	0	0
Common Stock Dividends Paid	0	0	0
Preferred Stock Dividends Paid		0	0
Capital Contributions Received and Loans Incurred	(160)	(839)	(272)
Capital Redemptions and Loans Paid	247	703	617
Intercompany Dividends Paid	44	273	93
Transactions with Minority Interests in Subsidiaries	0	0	0
Debt Related Costs and Other Transactions	0	0	0
Dissolution of Global Alliance	0
Total Cash Flows from Financing Activities	131	137	438
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0	0	0
Net Change in Cash and Cash Equivalents	0	0	0
Cash and Cash Equivalents at Beginning of the Year	0	0	0
Cash and Cash Equivalents at End of the Year	$ 0	$ 0	$ 0