Consolidating Financial Information (Details 2) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)
Cash Flows from Operating Activities:
Total Cash Flows from Operating Activities	$ 635	$ (939)
Cash Flows from Investing Activities:
Capital Expenditures	(656)	(634)
Asset Dispositions	13	6
Decrease (Increase) in Restricted Cash	(11)	6
Short Term Securities Acquired	(50)	(72)
Short Term Securities Redeemed	25	82
Capital Contributions and Loans Incurred	0	0
Capital Redemptions and Loans Paid	0	0
Other Transactions	5	7
Total Cash Flows from Investing Activities	(674)	(605)
Cash Flows from Financing Activities:
Short Term Debt and Overdrafts Incurred	72	52
Short Term Debt and Overdrafts Paid	(59)	(24)
Long Term Debt Incurred	1,265	1,739
Long Term Debt Paid	(1,469)	(1,054)
Common Stock Issued	33	41
Common Stock Repurchased	(82)	(97)
Common Stock Dividends Paid	(49)	(43)
Preferred Stock Dividends Paid	0	(15)
Capital Contributions and Loans Incurred	0	0
Capital Redemptions and Loans Paid	0	0
Intercompany Dividends Paid	0	0
Transactions with Minority Interests in Subsidiaries	(5)	(36)
Debt Related Costs and Other Transactions	(12)	0
Total Cash Flows from Financing Activities	(306)	563
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(102)	(271)
Net Change in Cash and Cash Equivalents	(447)	(1,252)
Cash and Cash Equivalents at Beginning of the Period	2,161	2,996
Less: Cash Held for Sale	(24)	0
Cash and Cash Equivalents at End of the Period	1,690	1,744
Parent Company
Cash Flows from Operating Activities:
Total Cash Flows from Operating Activities	326	(957)
Cash Flows from Investing Activities:
Capital Expenditures	(252)	(203)
Asset Dispositions	1	2
Decrease (Increase) in Restricted Cash	0	0
Short Term Securities Acquired	0	0
Short Term Securities Redeemed	0	0
Capital Contributions and Loans Incurred	(70)	(211)
Capital Redemptions and Loans Paid	12	459
Other Transactions	0	1
Total Cash Flows from Investing Activities	(309)	48
Cash Flows from Financing Activities:
Short Term Debt and Overdrafts Incurred	47	23
Short Term Debt and Overdrafts Paid	0	0
Long Term Debt Incurred	455	501
Long Term Debt Paid	(659)	(507)
Common Stock Issued	33	41
Common Stock Repurchased	(82)	(97)
Common Stock Dividends Paid	(49)	(43)
Preferred Stock Dividends Paid		(15)
Capital Contributions and Loans Incurred	90	452
Capital Redemptions and Loans Paid	(40)	(244)
Intercompany Dividends Paid	0	0
Transactions with Minority Interests in Subsidiaries	0	0
Debt Related Costs and Other Transactions	(3)
Total Cash Flows from Financing Activities	(208)	111
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0	0
Net Change in Cash and Cash Equivalents	(191)	(798)
Cash and Cash Equivalents at Beginning of the Period	674	1,269
Less: Cash Held for Sale	0
Cash and Cash Equivalents at End of the Period	483	471
Guarantor Subsidiaries
Cash Flows from Operating Activities:
Total Cash Flows from Operating Activities	1	(11)
Cash Flows from Investing Activities:
Capital Expenditures	(27)	(14)
Asset Dispositions	0	1
Decrease (Increase) in Restricted Cash	0	0
Short Term Securities Acquired	0	0
Short Term Securities Redeemed	0	0
Capital Contributions and Loans Incurred	0	0
Capital Redemptions and Loans Paid	0	0
Other Transactions	0	0
Total Cash Flows from Investing Activities	(27)	(13)
Cash Flows from Financing Activities:
Short Term Debt and Overdrafts Incurred	0	0
Short Term Debt and Overdrafts Paid	(8)	(6)
Long Term Debt Incurred	0	0
Long Term Debt Paid	0	0
Common Stock Issued	0	0
Common Stock Repurchased	0	0
Common Stock Dividends Paid	0	0
Preferred Stock Dividends Paid		0
Capital Contributions and Loans Incurred	12	0
Capital Redemptions and Loans Paid	(12)	0
Intercompany Dividends Paid	0	0
Transactions with Minority Interests in Subsidiaries	0	0
Debt Related Costs and Other Transactions	0
Total Cash Flows from Financing Activities	(8)	(6)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(10)	(3)
Net Change in Cash and Cash Equivalents	(44)	(33)
Cash and Cash Equivalents at Beginning of the Period	89	94
Less: Cash Held for Sale	0
Cash and Cash Equivalents at End of the Period	45	61
Non-Guarantor Subsidiaries
Cash Flows from Operating Activities:
Total Cash Flows from Operating Activities	332	71
Cash Flows from Investing Activities:
Capital Expenditures	(382)	(420)
Asset Dispositions	12	3
Decrease (Increase) in Restricted Cash	(11)	6
Short Term Securities Acquired	(50)	(72)
Short Term Securities Redeemed	25	82
Capital Contributions and Loans Incurred	(90)	(452)
Capital Redemptions and Loans Paid	40	244
Other Transactions	5	6
Total Cash Flows from Investing Activities	(451)	(603)
Cash Flows from Financing Activities:
Short Term Debt and Overdrafts Incurred	72	52
Short Term Debt and Overdrafts Paid	(98)	(41)
Long Term Debt Incurred	810	1,238
Long Term Debt Paid	(810)	(547)
Common Stock Issued	0	0
Common Stock Repurchased	0	0
Common Stock Dividends Paid	0	0
Preferred Stock Dividends Paid		0
Capital Contributions and Loans Incurred	58	211
Capital Redemptions and Loans Paid	0	(459)
Intercompany Dividends Paid	(19)	(39)
Transactions with Minority Interests in Subsidiaries	(5)	(36)
Debt Related Costs and Other Transactions	(9)
Total Cash Flows from Financing Activities	(1)	379
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(92)	(268)
Net Change in Cash and Cash Equivalents	(212)	(421)
Cash and Cash Equivalents at Beginning of the Period	1,398	1,633
Less: Cash Held for Sale	(24)
Cash and Cash Equivalents at End of the Period	1,162	1,212
Consolidating Entries and Eliminations
Cash Flows from Operating Activities:
Total Cash Flows from Operating Activities	(24)	(42)
Cash Flows from Investing Activities:
Capital Expenditures	5	3
Asset Dispositions	0	0
Decrease (Increase) in Restricted Cash	0	0
Short Term Securities Acquired	0	0
Short Term Securities Redeemed	0	0
Capital Contributions and Loans Incurred	160	663
Capital Redemptions and Loans Paid	(52)	(703)
Other Transactions	0	0
Total Cash Flows from Investing Activities	113	(37)
Cash Flows from Financing Activities:
Short Term Debt and Overdrafts Incurred	(47)	(23)
Short Term Debt and Overdrafts Paid	47	23
Long Term Debt Incurred	0	0
Long Term Debt Paid	0	0
Common Stock Issued	0	0
Common Stock Repurchased	0	0
Common Stock Dividends Paid	0	0
Preferred Stock Dividends Paid		0
Capital Contributions and Loans Incurred	(160)	(663)
Capital Redemptions and Loans Paid	52	703
Intercompany Dividends Paid	19	39
Transactions with Minority Interests in Subsidiaries	0	0
Debt Related Costs and Other Transactions	0
Total Cash Flows from Financing Activities	(89)	79
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0	0
Net Change in Cash and Cash Equivalents	0	0
Cash and Cash Equivalents at Beginning of the Period	0	0
Less: Cash Held for Sale	0
Cash and Cash Equivalents at End of the Period	$ 0	$ 0