Equity (Details) - USD ($)		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017	Jan. 01, 2018	Dec. 31, 2017
Changes In Equity Disclosure [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		$ 56,000,000
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest		(98,000,000)	$ (125,000,000)
Stockholders' Equity Attributable to Parent		3,193,000,000			$ 2,465,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		4,845,000,000	5,700,000,000
Net income		777,000,000	98,000,000
Net Income (Loss) Attributable to Noncontrolling Interest		93,000,000	121,000,000
Total foreign currency translation adjustment, net of income tax		9,000,000	71,000,000
Total change in derivative fair value, net of income tax		67,000,000	15,000,000
Total pension adjustments, net of income tax		2,000,000	6,000,000
Cumulative Effect of New Accounting Principle in Period of Adoption	[1]	167,000,000	31,000,000
Preferred Stock, Accretion of Redemption, Discount		(6,000,000)	0
Contributions from noncontrolling interests		1,000,000	17,000,000
Distributions to noncontrolling interests		(9,000,000)	(19,000,000)
Disposition of businesses		(249,000,000)	0
Issuance and exercise of stock-based compensation		1,000,000	1,000,000
Dividends declared on common stock		(86,000,000)	(79,000,000)
Sale of subsidiary shares to noncontrolling interests		1,000,000	18,000,000
Acquisition of subsidiary shares from noncontrolling interests		0	267,000,000
Temporary Equity, Net Income		5,000,000	3,000,000
Ending Balance		5,525,000,000	6,129,000,000
Additional Paid in Capital		8,397,000,000			8,501,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax		(1,808,000,000)		$ (1,857,000,000)	$ (1,876,000,000)
AOCI Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total foreign currency translation adjustment, net of income tax		3,000,000
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Changes In Equity Disclosure [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		37,000,000
Accumulated Translation Adjustment [Member]
Changes In Equity Disclosure [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		19,000,000
Accumulated Defined Benefit Plans Adjustment [Member]
Changes In Equity Disclosure [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total pension adjustments, net of income tax		2,000,000
Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		2,465,000,000	2,794,000,000
Net income		684,000,000	(24,000,000)
Total foreign currency translation adjustment, net of income tax		3,000,000	61,000,000
Total change in derivative fair value, net of income tax		44,000,000	12,000,000
Total pension adjustments, net of income tax		2,000,000	(1,000,000)
Cumulative Effect of New Accounting Principle in Period of Adoption	[1]	86,000,000	31,000,000
Preferred Stock, Accretion of Redemption, Discount		(6,000,000)	0
Contributions from noncontrolling interests		0	0
Distributions to noncontrolling interests		0	0
Disposition of businesses		0	0
Issuance and exercise of stock-based compensation		1,000,000	1,000,000
Dividends declared on common stock		(86,000,000)	(79,000,000)
Sale of subsidiary shares to noncontrolling interests		0	(4,000,000)
Acquisition of subsidiary shares from noncontrolling interests		0	200,000,000
Temporary Equity, Net Income		0	0
Ending Balance		3,193,000,000	2,991,000,000
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		2,380,000,000	2,906,000,000
Net income	[2]	93,000,000	122,000,000
Total foreign currency translation adjustment, net of income tax		6,000,000	10,000,000
Total change in derivative fair value, net of income tax		23,000,000	3,000,000
Total pension adjustments, net of income tax		0	7,000,000
Cumulative Effect of New Accounting Principle in Period of Adoption	[1]	81,000,000	0
Preferred Stock, Accretion of Redemption, Discount		0	0
Contributions from noncontrolling interests		1,000,000	17,000,000
Distributions to noncontrolling interests		(9,000,000)	(19,000,000)
Disposition of businesses		(249,000,000)	0
Issuance and exercise of stock-based compensation		0	0
Dividends declared on common stock		0	0
Sale of subsidiary shares to noncontrolling interests		1,000,000	22,000,000
Acquisition of subsidiary shares from noncontrolling interests		0	67,000,000
Temporary Equity, Net Income		5,000,000	3,000,000
Ending Balance		2,332,000,000	$ 3,138,000,000
Alto Maipo [Member]
Changes In Equity Disclosure [Line Items]
Stockholders' Equity Attributable to Parent		196,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Additional Paid in Capital		229,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ (33,000,000)

[1] (2) See Note 1—Financial Statement Presentation, New Accounting Standards Adopted for further information.

[2] (1) Net income attributable to noncontrolling interest of $98 million and net loss attributable to redeemable stocks of subsidiaries of $5 million for the three months ended March 31, 2018. Net income attributable to noncontrolling interest of $125 million and net loss attributable to redeemable stock of subsidiaries of $3 million for the three months ended March 31, 2017.