Consolidated Statements of Changes in Equity - USD ($) shares in Millions, $ in Millions		Total	Common Stock [Member]	Treasury Stock	Additional Paid-in Capital [Member]	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss	Noncontrolling Interest
Beginning Balance at Dec. 31, 2012			$ 8.0	$ (780.0)	$ 8,525.0	$ (264.0)	$ (2,920.0)	$ 2,945.0
Beginning Balance (Shares) at Dec. 31, 2012			810.7	66.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 551.0	$ 0.0	$ 0.0	0.0	114.0	0.0	437.0
Total foreign currency translation adjustment, net of income tax		(334.0)	0.0	0.0	0.0	0.0	(227.0)	(107.0)
Total change in derivative fair value, net of income tax		247.0	0.0	0.0	0.0	0.0	174.0	73.0
Total pension adjustments, net of income tax		431.0	0.0	0.0	0.0	0.0	91.0	340.0
OTHER COMPREHENSIVE (LOSS) INCOME		344.0					38.0	306.0
Contributions from noncontrolling interests		0.0	0.0		0.0	0.0	0.0	109.0
Distributions to noncontrolling interests			0.0	0.0	0.0	0.0	0.0	(553.0)
Disposition of businesses		0.0	$ 0.0		0.0	0.0	0.0	(13.0)
Purchase of treasury stock		0.0		$ (322.0)	0.0	0.0	0.0
Issuance and exercise of stock-based compensation benefit plans (Shares)			2.6	(0.9)
Issuance and exercise of stock-based compensation benefit plans, net of income tax		0.0	$ 0.0	$ 13.0	33.0	0.0	0.0
Acquisition of treasury stock (shares)			0.0	25.3
Dividends declared on common stock		0.0	$ 0.0		(125.0)	0.0	0.0
Sale of subsidiary shares to noncontrolling interests		0.0	0.0		16.0		0.0	91.0
Acquisition of subsidiary shares from noncontrolling interests		0.0	0.0		(6.0)		0.0	(1.0)
Ending Balance at Dec. 31, 2013			$ 8.0	$ (1,089.0)	8,443.0	(150.0)	(2,882.0)	3,321.0
Ending Balance (Shares) at Dec. 31, 2013			813.3	90.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1,147.0	$ 0.0	$ 0.0	0.0	769.0	0.0	378.0
Total foreign currency translation adjustment, net of income tax		(494.0)	0.0	0.0	0.0	0.0	(332.0)	(162.0)
Total change in derivative fair value, net of income tax		(259.0)	0.0	0.0	0.0	0.0	(108.0)	(151.0)
Total pension adjustments, net of income tax		(20.0)	0.0	0.0	0.0	0.0	(4.0)	(16.0)
OTHER COMPREHENSIVE (LOSS) INCOME		(773.0)					(444.0)	(329.0)
Balance sheet reclassification related to an equity method investment	[1]		0.0	0.0	0.0	0.0	40.0	0.0
Contributions from noncontrolling interests			0.0	0.0	0.0	0.0	0.0	147.0
Distributions to noncontrolling interests			0.0	0.0	0.0	0.0	0.0	(466.0)
Disposition of businesses			0.0	0.0	0.0	0.0	0.0	(153.0)
Purchase of treasury stock			$ 0.0	$ (308.0)	0.0	0.0	0.0	0.0
Issuance and exercise of stock-based compensation benefit plans (Shares)			1.2	(2.0)
Issuance and exercise of stock-based compensation benefit plans, net of income tax			$ 0.0	$ 26.0	3.0	0.0	0.0	0.0
Acquisition of treasury stock (shares)				21.9
Dividends declared on common stock			0.0	$ 0.0	(73.0)	(107.0)	0.0	0.0
Sale of subsidiary shares to noncontrolling interests			0.0	0.0	29.0	0.0	0.0	173.0
Acquisition of subsidiary shares from noncontrolling interests		7.0	0.0	0.0	7.0	0.0	0.0	(18.0)
Ending Balance at Dec. 31, 2014		7,325.0	$ 8.0	$ (1,371.0)	8,409.0	512.0	(3,286.0)	3,053.0
Ending Balance (Shares) at Dec. 31, 2014			814.5	110.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		762.0	$ 0.0	$ 0.0	0.0	306.0	0.0	456.0
Total foreign currency translation adjustment, net of income tax		(1,019.0)	0.0	0.0	0.0	0.0	(674.0)	(345.0)
Total change in derivative fair value, net of income tax		9.0	0.0	0.0	0.0	0.0	43.0	(34.0)
Total pension adjustments, net of income tax		77.0	0.0	0.0	0.0	0.0	21.0	56.0
OTHER COMPREHENSIVE (LOSS) INCOME		(933.0)					(610.0)	(323.0)
Contributions from noncontrolling interests			0.0	0.0	0.0	0.0	0.0	126.0
Distributions to noncontrolling interests			0.0	0.0	(27.0)	0.0	0.0	(383.0)
Disposition of businesses			0.0	0.0	0.0	0.0	0.0	(41.0)
Noncontrolling Interest, Increase from Business Combination	[2]		0.0	0.0	0.0	0.0	0.0	15.0
Purchase of treasury stock		0.0	$ 0.0	$ (482.0)	0.0	0.0	0.0
Issuance and exercise of stock-based compensation benefit plans (Shares)			1.3	(1.4)
Issuance and exercise of stock-based compensation benefit plans, net of income tax		$ 0.0	$ 0.0	$ 16.0	13.0	0.0	0.0
Acquisition of treasury stock (shares)		39.7		39.7
Dividends declared on common stock		$ 0.0	0.0	$ 0.0	0.0	(280.0)	0.0
Sale of subsidiary shares to noncontrolling interests			0.0	0.0	323.0	(377.0)	0.0	119.0
Acquisition of subsidiary shares from noncontrolling interests		0.0
Ending Balance at Dec. 31, 2015		6,171.0	$ 8.0	$ (1,837.0)	8,718.0	143.0	(3,883.0)	$ 3,022.0
Ending Balance (Shares) at Dec. 31, 2015			815.8	149.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect of New Accounting Principle in Period of Adoption		$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ (18.0)	$ 13.0

[1] Reclassification resulting from SRP transaction during the third quarter of 2014. See Note 8—Investments In and Advances to Affiliates for further information.

[2] (2) Fair value of a tax equity partner's right to preferential returns recognized as a result of the acquisition of Solar Power PR, LLC, which was previously accounted for as an equity method investment.