Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Value of property contributed in noncash investing and financing activities.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount after income tax of income (loss) including the portion attributable to nonredeemable noncontrolling interest. Excludes the portion attributable to redeemable noncontrolling interest recognized as temporary equity.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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Investments In and Advances To Affiliates (Details) - USD ($) $ in Millions				3 Months Ended
	Jan. 01, 2018	Nov. 15, 2017	Jul. 25, 2017	Mar. 31, 2018	Mar. 31, 2017
Investments in and Advances to Affiliates [Line Items]
Revenue				$ 2,740
Operating margin				656	$ 557
Net income				777	98
Income (Loss) from Equity Method Investments				11	7
Minority Owned Affiliates [Member]
Investments in and Advances to Affiliates [Line Items]
Revenue				206	167
Operating margin				28	32
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest				12	11
Parent [Member]
Investments in and Advances to Affiliates [Line Items]
Net income				684	(24)
sPower [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage		2.00%	48.00%
Payments to Acquire Businesses, Net of Cash Acquired		$ 19	$ 461
Fluence [Member]
Investments in and Advances to Affiliates [Line Items]
Payments to Acquire Interest in Joint Venture	$ 7
Business Acquisition, Percentage of Voting Interests Acquired	50.00%
Fair Value of Assets Acquired	$ 50
Non-cash [Member] \| Fluence [Member]
Investments in and Advances to Affiliates [Line Items]
Contribution of Property	$ 20			$ 20	$ 0