Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows from Operating Activities
Net income (loss)	$ 68	$ (668)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation, amortization and impairment	553	468
Stock-based compensation	211	208
Amortization of debt discounts and issuance costs	46	40
Inventory and purchase commitments write-downs	45	81
Loss on disposals of fixed assets	7	18
Foreign currency transaction net loss (gain)	19	(39)
Non-cash interest and other operating activities	58	116
Operating cash flow related to repayment of discounted convertible notes		(188)
Changes in operating assets and liabilities, net of effect of business combinations:
Accounts receivable	(14)	(100)
Inventory	(981)	(809)
Operating lease vehicles	(197)	13
Prepaid expenses and other current assets	(154)	(46)
Other non-current assets	40	28
Accounts payable and accrued liabilities	(265)	(41)
Deferred revenue	53	318
Customer deposits	88	(25)
Other long-term liabilities	(17)	(14)
Net cash used in operating activities	(440)	(640)
Cash Flows from Investing Activities
Purchases of property and equipment excluding finance leases, net of sales	(455)	(280)
Purchases of solar energy systems, net of sales	(26)	(25)
Receipt of government grants	1
Business combinations, net of cash acquired		(1)
Net cash used in investing activities	(480)	(306)
Cash Flows from Financing Activities
Proceeds from issuances of common stock in public offerings, net of issuance costs	2,309
Proceeds from issuances of convertible and other debt	2,802	1,494
Repayments of convertible and other debt	(2,318)	(1,970)
Collateralized lease repayments	(97)	(134)
Proceeds from exercises of stock options and other stock issuances	160	78
Principal payments on finance leases	(100)	(67)
Debt issuance costs		(8)
Proceeds from investments by noncontrolling interests in subsidiaries	19	47
Distributions paid to noncontrolling interests in subsidiaries	(67)	(85)
Payments for buy-outs of noncontrolling interests in subsidiaries		(8)
Net cash provided by (used in) financing activities	2,708	(653)
Effect of exchange rate changes on cash and cash equivalents and restricted cash	(24)	5
Net increase (decrease) in cash and cash equivalents and restricted cash	1,764	(1,594)
Cash and cash equivalents and restricted cash, beginning of period	6,783	4,277
Cash and cash equivalents and restricted cash, end of period	8,547	2,683
Supplemental Non-Cash Investing and Financing Activities
Acquisitions of property and equipment included in liabilities	415	120
Leased assets obtained in exchange for finance lease liabilities	32	218
Leased assets obtained in exchange for operating lease liabilities	$ 60	$ 22