Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net earnings (loss)	$ (269)	$ (324)
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	405	479
Stock-based compensation	58	51
Realized (gain) loss on foreign currency forwards	(7)	(8)
(Gain) loss on equity securities	(22)	(37)
Deferred income tax expense (benefit)	(3)	44
Other noncash charges (credits), net	(7)	(35)
Changes in operating assets and liabilities
Current and other assets	(486)	(400)
Payables and other liabilities	2,482	1,906
Net cash provided (used) by operating activities	2,151	1,676
Cash flows from investing activities:
Capital expended for property and equipment and capitalized software	(275)	(194)
Purchases of short-term marketable securities and other investments	(462)	(867)
Sales of short-term marketable securities	7	317
Other, net	6	14
Net cash provided (used) by investing activities	(724)	(730)
Cash flows from financing activities:
Borrowings of debt	32	67
Repayments of debt	(37)	(66)
Shares issued by subsidiary	91	20
Shares repurchased by subsidiary	(25)	(202)
Dividends paid by subsidiary	(40)	(39)
Taxes paid in lieu of shares issued for stock-based compensation		(2)
Other financing activities, net	4	(6)
Net cash provided (used) by financing activities	25	(228)
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	(11)	17
Net increase (decrease) in cash, cash equivalents and restricted cash	1,441	735
Cash, cash equivalents and restricted cash at beginning of period	2,774	3,031
Cash, cash equivalents and restricted cash at end of period	$ 4,215	$ 3,766

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Balance Type:	credit
Period Type:	duration