Supplementary Financial Information (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Line Items]
Cash and cash equivalents		$ 723		$ 1,084
Litigation deposits in Brazil		62		61
Other restricted cash		1		3
Total Restricted cash		63		64
Cash, cash equivalents and restricted cash		786	$ 1,474	1,148	$ 1,368
Other current assets		1		1
Other long-term assets		62		$ 63
Provision for receivables		14	13
Provision for inventory		8	4
Provision for product warranty		4	4
Depreciation of buildings and equipment		27	44
Depreciation and obsolescence of equipment on operating leases		59	64
Amortization of internal use software		17	18
Amortization of acquired intangible assets		15	12
Amortization of customer contract costs(1)	[1]	24	25
Cost of additions to land, buildings and equipment		9	9
Cost of additions to internal use software		6	9
Common stock dividends		58	64
Preferred stock dividends		4	3
Payments to noncontrolling interests		$ 1	$ 12

[1] __________(1)Amortization of customer contract costs are reported in Increase in other current and long-term assets in the Condensed Consolidated Statements of Cash Flows. Refer to Note 5 - Revenue for additional information on contract costs.