Basis of Presentation and Summary of Significant Accounting Policies (Details) £ in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) service_offering country		Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2018 GBP (£)	Sep. 30, 2018 USD ($)
Revenue, Net			$ 9,830		$ 10,265	$ 10,771
Number of Countries in which Entity Operates | country			160
Research, development and engineering expenses			$ 397		424	463
Selling, administrative and general expenses			2,390		2,526	2,636
Restructuring and related costs			158		216	259
Other expenses, net			268		329	321
Transaction and related costs, net			$ 68		9	0
Economic life of leased product			5 years
Sustaining engineering costs			$ 72		90	95
Number of Reportable Segments | service_offering			1
Number of Reporting Units | service_offering			1
Expected return on plan assets period			2 years
Sales
Cost of Goods and Services Sold			$ 2,412		2,487	2,656
Service [Member]
Cost of Goods and Services Sold			3,359		3,518	3,682
Accounting Standards Update 2016-02 [Member]
Lessee Accounting, Increase to Leased Assets and Liabilities, Discounted			385
Lessee Accounting, Increase to Leased Assets and Liabilities, Undiscounted			440
Accounting Standards Update 2016-02 [Member] | Scenario, Forecast [Member]
Lessor Accounting - Increase to Equipment Sales		$ 35
Accounting Standards Update 2016-15 [Member]
Consideration Received for Beneficial Interest Obtained for Transferring Financial Asset					234	270
Accounting Standards Update 2016-18 [Member]
Restricted Cash and Investments	$ 75		64		75	$ 179
Accounting Standards Update 2017-07 [Member]
Research, development and engineering expenses			424		463
Selling, administrative and general expenses			2,526	[1]	2,636
Restructuring and related costs			216		259
Other expenses, net			329		321
Accounting Standards Update 2017-07 [Member] | Sales
Cost of Goods and Services Sold			2,487		2,656
Accounting Standards Update 2017-07 [Member] | Service [Member]
Cost of Goods and Services Sold			3,518		3,682
Accounting Standards Update 2017-07 [Member] | Previously Reported [Member]
Research, development and engineering expenses			446		476
Selling, administrative and general expenses			2,622	[1]	2,695
Restructuring and related costs			220		264
Other expenses, net			141		200
Accounting Standards Update 2017-07 [Member] | Previously Reported [Member] | Sales
Cost of Goods and Services Sold			2,491		2,657
Accounting Standards Update 2017-07 [Member] | Previously Reported [Member] | Service [Member]
Cost of Goods and Services Sold			3,580		3,725
Accounting Standards Update 2017-07 [Member] | Adjustments for New Accounting Pronouncement [Member]
Research, development and engineering expenses			(22)		(13)
Selling, administrative and general expenses			(96)	[1]	(59)
Restructuring and related costs			(4)		(5)
Other expenses, net			188		121
Accounting Standards Update 2017-07 [Member] | Adjustments for New Accounting Pronouncement [Member] | Sales
Cost of Goods and Services Sold			(4)		(1)
Accounting Standards Update 2017-07 [Member] | Adjustments for New Accounting Pronouncement [Member] | Service [Member]
Cost of Goods and Services Sold			(62)		$ (43)
ASU 2018-05 [Member]
Tax Cuts And Jobs Act Incomplete Accounting Provision	$ 400		489
ASU 2018-05 [Member] | Scenario, Adjustment [Member]
Tax Cuts And Jobs Act Incomplete Accounting Provision			$ 89
United Kingdom, Pounds
Out-of-Period Adjustment, Gross | £							£ (40)
United States of America, Dollars
Out-of-Period Adjustment, Gross								$ 53
Out-of-Period Adjustment, Net								$ 43
Minimum [Member]
Equity Method Investment, Ownership Percentage			20.00%
Maximum [Member]
Equity Method Investment, Ownership Percentage			50.00%

[1] The 2017 reported amount for Selling, administrative and general expenses reflects the reclass of $9 for Transaction and related costs, net, in order to conform to the separate presentation of these costs in the 2018 Consolidated Statements of Income (Loss).