Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Changes in Carrying Amount of Service and Product Warranties

The changes in the carrying amount of service and product warranties are as follows (in millions):

Balance at December 31, 2018	$	105
Net provisions for warranties issued during the year		41
Amounts incurred		(56	)
Currency translation adjustments		—
Balance at December 31, 2019	$	90
Net provisions for warranties issued during the year		22
Amounts incurred		(26	)
Currency translation adjustments		1
Balance at December 31, 2020	$	87

Computation of Weighted Average Basic and Diluted Shares Outstanding

The following table sets forth the computation of weighted average basic and diluted shares outstanding (in millions, except per share data):

	Years Ended December 31,
	2020			2019			2018
Numerator:
Net loss attributable to Company	$	(2,542	)	$	(6,095	)	$	(31	)
Denominator:
Basic—weighted average common shares outstanding		384			382			378
Dilutive effect of employee stock options and other unvested    stock awards		—			—			—
Diluted outstanding shares		384			382			378
Basic loss attributable to Company per share	$	(6.62	)	$	(15.96	)	$	(0.08	)
Diluted loss attributable to Company per share	$	(6.62	)	$	(15.96	)	$	(0.08	)
Cash dividends per share	$	0.05		$	0.20		$	0.20