Supplemental Financial Information - Earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (loss)	$ (13)	$ (16)
Less: Net income (loss) attributable to non-controlling interests	8	5
Net income (loss) attributable to stockholders	$ (21)	$ (21)
Weighted average number of shares outstanding (after deduction of treasury shares) during the year (in thousands) (in shares)	279,933	287,227
Options (in shares)	0	0
Restricted Share Units, Performance Share Units and Equity Rights (in shares)	0	0
Warrants (in shares)	0	0
Dilutive potential common share (in shares)	0	0
Adjusted weighted average number of share outstanding (after deduction of treasury shares) during the year (in thousands) (in shares)	279,933	287,227
Basic net income (loss) (in dollars per share)	$ (0.08)	$ (0.07)
Diluted net income (loss) (in dollars per share)	$ (0.08)	$ (0.07)
Maximum | Employee Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	1,100	1,800
Maximum | Restricted Stock Units Performance Share Units And Equity Rights
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	7,900	7,800
Maximum | Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	7,600	11,300
Common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exercise price of warrants or rights (in dollars per share)	$ 130.46	$ 132.19