CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Common stock	Capital in excess of par value	Treasury shares at cost	Accumulated other comprehensive income (loss)	Accumulated deficit	Total stock- holders’ equity	Non- controlling interests
Balance (in shares) at Dec. 31, 2018	292,790
Balance at Dec. 31, 2018	$ 10,690	$ 67	$ 15,460	$ (3,238)	$ 123	$ (1,907)	$ 10,505	$ 185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(16)					(21)	(21)	5
Other comprehensive income	(14)				(14)		(14)
Share-based compensation plans	$ 87		87				87
Shares issued pursuant to stock awards (in shares)	867
Shares issued pursuant to stock awards	$ 32			83		(51)	32
Treasury shares and restricted stock unit withholdings (in shares)	(8,482)
Treasury shares and restricted stock unit withholdings	$ (715)			(715)			(715)
Shareholder tax on repurchased shares	(62)					(62)	(62)
Dividends common stock	$ (71)					(71)	(71)
Balance (in shares) at Mar. 31, 2019	285,175
Balance at Mar. 31, 2019	$ 9,931	67	15,547	(3,870)	109	(2,112)	9,741	190
Balance (in shares) at Dec. 31, 2018	292,790
Balance at Dec. 31, 2018	$ 10,690	67	15,460	(3,238)	123	(1,907)	10,505	185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	30
Other comprehensive income	$ (5)
Balance (in shares) at Jun. 30, 2019	278,753
Balance at Jun. 30, 2019	$ 9,520	67	15,635	(4,497)	118	(1,998)	9,325	195
Balance (in shares) at Mar. 31, 2019	285,175
Balance at Mar. 31, 2019	$ 9,931	67	15,547	(3,870)	109	(2,112)	9,741	190
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	46					41	41	5
Other comprehensive income	9				9		9
Share-based compensation plans	$ 88		88				88
Shares issued pursuant to stock awards (in shares)	194
Shares issued pursuant to stock awards	$ 6			18		(12)	6
Treasury shares and restricted stock unit withholdings (in shares)	(6,616)
Treasury shares and restricted stock unit withholdings	$ (645)			(645)			(645)
Shareholder tax on repurchased shares	155					155	155
Dividends common stock	$ (70)					(70)	(70)
Balance (in shares) at Jun. 30, 2019	278,753
Balance at Jun. 30, 2019	$ 9,520	67	15,635	(4,497)	118	(1,998)	9,325	195
Balance (in shares) at Dec. 31, 2019	281,437
Balance at Dec. 31, 2019	$ 9,655	64	15,184	(3,037)	75	(2,845)	9,441	214
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(13)					(21)	(21)	8
Other comprehensive income	(61)				(61)		(61)
Share-based compensation plans	$ 108		108				108
Shares issued pursuant to stock awards (in shares)	497
Shares issued pursuant to stock awards	$ 29			47		(18)	29
Treasury shares and restricted stock unit withholdings (in shares)	(2,933)
Treasury shares and restricted stock unit withholdings	$ (355)			(355)			(355)
Expiration of stock purchase warrants			(56)			56
Dividends common stock	$ (105)					(105)	(105)
Balance (in shares) at Mar. 29, 2020	279,001
Balance at Mar. 29, 2020	$ 9,258	64	15,236	(3,345)	14	(2,933)	9,036	222
Balance (in shares) at Dec. 31, 2019	281,437
Balance at Dec. 31, 2019	$ 9,655	64	15,184	(3,037)	75	(2,845)	9,441	214
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(222)
Other comprehensive income	$ (25)
Balance (in shares) at Jun. 28, 2020	279,213
Balance at Jun. 28, 2020	$ 9,055	64	15,228	(3,325)	50	(3,155)	8,862	193
Balance (in shares) at Mar. 29, 2020	279,001
Balance at Mar. 29, 2020	$ 9,258	64	15,236	(3,345)	14	(2,933)	9,036	222
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(209)					(214)	(214)	5
Other comprehensive income	36				36		36
Share-based compensation plans	$ 104		104				104
Shares issued pursuant to stock awards (in shares)	252
Shares issued pursuant to stock awards	$ 8			23		(15)	8
Treasury shares and restricted stock unit withholdings (in shares)	(40)
Treasury shares and restricted stock unit withholdings	$ (3)			(3)			(3)
Expiration of stock purchase warrants			(112)			112
Dividends common stock	$ (105)					(105)	(105)
Balance (in shares) at Jun. 28, 2020	279,213
Balance at Jun. 28, 2020	$ 9,055	$ 64	$ 15,228	$ (3,325)	$ 50	$ (3,155)	$ 8,862	193
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	$ (34)							$ (34)