Share Owners' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Increase (Decrease) in Share Owners' Equity
Balance	$ 42	$ 1,090	$ 564	$ 900
Issuance of common stock				$ 2
Issuance of common stock (in shares)				100,000
Reissuance of common stock	$ 2	$ 2	$ 7	$ 7
Reissuance of common stock (in shares)	200,000	10,000.00	700,000	200,000
Treasury shares purchased				$ (38)
Treasury shares purchased (in shares)				2,100,000
Stock compensation	$ 3	$ 4	$ 8	$ 15
Stock compensation (in shares)	100,000	10,000.00	900,000	1,700,000
Net earnings (loss)	$ 335	$ (567)	$ 289	$ (413)
Other comprehensive income (loss)	(117)	(86)	(592)	(17)
Dividends declared		(7)	(8)	(15)
Other			(3)	(5)
Balance	$ 265	$ 436	$ 265	$ 436
Authorization of common stock
Shares of common stock issued (including treasury shares)	250,000,000	250,000,000	250,000,000	250,000,000	250,000,000
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Shares of common stock issued (including treasury shares)	189,302,000	188,442,000	189,302,000	188,442,000	188,447,000
Treasury shares	32,136,000	32,812,000	32,136,000	32,812,000	32,573,000
Common Stock
Increase (Decrease) in Share Owners' Equity
Balance	$ 2	$ 2	$ 2	$ 2
Balance	2	2	2	2
Capital in Excess of Par Value
Increase (Decrease) in Share Owners' Equity
Balance	3,128	3,136	3,130	3,124
Issuance of common stock				2
Reissuance of common stock	(3)	(1)	(10)	(2)
Stock compensation	3	4	8	15
Balance	3,128	3,139	3,128	3,139
Treasury Stock
Increase (Decrease) in Share Owners' Equity
Balance	(724)	(742)	(733)	(705)
Reissuance of common stock	5	3	17	9
Treasury shares purchased				(38)
Other			(3)	(5)
Balance	(719)	(739)	(719)	(739)
Retained Earnings (Loss)
Increase (Decrease) in Share Owners' Equity
Balance	(147)	470	(89)	333
Net earnings (loss)	328	(575)	278	(430)
Dividends declared		(7)	(8)	(15)
Balance	181	(112)	181	(112)
Accumulated Other Comprehensive Loss.
Increase (Decrease) in Share Owners' Equity
Balance	(2,308)	(1,891)	(1,843)	(1,968)
Other comprehensive income (loss)	(117)	(64)	(582)	13
Balance	(2,425)	(1,955)	(2,425)	(1,955)
Non-controlling Interests
Increase (Decrease) in Share Owners' Equity
Balance	91	115	97	114
Net earnings (loss)	7	8	11	17
Other comprehensive income (loss)		(22)	(10)	(30)
Balance	$ 98	$ 101	$ 98	$ 101